US3930201A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulse source to provide a pulse train representative of movement of a shaft and a reference pulse representative of a reference position
Assignee: Robert Bosch GmbH
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Filing: 1974-09-27
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Granted: 1975-12-30
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Expires: 1994-09-27
Abstract
Abstract Transducer elements, such as the teeth of a star-wheel are uniformly distributed around the circumference of a disk; one of the teeth is slit to form a double tooth with a gap therebetween, the two-part teeth and the gap, each, taking one third of the space of a tooth; and a circuit, such as a counter counting at a rate much faster than the pulse repetition rate of the pulse source counts forwardly when sensing a tooth, and backwardly when sensing a gap, so that the count state of the counter, after a tooth-gap count will be zero, except when counting backward after the second part-tooth throughout the length of the normal-size gap, the non-zero count state of the counter being sensed by a threshold detector and providing a signal upon presence of the next tooth, so that a reference signal, at a predetermined tooth position, will be provided as well as the pulses representative of the passage of each one of the teeth.
Inventors
- 👤 Fritz Ackermann
- 👤 Gunter Honig
- 👤 Alfred Schulz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:27
CPC Classifications
G; G01; G01P; G01P3/00; G01P3/42; G01P3/44; G01P3/48; G01P3/481; G01P3/488; F; F02; F02P; F02P5/00; F02P5/04; F02P5/145; F02P5/15; F02P7/00; F02P7/06; F02P7/067; F02P7/0675; F02P7/077; F02P7/0775; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/40
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
164 words
A pulse source to provide a pulse signal train representative of movement of a movable element (11) and a reference pulse signal when the movable element is in a predetermined reference position, having a transducer system including a plurality of transducer elements (12, 13, 16) located on the movable element (11) and a transducer receiver (14) located in energy transfer coupling with respect to said plurality of elements, and providing said signals upon passage of the transducer elements past the receiver, wherein the transducer elements comprise projecting teeth (12) separated by gaps (13) to provide a sequence of pulses in the transducer receiver (14) having a 1:1 sensing relationship of elements and resulting pulses; and wherein one of the transducer elements (16) is shaped differently from the others (12) and comprises a group of tooth portions (20, 22) separated by gaps (21), located within the space of any other tooth (12) and in advance of that transducer element (12'') which provides the reference pulse.
Claim 2
Dependent Claim
164 words
A pulse source to provide a pulse signal train representative of movement of a movable element (11) and a reference pulse signal when the movable element is in a predetermined reference position, having a transducer system including a plurality of transducer elements (12, 13, 16) located on the movable element (11) and a transducer receiver (14) located in energy transfer coupling with respect to said plurality of elements, and providing said signals upon passage of the transducer elements past the receiver, wherein the transducer elements comprise projecting teeth (12) separated by gaps (13) to provide a sequence of pulses in the transducer receiver (14) having a 1:1 sensing relationship of elements and resulting pulses; and wherein one of the transducer elements (16) is shaped differently from the others (12) and comprises a group of tooth portions (20, 22) separated by gaps (21), located within the space of any other tooth (12) and in advance of that transducer element (12'') which provides the reference pulse.
Claim 3
Dependent Claim
39 words
Pulse source according to claim 1, wherein the differently shaped transducer element (16) comprises two tooth portions (20, 22) and one intervening gap (21), the tooth portions and gap, each, having 1/3 the width of any other tooth (12).
Claim 4
Dependent Claim
88 words
Pulse source according to claim 1, further comprising a counter (17) and a clock source (18) having a clock rate which is high with respect to the pulse repetition of the pulse signals, the counter being connected to count forwardly during occurrence of the pulses and to count backwardly during pulse gaps, to result in a count state of zero, or approximately zero when the sensing relationship is 1:1, but to result in a count state substantially differing from zero after the differently shaped transducer element was sensed.
Claim 5
Dependent Claim
51 words
Pulse source according to claim 3, further comprising a conjunctive gate (AND-26) connected to the counter (17) and the transducer receiver (14) and providing said reference pulse upon conjunction of: (a) counter state substantially different from zero; and (b) the next transducer element (12'') being sensed by the transducer receiver (14).
Claim 6
Dependent Claim
85 words
Pulse source according to claim 4, further comprising a comparator circuit (24) and a threshold circuit (23) connected thereto and storing a predetermined count state representative of deviation of count state from zero in backward direction of the counter and indicative of count of the counter after the last transducer element (22) of different shape has been sensed, the comparator circuit (24) being connected to the counter output and providing an output therefrom to said conjunctive gate (26) when the stored count threshold is exceeded.
Claim 7
Dependent Claim
45 words
Pulse source according to claim 5, further comprising a bistable circuit (25) connected between the comparator circuit (24) and the conjunctive gate (26) and changing state when an output is received from the comparator circuit; and circuit means resetting the bistable circuit and the counter.
Claim 8
Dependent Claim
22 words
Pulse source according to claim 3, further comprising a wave-shaping circuit (15) connected between the transducer receiver (14) and the counter (17).
Claim 9
Dependent Claim
111 words
Pulse source according to claim 1, wherein the movable element is a shaft (11) and the predetermined reference position is a predetermined angular position of the shaft; and the transducer elements comprise a disk (10) formed with the teeth and gaps at the circumference thereof in non-contacting energy coupled relation to the transducer receiver (14) which, except for said transducer element (16) of different shape, regularly alternate between two characteristics to provide a pulse sequence of regularly recurring pulses spaced by regularly recurring pulse gaps upon rotation of said shaft, and a different pulse sequence and gap length only when the transducer element of different shape (16) passes a transducer receiver.
Claim 10
Dependent Claim
93 words
Pulse source according to claim 8, wherein the differently shaped transducer element (16) comprises two tooth portions (20), 22) and an intervening gap (21), said tooth portions and gap each being 1/3 the width of any other tooth (12); and circuit means are provided generating a forward signal upon sensing one characteristic of the transducer element and a reverse signal upon sensing of the other characteristic thereof, so that the signals will cancel when the two characteristics substantially balance but will result in a net signal upon unbalance; and means sensing said unbalance.
Claim 11
Dependent Claim
46 words
Pulse source according to claim 1, wherein the movable element is a shaft (11), the plurality of transducer elements comprises a star-wheel (10) having the alternating projecting teeth (12, 16) and gaps (13) therebetween; and the transducer receiver senses the presence of teeth, and gaps, respectively.
References Cited (Backward Citations)
US2656106A
Cited
US3696303A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |