US3699415A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Constant speed drive units for driving devices
Assignee: AICHI CLOCK AND ELECTRIC IMPLEMENT Manufacturing Co Ltd
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Filing: 1970-08-26
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Granted: 1972-10-17
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Expires: 1990-08-26
Abstract
Abstract The present invention relates a constant speed device for driving means using a transistor switching effect adapted to an apparatus to obtain an uniform rate of rotation or amplitude for electric motors and electromechanical oscillators which can be sufficiently used for timepieces and instruments, and in which a relatively moving member driven by electrical means is provided, and a control member connected to the junction of a diode and a condenser.
Inventors
- 👤 Yutaka Inoue
- 👤 Tadao Hotta
- 👤 Toshihiko Ito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:46
CPC Classifications
H; H02; H02P; H02P6/00; H02P6/08
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
328 words
A speed fixing circuit, comprising a voltage generating means for producing voltage by relative motion of a moving member with respect thereto, driving means including a switching transistor adapted to receive as an input a voltage from said voltage generating means induced by a relative motion with respect thereto of said moving member and discharging an output for accelerating said relative motion, a control voltage increasing means connected to said voltage generating means for receiving an input voltage from said voltage generating means, a controlling means connected to said control voltage increasing means for receiving as an input thereto a voltage changed in response to a velocity change of the relative motion of said moving member, said controlling means being connected to said switching transistor for discharging an output current decreasing an input voltage to said switching transistor only when an input voltage thereto in one direction exceeds the threshold voltage of said controlling means and passing very little current when an input voltage is applied thereto in the other direction, said control voltage increasing means comprises, a capacitor connected to an input portion of said controlling means and to said voltage generating means and receiving voltage changing in response to a change of velocity of the relative motion of said moving member, so as to permit to pass therethrough a charging current in a direction opposite to a current direction when a forward input voltage is applied to said controlling means, a diode connected to a side of said capacitor remote from said voltage generating means and disposed in a portion of said control voltage increasing means in the path of said charging current and arranged in the latter portion excluded from said input portion of said controlling means, and oriented in a direction so as to block current in a direction reverse to that of said charging current, and said controlling means having said input portion connected to a point between said capacitor and said diode.
Claim 2
Dependent Claim
328 words
A speed fixing circuit, comprising a voltage generating means for producing voltage by relative motion of a moving member with respect thereto, driving means including a switching transistor adapted to receive as an input a voltage from said voltage generating means induced by a relative motion with respect thereto of said moving member and discharging an output for accelerating said relative motion, a control voltage increasing means connected to said voltage generating means for receiving an input voltage from said voltage generating means, a controlling means connected to said control voltage increasing means for receiving as an input thereto a voltage changed in response to a velocity change of the relative motion of said moving member, said controlling means being connected to said switching transistor for discharging an output current decreasing an input voltage to said switching transistor only when an input voltage thereto in one direction exceeds the threshold voltage of said controlling means and passing very little current when an input voltage is applied thereto in the other direction, said control voltage increasing means comprises, a capacitor connected to an input portion of said controlling means and to said voltage generating means and receiving voltage changing in response to a change of velocity of the relative motion of said moving member, so as to permit to pass therethrough a charging current in a direction opposite to a current direction when a forward input voltage is applied to said controlling means, a diode connected to a side of said capacitor remote from said voltage generating means and disposed in a portion of said control voltage increasing means in the path of said charging current and arranged in the latter portion excluded from said input portion of said controlling means, and oriented in a direction so as to block current in a direction reverse to that of said charging current, and said controlling means having said input portion connected to a point between said capacitor and said diode.
Claim 3
Dependent Claim
49 words
The circuit, as set forth in claim 1, further comprising a temperature compensating resistor having a resistance relatively low with respect to the leakage resistancE of said diode is connected across two parts which are conductive to respective terminals of said capacitor in a circuit passing said charging current.
Claim 4
Dependent Claim
15 words
The circuit, as set forth in claim 1, wherein said controlling means comprises a diode.
Claim 5
Dependent Claim
16 words
The circuit, as set forth in claim 1, wherein said controlling means comprises a second transistor.
Claim 6
Dependent Claim
38 words
The circuit, as set forth in claim 4, wherein said voltage generating means serves as a control voltage generating element for said controlling means, said voltage generating means further serves as a charging element for charging said capacitor.
Claim 7
Dependent Claim
85 words
The circuit, as set forth in claim 4, wherein said driving means includes an element for driving said moving member connected between said switching transistor and said voltage generating means, a power source connected between said driving element and an output of said switching transistor, one of the outputs of said second transistor is connected to the base of said switching transistor, and the other of the outputs of said second transistor is connnected to a point between said power source and said driving element.
Claim 8
Dependent Claim
38 words
The circuit, as set forth in claim 6, wherein said voltage generating means serves as a control voltage generating element for said controlling means, said voltage generating means further serves as a charging element for charging said capacitor.
Claim 9
Dependent Claim
24 words
The circuit, as set forth in claim 1, wherein said voltage generating means serves as a control voltage generating element for said controlling means.
Claim 10
Dependent Claim
23 words
The circuit, as set forth in claim 8, wherein said voltage generating means further serves as a charging element for charging said capacitor.
Claim 11
Dependent Claim
61 words
The circuit, as set forth in claim 1, wherein said driving means includes a driving element connected to an output of said switching transistor for receiving said output from said switching transistor for accelerating said relative motion of said moving member, and said voltage generating means and said driving element are connected and constitute a charging means for charging said capacitor.
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) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |