Patent US5268699A successfully refreshed from Google Patents.
US3666039A
Expired / Lapsed
US
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Arrangement for detecting sliding and slippage of vehicle wheels
Assignee: Robert Bosch GmbH
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Filing: 1970-07-06
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Granted: 1972-05-30
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Expires: 1990-07-06
Abstract
Abstract A generator wheel turning with the vehicle wheel forms a magnetic circuit with a core and coil, the air gap between the core and generator wheel varying constantly during rotation of the latter so as to produce an alternating voltage in the coil, which is fed a direct current from a constant current source.
Inventors
- 👤 Karl Bachle
- 👤 Jurgen Knorr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:49
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/17; B60T8/172; B60T8/32; B60T8/321; B60T8/329; G; G01; G01P; G01P3/00; G01P3/42; G01P3/44; G01P3/48; G01P3/481; G01P3/488
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
165 words
An arrangement for detecting slipping and sliding with respect to the road surface of the wheels of a vehicle, comprising pulse generator means associated with at least one vehicle wheel for producing pulses at a rate dependent on the circumferential speed of the wheel and including a magnetic circuit comprising a core of electromagnetizable material; means for periodically varying the reluctance of said magnetic circuit with a frequency proportional to the circumferential speed of said vehicle wheel; and combined excitation and speed-signal furnishing means comprising a single coil surrounding a part of said core and having two terminals, and a constant current source connected to at least one of said terminals and supplying a substantially constant current to said coil, so that, due to said varying of the reluctance of said magnetic circuit periodically with a frequency proportional to the speed of said vehicle wheel, electrical pulses wiLl appear at said terminal of said coil with a spacing indicative of whether skidding is taking place.
Claim 2
Dependent Claim
165 words
An arrangement for detecting slipping and sliding with respect to the road surface of the wheels of a vehicle, comprising pulse generator means associated with at least one vehicle wheel for producing pulses at a rate dependent on the circumferential speed of the wheel and including a magnetic circuit comprising a core of electromagnetizable material; means for periodically varying the reluctance of said magnetic circuit with a frequency proportional to the circumferential speed of said vehicle wheel; and combined excitation and speed-signal furnishing means comprising a single coil surrounding a part of said core and having two terminals, and a constant current source connected to at least one of said terminals and supplying a substantially constant current to said coil, so that, due to said varying of the reluctance of said magnetic circuit periodically with a frequency proportional to the speed of said vehicle wheel, electrical pulses wiLl appear at said terminal of said coil with a spacing indicative of whether skidding is taking place.
Claim 3
Dependent Claim
22 words
A combination as defined in claim 1, in combination with means for regulating the driving force of motor vehicle wheels on tracks.
Claim 4
Dependent Claim
35 words
A combination as defined in claim 1, including brake means for the vehicle wheel, and means responsive to pulses generated by said pulse generator means to release said brake means upon absence of a pulse.
Claim 5
Dependent Claim
18 words
A combination as defined in claim 1, including means for adjusting the current of said constant current source.
Claim 6
Dependent Claim
91 words
A combination as defined in claim 1, said constant current source having transistor means having an output path with first and second terminals and a control electrode, a constant voltage source having first and second terminals of which said first terminal is connected to said control electrode, resistance means having first and second terminals of which said first terminal is connected to said first output path terminal and said second terminal is connected to said second constant voltage source terminal, said coil means being connected to said second output path terminal.
Claim 7
Dependent Claim
13 words
A combination as defined in claim 5, wherein said resistance means is adjustable.
Claim 8
Dependent Claim
17 words
A combination as defined in claim 5, wherein said resistance means is part of a controlled system.
Claim 9
Dependent Claim
25 words
A combination as defined in claim 1, in combination with means for regulating the braking force applied to at least one wheel of a vehicle.
Claim 10
Dependent Claim
81 words
An arrangement as defined in claim 1, wherein said core has a pair of spaced ends, said magnetic circuit further comprising generator wheel means of electrically conductive material rotatable with said vehicle wheel and having at least one portion positioned opposite at lease one of said spaced ends, said portions including at least one first geometric irregularity which, during rotation of said generator wheel, will pass into and out of said magnetic circuit, and thereby vary the reluctance of said circuit.
Claim 11
Dependent Claim
22 words
A combination as defined in claim 9, wherein a circumferential portion of the generator wheel means has a plurality of said irregularities.
Claim 12
Dependent Claim
33 words
A combination as defined in claim 10, wherein at least said circumferential portion comprises material of high magnetic retentivity that is magnetized with alternating poles in the direction of said one core end.
Claim 13
Dependent Claim
34 words
A combination as defined in claim 10, wherein at least one of said spaced ends has a plurality of second geometric irregularities corresponding to and cooperating with said at least one first geometric irregularity.
Claim 14
Dependent Claim
24 words
A combination as defined in claim 12, wherein at least a circumferential part of said generator wheel means comprises material of high magnetic permeability.
Claim 15
Dependent Claim
19 words
A combination as defined in claim 13, wherein the irregularities of said circumferential portion consist of regularly spaced recesses.
Claim 16
Dependent Claim
15 words
A combination as defined in claim 12, wherein said second irregularities are regularly spaced recesses.
Claim 17
Dependent Claim
28 words
A combination as defined in claim 9, wherein said core is yoke-shaped and each of said ends is positioned opposite a circumferential part of the generator wheel means.
Claim 18
Dependent Claim
24 words
A combination as defined in claim 16, wherein said spaced core ends are aligned and located on opposite sides of said generator wheel means.
Claim 19
Dependent Claim
22 words
A combination as defined in claim 9, wherein said at least one core end is positioned radially opposite said generator wheel means.
Claim 20
Dependent Claim
38 words
A combination as defined in claim 9, wherein said generator wheel means defines an axis of rotation and said at least one core end is positioned opposite said generator wheel means along a line parallel to said axis.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |