US3877003A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Warning system for belt slippage
Assignee: Soken Inc
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Filing: 1973-08-29
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Granted: 1975-04-08
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Expires: 1993-08-29
Abstract
Abstract A shaft revolution detector detects the number of revolutions of the engine shaft of a vehicle engine, a driven member revolution detector for detecting the number of revolutions of a driven rotary member connected to the engine shaft through a belt, a circuit compares the detected signals of the driven member revolution detector and the shaft revolution detector, and actuates a warning circuit when the output signal of the comparator circuit reaches a predetermined value.
Inventors
- 👤 Isamu Kawashima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:30
CPC Classifications
G; G01; G01P; G01P3/00; G01P3/42; G01P3/44; G01P3/48; G01P3/481; G01P3/489; G01P3/56; G01P3/60; G01R; G01R23/00; G01R23/005; H; H03; H03K; H03K5/00; H03K5/22; H03K5/26
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
204 words
A warning system for belt slippage comprising a first revolution detector means for detecting the number of revolutions of a first rotary member, a second revolution detector means for detecting the number of revolutions of a second rotary member connected to said first rotary member through a belt for transmitting the rotation of said first rotary member, comparator means for comparing the detected signals of said first revolution detector and said second revolution detector said comparator means comprising first circuit means for accumulating a count of the detection signals from said first revolution detector to produce a repetition signal each time the accumulated value reaches a preset value, second circuit means for accumulating a count of the detection signals from said second revolution detector in response to said repetition signal from said first circuit and logic means for producing a first signal when the accumulated count in said second circuit means exceeds a predetermined value and a second signal when the count in said second circuit means is less than said predetermined value, and warning means for giving a warning when one of said signals is produced by said logic means and not giving a warning when the other of said signals is produced.
Claim 2
Dependent Claim
204 words
A warning system for belt slippage comprising a first revolution detector means for detecting the number of revolutions of a first rotary member, a second revolution detector means for detecting the number of revolutions of a second rotary member connected to said first rotary member through a belt for transmitting the rotation of said first rotary member, comparator means for comparing the detected signals of said first revolution detector and said second revolution detector said comparator means comprising first circuit means for accumulating a count of the detection signals from said first revolution detector to produce a repetition signal each time the accumulated value reaches a preset value, second circuit means for accumulating a count of the detection signals from said second revolution detector in response to said repetition signal from said first circuit and logic means for producing a first signal when the accumulated count in said second circuit means exceeds a predetermined value and a second signal when the count in said second circuit means is less than said predetermined value, and warning means for giving a warning when one of said signals is produced by said logic means and not giving a warning when the other of said signals is produced.
Claim 3
Dependent Claim
59 words
A warning system according to claim 1 wherein said warning means comprises a converter circuit means for storing the first and second signals and causing the conversion of the stored signal to occur in synchronism with the repetition signal, and a warning circuit for generating and removing a warning in response to the stored signal in said converter circuit.
Claim 4
Dependent Claim
141 words
A warning system for belt slippage comprising: first revolution detector means for generating a pulse signal of a frequency proportional to the r.p.m. of a first rotary member, second revolution detector means for generating a pulse signal of a frequency proportional to the r.p.m. of a second rotary member linked through a belt to transmit the rotation of said first rotary member, frequency divider circuit means for repetitively frequency dividing the pulse signal from said first revolution detector by a constant factor, counter circuit means for counting the pulse signal from said second revolution detector for each cycle of the output signal of said frequency divider circuit and determining whether the count thereof is at least equal to a predetermined value or not, and warning means responsive to the determination result of the counter circuit for generating and removing a warning.
Claim 5
Dependent Claim
141 words
A warning system for belt slippage comprising: first revolution detector means for generating a pulse signal of a frequency proportional to the r.p.m. of a first rotary member, second revolution detector means for generating a pulse signal of a frequency proportional to the r.p.m. of a second rotary member linked through a belt to transmit the rotation of said first rotary member, frequency divider circuit means for repetitively frequency dividing the pulse signal from said first revolution detector by a constant factor, counter circuit means for counting the pulse signal from said second revolution detector for each cycle of the output signal of said frequency divider circuit and determining whether the count thereof is at least equal to a predetermined value or not, and warning means responsive to the determination result of the counter circuit for generating and removing a warning.
Claim 6
Dependent Claim
62 words
A warning system according to claim 3 wherein said warning means comprising converter circuit means for storing the result of the determination by said second circuit and causing the conversion of the stored signal to occur in synchronism with the repetition signal, and warning circuit means for generating and removing a warning in response to the stored singal in said converter circuit.
References Cited (Backward Citations)
US3581277A
Cited
US3673400A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |