Patent US1018531A successfully refreshed from Google Patents.
Patent US3586918A successfully refreshed from Google Patents.
US3586918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Programmable intervalometer
Assignee: United States Department of the Air Force
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Filing: 1969-09-23
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Granted: 1971-06-22
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Expires: 1989-09-23
Abstract
Abstract A series of relay release stations which, when activated, connect power for launching. Activation is controlled by transistor switches, all but the first requiring a pulse from a switch driver and all but the first and second having clamping circuits to prevent activation until a voltage is impressed from the preceding relay. Timing is controlled by a selection of capacitors and variable resistors through a ganged switch. An initial power delay can be used.
Inventors
- 👤 Homer F Roland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:12
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/28; G; G05; G05B; G05B19/00; G05B19/02; G05B19/04; G05B19/07
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
270 words
An intervalometer comprising: a. a series of release stations, each station including a launch relay having set and reset terminals and a transistor switch feeding the relays; b. a source of voltage having one terminal connected to the set terminal and the other to the reset terminal of each of the relays; c. means for applying the voltage to the first launch relays of the series of stations; d. time control means connected to the launch relays for automatically activating successive stations following the first station, said means being connected to the launch relay and including selectable banks of resistors and capacitors with one terminal of the resistors being selectably connected to the voltage source and the other terminal to the bank of capacitors; e. a switch driver connected to the transistor switches of the second and succeeding stations; f. a series of clamping circuits connected to the third and succeeding transistor switches, the clamping voltage being fed from the reset terminal of the preceding station; and g. antichatter means interposed between the source of voltage and the launch relays including, 1. a protection relay having switch contacts controlling the source of voltage to the launch relays and a relay coil with a grounded first terminal; 2. a transistor having the emitter connected to the voltage source and the collector connected to the second terminal of the coil; 3. a capacitor and a first resistor interposed between the voltage source and the first terminal of the relay coil; and 4. a second resistor interposed between the base of the transistor and a point between the first resistor and the capacitor.
Claim 2
Dependent Claim
270 words
An intervalometer comprising: a. a series of release stations, each station including a launch relay having set and reset terminals and a transistor switch feeding the relays; b. a source of voltage having one terminal connected to the set terminal and the other to the reset terminal of each of the relays; c. means for applying the voltage to the first launch relays of the series of stations; d. time control means connected to the launch relays for automatically activating successive stations following the first station, said means being connected to the launch relay and including selectable banks of resistors and capacitors with one terminal of the resistors being selectably connected to the voltage source and the other terminal to the bank of capacitors; e. a switch driver connected to the transistor switches of the second and succeeding stations; f. a series of clamping circuits connected to the third and succeeding transistor switches, the clamping voltage being fed from the reset terminal of the preceding station; and g. antichatter means interposed between the source of voltage and the launch relays including, 1. a protection relay having switch contacts controlling the source of voltage to the launch relays and a relay coil with a grounded first terminal; 2. a transistor having the emitter connected to the voltage source and the collector connected to the second terminal of the coil; 3. a capacitor and a first resistor interposed between the voltage source and the first terminal of the relay coil; and 4. a second resistor interposed between the base of the transistor and a point between the first resistor and the capacitor.
Claim 3
Dependent Claim
21 words
a transistor having the emitter connected to the voltage source and the collector connected to the second terminal of the coil;
Claim 4
Dependent Claim
21 words
a transistor having the emitter connected to the voltage source and the collector connected to the second terminal of the coil;
Claim 5
Dependent Claim
179 words
An intervalometer comprising: a. a series of release stations, each station including a launch relay having set and reset terminals and a transistor switch feeding the relays; b. a source of voltage having one terminal connected to the set terminal and the other to the reset terminal of each of the relays; c. means for applying the voltage to the first launch relay of the series of stations; d. time control means connected to the launch relays for automatically activating successive stations following the first station, said meanS being connected to the launch relay and including selectable banks of resistors and capacitors with one terminal of the resistors being selectably connected to the voltage source and the other terminal to the bank of capacitors; e. a switch driver connected to the transistor switches of the second and succeeding stations; f. a series of clamping circuits connected to the third and succeeding transistor switches, the clamping voltage being fed from the reset terminal of the preceding station; and g. means for doubling the time between launchings of successive stations including,
Claim 6
Dependent Claim
179 words
An intervalometer comprising: a. a series of release stations, each station including a launch relay having set and reset terminals and a transistor switch feeding the relays; b. a source of voltage having one terminal connected to the set terminal and the other to the reset terminal of each of the relays; c. means for applying the voltage to the first launch relay of the series of stations; d. time control means connected to the launch relays for automatically activating successive stations following the first station, said meanS being connected to the launch relay and including selectable banks of resistors and capacitors with one terminal of the resistors being selectably connected to the voltage source and the other terminal to the bank of capacitors; e. a switch driver connected to the transistor switches of the second and succeeding stations; f. a series of clamping circuits connected to the third and succeeding transistor switches, the clamping voltage being fed from the reset terminal of the preceding station; and g. means for doubling the time between launchings of successive stations including,
Claim 7
Dependent Claim
11 words
a first transistor having an emitter connected to the voltage source;
Claim 8
Dependent Claim
11 words
a first transistor having an emitter connected to the voltage source;
Claim 9
Dependent Claim
15 words
a second transistor having the base connected to the rotary terminal of the doubler switch;
Claim 10
Dependent Claim
15 words
a second transistor having the base connected to the rotary terminal of the doubler switch;
Claim 11
Dependent Claim
20 words
a capacitor and a first resistor interposed between the voltage source and the first terminal of the relay coil; and
Claim 12
Dependent Claim
20 words
a capacitor and a first resistor interposed between the voltage source and the first terminal of the relay coil; and
Claim 13
Dependent Claim
201 words
An intervalometer comprising: a. a series of release stations, each station including a launch relay having set and reset terminals and a transistor switch feeding the relays; b. a source of voltage having one terminal connected to the set terminal and the other to the reset terminal of each of the relays wherein the reset terminals of the final relay are connected to the voltage source for distribution to the intervalometer and the set terminals connect the source of voltage to the output terminals of the intervalometer; c. means for applying the voltage to the first launch relay of the series of stations; d. time control means connected to the launch relays for automatically activating successive stations following the first station, said means being connected to the launch relay and including selectable banks of resistors and capacitors with one terminal of the resistors being selectably connected to the voltage source and the other terminal to the bank of capacitors; a switch driver connected to the transistor switches of the second and succeeding stations; and f. a series of clamping circuits connected to the third and succeeding transistor switches, the clamping voltage being fed from the reset terminal of the preceding station.
Claim 14
Dependent Claim
201 words
An intervalometer comprising: a. a series of release stations, each station including a launch relay having set and reset terminals and a transistor switch feeding the relays; b. a source of voltage having one terminal connected to the set terminal and the other to the reset terminal of each of the relays wherein the reset terminals of the final relay are connected to the voltage source for distribution to the intervalometer and the set terminals connect the source of voltage to the output terminals of the intervalometer; c. means for applying the voltage to the first launch relay of the series of stations; d. time control means connected to the launch relays for automatically activating successive stations following the first station, said means being connected to the launch relay and including selectable banks of resistors and capacitors with one terminal of the resistors being selectably connected to the voltage source and the other terminal to the bank of capacitors; a switch driver connected to the transistor switches of the second and succeeding stations; and f. a series of clamping circuits connected to the third and succeeding transistor switches, the clamping voltage being fed from the reset terminal of the preceding station.
Claim 15
Dependent Claim
20 words
a second resistor interposed between the base of the transistor and a point between the first resistor and the capacitor.
Claim 16
Dependent Claim
20 words
a second resistor interposed between the base of the transistor and a point between the first resistor and the capacitor.
Claim 17
Dependent Claim
28 words
a third transistor having the collector connected to the base of the second transistor; 5.a fourth transistor having the base connected to the collector of the first transistor;
Claim 18
Dependent Claim
28 words
a third transistor having the collector connected to the base of the second transistor; 5.a fourth transistor having the base connected to the collector of the first transistor;
Claim 19
Dependent Claim
28 words
a multivibrator including fifth and sixth interconnected transistors, the emitter and collector of the fourth transistor being connected respectively to the emitter and collector of the fifth transistor;
Claim 20
Dependent Claim
28 words
a multivibrator including fifth and sixth interconnected transistors, the emitter and collector of the fourth transistor being connected respectively to the emitter and collector of the fifth transistor;
Claim 21
Dependent Claim
19 words
a seventh transistor having the emitter and collector connected to the emitter and collector of the sixth transistor respectively;
Claim 22
Dependent Claim
19 words
a seventh transistor having the emitter and collector connected to the emitter and collector of the sixth transistor respectively;
Claim 23
Dependent Claim
22 words
an eighth transistor having the collector connected to the voltage source and the emitter connected to the emitter of the second transistor;
Claim 24
Dependent Claim
22 words
an eighth transistor having the collector connected to the voltage source and the emitter connected to the emitter of the second transistor;
Claim 25
Dependent Claim
13 words
a capacitor having one terminal connected to the collector of the eighth transistor;
Claim 26
Dependent Claim
13 words
a capacitor having one terminal connected to the collector of the eighth transistor;
Claim 27
Dependent Claim
16 words
a diode connecting the other terminal of the capacitor to the base of the seventh transistor;
Claim 28
Dependent Claim
16 words
a diode connecting the other terminal of the capacitor to the base of the seventh transistor;
Claim 29
Dependent Claim
14 words
a ninth transistor having the base connected to the collector of the second transistor;
Claim 30
Dependent Claim
14 words
a ninth transistor having the base connected to the collector of the second transistor;
Claim 31
Dependent Claim
31 words
a 10th transistor having the base connected to the collector of the ninth transistor; and 13.a switch driver transistor having the base thereof coupled to the collector of the 10th transistor.
Claim 32
Dependent Claim
31 words
a 10th transistor having the base connected to the collector of the ninth transistor; and 13.a switch driver transistor having the base thereof coupled to the collector of the 10th transistor.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |