US3582211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Goniometer
Assignee: Doall Co
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Filing: 1969-10-02
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Granted: 1971-06-01
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Expires: 1989-10-02
Abstract
Abstract A flat granite base has a turntable mounted thereon for rotation about a fixed axis; and an endless tape trained about the turntable and a drive wheel by which rotation can be imparted to the turntable, has one stretch thereof attached to a slide which rides in a straight track on the base. An interferometer on the base and a light-reflecting mirror on the slide coact to measure movement of the slide along the track and thereby provide a precisely correct measurement of the angle through which the turntable and a part fixed thereon has been rotated.
Inventors
- 👤 Douglas G Mcclure
- 👤 John W Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:26
CPC Classifications
G; G01; G01D; G01D5/00; G01D5/26; G01D5/266; G01B; G01B11/00; G01B11/26
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
210 words
A goniometer comprising: A. a base; B. a turntable mounted on the base for rotation about an axis fixed with respect thereto; C. straight track means on the base; D. a slide mounted on said track means for linear movement therealong; E. light-reflecting means fixed on said slide; F. interferometer means fixed on the base and coacting with said light-reflecting means to provide for accurate measurement of the magnitude of any movement of said slide along the track means; G. a circular track on the turntable concentric to its axis of rotation; D. a flexible nonstretchable tension member trained about said circular track on the turntable and having a nonslipping engagement therewith, said tension member having a stretch thereof tangent to said circular track and parallel to said straight track means; I. means securing said stretch of the tension member to said slide; and J. means acting on said slide to maintain a predetermined fixed tension on said stretch of the tension member, so that any rotation of the turntable is accompanied by linear movement of the slide along said straight track means and the measurement of the magnitude of such linear movement of the slide is an accurate indication of the angle through which the turntable has been rotated.
Claim 2
Dependent Claim
210 words
A goniometer comprising: A. a base; B. a turntable mounted on the base for rotation about an axis fixed with respect thereto; C. straight track means on the base; D. a slide mounted on said track means for linear movement therealong; E. light-reflecting means fixed on said slide; F. interferometer means fixed on the base and coacting with said light-reflecting means to provide for accurate measurement of the magnitude of any movement of said slide along the track means; G. a circular track on the turntable concentric to its axis of rotation; D. a flexible nonstretchable tension member trained about said circular track on the turntable and having a nonslipping engagement therewith, said tension member having a stretch thereof tangent to said circular track and parallel to said straight track means; I. means securing said stretch of the tension member to said slide; and J. means acting on said slide to maintain a predetermined fixed tension on said stretch of the tension member, so that any rotation of the turntable is accompanied by linear movement of the slide along said straight track means and the measurement of the magnitude of such linear movement of the slide is an accurate indication of the angle through which the turntable has been rotated.
Claim 3
Dependent Claim
30 words
The goniometer of claim 1, further characterized by drive means connected with said stretch of the tension member to impart endwise movement thereto and thus effect rotation of the turntable.
Claim 4
Dependent Claim
13 words
a motion imparting connection between the flexible tensiOn member and the drive wheel.
Claim 5
Dependent Claim
13 words
a motion imparting connection between the flexible tensiOn member and the drive wheel.
Claim 6
Dependent Claim
28 words
The goniometer of claim 2, wherein the interferometer means is in line with and opposite one end of said straight track means, and wherein said drive means comprises
Claim 7
Dependent Claim
28 words
The goniometer of claim 3, wherein the flexible tension member is endless and is trained about the drive wheel as well as the circular track on the turntable.
Claim 8
Dependent Claim
77 words
The goniometer of claim 1, wherein the underside of the turntable on is directly contiguous to the top of the base, and wherein the mounting of the turntable on the base comprises a journal depending from the turntable and a bearing in the base in which said journal is received, and further characterized by means for maintaining a film of air between the contiguous surfaces of the journal and the bearing and the turntable and the base.
Claim 9
Dependent Claim
35 words
The goniometer of claim 4, wherein the mounting of the drive wheel provides for bodily adjustment thereof towards and from the turntable; and means for effecting such adjustment and thereby tensioning the flexible tension member.
Claim 10
Dependent Claim
21 words
The goniometer of claim 3, further characterized by rotation imparting means drivingly connected with the drive wheel for imparting rotation thereto.
Claim 11
Dependent Claim
25 words
The goniometer of claim 1, further characterized by means for maintaining a film of air between contiguous surfaces of the slide and the track means.
Claim 12
Dependent Claim
15 words
The goniometer of claim 5, wherein the base and the turntable are formed of granite.
References Cited (Backward Citations)
US3085466A
Cited
FR1380740A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |