Patent US3676759A successfully refreshed from Google Patents.
US3676759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
On-off motor control push button switch for photographic apparatus
Assignee: Agfa Gevaert AG
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Filing: 1970-09-22
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Granted: 1972-07-11
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Expires: 1990-09-22
Abstract
Abstract Pressing a release turns on, or triggers, a bistable electronic switch, such as a multivibrator or a semiconductor tetrode, which in turn renders an amplifying transistor conductive through which an electromagnet is energized, closing a switch that operates the motor of the photographic apparatus. Re-pressing the release shuts off, or reverses the state, of the bistable switch, and thereby turns off the amplifying transistor. Another release is so connected that the bistable multivibrator is conductive, or triggered to the right state, as long as the release is depressed. The two releases can be combined into a single release by using a selector switch.
Inventors
- 👤 Helmut Mayr
- 👤 Richard Pelte
- 👤 Theo Hubert
- 👤 Helmut Strasser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:47
CPC Classifications
G; G03; G03B; G03B9/00; G03B9/58; G03B19/00; G03B19/18
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
214 words
In a motor control arrangement for photographic apparatus having an electric motor for driving the mechanism of the apparatus, in combination, electronic amplifier means having a conductive and a non-conductive state; electromagnet means connected to said amplifier means to be energized when the latter is in said conductive state; motor switch means for the motor operated by said electromagnet means to close and open when the latter is energized and de-energized, respectively, thereby turning the motor on or off; manually operated switch means; bistable electronic switch means connected to said amplifier means and to said manually operated switch means to render said amplifier means alternately conductive and non-conductive upon operation of the manually operated switch means, whereby the motor is alternately turned on and off, said amplifier means having an input and said bistAble electronic switch means being a semiconductor tetrode having two contact electrodes and two control electrodes, said two contact electrodes being connected to said amplifier means input, and one of said control electrodes being connected to said manually operated switch means, said manually operated switch means comprising first and second switch means, said first switch means being connected across said two contact electrodes of said tetrode and said second switch means being connected to said one control electrode of said tetrode.
Claim 2
Dependent Claim
214 words
In a motor control arrangement for photographic apparatus having an electric motor for driving the mechanism of the apparatus, in combination, electronic amplifier means having a conductive and a non-conductive state; electromagnet means connected to said amplifier means to be energized when the latter is in said conductive state; motor switch means for the motor operated by said electromagnet means to close and open when the latter is energized and de-energized, respectively, thereby turning the motor on or off; manually operated switch means; bistable electronic switch means connected to said amplifier means and to said manually operated switch means to render said amplifier means alternately conductive and non-conductive upon operation of the manually operated switch means, whereby the motor is alternately turned on and off, said amplifier means having an input and said bistAble electronic switch means being a semiconductor tetrode having two contact electrodes and two control electrodes, said two contact electrodes being connected to said amplifier means input, and one of said control electrodes being connected to said manually operated switch means, said manually operated switch means comprising first and second switch means, said first switch means being connected across said two contact electrodes of said tetrode and said second switch means being connected to said one control electrode of said tetrode.
Claim 3
Dependent Claim
26 words
In a motor control arrangement as defined in claim 1, including respective switch operating release means for actuating each of said first and second switch means.
Claim 4
Dependent Claim
20 words
In a motor control arrangement as defined in claim 2, wherein each of said release means is a diaphragm switch.
Claim 5
Dependent Claim
220 words
In a motor control arrangement for photographic apparatus having an electric motor for driving the mechanism of the apparatus, in combination, electronic amplifier means having a conductive and a non-conductive state; electromagnet means connected to said amplifier means to be energized when the latter is in said conductive state; motor switch means for the motor operated by said electromagnet means to close and open when the latter is energized and deenergized, respectively, thereby turning the motor on or off; manually operated switch means; bistable electronic switch means connected to said amplifier means and to said manually operated switch means to render said amplifier means alternately conductive and non-conductive upon operation of the manually operated switch means, whereby the motor is alternately turned on and off, said amplifier means having an input and said bistable electronic switch means being a semiconductor tetrode having two contact electrodes and two control electrodes, said two contact electrodes being connected to said amplifier means input, and one of said control electrodes being connected to said manually operated switch means; switch-operating release means for operating said manually operated switch means; and two-position selector switch means for connecting said manually operated switch means across said two contact electrodes of said tetrode, in one position, and to said one control electrode of said tetrode, in the other position.
Claim 6
Dependent Claim
220 words
In a motor control arrangement for photographic apparatus having an electric motor for driving the mechanism of the apparatus, in combination, electronic amplifier means having a conductive and a non-conductive state; electromagnet means connected to said amplifier means to be energized when the latter is in said conductive state; motor switch means for the motor operated by said electromagnet means to close and open when the latter is energized and deenergized, respectively, thereby turning the motor on or off; manually operated switch means; bistable electronic switch means connected to said amplifier means and to said manually operated switch means to render said amplifier means alternately conductive and non-conductive upon operation of the manually operated switch means, whereby the motor is alternately turned on and off, said amplifier means having an input and said bistable electronic switch means being a semiconductor tetrode having two contact electrodes and two control electrodes, said two contact electrodes being connected to said amplifier means input, and one of said control electrodes being connected to said manually operated switch means; switch-operating release means for operating said manually operated switch means; and two-position selector switch means for connecting said manually operated switch means across said two contact electrodes of said tetrode, in one position, and to said one control electrode of said tetrode, in the other position.
Claim 7
Dependent Claim
22 words
In a motor control arrangement as defined in claim 4, including switch operating release means for operating said manually operated switch means.
Claim 8
Dependent Claim
18 words
In a motor control arrangement as defined in claim 5, wherein said release means is a diaphragm switch.
Claim 9
Dependent Claim
32 words
In a motor control arrangement as defined in claim 4, wherein said selector switch means comprises two ganged switch means having each a movable contact connected to said manually operated switch means.
Claim 10
Dependent Claim
280 words
In a motor control arrangement for photographic apparatus having an electric motor for driving the mechanism of the apparatus, in combination, electronic amplifier means having a conductive and a non-conductive state; electromagnet means connected to said amplifier means to be energized when the latter is in said conductive state; motor switch means for the motor operated by said electromagnet means to close and open when the latter is energized and deenergized, respectively, thereby turning the motor on or off; manually operated switch means; bistable electronic switch means connected to said amplifier means and to said manually operated switch means to render said amplifier means alternately conductive and non-conductive upon operation of the manually operated switch means, whereby the motor is alternately turned on and off, said amplifier means having an input and said bistable electronic switch means being a semiconductor tetrode having two contact electrodes and two control electrodes, said two contact electrodes being connected to said amplifier means input, and one of said control electrodes being connected to said manually operated switch means, said amplifier means including a transistor, said electromagnet meaNs being connected to the collector of said transistor; an output circuit for said tetrode; voltage-dividing means comprising series-connected resistance means and capacitance means, said manually operated switch means and said tetrode output circuit connecting the base of said transistor to the common junction between said series-connected resistance means and capacitance means; voltage source means; resistance means for connecting said one control electrode of said tetrode to one pole of said voltage source means; first capacitor means connected in series with the motor, said manually operated switch means connecting said one control electrode to said first capacitor means.
Claim 11
Dependent Claim
280 words
In a motor control arrangement for photographic apparatus having an electric motor for driving the mechanism of the apparatus, in combination, electronic amplifier means having a conductive and a non-conductive state; electromagnet means connected to said amplifier means to be energized when the latter is in said conductive state; motor switch means for the motor operated by said electromagnet means to close and open when the latter is energized and deenergized, respectively, thereby turning the motor on or off; manually operated switch means; bistable electronic switch means connected to said amplifier means and to said manually operated switch means to render said amplifier means alternately conductive and non-conductive upon operation of the manually operated switch means, whereby the motor is alternately turned on and off, said amplifier means having an input and said bistable electronic switch means being a semiconductor tetrode having two contact electrodes and two control electrodes, said two contact electrodes being connected to said amplifier means input, and one of said control electrodes being connected to said manually operated switch means, said amplifier means including a transistor, said electromagnet meaNs being connected to the collector of said transistor; an output circuit for said tetrode; voltage-dividing means comprising series-connected resistance means and capacitance means, said manually operated switch means and said tetrode output circuit connecting the base of said transistor to the common junction between said series-connected resistance means and capacitance means; voltage source means; resistance means for connecting said one control electrode of said tetrode to one pole of said voltage source means; first capacitor means connected in series with the motor, said manually operated switch means connecting said one control electrode to said first capacitor means.
Claim 12
Dependent Claim
22 words
In a motor control arrangement as defined in claim 8, including first resistance means connected in series with said first capacitor means.
Claim 13
Dependent Claim
34 words
In a motor arrangement as defined in claim 9, wherein said motor switch means when closed connects the motor directly to said voltage source means and shorts said series-connected first capacitor and resistance means.
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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |