US3636313A
Expired / Lapsed
US
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High-resolution magnetic clock generator
Assignee: Honeywell Inc
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Filing: 1970-05-06
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Granted: 1972-01-18
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Expires: 1990-05-06
Abstract
Abstract An improved high-resolution magnetic clock generator is disclosed for generating timing pulses particularly useful in combination with an electronic punched card reader for timing or synchronizing the reading and/or transmission of information being stored in uniformly spaced columns of punched cards. A magnetoresistor assembly in combination with a rotating toothed wheel or gear generates two sinusoidally varying electric signals 90* out of phase with each other, said signals being subsequently processed through a circuit means to convert said sinusoidally varying signals to an electric pulse train whose frequency is proportional to wheel speed and independent of wheel eccentricity.
Inventors
- 👤 Ivan N Markowitz
- 👤 Abraham Cherian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:35
CPC Classifications
G; G06; G06F; G06F1/00; G06F1/04; G06K; G06K7/00; G06K7/01; G06K7/016
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
145 words
A high-resolution magnetic clock generator comprising A. a frame; B. a toothed wheel having a plurality of teeth about its periphery said toothed wheel rotatably mounted on said frame; C. a plurality of sensing means responsive to said teeth for generating at least two sinusoidally varying electric signals, said sensing means being disposed in spaced relationship with the teeth of said toothed wheel and being located along the periphery of said toothed wheel, said sensing means also being displaced relative to each other along the periphery of said toothed wheel by a distance of multiples of half the distance between adjacent teeth; D. translating means coupled to said sensing means for converting said sinusoidally varying electric signals into a train of electric pulse signals; E. and output means coupled to said translating means for abstracting said train of electric pulse signals from said translating means.
Claim 2
Dependent Claim
145 words
A high-resolution magnetic clock generator comprising A. a frame; B. a toothed wheel having a plurality of teeth about its periphery said toothed wheel rotatably mounted on said frame; C. a plurality of sensing means responsive to said teeth for generating at least two sinusoidally varying electric signals, said sensing means being disposed in spaced relationship with the teeth of said toothed wheel and being located along the periphery of said toothed wheel, said sensing means also being displaced relative to each other along the periphery of said toothed wheel by a distance of multiples of half the distance between adjacent teeth; D. translating means coupled to said sensing means for converting said sinusoidally varying electric signals into a train of electric pulse signals; E. and output means coupled to said translating means for abstracting said train of electric pulse signals from said translating means.
Claim 3
Dependent Claim
33 words
A high-resolution magnetic clock generator as recited in claim 1 wherein said toothed wheel is composed of a material having low permeability and said teeth are substantially equidimentioned and equidistant from each other.
Claim 4
Dependent Claim
26 words
A high-resolution magnetic clock generator as recited in claim 2 wherein said low-permeability material is selected from the group consisting of soft iron, nickel and cobalt.
Claim 5
Dependent Claim
24 words
A high-resolution magnetic clock generator as recited in Claim 1 wherein said sinusoidally varying electric signals are 90* out of phase with each other.
Claim 6
Dependent Claim
32 words
A high-resolution magnetic clock generator as recited in claim 1 wherein said sinusoidally varying electric signals are an odd multiple of a quarter of a wavelength out of phase with each other.
Claim 7
Dependent Claim
17 words
A high-resolution magnetic clock generator as recited in claim 1 wherein said sensing means comprises a magnetoresistor.
Claim 8
Dependent Claim
55 words
A high-resolution magnetic clock generator as recited in claim 6 wherein said magnetoresistor comprises a bar magnet and at least two Hall electrodes electrically coupled to each other and disposed substantially in one plane, said plane disposed in spatial relationship with one pole of said magnet substantially perpendicular to the magnetic flux of said pole.
Claim 9
Dependent Claim
68 words
An apparatus as recited in claim 7 including coupling means at both ends and at the midpoint of each of said Hall electrodes for introducing or removing electric signals, said coupling means from the midpoint of each of said Hall electrodes to the coupling means at either end of each of said Hall electrodes being separated by a distance equal to one toothed length of said toothed wheel.
Claim 10
Dependent Claim
33 words
A high-resolution magnetic clock generator as recited in claim 8 wherein said Hall electrodes are longitudinally separated one from the other by distance equal to one-half of tooth length of said toothed wheel.
Claim 11
Dependent Claim
19 words
A high-resolution magnetic clock generator as recited in claim 7 wherein the Hall electrodes are comprised of semiconductor material.
Claim 12
Dependent Claim
30 words
A high-resolution magnetic clock generator as recited in claim 10 wherein the semiconductor material is selected from the group consisting of germanium, silicon, indium antimonide, indium arsenide, and gallium arsenide.
Claim 13
Dependent Claim
24 words
A high-resolution magnetic clock generator as recited in claim 1 wherein said translating means comprises an electrical network electrically coupled to said sensing means.
Claim 14
Dependent Claim
76 words
A high-resolution magnetic clock generator as rEcited in claim 12 wherein said electrical network comprises a plurality of differential amplifier means coupled to said sensing means for converting said sinusoidally varying electric signals to square wave electric signals, a plurality of electric pulse generator means coupled to said amplifier means for generating electric pulse signals from said square wave electric signals, and summing means coupled to said pulse generator means for summing said electric pulse signals.
Claim 15
Dependent Claim
41 words
A high-resolution magnetic clock generator as recited in claim 13 wherein a coupling capacitor is electrically connected between said sensing means and said amplifier means for electrically coupling said sensing means to said electrical network and for eliminating low frequency noise.
Claim 16
Dependent Claim
40 words
A high-resolution magnetic clock generator as recited in claim 13 including inverting gate means coupled to said differential amplifier means and to one of said pulse generator means for inverting said square wave to one of said pulse generator means.
Claim 17
Dependent Claim
135 words
In combination with an apparatus for synchronously transferring information from a punched card reader to a data processor, said information being stored in said punched cards in uniformly spaced columns, and comprising a read station responsive to said stored information on said punched cards, rotatable punched-card feed capstan rolls for transporting successive punched cards past said read station, and means for rotating said capstan rolls, the improvement which comprises: A. a toothed wheel having a multiplicity of teeth about its circumference, said toothed wheel rotatably mounted on said apparatus for synchronous rotation with said capstan rolls; B. sensing means responsive to said teeth for generating at least two sinusoidally varying electric signals; C. and translating means coupled to said sensing means for converting said sinusoidally varying electric signals into a train of electric pulse signals.
Claim 18
Dependent Claim
135 words
In combination with an apparatus for synchronously transferring information from a punched card reader to a data processor, said information being stored in said punched cards in uniformly spaced columns, and comprising a read station responsive to said stored information on said punched cards, rotatable punched-card feed capstan rolls for transporting successive punched cards past said read station, and means for rotating said capstan rolls, the improvement which comprises: A. a toothed wheel having a multiplicity of teeth about its circumference, said toothed wheel rotatably mounted on said apparatus for synchronous rotation with said capstan rolls; B. sensing means responsive to said teeth for generating at least two sinusoidally varying electric signals; C. and translating means coupled to said sensing means for converting said sinusoidally varying electric signals into a train of electric pulse signals.
Claim 19
Dependent Claim
14 words
The combination as recited in claim 16 wherein said sensing means comprise a magnetoresistor.
Claim 20
Dependent Claim
113 words
The combination as recited in claim 17 wherein said magnetoresistor comprises a bar magnet at least two Hall electrodes electrically coupled to each other and disposed substantially in one plane, said plane disposed in spatial relationship with one pole of said magnet substantially perpendicular to the magnetic flux of said pole, and including coupling means at both ends and at the midpoint of each of said Hall electrodes for introducing or removing electric signals, said coupling means from the midpoint of each of said Hall electrodes to the coupling means at either end of each of said Hall electrodes being separated by a distance equal to one tooth length of said toothed wheel.
Claim 21
Dependent Claim
31 words
The combination as recited in claim 18 wherein said Hall electrodes are longitudinally separated one from the other by a distance equal to one-half a tooth length of said toothed wheel.
Claim 22
Dependent Claim
21 words
The combination as recited in claim 16 wherein said translating means comprises an electrical network electrically coupled to said sensing means.
Claim 23
Dependent Claim
73 words
The combination as recited in claim 20 wherein said electrical network comprises a plurality of differential amplifier means coupled to said sensing means for converting said sinusoidally varying electric signals to square wave electric signals, a plurality of electric pulse generator means coupled to said amplifier means for generating electric pulse signals from said square wave electric signals, and summing means coupled to said pulse generator means for summing said electric pulse signals.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |