HETURNVIDEO/sz `L56 26 [-14
USO05325202A
United States Patent [191
[11] Patent Number:
Washino
[45]
-
CONTROL SYSTEM
Kinya Washino, 80 Hamilton Ave.,
Dumont, NJ. 07624
Jun. 28, 1994
BVP-370, BVP 270.
3-Chip CCD Portable Color Camera BVP-70/7OP.
Primary Examiner-Victor R. Kostak
Assistant Examiner-Nathan J. Flynn
Attorney, Agent, or Firm-Krass 8t. Young
[21] Appl. No.: 45,255
Apr. 13, 1993
[221 Filed:
[51] Int. CL5 ........................................... .. H04N 5/262
[52] US. Cl. ................................ .. 348/222; 3484/373;
[5 3]
Date of Patent:
Future Productions Inc. “Breakthrough in Video Pro
duction and Duplication”.
3-Chip CCD Studio/OB Color Camera System
[54] VIDEO FIELD-PRODUCTION CAMERA
[76] Inventor:
5,325,202
[57]
Answer
3484/ 705; 3484/722; 3484/ 372
A video ?eld-production control system is adapted for
Field of Search ............... .. 358/185, 149, 160, 86,
use with video cameras supplied by various manufactur
ers, including cameras that utilize cable-oriented
remote-control units associated with electronic news
358/181, 210, 83, 335, 86; H04N 5/08, 5/262,
5/ 14
[56]
gatherings (ENG). An industry standard mounting
References Cited
frame holds a central control unit with interface mod‘
ules dedicated to each camera to be used by the system,
U.S. PATENT DOCUMENTS
3,258,531
6/1966
as well as a power supply, master synchronization gen
Reindl et a1. .‘ ..................... .. 358/210
4,148,069 4/1979 Smiley et al_
4,180,829 12/1979
erator and production switcher, all common to each
installed interface module. In addition to providing
customized connecters and cables to the attached equip
358/160
Pires .............. ..
4,218,709
4,700,230 10/1987
8/1980 Baxter
Pshtissky
et a1.
et al. ................. .. 358/181
ment, each module provides for cable compensation
and gain adjustment of composite and component video
FOREIGN PATENT DOCUMENTS
0004671
1/1982
signals from the camera to the switcher plus phase ad
justment of the master sync signal to the camera
Japan ........................... .. 1-104N 5/26
through an adapter further capable of providing the
OTHER PUBLICATIONS
voltages necessary to power the camera.
Robinson, “The Video Primer”, 1983 p. 235, 267, 268
17 Claims, 4 Drawing Sheets
and 350.
30
34
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5,325,202
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unit with modules, adapters and custom cables associ
VIDEO FIELD-PRODUCTION CAMERA
CONTROL SYSTEM
ated with each camera and its remote-control unit. The
central control unit is designed to accommodate several
FIELD OF THE INVENTION
power from the common power supply to the camera
of these modules, each module being operative to route
This invention relates generally to systems employed
to coordinate video cameras and related equipment
through an adapter speci?ed for that camera, adjust the
phase of the master synchronization signal in accor
dance with an operator control and route the adjusted
during remote-site productions and, in particular, to a
video ?eld-production control system that takes advan- l0 signal to the camera through the adapter. The system is
also adapted to receive video signals from the camera
tage of the remote-control units supplied with video
cameras from various manufacturers.
BACKGROUND OF THE INVENTION
In the business of video electronic ?eld production
through the adapter, adjust for cable compensation and
gain in accordance with an operator control, and route
the adjusted video signal to the production switcher.
The system is capable of accommodating both com
(EFP), it is not uncommon to use a variety of video 15 posite and component video signals, with connectors,
cameras and related equipment from various manufac
cable compensation and gain circuitry for each video
turers at a remote site. Typically one or more operators
use remote controls from a central production console
to facilitate the management of the various camera
signal from the camera to the switcher. In the preferred
embodiment, connectors are provided for composite
and Y, (R-Y), and (B-Y) component signals; however,
shots.
the invention is equally applicable to alternative compo
Although camera manufacturers generally offer re~
nent systems, including RGB, YIQ (the NTSC system),
mote control units for their own equipment, integration
YUV
(the PAL system), YD RD5 (the SECAM), as well
of these controls is difficult because of the differences in
as high-defmition systems.
their physical and electrical con?gurations. For exam
If a particular camera requires specialized voltages,
ple, the various cameras may require different power 25
the common power supply voltage fed to the camera is
supply voltages to operate. Additionally, the more eco
converted ?rst by the adapter into the required volt
nomical remote units supplied by the camera manufac
ages, whether positive or negative. The system also
turers, in particular, the ENG-type or electronic news
provides
connectors for a video tape recorder dedicated
gathering camera controllers are unsuitable for such
remote production applications because they do not 30 to a particular camera, an intercom connection, a tally
light with associated connectors and cabling to indicate
provide for long length cable compensation. Typically,
which module and accompanying camera have been
the cables between the camera and its supplied remote
selected by an operator using the switcher.
are limited to a distance of 100 feet or less. Moreover,
Speci?c features and advantages of the present sys
these ENG-type controllers do not have the requisite
provisions for sync-phase and color-phase adjustments
demanded by multi-camera con?gurations.
35 tem will now be described in detail, this detailed de
scription making reference to the following ?gures:
FIG. 1 is a block diagram of the system showing
connections made to a single module;
video equipment during ?eld production, including the
FIGS. 2A and 2B are schematic diagrams used to
direct control of cameras without the need for their 40 illustrate the electrical components and wiring within
supplied remote units, but the size and cost of these
one of the modules;
more complex units are often prohibitive to the small
FIG. 3 is a drawing of the front panel to a module
and medium video production house. As such, there
indicating the operator controls; and
remains a need for a “universal” type of camera-control
FIG. 4 is a drawing of the rear panel of a module
unit, that ?lls the gap between incompatible remotes 45 showing the connectors thereon provided.
supplied by camera manufacturers and the more expen
DETAILED DESCRIPTION OF THE
sive and sophisticated general purpose ?eld production
PREFERRED EMBODIMENT
units. Such a controller would be fully compatible with
the remote control units supplied by the camera manu
The present invention is a video ?eld-production
facturers, yet overcome the obstacles relating to overall 50 control system that allows video cameras and related
cooperation, synchronization, cable-length compensa
equipment from diverse manufacturers to be controlled
tion and packaging.
remotely from a central location. The invention allows
' the use of ENG-type controllers supplied by the video
SUMMARY OF THE INVENTION
The present invention ?lls the gap previously delin 55 camera manufacturers by providing a drawer-like shelf
to hold these controllers within the framework. The
eated by providing a universal type of camera control
At the same time, more sophisticated Universal cam~
era controllers are available which can coordinate
unit for video ?eld production that takes advantage of
the camera manufacturer’s own full-feature camera
control units, enclosing these and other necessary com
ponents in a convenient, modular unit that can be
adapted to provide standardized and uniform control to
physical mounting provisions follow an industry-stand
ard con?guration. The result is a system that provides
all of the features and capabilities of a more sophisti
cated full-speci?cation studio-type camera control unit,
but at a much more economical cost.
Referring now to FIG. 1, the system, indicated gener
ally
at 12, includes a central control unit 14 and inter
eras of diverse manufacturers and utilizes the more
face module 16, though the central unit 14 may accom
economical ENG-type remote units, thereby providing
65 modate a plurality of such modules, as indicated by
protection from system obsolescence.
broken lines 18. In the preferred embodiment, central
The system of the present invention includes a
unit 14 is provided with a chassis onto which ?ve mod
mounting frame with a power supply, a master sync
ules may be installed.
generator, a production switcher and a central control
the operator. In particular, the system integrates cam
3
5,325,202
4
A video camera 20 having a lens 22 and view?nder/
monitor 23 attaches to a multiple contact connector 24
disposed on a rear panel 26 of module 16. A cable 28
signals must be individually adjusted for any differences
interfaces to an adapter 30, the cable and adapter being
require modi?cation because they involve high frequen
customized for a camera 20 from a particular manufac
turer. The cable and adapter are used to carry power,
cies which are reduced in amplitude in direct propor
tion to the distance traveled. In particular, video signals
synchronization and control signals to the camera and
to carry video, audio and status signals from the camera
to the module. These signals will be described in greater
detail with reference to FIGS. 2 through 4.
Another connector 32, disposed on rear panel 26 of
module 16 may be attached to a video tape recorder 34
via cable 36, if it is desired to have a recording unit
dedicated to the camera associated with a particular
module. In an alternative embodiment the separate cam
era and VTR units may be replaced with a camcorder in
which the camera and VTR are integrated into a single
unit.
The remote-control unit 38 supplied by the manufac
turer of camera 20 connects to connecter 40 on panel 26
of module 16 through a custom cable 42. A drawer-like
shelf (not shown) serves to hold these remote control
units below the central control unit 14 disposed on its
in the length of the camera cables and the internal cir
cuitry of the various cameras, and the video signals
along lines 70 from the camera each feed a cable com
pensation unit 72 and an ampli?er 74. Each of the four
video signals shown, having been compensated and
ampli?ed is fed to a separate connecter 58 disposed on
module 16 rear panel 26 for connection via lines 56 to
production switcher 52 shown in FIG. 1.
The system has thus far been described with refer
ence to composite and Y/R-Y/B-Y component video
signals, but the present invention is not limited to this
configuration, and indeed may take advantage of any
standard or nonstandard video encoding scheme,
whether adapted for 525 scan lines, 625, or high-defmi
tion schemes now being proposed. For example, al
though Y, R-Y and B-Y are the three components ordi
narily generated by conventional NTSC-based cameras,
the present invention also anticipates cables, connectors
and circuitry for signals associated with the Y, I and Q
mounting frame.
axes normally used for encoding NTSC signals. Simi
25
The system includes a power supply 44 which feeds
larly, whereas Y, R-Y and B-Y signals are generally
the required DC voltages along line 46, preferably in
provided in conjunction with 625-line PAL and
cluding a 48-volt signal, to power cameras, lenses, and
SECAM systems, it is also possible to accommodate
view?nder/monitors, plus appropriate voltages as re
signals associated with the Y, U, and V axes used for
quired to power all modules installed in central unit 14.
PAL
encoding or the Y, DR and DB SECAM axes.
A master synchronization generator 48, also common to
The present invention is also capable of using R, G
all modules, supplies a master sync or GENLOCK
and B component signals; although outmoded for most
signal along line 50, as well to a production switcher 52
component video applications, the R/G/B system may
via line 54.
be
applicable to certain computer graphics applications.
Production switcher 52 receives component video
Finally, while it is not yet clear which standard will be
signals along lines 56, from separate connectors 58 on
adopted for high-de?nition TV systems, the present
rear panel 26 of module 16. These component video
invention is not precluded from taking advantage of
signals include a Y signal, R-Y and B-Y signal, having
such systems as they become commercially practicable.
been compensated and ampli?ed within module 16, a
Even in all-digital camera systems the present inven
process which will be described in detail with reference
tion
should prove useful. The cable-compensation and
to FIG. 2.
selects which video camera will be activated at a given
ampli?cation circuitry just described will improve the
“squareness” of the serial-digital pulses, particularly
also provides a composite video signal 64 from the
tion switcher; effect, each input represents the storage
camera 20 through a separate connector 66 in the event
of an entire video frame. A central master sync genera
tor will also be required to interface with each camera
The production switcher, under operator control,
over long distances. In an alternative embodiment, the
time and produces a video out signal along line 57 to an
system
may further include a slice-and-regenerate cir
attached video tape recorder unit 60. The switcher also
provides a video out signal along line 62 common to all 45 cuit to reproduce the digital bit stream with the highest
degree of accuracy. The timing adjustment function is
modules, enabling an operator utilizing a remote camera
performed automatically for digital inputs to a produc
20 to see the signal that is being recorded. Module 16
that an application cannot take advantage of the compo
nent signals. Operator controls for module 16 are dis
posed on a front panel 68 which will be described in
more detail with reference to FIG. 3.
Turning now to FIG. 2, there is shown a schematic
to maintain overall synchronization.
Controls associated with each cable compensation
, unit and ampli?er are disposed on front panel 68 of
module 16, those controls associated with cable com
diagram of the electrical components and wiring con 55 pensation preferably including course and ?ne adjust
ment, shown in FIG. 3 at 76, and a gain adjustment 78,
tained within a module 16. All of the wires on the left
side of FIG. 2 connect to the camera through connecter
controlling each ampli?er 74.
In the preferred embodiment, the actual circuitry
24 via cable 28 and adapter 30 of FIG. 1. Some signals
performing the cable compensation 72 would rely upon
are passed through module 16 with no changes, such as
the intercom signal wiring 63, which is routed from 60 commercially available transistors and wideband opera
tional ampli?ers, such as the MCl496 double-balanced
connector 39 to camera connector 24. Another example
modulator/demodulator. For the coarse adjustment,
is the camera integral microphone audio signal wiring
65, which travels along line 80 from the camera connec
switched transistor/resistor/capacitor networks adjust
the frequency response of the individual input video
94. Most of the modi?cations to signals passing through 65 signals under control of the selector switch 76. For ?ne
control, the double-balanced modulator/demodulator
the module involve two sets of signals: the synchroniz
varies the high-frequency response under DC-voltage
ing signals transmitted to the camera, and the video
control. The ampli?cation 74 is performed by straight
signals returned from the camera. The synchronizing
tor 24 to the VTR connector 32 and also to connector
5
5,325,202
forward transistor ampli?ers feeding transistor output
6
buffers.
Each compensated and ampli?ed video signal is also
switcher. Camera connecter 24 utilizes a similar multi
contact connecter to custom cable 28 and adapter 30
shown in FIG. 1. Intercom connecter 39 and audio out
routed to connecter 32 so that a video tape recorder 34
connector 94 utilize standard microphone-style jacks,
may be attached to record the incoming video signal.
Audio is separately supplied to connecter 32 along line
and camera remote connecter 40 facilitates a custom
interconnection via cable 42 customized for the remote
control unit supplied with the camera. Tally-out is
available through connecter 90.
Thus the present invention ?lls an unsatis?ed need for
80 from the camera via connecter 24, and VTR record
switch 88 is preferably included on the module front
panel, allowing an operator to activate and deactivate
VTR 34.
10 an economical “universal-type” of camera control unit
for electronic ?eld production. The system just de
Power from power supply 44, preferably 48 volts DC
scribed provides all of the features and capabilities of a
for powering camera, lens, and view?nder/monitor, as
well as for providing appropriate voltages to power the
circuitry in the individual modules, enters the module
along line 46 and is routed to the camera via connecter
24. A master synchronization or “GENLOCK” signal
from the master sync generator enters the module along
line 50 and provides an input to an electronic automatic
full-speci?cation professional camera control unit at a
much lower cost. As an additional bene?t, the power
for both the camera and its supplied remote control unit
is provided by a separate power supply through an
interface module; in the normal configuration, the cam
era must be equipped with internal batteries, which
have a limited life between recharging periods to power
phase control unit 82, having a horizontal phase adjust
ment 84 and subcarrier coarse and ?ne phase adjust 20 both the camera and the remote controller, which re
sults in heavier equipment and increased operator fa
ments 86, controls 84 and 86 being disposed on the front
panel of the module. The GENLOCK signal, having
tigue. Furthermore, by utilizing interchangeable system
being so compensated, leaves APC unit 82 as a video
components and integrating ENG-type controllers as
opposed to resorting to much more expensive studio
25 type camera control units, the system of the present
black burst signal or VHS signal and is then routed out
to the camera via connecter 24.
A return video signal from the production switcher
enters the module along line 62 and is also relayed to the
invention is protected from obsolescence when any one
camera or other system component is replaced.
I claim:
1. A video ?eld-production camera control system.
camera view?nder/monitor via connecter 24. The com
mon power supply signal along line 46, the master syn
chronization signal along line 50 and the return video
signal 62 from the production switcher are each fed to
other modules'along lines 460, 50a and 62a, respec
tively. As a convenience, the camera “tally-out” light
90 is provided on the front panel of the module to indi
adapted for use in conjunction with equipment of vary‘
ing con?guration, including a master sync generator
operative to generate a master synchronization signal, a
production switcher unit operative to provide a pro
gram video-out signal by selecting among video input
cate when the camera associated with that module has 35 signals, and video cameras, including cameras that uti
lize cable remote-control units, the control system com‘
been selected by the production switcher, by way of
prising:
“tally-in” connector 92.
a mounting frame upon which said sync generator
In operation, the operator of the system installs a
and said switcher unit may be mounted;
module for each camera to be used, makes all appropri
a power supply disposed on said frame;
ate connections to the rear panel of the module and, 40
a central control unit disposed on said frame and
after energizing the system and all related equipment,
connected to the power supply, sync generator and
utilizes the controls provided on the front panel of the
production switcher, the control unit being
module as shown in FIG. 3. Two separate APC adjust
adapted to accept a plurality of interface modules
ments are provided on the' front panel of the module,
for installation therein, each module being con
one set for horizontal phase adjustment at 84, and one 45
nected through a cable to an adapter interfaced to
set, with coarse and ?ne adjustments, for the subcarrier
a video camera to be used with the system, and
phase at 86. When using an oscilloscope, these provi
each module being operative to:
sions make it a simple procedure to perform the preci
sion timing synchronization adjustments required for
switching and combining signals from the multiple sig
route power from the power supply to the camera
50
nal sources utilized.
The separate cable compensation circuits 72 in FIG.
2 are adjusted by coarse and ?ne front panel controls
shown at 76 in FIG. 3. Preferably, the coarse adjust
ment has markings to indicate general cable length of 55
15/100/200/300 meters, and, having set a general dis
tance the ?ne tuning control to the right of the coarse
control is then set. The gain for each of the ampli?ers 74
in FIG. 2 may then be controlled with adjustment 78.
through the adapter;
adjust the phase of said master synchronization
signal in accordance with an operator control
and route the adjusted synchronization signal to
the camera through the adapter; and
receive at least one composite or component video
signal from the camera through the adapter,
adjust for cable frequency compensation and
gain in accordance with an operator control, and
route the adjusted video signal to said produc
tion switcher.
VTR record start/stop switch is indicated at position
2. The video ?eld-production control system of claim
88.
1 wherein a plurality of component video signals are
FIG. 4 is a drawing used to show the position of the
received by each module from the adapter connected
various connectors disposed on the rear panel of each
thereto.
module. In the preferred configuration, the adjusted
3. The video ?eld-production control system of claim
video signals from the camera are available both 65
1 wherein said adapter is further operative to derive a
through the 26-pin industry standard “Betacam”-style
voltage required to operate said camera from the volt
connecter 32 as well as through individual BNC-type
connecters at 58 for connection to the production
age supplied by said power supply.
7
5,325,202
8
8. The video ?eld production control system of claim
4. The video ?eld-production control system of claim
1 wherein the operator control in each interface module
associated with adjusting the phase of said master syn
7 wherein said adapter further includes voltage regula
tion circuitry adapted to receive the output of said
power supply through said camera cable and generate
chronization signal provides for horizontal phase ad
justment and subcarrier phase adjustment.
therefrom a voltage required to operate said camera.
9. The video ?eld production control system of claim
5. The video ?eld-production control system of claim
1 wherein each interface module further includes a tally
lamp connected to a tally-in signal from the production
switcher and wherein said module further provides a
tally-out signal to the camera through the adapter, the
7 wherein said video-out connectors include connectors
for composite video and connectors associated with a
component video standard.
10. A video ?eld-production control system adapted
for use in conjunction with equipment of varying con
lamp being illuminated and the tally-out signal being
?guration, including cable-remote-controlled video
asserted when the camera associated with said interface
module has been selected.
6. The video ?eld-production control system of claim
1 wherein each interface module further includes a
VTR record start/stop switch connected to a record
cameras, video tape recorders, sync generators of the
type that provide a GENLOCK signal, and production
video switchers operative, under user control, to pro
vide a video-out signal by choosing among video-in
start/stop signal from the camera through the adapter,
signals, the control system comprising:
said switch being operative to activate and de-activate a
video tape recorder dedicated to the camera associated
20
with each module.
7. A video ?eld-production control system adapted
for use in conjunction with related equipment of vary
ing con?guration, including a master sync generator
operative to generate a master synchronization signal, a 25
production switcher unit operative to provide a pro
generator and production switcher, the control
unit being adapted to accommodate a plurality of
interface modules for installation therein, each
module including:
>
nector, a remote connector, a composite video
out connector, and component video-out con
a framework having installed thereon a power sup
ply, said master sync generator, said production
switcher, and a plurality of interface modules, each
being connected to the power supply, sync genera
tor and production switcher, and each module
a chassis with a panel having disposed thereon a
plurality of connectors, including a camera con
erator, said production switcher, a power supply
operative to supply a DC voltage, and a central
control unit connected to the power supply, sync
a chassis with a panel having disposed thereon a
plurality of connectors, including a camera con
gram video out signal by selecting among video input
signals and cable-remote-controlled video cameras, the
control system comprising:
including:
a framework having installed thereon said sync gen
nectors;
an adapter and camera cable used to connect a
camera to the camera connector disposed on said
35
module, thereby enabling the cable to carry
power, synchronization and control signals to
the camera and video, audio and status signals
from the camera to said module, the adapter
being operative to derive ally voltages necessary
nector, a remote connector and video-out con
to operate the camera;
nectors;
operator-adjustable cable-compensation circuitry‘
an adapter and camera cable used to connect a
video camera to the camera connector, thereby
disposed on said chassis and connected to said
camera connector, said cable-compensation cir
enabling said cable to carry power, synchroniza
tion and control signals to the camera and video,
cuitry being operative to allow an operator to
audio and status signals from the camera to said
compensate each video signal carried by said
module;
camera cable in accordance with the-length of
operator-adjustable cable-compensation circuitry
said cable;
operator-adjustable ampli?cation circuitry dis
disposed on said chassis and connected to said
camera connector, said cable-compensation cir
posed on said chassis and connected between
cuitry being operative to allow an operator to
compensate each video signal from said camera 50
in accordance with the length of said camera
operator-controlled phase-adjustment circuitry
posed on said chassis and connected between
55
cuitry being operative to allow an operator to
adjust the gain of each video signal;
operator-controlled phase-adjustment circuitry
disposed on said chassis and connected between 60
said master sync generator and said camera con
nector, said phase-adjustment circuitry being
said ampli?cation circuitry being operative to
allow an operator to adjust the gain of each sig
nal associated therewith;
cable;
operator-adjustable ampli?cation circuitry dis
said cable-compensation circuitry and said
video-out connectors, said ampli?cation cir
said cable-compensation circuitry and said com
posite and said component video-out connectors,
disposed on said chassis and connected between
said master sync generator and said camera con
nector, said phase-adjustment circuitry being
operative to allow an operator to adjust the hori
zontal phase and sub-carrier phase of the GEN
LOCK signal prior to its delivery to said camera.
a remote cable adapted to be connected between
said remote connector and said remote unit.
operative to allow an operator to adjust the
11. The video ?eld-production control system of
phase of the synchronization signal delivered to
claim 10 wherein said remote unit is of the electronic
65 news gathering (ENG) type.
said camera; and
12. The video ?eld-production control system of
a remote cable adapted to be connected between
claim 10 wherein the voltage supplied by .said power
said remote connector and said remote unit, if
supplied.
supply is greater than 12 volts DC.
5,325,202
10
signal being asserted when the camera associated with
said interface module has been selected.
16. The video ?eld-production control system of
claim 10 wherein the panel on each module chassis has
further disposed thereon a VTR connector connected
13. The video ?eld-production control system of
claim 10 wherein said adapter is capable of deriving
both positive and negative voltages required to operate
said camera.
14. The video field-production control system of
claim 10 wherein the panel on each module chassis has
to an output of said ampli?cation circuitry, thereby
enabling a video cassette recorder attached to said VTR
further disposed thereon an intercom connector con
connector to record a video signal produced by the
nected to said camera connector, thereby enabling an
camera connected to that module.
operator to communicate with the operator of the cam
17. The video ?eld-production control system of
10
era connected to that module.
claim 16 'wherein each interface module further in
15. The video ?eld-production control system of
claim 10 wherein each interface module further in
cludes a tally lamp connected to a tally-in signal from
the production switcher and wherein said module fur
ther provides a tally-out signal to the camera through
cludes a VTR record start/stop switch connected to a
record start/stop signal from the camera through the
adapter, said switch being operative to activate and
de-activate said video tape recorder.
#
the adapter, the lamp being illuminated and the tally-out
25
35
45
55
65
t
‘
i
t
UNITED STATES PATENT AND TRADEMARK OFFICE
CERTIFICATE OF CORRECTION
PATENTNO. :
DATED
1
5,325,202
June 28, 1994
|NVENTOR(S) :
Washi no
It is certified that error appears in the above-indentified patent and that said Letters Patent is hereby
corrected as shown below:
Column 4, line 48 , delete "effect" and insert —-in effect-—;
Column 8, line 38, delete I'all'y'I and insert --any-—;
Column 8 , line 45, delete "the- length" and insert ——the
length-—.
Signed and Sealed this
Eleventh Day of October, 1994
BRUCE LEHMAN
Arresting O?icer
Commissioner of Patents and Trademarks
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