Patent US3587016A successfully refreshed from Google Patents.
US3587016A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Null adjuster for magnetically operated torque motors
Assignee: PepsiAmericas Inc
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Filing: 1970-01-29
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Granted: 1971-06-22
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Expires: 1990-01-29
Abstract
Abstract A device for adjusting the null current of a magnetically operated torque motor or force motor, preferably including a cylindrically shaped cap movably supporting a permanent magnet near the outside surface of the housing of the motor for angular adjustment about an axis substantially perpendicular to the axis of the armature.
Inventors
- 👤 James L Coakley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:02
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/06; H01F7/08; H01F7/16; H01F7/1638; H01F7/1646; H01F7/14; H01F7/121; H01F7/122; Y; Y10; Y10T; Y10T137/00; Y10T137/2278
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
148 words
In combination: a. a motor for producing a motive output on a movable armature enclosed within a surrounding housing, said armature forming air gaps in conjunction with pole faces, the motive output on said armature being variable in response to a change in magnetic flux across said air gaps, said motor also having electromagnetic means for changing the flux across said gaps in accordance with an input current; and b. adjusting means external to said housing for magnetically changing the null current, said adjusting means comprising: a supporting body engaging at least a part of the outer surface of said housing, said body being adjustably movable on said housing, means for securing said body with respect to said housing, a magnet mounted to said body, said magnet magnetically interacting with saId motor to change the null current of said motor when said body is moved on said housing.
Claim 2
Dependent Claim
148 words
In combination: a. a motor for producing a motive output on a movable armature enclosed within a surrounding housing, said armature forming air gaps in conjunction with pole faces, the motive output on said armature being variable in response to a change in magnetic flux across said air gaps, said motor also having electromagnetic means for changing the flux across said gaps in accordance with an input current; and b. adjusting means external to said housing for magnetically changing the null current, said adjusting means comprising: a supporting body engaging at least a part of the outer surface of said housing, said body being adjustably movable on said housing, means for securing said body with respect to said housing, a magnet mounted to said body, said magnet magnetically interacting with saId motor to change the null current of said motor when said body is moved on said housing.
Claim 3
Dependent Claim
18 words
The combination of claim 1 wherein said means for securing the body on said housing comprises a clamp.
Claim 4
Dependent Claim
30 words
The combination of claim 1 wherein said housing and body are right cylinders and said body frictionally engages the outside surface of said housing, and is rotatable around said housing.
Claim 5
Dependent Claim
12 words
The combination of claim 1 wherein said magnet is a permanent magnet.
Claim 6
Dependent Claim
31 words
The combination of claim 4 wherein said permanent magnet is secured to said body and is oriented along a line perpendicular to a line perpendicular to the shaft of said motor.
Claim 7
Dependent Claim
97 words
A null adjuster for use with a motor which produces a motive output on an internal movable armature and having an outer housing, said armature forming air gaps in conjunction with pole faces, the motive output on said armature being variable in response to a change in magnetic flux across said air gaps, said null adjuster comprising: a cap-shaped nonmagnetic body portion; a permanent magnet mounted to said body portion; and means for clamping said body portion in desired position on the housing of such a motor when said null adjuster is placed on the motor housing.
Claim 8
Dependent Claim
97 words
A null adjuster for use with a motor which produces a motive output on an internal movable armature and having an outer housing, said armature forming air gaps in conjunction with pole faces, the motive output on said armature being variable in response to a change in magnetic flux across said air gaps, said null adjuster comprising: a cap-shaped nonmagnetic body portion; a permanent magnet mounted to said body portion; and means for clamping said body portion in desired position on the housing of such a motor when said null adjuster is placed on the motor housing.
Claim 9
Dependent Claim
61 words
The null adjuster of claim 6 for use with a motor having a cylindrically shaped outer housing, wherein said body portion is cylindrically shaped and has an inside surface of slightly greater diameter than the outside surface of the housing of such a motor, whereby said null adjuster can be clamped in desired angular position on the housing of the motor.
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) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |