US3681658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for protecting a starting motor of an internal combustion engine
Assignee: Hitachi Ltd
•
Filing: 1970-12-03
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Granted: 1972-08-01
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Expires: 1990-12-03
Abstract
Abstract A device for protecting a starting motor for an internal combustion engine prevents misoperation of the starting motor. A normally opened contact which is closed by the output voltage of a generator is connected in an ignition circuit connected at an end thereof with a battery, and a normally closed contact which is opened by the output voltage of the generator is connected in a starting motor switch circuit, so that the ignition circuit is closed and the starting motor switch circuit is opened when the output voltage of the generator is above a definite level.
Inventors
- 👤 Keigo Naoi
- 👤 Katumi Otuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:25
CPC Classifications
F; F02; F02N; F02N11/00; F02N11/10; F02N11/101; F02N11/105; F02B; F02B1/00; F02B1/02; F02B1/04
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
210 words
A device for protecting a starting means in an internal combustion engine comprising: a. a charging circuit including a charging generator consisting of three dynamo coils in Y-connection and a field coil; b. a battery being connected to the output terminal of said charging generator through a rectifier circuit; c. an ignition switch being connected between said battery and an ignition load, d. an indicator lamp being connected between said ignition switch and a voltage regulator circuit which is connected to said field coil; e. a first set of normally open contacts connected in parallel with said indicator lamp; f. a starting switch connected between said battery and a second set of normally closed contacts, which is connected to a voltage coil of a starting motor circuit and to a voltage detecting coil, and wherein g. said voltage detecting coil is connected between said second set of normally closed contacts and a cathode of a diode, an anode of said diode being connected to the neutral point of said dynamo coils of said generator, and wherein said voltage detecting coil is coupled to said first and second sets of contacts, so as to respectively close and open said sets in response to the detection of a voltage from said diode.
Claim 2
Independent Claim
210 words
A device for protecting a starting means in an internal combustion engine comprising: a. a charging circuit including a charging generator consisting of three dynamo coils in Y-connection and a field coil; b. a battery being connected to the output terminal of said charging generator through a rectifier circuit; c. an ignition switch being connected between said battery and an ignition load, d. an indicator lamp being connected between said ignition switch and a voltage regulator circuit which is connected to said field coil; e. a first set of normally open contacts connected in parallel with said indicator lamp; f. a starting switch connected between said battery and a second set of normally closed contacts, which is connected to a voltage coil of a starting motor circuit and to a voltage detecting coil, and wherein g. said voltage detecting coil is connected between said second set of normally closed contacts and a cathode of a diode, an anode of said diode being connected to the neutral point of said dynamo coils of said generator, and wherein said voltage detecting coil is coupled to said first and second sets of contacts, so as to respectively close and open said sets in response to the detection of a voltage from said diode.
Claim 3
Dependent Claim
192 words
A device for protecting a starting means in an internal combustion engine as claimed in claim 1, wherein an iron core for said voltage detecting coil, fixed contacts of said first and second sets and a mounting means are all mounted on a common supporting bracket, said iron core being placed between said fixed contacts of the first and second sets and said fixed contacts of said second set being placed between said iron core and said mounting means; an angular part of an L shape armature is fixed on the top of said mounting means through an elastic plate, a first end of said armature being extended over said iron core and a second end thereof being extended between the iron core and the mounting means; a movable contact of said first set is placed on the first end of said armature facing said fixed contact of said first set; a movable contact of said second set is placed on the second end of said armature facing to said fixed contact of said second set; and said two movable contacts of said first and second set are insulated from each other.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |