Patent US3772642A successfully refreshed from Google Patents.
US3772642A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Warning device for motor vehicles
Assignee: Individual
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Filing: 1971-04-07
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Granted: 1973-11-13
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Expires: 1991-04-07
Abstract
Abstract A sound warning apparatus for motor vehicles to warn by audible alarm of a faulty oil pressure, water temperature, electric generator or of unauthorised entry. One buzzer is parallel connected to existing indicator lights in the vehicle directly but to the generator with a rectifier interposed in series. The rectifier makes it possible to have a single buzzer only, potentially energised by all the causes mentioned, by virtue of the fact that the rectifier prevents a potential short circuit condition arising.
Inventors
- 👤 A Schlorke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:57
CPC Classifications
B; B60; B60R; B60R16/00; B60R16/02; B60R16/023; B60R16/0231; B60R16/0232
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
212 words
Warning apparatus for a motor vehicle having a battery means, a generator means and a plurality of engine characteristics sensing units, each of said sensing units including switch means constructed and arranged to actuate electric circuit means when the engine characteristic being monitored reaches a certain level, said apparatus comprising: a converter means for converting electrical energy input into audible sound energy, said converter means having two terminals for the input of electrical energy, and said converter means being constructed and arranged for being located in a position in the vehicle where the sound will be audible to the operator of said vehicle, a first conductor means connected in circuit between a first terminal of said converter means and one of the terminals of said battery, a second conductor means connected in circuit between the second terminal of the converter means and at least one of said engine characteristic sensing units, and a third conductor means connected in circuit between the second terminal of the converter means and said generator and including rectifier means connected in series with said third conductor means and arranged so as to be non-conducting to current flow in said third conductor from said generator to said second conductor when the one of said sensiNg units is actuated.
Claim 2
Dependent Claim
212 words
Warning apparatus for a motor vehicle having a battery means, a generator means and a plurality of engine characteristics sensing units, each of said sensing units including switch means constructed and arranged to actuate electric circuit means when the engine characteristic being monitored reaches a certain level, said apparatus comprising: a converter means for converting electrical energy input into audible sound energy, said converter means having two terminals for the input of electrical energy, and said converter means being constructed and arranged for being located in a position in the vehicle where the sound will be audible to the operator of said vehicle, a first conductor means connected in circuit between a first terminal of said converter means and one of the terminals of said battery, a second conductor means connected in circuit between the second terminal of the converter means and at least one of said engine characteristic sensing units, and a third conductor means connected in circuit between the second terminal of the converter means and said generator and including rectifier means connected in series with said third conductor means and arranged so as to be non-conducting to current flow in said third conductor from said generator to said second conductor when the one of said sensiNg units is actuated.
Claim 3
Dependent Claim
55 words
An apparatus as claimed in claim 1 wherein the vehicle engine characteristic sensing units each include warning lights, said generator is equipped with a warning light and wherein the second conductor means is connected to at least one of the sensing units lights and said third conductor means is connected to the generator warning light.
Claim 4
Dependent Claim
111 words
An apparatus as claimed in claim 1 wherein the vehicle is equipped with doors, said apparatus further comprising: a. electrical switch means on each door of said vehicle and means for grounding said switch means when the doors of the vehicle are opened, b. fourth conductor means connected between the second terminal of said converter means and said door switch means, and c. key operated switch means mounted on the exterior of one of said doors and connected in series with said fourth conductor and arranged so as to prevent activation of said converter means through said door operated switches when the key operated switch has been opened by a key.
Claim 5
Dependent Claim
57 words
An apparatus as claimed in claim 1, said electrical circuit means including a first warning light means connected in series with said second conductor means and a second warning light means connected in series with said third conductor means, said warning lights being constructed and arranged so as to be visible to the operator of the vehicle.
Claim 6
Dependent Claim
30 words
An apparatus as claimed in claim 1 wherein an electrical current on-off switch means is connected in series between said second terminal and a transducer forming part of said converter.
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) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |