Patent US3567839A successfully refreshed from Google Patents.
Patent US3916277A successfully refreshed from Google Patents.
US3916277A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Timing device
Assignee: Tri Tech Inc
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Filing: 1969-06-30
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Granted: 1975-10-28
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Expires: 1989-06-30
Abstract
Abstract A time base frequency source and motor speed control comprising a rotating permanently magnetized driving magnet which is loosely magnetically coupled to a balance wheel also permanently magnetized and mounted about an axis adjacent the driving magnet so as to oscillate at a predetermined natural frequency in response to rotation of the magnet. The device also includes a signal coil adjacent the balance wheel, for generating an electrical signal representative of the frequency of the oscillations of the balance wheel and means for controlling the speed of rotation of the driving magnet and for controlling other devices in accordance with such frequency.
Inventors
- 👤 Arthur W Haydon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:53
CPC Classifications
H; H02; H02P; H02P8/00; H02P8/14; H02K; H02K11/00; H02K11/01; H02K11/014; H02K11/0141; H02K11/30; H02K11/33; Y; Y10; Y10S; Y10S388/00; Y10S388/90; Y10S388/902
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
162 words
A device comprising a stepper motor having a rotor which forms a permanently magnetized driving member, means for applying d.c. pulses to said stepper motor to rotate said member, a permanently magnetized balance member rotatably mounted about its central axis adjacent but spaced from said driving member and forming a magnetic coupling therewith which causes said balance member to tend to rotate about said axis in response to rotation of said driving member, means cooperating with said balance member for limiting the motion thereof so that said balance member oscillates at a predetermined natural frequency in response to rotation of said driving member, and a feedback system which controls the pulse applying means in accordance with the frequency of the oscillations of said balance member, said feedback system including means for generating an electrical signal in accordance with the oscillations of said balance member and means responsive to the frequency of said signal for controlling the rotation speed of said driving member.
Claim 2
Independent Claim
162 words
A device comprising a stepper motor having a rotor which forms a permanently magnetized driving member, means for applying d.c. pulses to said stepper motor to rotate said member, a permanently magnetized balance member rotatably mounted about its central axis adjacent but spaced from said driving member and forming a magnetic coupling therewith which causes said balance member to tend to rotate about said axis in response to rotation of said driving member, means cooperating with said balance member for limiting the motion thereof so that said balance member oscillates at a predetermined natural frequency in response to rotation of said driving member, and a feedback system which controls the pulse applying means in accordance with the frequency of the oscillations of said balance member, said feedback system including means for generating an electrical signal in accordance with the oscillations of said balance member and means responsive to the frequency of said signal for controlling the rotation speed of said driving member.
Claim 3
Dependent Claim
21 words
A device according to claim 1 wherein at least one of said driving members and said balance member comprises ferrite material.
Claim 4
Dependent Claim
25 words
A device according to claim 1 wherein the means for limiting the motion of the balance member comprises spring means connected to said balance member.
Claim 5
Dependent Claim
35 words
A device according to claim 3 wherein said spring means comprises a temperature compensated hair spring and there are means for tuning said hair spring to oscillate said balance member at said predetermined natural frequency.
Claim 6
Dependent Claim
36 words
A device according to claim 1 wherein said driving member has a rotating shaft which provides a mechanical output the rotational speed of which is controlled by the frequency of the oscillations of said balance member.
Claim 7
Dependent Claim
36 words
A device according to claim 5 wherein there is a generator and the mechanical output of said shaft is coupled to said generator for generating an electrical output which comprises a constant frequency alternating current waveform.
Claim 8
Dependent Claim
38 words
A device according to claim 1 wherein there is an alternating current generator connected to said rotor for generating an alternating current waveform the frequency of which is controlled by the rate of rotation of said rotating means.
Claim 9
Independent Claim
172 words
A device comprising a stepper motor having a rotor which forms a permanently magnetized driving member, means for applying d.c. pulses to said stepper motor to rotate said member, a permanently magnetized balance member rotatably mounted about its central axis adjacent but spaced from said driving member and forming a magnetic coupling therewith which causes said balance member to tend to rotate about said axis in response to rotation of said driving member, said driving member being mounted coaxially with said balance member, means cooperating with said balance member for limiting the motion thereof so that said balance member oscillates at a predetermined natural frequency in response to rotation of said driving member, and a feedback system which controls the pulse applying means in accordance with the frequency of the oscillations of said balance member, said feedback system including means for generating an electrical signal in accordance with the oscillations of said balance member and means responsive to the frequency of said signal for controlling the rotation speed of said driving member.
Claim 10
Independent Claim
172 words
A device comprising a stepper motor having a rotor which forms a permanently magnetized driving member, means for applying d.c. pulses to said stepper motor to rotate said member, a permanently magnetized balance member rotatably mounted about its central axis adjacent but spaced from said driving member and forming a magnetic coupling therewith which causes said balance member to tend to rotate about said axis in response to rotation of said driving member, said driving member being mounted coaxially with said balance member, means cooperating with said balance member for limiting the motion thereof so that said balance member oscillates at a predetermined natural frequency in response to rotation of said driving member, and a feedback system which controls the pulse applying means in accordance with the frequency of the oscillations of said balance member, said feedback system including means for generating an electrical signal in accordance with the oscillations of said balance member and means responsive to the frequency of said signal for controlling the rotation speed of said driving member.
Claim 11
Dependent Claim
194 words
A time base frequency source including a permanently magnetized driving member, means for rotation said member about an axis, said rotating means comprising an electric motor having a rotating shaft and said driving member being fixedly coaxially mounted thereon, a permanently magnetized balance member mounted about its central axis adjacent said driving member and forming a magnetic coupling therewith, mounting means for said balance member including a shaft coaxial with the motor shaft and mounted in jeweled bearings, a temperature compensated hair spring one end of which is connected to said balance member and the other end of which is connected to an adjustable support to cause said balance member to oscillate about its central axis at a predetermined natural frequency in response to rotation of said driving member, a pickup coil adjacent said balance member for generating an electrical signal in accordance with the oscillations of said balance member, and means responsive to the frequency of said signal for applying pulses to said rotating means in accordance with said frequency, said frequency responsive means including a pair of output terminals for delivering a waveform having the frequency of said signal from said coil.
Claim 12
Dependent Claim
194 words
A time base frequency source including a permanently magnetized driving member, means for rotation said member about an axis, said rotating means comprising an electric motor having a rotating shaft and said driving member being fixedly coaxially mounted thereon, a permanently magnetized balance member mounted about its central axis adjacent said driving member and forming a magnetic coupling therewith, mounting means for said balance member including a shaft coaxial with the motor shaft and mounted in jeweled bearings, a temperature compensated hair spring one end of which is connected to said balance member and the other end of which is connected to an adjustable support to cause said balance member to oscillate about its central axis at a predetermined natural frequency in response to rotation of said driving member, a pickup coil adjacent said balance member for generating an electrical signal in accordance with the oscillations of said balance member, and means responsive to the frequency of said signal for applying pulses to said rotating means in accordance with said frequency, said frequency responsive means including a pair of output terminals for delivering a waveform having the frequency of said signal from said coil.
Claim 13
Dependent Claim
28 words
A time base frequency source according to claim 9 wherein means are provided for shielding the signal coil and balance member from electromagnetic radiation from said electric motor.
Claim 14
Dependent Claim
23 words
A time base frequency source according to claim 9 wherein said electric motor includes a rotor and said driving member comprises said rotor.
Claim 15
Dependent Claim
210 words
A time base frequency source comprising a stepper motor including a permanently magnetized driving member and means for rotating said member about an axis, a permanently magnetized balance member mounted about its central axis adjacent said driving member and forming a magnetic coupling therewith, a temperature compensated hair spring one end of which is connected to said balance member and the other end of which is connected to an adjustable support to cause said balance member to oscillate about its central axis at a predetermined natural frequency in response to rotation of said driving member, a pickup coil adjacent said balance member for generating an electrical signal in accordance with the oscillations of said balance member, and means responsive to the frequency of said signal for controlling the speed of said motor in accordance with said frequency, said frequency responsive means comprising a phase shift oscillator having a predetermined natural frequency of oscillation and adapted to pulse said motor at said predetermined frequency in the absence of said signal from said pickup coil and to oscillate at said signal frequency in response to receipt of said signal, said frequency responsive means including a pair of output terminals for delivering a waveform having the frequency of said signal from said coil.
Claim 16
Dependent Claim
210 words
A time base frequency source comprising a stepper motor including a permanently magnetized driving member and means for rotating said member about an axis, a permanently magnetized balance member mounted about its central axis adjacent said driving member and forming a magnetic coupling therewith, a temperature compensated hair spring one end of which is connected to said balance member and the other end of which is connected to an adjustable support to cause said balance member to oscillate about its central axis at a predetermined natural frequency in response to rotation of said driving member, a pickup coil adjacent said balance member for generating an electrical signal in accordance with the oscillations of said balance member, and means responsive to the frequency of said signal for controlling the speed of said motor in accordance with said frequency, said frequency responsive means comprising a phase shift oscillator having a predetermined natural frequency of oscillation and adapted to pulse said motor at said predetermined frequency in the absence of said signal from said pickup coil and to oscillate at said signal frequency in response to receipt of said signal, said frequency responsive means including a pair of output terminals for delivering a waveform having the frequency of said signal from said coil.
Claim 17
Independent Claim
126 words
A device comprising a permanently magnetized driving member, means for rotating said member, a permanently magnetized balance member rotatably mounted about its central axis adjacent but spaced from said driving member and forming a magnetic coupling therewith which causes said balance member to tend to rotate about said axis in response to rotation of said driving member, a permanently magnetized member mounted coaxially about said balance member to limit the motion thereof so that said balance member oscillates at a predetermined natural frequency in response to rotation of said driving member, said permanently magnetized member consisting of a ring of ferrite material, and a feedback system which controls the speed of the rotating means in accordance with the frequency of the oscillations of said balance member.
Claim 18
Independent Claim
126 words
A device comprising a permanently magnetized driving member, means for rotating said member, a permanently magnetized balance member rotatably mounted about its central axis adjacent but spaced from said driving member and forming a magnetic coupling therewith which causes said balance member to tend to rotate about said axis in response to rotation of said driving member, a permanently magnetized member mounted coaxially about said balance member to limit the motion thereof so that said balance member oscillates at a predetermined natural frequency in response to rotation of said driving member, said permanently magnetized member consisting of a ring of ferrite material, and a feedback system which controls the speed of the rotating means in accordance with the frequency of the oscillations of said balance member.
Claim 19
Independent Claim
152 words
A device comprising a permanently magnetized driving member, means comprising an electric motor for rotating said member, a permanently magnetized balance member rotatably mounted about its central axis adjacent but spaced from said driving member and forming a magnetic coupling therewith which causes said balance member to tend to rotate about said axis in response to rotation of said driving member, magnetic means cooperating with said balance member for limiting the motion thereof so that said balance member oscillates at a predetermined natural frequency in response to rotation of said driving member, and a feedback system which controls the speed of the rotating means in accordance with the frequency of the oscillations of said balance member, said feedback system including means for generating an electrical signal in accordance with the oscillations of said balance member and means responsive to the frequency of said signal for controlling the rotation speed of said motor.
Claim 20
Independent Claim
152 words
A device comprising a permanently magnetized driving member, means comprising an electric motor for rotating said member, a permanently magnetized balance member rotatably mounted about its central axis adjacent but spaced from said driving member and forming a magnetic coupling therewith which causes said balance member to tend to rotate about said axis in response to rotation of said driving member, magnetic means cooperating with said balance member for limiting the motion thereof so that said balance member oscillates at a predetermined natural frequency in response to rotation of said driving member, and a feedback system which controls the speed of the rotating means in accordance with the frequency of the oscillations of said balance member, said feedback system including means for generating an electrical signal in accordance with the oscillations of said balance member and means responsive to the frequency of said signal for controlling the rotation speed of said motor.
Claim 21
Independent Claim
115 words
A device comprising a permanently magnetized driving member, means for rotating said member, a permanently magnetized balance member rotatably mounted about its central axis adjacent but spaced from said driving member and forming a magnetic coupling therewith which causes said balance member to tend to rotate about said axis in response to rotation of said driving member, a permanently magnetized member mounted coaxially about said balance member to limit the motion thereof so that said balance member oscillates at a predetermined natural frequency in response to rotation of said driving member, and a feedback system which controls the speed of the rotating means in accordance with the frequency of the oscillations of said balance member.
Claim 22
Independent Claim
115 words
A device comprising a permanently magnetized driving member, means for rotating said member, a permanently magnetized balance member rotatably mounted about its central axis adjacent but spaced from said driving member and forming a magnetic coupling therewith which causes said balance member to tend to rotate about said axis in response to rotation of said driving member, a permanently magnetized member mounted coaxially about said balance member to limit the motion thereof so that said balance member oscillates at a predetermined natural frequency in response to rotation of said driving member, and a feedback system which controls the speed of the rotating means in accordance with the frequency of the oscillations of said balance member.
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) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |