US3784292A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Battery test arrangement in a motion picture camera
Assignee: Agfa Gevaert AG
•
Filing: 1972-09-20
•
Granted: 1974-01-08
•
Expires: 1992-09-20
Abstract
Abstract Connected in parallel with the electromotor driving the film transport is a threshold circuit which causes an indicator lamp to light when the voltage applied thereto is too low. A single switch connects both the threshold circuit and the electromotor to the battery, causing the battery to be tested under actual operation. Contacts which are closed at the end of the film can be interconnected with the threshold circuit to cause the lamp to light at film end.
Inventors
- 👤 A Winkler
- 👤 T Huber
- 👤 H Mayr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:31
CPC Classifications
G; G03; G03B; G03B19/00; G03B19/18
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
190 words
In a moving picture camera having an electromotor, battery means having a battery output voltage for supplying energy to said electromotor and switch means connecting said electromotor, to said battery means when closed, a battery test arrangement, comprising, in combination, threshold circuit means responsive to an applied voltage for furnishing an output signal when said applied voltage is less than a predetermined voltage, said threshold circuit means comprising voltage divider means connected in parallel with said electromotor and having a voltage divider tap, and amplifier means having a control element connected to said voltage divider tap and an output circuit for furnishing said output signal; indicator means connected to said threshold circuit means for furnishing an indicator output in response to said output signal; and connecting means directly connecting said threshold circuit means in parallel with said electromotor in such a manner that said switch means connect both said electromotor and said threshold circuit means to said battery means when closed, whereby said battery output voltage constitutes said applied voltage and said indicator means furnish said indicator output signal when said battery output voltage is less than said predetermined voltage.
Claim 2
Dependent Claim
190 words
In a moving picture camera having an electromotor, battery means having a battery output voltage for supplying energy to said electromotor and switch means connecting said electromotor, to said battery means when closed, a battery test arrangement, comprising, in combination, threshold circuit means responsive to an applied voltage for furnishing an output signal when said applied voltage is less than a predetermined voltage, said threshold circuit means comprising voltage divider means connected in parallel with said electromotor and having a voltage divider tap, and amplifier means having a control element connected to said voltage divider tap and an output circuit for furnishing said output signal; indicator means connected to said threshold circuit means for furnishing an indicator output in response to said output signal; and connecting means directly connecting said threshold circuit means in parallel with said electromotor in such a manner that said switch means connect both said electromotor and said threshold circuit means to said battery means when closed, whereby said battery output voltage constitutes said applied voltage and said indicator means furnish said indicator output signal when said battery output voltage is less than said predetermined voltage.
Claim 3
Dependent Claim
57 words
An arrangement as set forth in claim 1, wherein said amplifier means comprise first transistor means having a base connected to said voltage divider tap and an emitter-collector circuit, and second transistor means having an emitter-base circuit connected in parallel with said emitter-collector circuit of said first transistor means, and a collector connected to said indicator means.
Claim 4
Dependent Claim
210 words
In a moving picture camera having an electromotor, battery means having a battery outpput voltage for supplying energy to said electromotor and switch means connecting said electromotor to said battery means when closed, a battery test arrangement, comprising, in combination, threshold circuit means responsive to an applied voltage for furnishing an output signal when said applied voltage is less than a predetermined voltage, said threshold circuit means comprising voltage divider means connected in parallel With said electromotor and having a voltage divider tap, first transistor means having a base connected to said voltage divider tap and an emitter-collector circuit, and second transistor means having an emitter-base circuit connected in parallel with said emitter-collector circuit of said first transistor means, and a collector; indicator means connected to said collector of said threshold circuit means, for furnishing an indicator output in response to said output signal; and connecting means directly connecting said threshold circuit means in parallel with said electromotor in such a manner that said switch means connect both said electromotor and said threshold circuit means to said battery means when closed, whereby said battery output voltage constitutes said applied voltage and said indicator means furnish said indicator output signal when said battery output voltage is less than said predetermined voltage.
Claim 5
Dependent Claim
210 words
In a moving picture camera having an electromotor, battery means having a battery outpput voltage for supplying energy to said electromotor and switch means connecting said electromotor to said battery means when closed, a battery test arrangement, comprising, in combination, threshold circuit means responsive to an applied voltage for furnishing an output signal when said applied voltage is less than a predetermined voltage, said threshold circuit means comprising voltage divider means connected in parallel With said electromotor and having a voltage divider tap, first transistor means having a base connected to said voltage divider tap and an emitter-collector circuit, and second transistor means having an emitter-base circuit connected in parallel with said emitter-collector circuit of said first transistor means, and a collector; indicator means connected to said collector of said threshold circuit means, for furnishing an indicator output in response to said output signal; and connecting means directly connecting said threshold circuit means in parallel with said electromotor in such a manner that said switch means connect both said electromotor and said threshold circuit means to said battery means when closed, whereby said battery output voltage constitutes said applied voltage and said indicator means furnish said indicator output signal when said battery output voltage is less than said predetermined voltage.
Claim 6
Dependent Claim
16 words
An arrangement as set forth in claim 3, wherein said indicator means comprise an indicator lamp.
Claim 7
Dependent Claim
87 words
An arrangement as set forth in claim 3, wherein said moving picture camera further comprises film transport means activated by said electromotor for transporting film along a predetermined path; further comprising contact means connected in parallel with said emitter-base circuit of second transistor means, positioned along said predetermined path for sensing the absence or presence of said film, said contact means short circuiting said emitter-base circuit of said second transistor means in the absence of said film, thereby activating said indicator means to furnish said indicator output.
Claim 8
Dependent Claim
43 words
An arrangement as set forth in claim 5, further comprising interrupter means connected in series with said contact means, for periodically interrupting the connection between said contact means and said emitter-base circuit of said second transistor means, thereby furnishing an interrupting indicator output.
Claim 9
Dependent Claim
24 words
An arrangement as set forth in claim 3, further comprising capacitance means connected between said base and said collector of said first transistor means.
References Cited (Backward Citations)
US3583800A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |