Patent US3712283A successfully refreshed from Google Patents.
US3712283A
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Safety arrangement for starting motor in internal combustion engines
Assignee: Robert Bosch GmbH
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Filing: 1971-09-07
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Granted: 1973-01-23
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Expires: 1991-09-07
Abstract
Abstract First pulses sequence has repetition rate varying as a function of engine speed. Each pulse is extended in time by a predetermined time interval. The so-extended pulses and the original pulses each applied at one input of an AND gate which furnishes an output when the interval between pulses of the pulse sequence is shorter than the predetermined time interval. Output of AND gate de-energizes starting motor. Starting motor also deenergized for a predetermined time period following deenergization. regardless of speed of engine.
Inventors
- 👤 A Kiess
- 👤 P Gunsser
- 👤 E Kuhn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:58
CPC Classifications
F; F02; F02N; F02N11/00; F02N11/08; F02N11/0848; H; H02; H02H; H02H7/00; H02H7/08; H02H7/09; H02H7/093; F02N11/10; F02N11/101; F02N11/105
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
165 words
In an internal combustion engine having starting means and energizing means energizing said starting means upon external activation, an arrangement for de-energizing said starting means when the rotational speed of said engine exceeds a predetermined speed, comprising, in combination, pulse furnishing means furnishing a first pulse sequence, the pulse interval between consecutive ones of said pulses varying as a function of engine speed; timing means connected to said pulse furnishing means for furnishing a timing signal in response to eachof said pulses of said firstpulse sequence, each of said timing signals extending a predetermined time interval following the end of the corresponding one of said first pulses; first logic means having a fIrst input connected to said pulse furnishing means, a second input connected to said timing means, and an output, for furnishing a logic signal at said output in the simultaneous presence of a signal at said first and second inputs; and deenergizing means de-energizing said starting means upon receipt of said logic signal.
Claim 2
Dependent Claim
165 words
In an internal combustion engine having starting means and energizing means energizing said starting means upon external activation, an arrangement for de-energizing said starting means when the rotational speed of said engine exceeds a predetermined speed, comprising, in combination, pulse furnishing means furnishing a first pulse sequence, the pulse interval between consecutive ones of said pulses varying as a function of engine speed; timing means connected to said pulse furnishing means for furnishing a timing signal in response to eachof said pulses of said firstpulse sequence, each of said timing signals extending a predetermined time interval following the end of the corresponding one of said first pulses; first logic means having a fIrst input connected to said pulse furnishing means, a second input connected to said timing means, and an output, for furnishing a logic signal at said output in the simultaneous presence of a signal at said first and second inputs; and deenergizing means de-energizing said starting means upon receipt of said logic signal.
Claim 3
Dependent Claim
48 words
An arrangement as set forth in claim 1, wherein said starting means comprise a starting motor having a winding; and wherein said energizing means comprise a source of electrical energy, and switching means connecting said winding of said starting motor to said source of electrical energy when closed.
Claim 4
Dependent Claim
52 words
An arrangement as set forth in claim 2, further comprising first hold means interconnected between said logic means and said de-energizing means, for furnishing an extended logic signal in response to each of said logic signals, said extended logic signal having a width in time exceeding the width of said logic signal.
Claim 5
Dependent Claim
52 words
An arrangement as set forth in claim 2, wherein said de-energizing means comprise additional switching means having a quiescent state connecting said winding of said starting motor to said source of electrical energy and an activated state disconnecting said winding from said source of electrical energy, in response to said logic signal.
Claim 6
Dependent Claim
27 words
An arrangement as set forth in claim 4, wherein said additional switching means comprise relay means having a pair of normally closed contacts and a relay coil.
Claim 7
Dependent Claim
23 words
An arrangement as set forth in claim 3, further comprising first pulse forming means connected to the output of said pulse furnishing means.
Claim 8
Dependent Claim
18 words
An arrangement as set forth in claim 6, wherein said first pulse forming means comprise monostable circuit means.
Claim 9
Dependent Claim
39 words
An arrangement as set forth in claim 6, wherein said timing means comprise second monostable circuit means; further comprising inverter means connecting the output of said first pulse forming means to the input of said second monostable circuit means.
Claim 10
Dependent Claim
44 words
An arrangement as set forth in claim 8, wherein said logic means comprise an AND gate having a first input connected to the output of said second monostable circuit means and a second input connected to the output of said first pulse forming means.
Claim 11
Dependent Claim
22 words
An arrangement as set forth in claim 9, further comprising second pulse forming means connected to the output of said AND gate.
Claim 12
Dependent Claim
59 words
An arrangement as set forth in claim 2, wherein said source of electrical energy is a D.C. source; further comprising second hold means connected to said winding of said starting means for furnishing a second hold signal in response to de-energization of said winding; and connecting means connecting the output of said second hold means to said de-energizing means.
Claim 13
Dependent Claim
44 words
An arrangement as set forth in claim 11, wherein said connecting means comprise OR gate means having a first input connected to said second hold means, a second input connected to said logic means and an OR gate output connected to said de-energizing means.
Claim 14
Dependent Claim
17 words
An arrangement as set forth in claim 3, wherein said first hold means comprise Miller integrator means.
Claim 15
Dependent Claim
17 words
An arrangement as set forth in claim 11, wherein said second hold means comprise Miller integrator means.
Claim 16
Dependent Claim
41 words
An arrangement as set forth in claim 14, further comprising differentiating circuit means connected to the input of said Miller integrator means and furnishing a positive impulse upon energization of said winding and a negative impulse upon de-energization of said winding.
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) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |