US3689160A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Angle-reading device
Assignee: Individual
•
Filing: 1970-01-22
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Granted: 1972-09-05
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Expires: 1990-01-22
Abstract
Abstract An angle-reading device comprising a reflector, light source, circular scales, photo-multiplier tubes, and an electronic measuring unit with a meter, the reflector being a system of two mirrors one of which is circular and the other of which is conical and is placed inside the circular one. The light source is a toroidal strobe lamp to modulate the reference signal and the signal corresponding to the value of the angle of each scale step being read, which signals are applied to the electronic measuring unit comprising a differential circuit which compares the two signals.
Inventors
- 👤 Juozas Juozo Shimulenis
- 👤 Petr-Vikenty Martynovi Shulsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:30
CPC Classifications
G; G02; G02B; G02B17/00; G01; G01D; G01D5/00; G01D5/26; G01D5/32; G01D5/34; G01D5/36
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
154 words
An angle-reading device comprising: an optical sensor including a toroidal strobe lamp, circular scales, and a reflector positioned in succession on a common axis; said scales being relatively displaceable about said axis and having respective markings the degree of overlap of which depends on the displacement of the scales; said reflector including a circular mirror and a conical mirror located inside said circular mirror so that the axes of said mirrors are coincident with the common axis; photomultiplier tubes one of which is located near said strobe lamp and generates a reference signal under the influence of said lamp, the other of said photo-multiplier tubes being located adjacent said reflector and generating a signal corresponding to the value of the relative angular displacement of the respective angular markings under the influence of said lamp; an electronic measuring unit including a differential circuit to compare said signals; and a meter connected to said differential circuit.
Claim 2
Dependent Claim
154 words
An angle-reading device comprising: an optical sensor including a toroidal strobe lamp, circular scales, and a reflector positioned in succession on a common axis; said scales being relatively displaceable about said axis and having respective markings the degree of overlap of which depends on the displacement of the scales; said reflector including a circular mirror and a conical mirror located inside said circular mirror so that the axes of said mirrors are coincident with the common axis; photomultiplier tubes one of which is located near said strobe lamp and generates a reference signal under the influence of said lamp, the other of said photo-multiplier tubes being located adjacent said reflector and generating a signal corresponding to the value of the relative angular displacement of the respective angular markings under the influence of said lamp; an electronic measuring unit including a differential circuit to compare said signals; and a meter connected to said differential circuit.
Claim 3
Dependent Claim
32 words
A device as claimed in claim 1, in which said optical sensor includes a diaphragm between said reflector and said circular scales, said diaphragm having an axis coincident with the common axis.
Claim 4
Dependent Claim
33 words
A device as claimed in claim 1, in which said optical sensor includes a diaphragm between said strobe lamp and said circular scales, said diaphragm having an axis coincident with the common axis.
Claim 5
Dependent Claim
38 words
A device as claimed in claim 1, in which said optical sensor includes a diaphragm between said one photo-multiplier tube and said strobe lamp, said diaphragm having an axis coincident with the axis of said one photo-multiplier tube.
Claim 6
Dependent Claim
62 words
A device as claimed in claim 1, in which said electronic measuring unit comprises: cathode followers including inputs connected to respective ones of said photo-multiplier tubes; amplitude detectors including inputs connected to respective outputs of said cathode followers; a differential amplifier including inputs connected to respective outputs connected to respective outputs of said amplitude detectors and an output connected to said meter.
Claim 7
Dependent Claim
26 words
A device as claimed in claim 5, in which said electronic measuring unit comprises an angle-range selector switch connected to the output of said differential amplifier.
Claim 8
Dependent Claim
15 words
A device as claimed in claim 1, in which said reflector is a light conduit.
Claim 9
Dependent Claim
37 words
A device as claimed in claim 7, in which said light conduit has the shape of a disc with a conical-spherical side surface and centrally located a cut-out whose surface has a conical or a spherical shape.
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) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |