US3631388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine oil and water temperature audio warning system
Assignee: Individual
•
Filing: 1970-09-08
•
Granted: 1971-12-28
•
Expires: 1990-09-08
Abstract
Abstract A system which audibly warns a driver of a motor vehicle when either the engine oil pressure is too low or the temperature is too high. The system is so arranged that the audible warning is not sounded during initial startup of the engine when the oil pressure is inherently low.
Inventors
- 👤 Raymond K Strong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:29
CPC Classifications
B; B60; B60R; B60R16/00; B60R16/02; B60R16/023; B60R16/0231; B60R16/0232
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
160 words
An engine oil pressure and water temperature audio warning system for connection between the positive terminal of a vehicle storage battery and the oil pressure and water temperature warning light control switches thereof which are connected to ground, said system comprising an audible signaling device, time delay relay means coupling said device in series with said positive terminal and said control switches, said relay means having a control circuit portion for effecting opening of the circuit between said device and control switches in response to energization of the control circuit portion and effecting closing of the circuit a predetermined time delay after deenergization, and means for connecting said control circuit portion and a starter circuit energization switch of the vehicle in series between said terminal and ground, whereby said device is sounded in response to closure of said warning light control switches except during said predetermined time delay following closure of said starter circuit energization switch to start said vehicle.
Claim 2
Dependent Claim
160 words
An engine oil pressure and water temperature audio warning system for connection between the positive terminal of a vehicle storage battery and the oil pressure and water temperature warning light control switches thereof which are connected to ground, said system comprising an audible signaling device, time delay relay means coupling said device in series with said positive terminal and said control switches, said relay means having a control circuit portion for effecting opening of the circuit between said device and control switches in response to energization of the control circuit portion and effecting closing of the circuit a predetermined time delay after deenergization, and means for connecting said control circuit portion and a starter circuit energization switch of the vehicle in series between said terminal and ground, whereby said device is sounded in response to closure of said warning light control switches except during said predetermined time delay following closure of said starter circuit energization switch to start said vehicle.
Claim 3
Dependent Claim
97 words
A system according to claim 1, further defined by said relay means comprising a starter dropout relay including normally closed contacts and an operating coil, and a time delay relay including normally closed time delayed closing contacts and an operating coil, said contacts of said relays serially connected between said signaling device and said warning light controL switches, said device being connected to said battery terminal, said operating coils comprising said control circuit portion and being parallel connected between said starter circuit energization switch and ground, said starter circuit energization switch being connected to said battery terminal.
References Cited (Backward Citations)
US1481471A
Cited
US2511631A
Cited
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 |