US3628781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compound tine for tuning fork or the like
Assignee: PHILAMON Inc
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Filing: 1969-10-03
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Granted: 1971-12-21
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Expires: 1989-10-03
Abstract
Abstract A light modulator structure employs a cross compound tine tuning fork structure arranged to produce the effect that the ends of the tines have exaggerated rotational motion with respect to each other and this motion is exploited by mirrors secured to the ends of tines to scan over a relatively wide angle a light beam projected to reflect successively from the two mirrors. A similar compound structure is incorporated in a simple scale having no frictionally moving parts. The scale compound cantilever is parallel rather than crossed and substantially eliminates scale pan rotation.
Inventors
- 👤 Boris F Grib
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:40
CPC Classifications
G; G01; G01J; G01J1/00; G01J1/10; G01J1/20; G01J1/34; G01J1/36; G04; G04C; G04C3/00; G04C3/08; G04C3/10; G04C3/101; G04C3/102; G10; G10G; G10G7/00; G10G7/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
156 words
A tuning fork in the form of a dual compound cantilever structure for causing a pair of movable members to have accentuated rotational motion relative to a stationary reference plane comprising a first resiliently deformable body having at least two transposed similar elongated resiliently bendable portions, the ends of each of said bendable portions being respectively fixedly joined to enlarged rigid portions of said member, the first of said rigid portions being fixed to define a reference plane and the second being resiliently supported to have accentuated rotational motion relative to the first, a second resiliently deformable body substantially the same as the said first resiliently deformable body, and means for rigidly securing the respective first ones of said rigid portions of said resiliently deformable bodies in spaced relationship to provide a tuning fork structure in which each of the tines of the tuning fork comprises the free end of one of said resiliently deformable bodies.
Claim 2
Dependent Claim
156 words
A tuning fork in the form of a dual compound cantilever structure for causing a pair of movable members to have accentuated rotational motion relative to a stationary reference plane comprising a first resiliently deformable body having at least two transposed similar elongated resiliently bendable portions, the ends of each of said bendable portions being respectively fixedly joined to enlarged rigid portions of said member, the first of said rigid portions being fixed to define a reference plane and the second being resiliently supported to have accentuated rotational motion relative to the first, a second resiliently deformable body substantially the same as the said first resiliently deformable body, and means for rigidly securing the respective first ones of said rigid portions of said resiliently deformable bodies in spaced relationship to provide a tuning fork structure in which each of the tines of the tuning fork comprises the free end of one of said resiliently deformable bodies.
Claim 3
Dependent Claim
45 words
Apparatus as claimed in claim 1 wherein said similar elongated resiliently bendable portions have a principal plane of resilience and their cross-sectional dimension perpendicular to said plane of resilience is at least three times as great as their dimension parallel to said plane of resilience.
Claim 4
Dependent Claim
45 words
Apparatus as claimed in claim 2 wherein the length of said similar elongated resiliently bendable portions in a direction perpendicular to said reference plane is at least 10 times the cross-sectional dimension of said similar elongated resiliently bendable portions parallel to said plane of resilience.
Claim 5
Dependent Claim
44 words
Apparatus as claimed in claim 1 wherein each deformable body there are three of said similar elongated resiliently bendable portions including two outer bendable portions and one inner bendable portion, the inner bendable portion being transposed relative to each of the outer bendable portions.
Claim 6
Dependent Claim
34 words
Apparatus as claimed in claim 1 wherein for each deformable body the spacings between said similar elongated resiliently bendable portions where they are joined to respective ones of said enlarged rigid portions are equal.
Claim 7
Dependent Claim
37 words
Apparatus as claimed in claim 1 wherein the portion of each said resiliently deformable body where said bendable portions are fixedly joined to said enlarged rigid portions is a homogeneous unitary portion of said resiliently deformable body.
References Cited (Backward Citations)
US2793028A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |