US3670565A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cycle counter for jet engines
Assignee: Individual
•
Filing: 1970-07-15
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Granted: 1972-06-20
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Expires: 1990-07-15
Abstract
Abstract Apparatus for providing a representation of engine life including thermally responsive and throttle responsive switches and an indicator. Provision is made for energizing the indicator when the thermally responsive and throttle responsive switches are closed and subsequently preventing an indication from being registered on the indicator after the throttle responsive switch is opened and reclosed.
Inventors
- 👤 Allen E Paulson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:13
CPC Classifications
F; F02; F02B; F02B77/00; F02B77/08; F02B77/083; G; G06; G06M; G06M1/00; G06M1/08; G06M1/10; G07; G07C; G07C3/00; G07C3/02; G07C3/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
76 words
Apparatus for providing a representation of engine life comprising; thermally responsive switch means having an open and closed position; throttle responsive switch means having an open and closed position; indicator means; and control means for energizing said indicator means when said thermally responsive switch and said throttle responsive switch are closed, said control means being constructed to prevent an indication from being registered on said indicator means after said throttle responsive switch is opened and re-closed.
Claim 2
Dependent Claim
76 words
Apparatus for providing a representation of engine life comprising; thermally responsive switch means having an open and closed position; throttle responsive switch means having an open and closed position; indicator means; and control means for energizing said indicator means when said thermally responsive switch and said throttle responsive switch are closed, said control means being constructed to prevent an indication from being registered on said indicator means after said throttle responsive switch is opened and re-closed.
Claim 3
Dependent Claim
13 words
Apparatus according to claim 1, wherein said control means comprises a relay means.
Claim 4
Dependent Claim
17 words
Apparatus according to claim 2, wherein said control means includes a holding circuit for said relay means.
Claim 5
Dependent Claim
26 words
Apparatus according to claim 3, wherein said control means includes time delay means for interrupting a circuit to the indicator means after completing the holding circuit.
Claim 6
Dependent Claim
44 words
Apparatus according to claim 2 wherein said relay means is a double pole throw type wherein one set of contacts makes before the other set of contacts breaks so as to maintain energization of said relay when said throttle responsive switch means is opened.
Claim 7
Dependent Claim
56 words
Apparatus according to claim 1 embodying circuit means includes first switch means, second switch means, and third switch means, wherein closing of said thermally responsive switch and said throttle responsive switch energizes said first switch means thereby energizing said second switch means and allowing the energization of said third switch means thereby energizing said counting means.
Claim 8
Dependent Claim
21 words
Apparatus according to claim 6 wherein said first switch means, said second switch means and said third switch means are transistors.
Claim 9
Dependent Claim
12 words
Apparatus according to claim 1 wherein said indicator means is a counter.
Claim 10
Dependent Claim
28 words
Apparatus as in claim 4, wherein said time delay means comprises a member movable by the relay and lost motion connections between said member and the interrupting 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) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |