US3631359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multivibrator driven regenerative transistor drive circuit for lamp flasher
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1970-05-06
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Granted: 1971-12-28
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Expires: 1990-05-06
Abstract
Abstract This is a solid-state lamp flasher operated from an oscillator using the combination of NPN-transistor and a PNP-transistor to drive the load and create regenerative action and another NPNtransistor to stop the regenerative action when it receives a signal from the oscillator.
Inventors
- 👤 Raymond A Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:36
CPC Classifications
H; H05; H05B; H05B39/00; H05B39/09; H03; H03K; H03K3/00; H03K3/02; H03K3/26; H03K3/28; H03K3/281; H03K3/282; H03K3/2823
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
104 words
An oscillating circuit comprising an oscillator having an output circuit, the output circuit is connected through a coupling capacitor and a current limiting resistor to the base of a drive transistor which has its collector connected to the base of a first transistor whose collector is connected to a load and to the base of the drive transistor through other electrical elements, the output circuit is further connected to the base of a second transistor, the collector of which is connected to the base of the drive transistor, and the emitters of the second transistor and the drive transistor are connected to negative potential.
Claim 2
Dependent Claim
104 words
An oscillating circuit comprising an oscillator having an output circuit, the output circuit is connected through a coupling capacitor and a current limiting resistor to the base of a drive transistor which has its collector connected to the base of a first transistor whose collector is connected to a load and to the base of the drive transistor through other electrical elements, the output circuit is further connected to the base of a second transistor, the collector of which is connected to the base of the drive transistor, and the emitters of the second transistor and the drive transistor are connected to negative potential.
Claim 3
Dependent Claim
28 words
An oscillating circuit as set forth in claim 1 wherein the collector of the first transistor is connected to the base of the drive transistor through a diode.
Claim 4
Dependent Claim
16 words
An oscillating circuit as set forth in claim 1 wherein the oscillator is an astable multivibrator.
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) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |