Patent US3832599A successfully refreshed from Google Patents.
US3832599A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vital more restrictive speed command sensing circuit
Assignee: Trane US Inc
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Filing: 1973-08-15
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Granted: 1974-08-27
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Expires: 1993-08-15
Abstract
Abstract This disclosure relates to a vital type of more restrictive vehicle speed command sensing circuit arrangement including a speed decoding unit, a switching circuit, a storage circuit and an acknowledging circuit. When a more restrictive speed command is received, the switching circuit is rendered conductive. The conduction of the switching circuit causes the acknowledging circuit to be activated by the storage circuit thereby acknowledging the reception of a more restrictive speed command.
Inventors
- 👤 R Grundy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:12
CPC Classifications
G; G01; G01P; G01P1/00; G01P1/07; G01P1/08; G01P1/10; B; B61; B61L; B61L3/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
65 words
A more restrictive vehicle speed sensing arrangement comprising, a speed decoding unit responsive to a more restrictive speed command signal, a switching circuit coupled to said speed decoding unit, a storage circuit coupled to said switching circuit, and an acknowledging circuit coupled to said storage circuit and being activated by said storage circuit when said switching circuit is rendered conductive by said speed decoding unit.
Claim 2
Dependent Claim
65 words
A more restrictive vehicle speed sensing arrangement comprising, a speed decoding unit responsive to a more restrictive speed command signal, a switching circuit coupled to said speed decoding unit, a storage circuit coupled to said switching circuit, and an acknowledging circuit coupled to said storage circuit and being activated by said storage circuit when said switching circuit is rendered conductive by said speed decoding unit.
Claim 3
Dependent Claim
23 words
A more restrictive vehicle speed sensing arrangement as defined in claim 1, wherein said acknowledging circuit includes an electromagnetic relay having multiple windings.
Claim 4
Dependent Claim
19 words
A more restrictive vehicle speed sensing arrangement as defined in claim 1, wherein said storage circuit includes a capacitor.
Claim 5
Dependent Claim
23 words
A more restrictive vehicle speed sensing arrangement as defined in claim 1, wherein said switching circuit includes a pair of cascaded NPN transistors.
Claim 6
Dependent Claim
34 words
A more restrictive vehicle speed sensing arrangement as defined in claim 1, wherein said speed decoding unit controls a plurality of electrical contacts each of which varies the input resistance to said switching circuit.
Claim 7
Dependent Claim
43 words
A more restrictive vehicle speed sensing arrangement as defined in claim 1, wherein said acknowledging circuit includes a relay having a first winding which is energized by said storage circuit and which closes a stick circuit for a second winding of the relay.
Claim 8
Dependent Claim
38 words
A more restrictive vehicle speed sensing arrangement as defined in claim 1, wherein said storage circuit includes a capacitor which is charged when said switching circuit is nonconducting and which is discharged when said switching circuit is conducting.
Claim 9
Dependent Claim
22 words
A more restrictive vehicle speed sensing arrangement as defined in claim 1, wherein said acknowledging circuit includes a polar biased electromagnetic relay.
Claim 10
Dependent Claim
26 words
A more restrictive vehicle speed sensing arrangement as defined in claim 8, wherein said polar biased electromagnetic relay includes a pickup coil and a holding coil.
Claim 11
Dependent Claim
42 words
A more restrictive vehicle speed sensing arrangement as defined in claim 1, wherein said storage circuit includes a capacitor which is charged when said switching circuit is cut off and which energizes said acknowledging circuit when said switching circuit is rendered conductive.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |