Patent US4323938A successfully refreshed from Google Patents.
US4323938A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rolling pivot for magnetic head
Assignee: Xerox Corp
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Filing: 1980-05-23
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Granted: 1982-04-06
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Expires: 2000-05-23
Abstract
Abstract A recording apparatus in which the cantilevered arm supporting a recording device has a smoothly curved surface adjacent the flexure spring joining the arm to a carriage whereby a rolling pivot is provided such that the bending stress on the flexure spring is minimized and is constant and independent of the degree that the cantilevered arm is raised. An end of the cantilevered arm is held against the carriage by a spring, one end of which is coupled to a translation mechanism which permits the recording device load force to be adjusted.
Inventors
- 👤 Herbert E. Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:04
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/54; G11B21/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
136 words
An apparatus for supporting a recording device comprising: a support arm, a carriage member, a flexure spring, means for securing a portion of said flexure spring to a first portion of an end section of said support arm and for securing another portion of said flexure spring to a portion of a section of said carriage member whereby said flexure spring couples said support arm to said carriage member, said flexure spring being located between said section of said support arm and said section of said carriage member, a second portion of said end section of said support arm having a smoothly curved surface adjacent a portion of said flexure spring whereby a rolling pivot along said curved surface is provided for said support arm when said support arm is moved relative to said carriage member.
Claim 2
Independent Claim
136 words
An apparatus for supporting a recording device comprising: a support arm, a carriage member, a flexure spring, means for securing a portion of said flexure spring to a first portion of an end section of said support arm and for securing another portion of said flexure spring to a portion of a section of said carriage member whereby said flexure spring couples said support arm to said carriage member, said flexure spring being located between said section of said support arm and said section of said carriage member, a second portion of said end section of said support arm having a smoothly curved surface adjacent a portion of said flexure spring whereby a rolling pivot along said curved surface is provided for said support arm when said support arm is moved relative to said carriage member.
Claim 3
Dependent Claim
16 words
The apparatus of claim 1 in which said curved surface has a constant rate of curvature.
Claim 4
Independent Claim
157 words
An apparatus for supporting a recording device comprising: an elongated support arm, a carriage member, a flexure spring, first means for securing a portion of said flexure spring to a first portion of an end section of said support arm and for securing another portion of said flexure spring to a portion of a section of said carriage member whereby said flexure spring couples said support arm to said carriage member, said flexure spring being located between said section of said support arm and said section of said carriage member, a second portion of said end section of said support arm having a smoothly curved surface adjacent a portion of said flexure spring whereby a rolling pivot along said curved surface is provided for said support arm when said support arm is moved relative to said carriage member, and second means for forcing said second portion of said support arm toward said section of said carriage member.
Claim 5
Independent Claim
157 words
An apparatus for supporting a recording device comprising: an elongated support arm, a carriage member, a flexure spring, first means for securing a portion of said flexure spring to a first portion of an end section of said support arm and for securing another portion of said flexure spring to a portion of a section of said carriage member whereby said flexure spring couples said support arm to said carriage member, said flexure spring being located between said section of said support arm and said section of said carriage member, a second portion of said end section of said support arm having a smoothly curved surface adjacent a portion of said flexure spring whereby a rolling pivot along said curved surface is provided for said support arm when said support arm is moved relative to said carriage member, and second means for forcing said second portion of said support arm toward said section of said carriage member.
Claim 6
Dependent Claim
14 words
The apparatus of claim 3 in which said second means is a tensioned spring.
Claim 7
Dependent Claim
54 words
The apparatus of claim 4 in which one end of said tensioned spring is coupled to said carriage member and the other end of said spring is coupled to a device which can be translated along the longitudinal axis of said support arm whereby the load force of the support arm can be adjusted.
References Cited (Backward Citations)
US3946439A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-04-05 | 1985-10-05 | 1986-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-04-05 | 1989-10-05 | 1990-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-04-05 | 1993-10-05 | 1994-04-06 | $7700.00 | Window Closed / Lapsed |