Patent US3730631A successfully refreshed from Google Patents.
US3730631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Angle gauge
Assignee: Design Systems Inc
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Filing: 1971-09-20
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Granted: 1973-05-01
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Expires: 1991-09-20
Abstract
Abstract A corner angle testing body including a panel member having a notch formed therein defined by a pair of relatively angulated plane surfaces defining a desired included angle therebetween. The panel member further includes an enlargement of the apex portion of the notch adjacent and extending about the point of intersection of the plane surfaces defining the notch and one side of the panel member is provided with a plane partial annular light-reflective surface extending about and concentric with the point of intersection of the plane surfaces defining the notch and the light-reflective surface is disposed normal to the notchdefining plane surfaces or edges.
Inventors
- 👤 G Streander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:44
CPC Classifications
G; G01; G01B; G01B5/00; G01B5/24
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
91 words
An angle testing gauge comprising a body having a pair of relatively angulated straight edges convergent toward a point and disposed in a single plane, said body defining a partially circular sight passage therethrough bound by circular edge portions of said body, said sight passage having radii intersecting at said point and paralleling said plane, said body including a planar partial annular mirror side surface parAlleling said radii and concentric relative to said point, the radii of said passage being less than the radius of the iris of a human eye.
Claim 2
Dependent Claim
91 words
An angle testing gauge comprising a body having a pair of relatively angulated straight edges convergent toward a point and disposed in a single plane, said body defining a partially circular sight passage therethrough bound by circular edge portions of said body, said sight passage having radii intersecting at said point and paralleling said plane, said body including a planar partial annular mirror side surface parAlleling said radii and concentric relative to said point, the radii of said passage being less than the radius of the iris of a human eye.
Claim 3
Dependent Claim
37 words
The combination of claim 1 wherein the radius of the circular path along which the outer periphery of said partial annular mirror side surface extends is greater than the radius of the iris of a human eye.
Claim 4
Dependent Claim
26 words
The combination of claim 1 wherein said body is panel-like in configuration and said relatively angulated straight edges comprise peripheral edge portions of said panel-like body.
Claim 5
Dependent Claim
92 words
An angle testing gauge comprising a body having a pair of relatively angulated straight edges convergent toward a point and disposed in the same plane, said body defining a sight passage therethrough generally centered relative to said point, said body including a planar partial annular mirror side surface paralleling said plane and concentric relative to said point, the radii of the circular path along which the outer peripheral portion of said planar annular mirror side surface extends being at least slightly greater than the radius of the iris of a human eye.
Claim 6
Dependent Claim
92 words
An angle testing gauge comprising a body having a pair of relatively angulated straight edges convergent toward a point and disposed in the same plane, said body defining a sight passage therethrough generally centered relative to said point, said body including a planar partial annular mirror side surface paralleling said plane and concentric relative to said point, the radii of the circular path along which the outer peripheral portion of said planar annular mirror side surface extends being at least slightly greater than the radius of the iris of a human eye.
Claim 7
Dependent Claim
31 words
The combination of claim 4 wherein said body includes generally parallel opposite side surfaces, said planar annular mirror side surface being laterally displaced outwardly of one of said opposite side surfaces.
Claim 8
Dependent Claim
22 words
The combination of claim 1 wherein the radii of said passages are one-half the radius of the iris of a human eye.
References Cited (Backward Citations)
US2461166A
Cited
US2835978A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-30 | 1976-10-30 | 1977-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-30 | 1980-10-30 | 1981-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-30 | 1984-10-30 | 1985-05-01 | $7700.00 | Window Closed / Lapsed |