Patent US3667042A successfully refreshed from Google Patents.
US3667042A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit arrangement for remote indication of the rotary movement of a shaft
Assignee: Siemens AG
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Filing: 1969-10-28
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Granted: 1972-05-30
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Expires: 1989-10-28
Abstract
Abstract An electronic pulse generator has a permanent magnet driven by a shaft and a stationary Hall generator in operative proximity with the magnet. The base electrode of a transistor is directly connected to one of the Hall voltage electrodes of the Hall generator. The stator winding of a stepping motor is connected to the emitter-collector circuit of the transistor, is driven by the Hall voltage via the transistor, and in turn drives a speedometer coupled to the transistor.
Inventors
- 👤 Walter Engel
- 👤 Dieter Flachsbarth
- 👤 Hermann Schwarz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:01
CPC Classifications
G; G01; G01P; G01P3/00; G01P3/42; G01P3/44; G01P3/48; G01P3/481; G01P3/487; G01D; G01D5/00; G01D5/12; G01D5/14; G01D5/142; G01P3/4802
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
187 words
A circuit arrangement for remote indication of the rotary movement of a shaft, said circuit arrangement comprising an electronic pulse generator having a permanent magnet driven by said shaft and a stationary Hall generator in operative proximity with said magnet, said Hall generator having a pair of control electrodes and a pair of Hall voltage electrodes; a transistor having emitter, collector, and base electrodes and an emitter-collector circuit, the base electrode of said transistor being directly connected to one of the Hall voltage electrodes of said Hall generator; speedometer and odometer means coupled to said transistor for indicating the speed and the rotary distance traveled by said shaft; and a stepping motor coupled to and driving said speedometer and odometer means, said stepping motor having a permanently magnetic rotor and a non-inductively wound stator winding, the stator winding of the stepping motor having two winding branches, one of which is connected to a control electrode of the Hall generator and another of which is connected to the emitter-collector circuit of said transistor in a manner whereby the Hall voltage produced by said Hall generator drives said motor.
Claim 2
Dependent Claim
187 words
A circuit arrangement for remote indication of the rotary movement of a shaft, said circuit arrangement comprising an electronic pulse generator having a permanent magnet driven by said shaft and a stationary Hall generator in operative proximity with said magnet, said Hall generator having a pair of control electrodes and a pair of Hall voltage electrodes; a transistor having emitter, collector, and base electrodes and an emitter-collector circuit, the base electrode of said transistor being directly connected to one of the Hall voltage electrodes of said Hall generator; speedometer and odometer means coupled to said transistor for indicating the speed and the rotary distance traveled by said shaft; and a stepping motor coupled to and driving said speedometer and odometer means, said stepping motor having a permanently magnetic rotor and a non-inductively wound stator winding, the stator winding of the stepping motor having two winding branches, one of which is connected to a control electrode of the Hall generator and another of which is connected to the emitter-collector circuit of said transistor in a manner whereby the Hall voltage produced by said Hall generator drives said motor.
Claim 3
Dependent Claim
82 words
A circuit arrangement as claimed in claim 1, wherein when the transistor is in its conductive condition current flows through the other branch of the stator winding of the stepping motor and when the transistor is in its non-conductive condition current flows through the one branch of said stator winding, the current flowing through the other branch of the stator winding of said stepping motor being approximately twice the magnitude of the current flowing through the one branch of said stator winding.
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) | 1975-05-30 | 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 |