Patent US3659263A successfully refreshed from Google Patents.
US3659263A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wheel slip detection device
Assignee: Robert Bosch GmbH
•
Filing: 1969-11-24
•
Granted: 1972-04-25
•
Expires: 1989-11-24
Abstract
Abstract To detect transition from rolling to sliding of a wheel over a surface, a transducer coupled to the wheel provides output pulses having a repetition rate representative of wheel speed. The pulses are applied to a logic circuit including a pair of multivibrators, one of which has a variable time circuit setting its unstable state in dependence on pulse repetition rate; the rate itself is sensed by applying the pulses from the two multivibrators to a coincidence gate which activates a wheel slip detector (and, if desired, an override control to a brake, or accelerating arrangement for the wheel).
Inventors
- 👤 Peter Gunsser
- 👤 Klaus H Christ
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:46
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/32; B60T8/72; B60L; B60L3/00; B60L3/10; B60T8/17; B60T8/172; B60T8/321; B60T8/329; G; G01; G01P; G01P15/00; G01P3/00; G01P3/42; G01P3/44; G01P3/48; G01P3/4802; G01P3/50; B60L2200/00; B60L2200/26
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
159 words
Slip detection device to detect transition from rolling to slipping of a wheel (11) over a surface (12) upon acceleration or deceleration of the wheel comprising: transducer means (18) coupled to the wheel and providing output pulses (118) having a repetition rate representative of wheel speed; a first monostable multivibrator (28); a second monostable multivibrator (31); the pulses (118) being connected to trigger said first monostable multivibrator (28) and to trigger said second monostable multivibrator (31); means (32) connected to and controlling the unstable time of said second monostable multivibrator to be representative of elapsed time between pulses applied thereto; means sensing change of elapsed time between pulses exceeding a predetermined amount of change, including a coincidence circuit (29) having the output of said first monostable multivibrator (28) applied to one input thereof and the output of said second monostable multivibrator (31) applied to a second input thereof; and means (33) deriving an output signal from said sensing means.
Claim 2
Dependent Claim
159 words
Slip detection device to detect transition from rolling to slipping of a wheel (11) over a surface (12) upon acceleration or deceleration of the wheel comprising: transducer means (18) coupled to the wheel and providing output pulses (118) having a repetition rate representative of wheel speed; a first monostable multivibrator (28); a second monostable multivibrator (31); the pulses (118) being connected to trigger said first monostable multivibrator (28) and to trigger said second monostable multivibrator (31); means (32) connected to and controlling the unstable time of said second monostable multivibrator to be representative of elapsed time between pulses applied thereto; means sensing change of elapsed time between pulses exceeding a predetermined amount of change, including a coincidence circuit (29) having the output of said first monostable multivibrator (28) applied to one input thereof and the output of said second monostable multivibrator (31) applied to a second input thereof; and means (33) deriving an output signal from said sensing means.
Claim 3
Dependent Claim
24 words
Device according to claim 1, wherein the pulses applied to the input of said second multivibrator (31) are connected through said first multivibrator (28).
Claim 4
Dependent Claim
44 words
Device according to claim 1, wherein the means connected to and controlling the unstable time of the second monostable multivibrator (31) comprises an integrating network having the pulses from said first multivibrator (28) applied thereto and controlling the unstable period of said second multivibrator.
Claim 5
Dependent Claim
47 words
Device according to claim 1, in combination with a vehicle braking system, said means (33) deriving an output signal being connected to the vehicle braking system and supplying a control signal thereto upon detection of change of elapsed time between pulses in excess of a predetermined value.
Claim 6
Dependent Claim
62 words
Device according to claim 1, wherein said transducer means includes a magnetic transducer wheel mechanically coupled to said wheel (11), said transducer wheel having intermittently magnetic material located along its circumference; and a yoke cooperating with said intermittent magnetic material, and a coil associated therewith, said coil having pulses induced therein upon rotation of said transducer wheel with respect to said yoke.
Claim 7
Dependent Claim
33 words
Device according to claim 5, wherein said transducer wheel comprises a plurality of magnets located at the circumference thereof, and of adjacent opposite polarity, and located in a magnetic circuit with said yoke.
Claim 8
Dependent Claim
29 words
Device according to claim 5, wherein said transducer wheel comprises a plurality of salient poles of ferromagnetic material and said coil is connected to a source of direct current.
Claim 9
Dependent Claim
49 words
Device according to claim 1, wherein said transducer means includes an optical transducer having a source of light and a light-sensitive element, and a movable reflector secured to rotate with said wheel (11) and reflecting light from said source to said photosensitive element, intermittently, upon rotation of said wheel.
Claim 10
Dependent Claim
77 words
Device according to claim 1, wherein said means connected to and controlling the unstable time of the second monostable multivibrator (31) includes an integrating circuit (32) having pulses with a repetition rate proportional to the repetition rate of said output pulses applied thereto and providing an electrical representation of average elapsed time between pulses; and said coincidence circuit (29) is connected to compare the elapsed time between adjacent pulses with said electrical representation of averaged elapsed time.
Claim 11
Dependent Claim
50 words
Device according to claim 1, in combination with a vehicle driving system (15'', 16'', 17''), said means (33'') deriving an output signal being connected to the vehicle driving system and supplying a control signal thereto upon detection of increase of repetition rate of pulses in excess of a predetermined value.
Claim 12
Dependent Claim
159 words
Device according to claim 4, further in combination with a vehicle driving system and Having a pair of second multivibrators (31, 31''), a pair of integrating circuits (32, 32'') forming a pair of means controlling a respective second multivibrator (31, 31'') and each having pulses with a repetition rate proportional to the repetition rate of said output pulses applied thereto, each said integrating circuit providing an electrical representation of average elapsed time between pulses; and said means sensing change of elapsed time between pulses including a pair of coincidence circuits (29, 29'') each having the output of the first multivibrator (28) and a respective second multivibrator (31, 31'') applied thereto and each comparing elapsed time between adjacent pulses with said electrical representation of average elapsed time, one coincidence circuit providing a first output signal when said comparison exceeds a certain value and the other coincidence circuit providing a second output signal when said comparison drops below a predetermined value.
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) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |