US3854142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Data recording camera
Assignee: Individual
•
Filing: 1973-03-26
•
Granted: 1974-12-10
•
Expires: 1993-03-26
Abstract
Abstract A data recording camera for periodically photographing oscilloscope displays, using a self-threading takeup cassette which may be removed without fogging remaining film, and a solenoid-driven pivoted-blade shutter which closes during automatic film advancing. Film is supplied from a supply spool and automatically severed adjacent the cassette by a solenoiddriven knife prior to release of the cassette from the camera. Data is projected from the oscilloscope face onto the emulsion side of the film by a lens system, and a removeable data slide may have the data written on it contact printed onto the rear side of the film by an internal lamp. The film is automatically advanced before and after the data card is projected onto it, and the camera is disabled during operations likely to fog the film. The interlocks also disable the camera when the cassette is not in place, when it is full, when the camera is out of film and when the film supply compartment is open. The electronic control circuit controls the duration of shutter opening, with decade incremental selection of duration, and also boosts shutter opening by applying an initial opening voltage higher than the subsequent holding voltage. Delay circuits allow the shutter to begin closing before the film is moved, and hold the shutter closed to allow time for film movement to be completed.
Inventors
- 👤 D Beaman
- 👤 W Mccombie
- 👤 E Whitley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:47
CPC Classifications
G; G03; G03B; G03B19/00; G03B19/02; G03B15/00; G03B15/003; G03B17/00; G03B17/24; G03B2217/00; G03B2217/24; G03B2217/242; G03B2217/243
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
247 words
A data recording camera, comprising a first light-tight housing having a film exposure gate therein, a supply spindle for holding a supply of film within said first housing, a shutter in said housing positioned to interrupt light passing from outside said first housing to said gate, a lens system in said first housing for imaging data at said film exposure gate, a film advancing mechanism for advancing film from said supply through said gate, a second light-tight housing for receiving said film after said film passes through said gate, and a control circuit for controlling the operation of said shutter and said film advancing mechanism comprising, a timing circuit comprising a multivibrator having first and second states and producing a first output signal when in said first state and a second output signal when in said second state, a first delay circuit triggered by said first output signal of said multivibrator and operative after a selected duration of delay, to produce an output signal to trigger operation of said film advancing mechanism and reset said multivibrator to said second state, a second delay circuit triggered by the output signal of said first delay circuit and operative to first actuate said film advancing mechanism in response thereto and then to terminate said actuation after a selected duration of delay, and a shutter control circuit responsive to said first output of said multivibrator to close said shutter and to said second output of said multivibrator to open said shutter.
Claim 2
Dependent Claim
247 words
A data recording camera, comprising a first light-tight housing having a film exposure gate therein, a supply spindle for holding a supply of film within said first housing, a shutter in said housing positioned to interrupt light passing from outside said first housing to said gate, a lens system in said first housing for imaging data at said film exposure gate, a film advancing mechanism for advancing film from said supply through said gate, a second light-tight housing for receiving said film after said film passes through said gate, and a control circuit for controlling the operation of said shutter and said film advancing mechanism comprising, a timing circuit comprising a multivibrator having first and second states and producing a first output signal when in said first state and a second output signal when in said second state, a first delay circuit triggered by said first output signal of said multivibrator and operative after a selected duration of delay, to produce an output signal to trigger operation of said film advancing mechanism and reset said multivibrator to said second state, a second delay circuit triggered by the output signal of said first delay circuit and operative to first actuate said film advancing mechanism in response thereto and then to terminate said actuation after a selected duration of delay, and a shutter control circuit responsive to said first output of said multivibrator to close said shutter and to said second output of said multivibrator to open said shutter.
Claim 3
Dependent Claim
188 words
A data recording camera as described in claim 1 and wherein said shutter control circuit comprises a first power supply supplying a first voltage, a second power supply supplying a second voltage higher than said first voltage, a first transistor having its emitter and collector connected in series with the supply of electrical power from said first power supply to said shutter and its base connected to respond to the issuance of said first and second output signals from said multivibrator, a second transistor having its emitter and collector connected in series with the supply of electrical power from said second power supply to said shutter and its base connected to said first transistor to begin supplying base drive to said second transistor upon conduction in said first transistor, and delay means in the circuit supplying base drive to the base of said second transistor effective to terminate said drive a selected interval after said drive is begun, whereby a higher voltage will be supplied to said shutter to initiate opening of same, and a lower voltaGe will subsequently be supplied to said shutter to maintain said opening.
Claim 4
Dependent Claim
196 words
A data recording camera as described in claim 1 and wherein said timing circuit multivibrator comprises a pair of cross-connected transistors forming a flip-flop having first and second states, an operational amplifier integrated circuit device operated as a differential amplifier having first and second inputs and a positive feedback loop, a resistor-capacitor circuit having a variable resistance and a capacitor therein for supplying drive to said first input of said differential amplifier, said second input being coupled to the source of direct current to create a reference level in said device, said capacitor being charged in response to said second state of said cross-connected pair of transistors and being discharged through said variable resistor, the discharge of said capacitor reducing the drive supplied to said first input of said differential amplifier below the level of input to said second input of said differential amplifier, whereby said differential amplifier will produce output signal constituting said second output signal upon the charging of said capacitor and will continue said second output signal for a time selected by said variable resistor, said second output signal being communicated to said shutter control circuit to govern the opening of the shutter.
Claim 5
Dependent Claim
100 words
A data recording camera as described in claim 1 and wherein said film advancing mechanism comprises an actuating device responsive to passage of current to cause the film to be advanced, and said control circuit further comprises an antiadvance interlock circuit, said anti-advance interlock circuit comprising a switch means activated by a movable portion of said camera, and a low resistance in series with said switch means, said switch means and said resistance together being in parallel with said actuating device, whereby closure of said switch means will shunt said actuating device to render actuation of said actuating device impossible.
Claim 6
Dependent Claim
65 words
A data recording camera as described in claim 1 and wherein said control circuit further comprises an automatic forced advancement circuit, said forced advancement circuit comprising a switch means activated by a movable portion of said camera and connected to said second delay circuit to cause said second delay circuit to immediately produce an output signal to said film advancing mechanism to advance the film.
Claim 7
Dependent Claim
207 words
A data recording camera as described in claim 1 further comprising a film cutoff mechanism in said first housing adjacent said second housing and aperture to sever said film adjacent to said second housing, and wherein said control circuit further comprises a cut and release circuit, said cut and release circuit comprising a manually actuable switch, a timer motor supplied with current via said manually actuable switch and having a drive shaft, first and second cam means carried on said drive shaft, a first cam-actuated switch having a follower bearing on said first cam means, and a second cam-actuated switch having a follower bearing on said second cam means, said first cam-actuated switch being connected to said second delay circuit to immediately produce an output signal to said film advancing mechanism to advance the film, said second cam-actuated switch being connected to said film cutoff mechanism to activate said mechanism, said first and second cam means being phased on said drive shaft such that said first cam-actuated switch is actuated before said second cam-actuated switch, whereby the film will be advanced to carry the last exposed frame out of the exposure gate and into the takeup cassette before the film is severed by the film cutoff mechanism.
Claim 8
Dependent Claim
117 words
A data recording camera as described in claim 6 and wherein said cut and release mechanism further comprises a third cam means carried on said drive shaft and a third camactuated switch actuated by said third cam means, said third cam-actuated swItch supplying current to said timer motor in parallel with said manually actuable switch, said third cam means being formed to actuate said third cam-actuated switch during rotation of a major portion of the rotational circumference thereof, whereby said timer motor will be locked on for a full rotation of said drive shaft once said manually actuable switch has been briefly closed and the cycle of said cut and release mechanism will be completed once begun.
Claim 9
Dependent Claim
39 words
A data recording camera as described in claim 7 and wherein said first cam means is formed to actuate said first cam-actuated switch a plurality of times before said second cam-actuated switch is actuated by said second cam means.
Claim 10
Dependent Claim
78 words
A data recording camera as described in claim 4 and wherein said switch means is activated by a movable portion of said camera which is moved in the course of opening a portion of said camera, the opening of which would tend to fog a portion of the film, whereby the fogging of the film will be limited to the portion initially fogged by prevention of movement of the film while said portion of said camera is open.
Claim 11
Dependent Claim
89 words
A data recording camera as described in claim 5 and wherein said forced advancement circuit comprises a plurality of said switch means, each switch means activated by one of a plurality of movable portions of said camera, said movable portions being positioned and arranged to be moved during the reclosure of a portion of said camera, the opening of which might tend to fog the film, whereby the fogged portion of the film will be advanced out of the film gate upon reclosure of the portion of the camera.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |