US3854339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and device for balancing of rotors
Assignee: Gebr Hofmann GmbH and Co KG Maschinenfabrik
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Filing: 1973-08-31
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Granted: 1974-12-17
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Expires: 1993-08-31
Abstract
Abstract A method and apparatus or balancing rotors, such as rotors for motors, in which the rotation of parts such as teeth are inductively sensed by a fixed sensor to produce a pulse train which is counted to provide a phase relative signal. The phase relative signal is then employed to stop the rotor at any given position for removal of mass in balancing.
Inventors
- 👤 R Muller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:56
CPC Classifications
G; G01; G01M; G01M1/00; G01M1/30; G01M1/34; G01M1/14; G01M1/16; G01M1/22
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
100 words
Apparatus for stopping a rotor at a given position comprising: means for mounting a rotor for rotation, means for rotating the mounted rotor, means for sensing portions of a rotating rotor extending about its periphery and separated by areas having characteristics different from said portions and producing a train of pulses, each pulse being associated with a portion, means connected to said sensing means for receiving said train of pulses, counting said pulses and providing a reference pulse for each revolution of said rotor, and means responsive to said reference pulse for stopping said rotor in a given angular position.
Claim 2
Dependent Claim
100 words
Apparatus for stopping a rotor at a given position comprising: means for mounting a rotor for rotation, means for rotating the mounted rotor, means for sensing portions of a rotating rotor extending about its periphery and separated by areas having characteristics different from said portions and producing a train of pulses, each pulse being associated with a portion, means connected to said sensing means for receiving said train of pulses, counting said pulses and providing a reference pulse for each revolution of said rotor, and means responsive to said reference pulse for stopping said rotor in a given angular position.
Claim 3
Dependent Claim
18 words
Apparatus as in claim 1 wherein said sensing means includes means for inductively sensing teeth on said rotor.
Claim 4
Dependent Claim
13 words
Apparatus as in claim 2 wherein said inductively sensing means includes a coil.
Claim 5
Dependent Claim
63 words
Apparatus as in claim 1 wherein said stopping means includes a pivotably mounted latch member having a teeth-engaging portion, electromagnetic means for causing said latch member to pivot to a position engaging rotor teeth, electronic switching means actuating said electromagnetic means in response to receipt of a reference pulse and switch means connecting said receiving, counting and providing means to said electromagnetic means.
Claim 6
Dependent Claim
82 words
Apparatus as in claim 4 wherein said electromagnetic means includes a coil and said electronic switching means includes a capacitor, means for charging said capacitor, and an electronic switch connecting said capacitor to said coil and connected to said switch means so that said electronic means completes a current path permitting said capacitor to discharge through said coil when said reference pulse is applied to said electronic means so that said coil causes said latch member to pivot and engage said teeth.
Claim 7
Dependent Claim
12 words
Apparatus as in claim 5 wherein said electronic means is a thyristor.
Claim 8
Dependent Claim
24 words
Apparatus as in claim 5 wherein said stopping means includes a spring urging said latch member to pivot out of engagement with said teeth.
Claim 9
Dependent Claim
13 words
Apparatus as in claim 1 wherein said stopping means includes a magnetic latch.
Claim 10
Dependent Claim
20 words
Apparatus as in claim 1 wherein said reference pulse is the reset pulse of said receiving, counting and providing means.
Claim 11
Dependent Claim
66 words
Apparatus as in claim 1 further including a ciRcuit connected in series to receiving, counting and providing means which circuit forms two rectangular pulses with 90* phase displacement from said reference pulse, a controlled rectifier circuit which receives these rectangular pulses as well as the signals created by the oscillations of imbalance and supplies two D.C. voltages corresponding to the x- and y-components of the imbalance
Claim 12
Independent Claim
71 words
A method for stopping a rotor at a given position comprising: sensing portions of a rotor extending about its periphery and separated by areas having characteristics different from said portions and producing a train of pulses, each pulse being associated with a portion, counting said pulses and providing a reference pulse for each revolution of said rotor, and responsive to said reference pulse stopping said rotor in a given angular position.
Claim 13
Independent Claim
71 words
A method for stopping a rotor at a given position comprising: sensing portions of a rotor extending about its periphery and separated by areas having characteristics different from said portions and producing a train of pulses, each pulse being associated with a portion, counting said pulses and providing a reference pulse for each revolution of said rotor, and responsive to said reference pulse stopping said rotor in a given angular position.
References Cited (Backward Citations)
US3616686A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |