US3895543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustment mechanism
Assignee: ABB Instrumentation Inc
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Filing: 1974-01-11
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Granted: 1975-07-22
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Expires: 1994-01-11
Abstract
Abstract A movable carriage is mounted via threaded connection to a rotatable adjusting element. A guide limits the rotational movement of the carriage. Resilient forces are applied to the carriage in a first direction to assure a tight coupling between the threaded connection, and in a second direction to assure a tight coupling between the guide and the carriage, thereby reducing the backlash and/or deadband in the mechanism to an acceptable level.
Inventors
- 👤 Paul T Metzger
- 👤 Wayne D Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:05
CPC Classifications
F; F16; F16H; F16H57/00; F16H57/12; G; G05; G05G; G05G23/00; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18568; Y10T74/18576; Y10T74/19; Y10T74/19623
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
226 words
An adjustment mechanism comprising: a rotatable threaded member; carriage means, including a threaded portion, coupled to said threaded member for movement in response to the rotation of the threaded member; guide means including a shaft extending generally parallel to said threaded member and through an aperture formed in said carriage means for preventing the rotation of said carriage means in response to the rotation of said threaded member; said resilient means including a spring positioned around said shaft; and wherein said aperture formed in said carriage means is in the form of an open ended slot providing a forked end, one forcated member of such end having a dimension extending in the direction of said shaft substantially less than the corresponding dimension of the other forcated member, and said other forcated member being formed with a beveled edge that engages the resilient means to cause a force to be generated in a first direction generally parallel to said shaft forwards said carriage to apply a continuous twisting moment between the threaded coupling between said carriage means and said threaded member in a direction to provide a tight coupling therebetween, and a force to be generated in a second direction generally normal to said shaft to cause said carriage means to rotate about said threaded coupling to continuously engage a side of the aperature against the shaft.
Claim 2
Dependent Claim
226 words
An adjustment mechanism comprising: a rotatable threaded member; carriage means, including a threaded portion, coupled to said threaded member for movement in response to the rotation of the threaded member; guide means including a shaft extending generally parallel to said threaded member and through an aperture formed in said carriage means for preventing the rotation of said carriage means in response to the rotation of said threaded member; said resilient means including a spring positioned around said shaft; and wherein said aperture formed in said carriage means is in the form of an open ended slot providing a forked end, one forcated member of such end having a dimension extending in the direction of said shaft substantially less than the corresponding dimension of the other forcated member, and said other forcated member being formed with a beveled edge that engages the resilient means to cause a force to be generated in a first direction generally parallel to said shaft forwards said carriage to apply a continuous twisting moment between the threaded coupling between said carriage means and said threaded member in a direction to provide a tight coupling therebetween, and a force to be generated in a second direction generally normal to said shaft to cause said carriage means to rotate about said threaded coupling to continuously engage a side of the aperature against the shaft.
Claim 3
Dependent Claim
43 words
An adjustment mechanism as defined in claim 1 wherein: said resilient means includes a movable member slidably mounted on said shaft and positioned between said spring and said carriage and including a curved portion for engaging the beveled portion of said carriage means.
Claim 4
Dependent Claim
79 words
An adjustment mechanism as defined in claim 2 wherein: said threaded member comprises elongated cylindrical shaft having a threaded portion and a non-threaded portion, wherein said non-threaded portion is positioned in a cylindrical bearing mounted on a base. said carriage means is formed with a threaded aperture for mounting said carriage means on said threaded shaft of said threaded member, and said guide means shaft is mounted at one end thereof to the same base as said threaded member.
Claim 5
Dependent Claim
46 words
An adjustment mechanism as defined in claim 3 wherein: said rotatable threaded member includes a pair of bearing surfaces at opposite ends of the non-threaded portion of said cylindrical shaft that engage the cylindrical bearing; and said first rotational moment provide a tight bearing coupling therebetween.
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) | 1978-07-21 | 1979-01-20 | 1979-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-21 | 1983-01-20 | 1983-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-21 | 1987-01-20 | 1987-07-22 | $7700.00 | Window Closed / Lapsed |