Patent US3632192A successfully refreshed from Google Patents.
US3632192A
Expired / Lapsed
US
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Tuning fork light modulator
Assignee: PHILAMON Inc
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Filing: 1969-07-08
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Granted: 1972-01-04
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Expires: 1989-07-08
Abstract
Abstract There is disclosed a light modulating structure including an open-ended housing within which an electromagnetically driven tuning fork structure is supported. A source of light is located between the tines of the tuning fork. Apertured shutter members are secured to the ends of said tines intermediate the light source and the open end of said housing, relative movement of the shutter members causing variations in light intensity emitted by the light modulating structure. The tuning fork is of composite construction and is manufactured by a method which involves shaping at least two tuning fork tines to a desired thickness in a single machining operation before the two tines are separated and joined together symmetrically to form a composite tuning fork.
Inventors
- 👤 Boris F Grib
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:26
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; H; H02; H02K; H02K33/00; H02K33/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
142 words
Light modulating apparatus comprising a tuning fork including first and second tines, a tine junction portion and a heel portion, a light source intermediate of said tines emanating light energy in a direction substantially parallel to the axes of said tines, a first apertured member disposed in the path of said light energy from said light source including a first arcuately extending shutter plate formed with an aperture of predetermined shape therethrough, a second apertured member disposed in the path of said light energy from said light source, said second apertured member including a second arcuately extending shutter plate formed with an aperture of predetermined shape therethrough and spaced from said first shutter plate with a uniform gap therebetween, said first and second apertured members being secured to said first and second tines, respectively, and electrical means for driving said tuning fork.
Claim 2
Dependent Claim
142 words
Light modulating apparatus comprising a tuning fork including first and second tines, a tine junction portion and a heel portion, a light source intermediate of said tines emanating light energy in a direction substantially parallel to the axes of said tines, a first apertured member disposed in the path of said light energy from said light source including a first arcuately extending shutter plate formed with an aperture of predetermined shape therethrough, a second apertured member disposed in the path of said light energy from said light source, said second apertured member including a second arcuately extending shutter plate formed with an aperture of predetermined shape therethrough and spaced from said first shutter plate with a uniform gap therebetween, said first and second apertured members being secured to said first and second tines, respectively, and electrical means for driving said tuning fork.
Claim 3
Dependent Claim
91 words
Light modulating apparatus according to claim 1 further comprising a support member, and a platform of magnetic material secured to said support member, said tuning fork being secured to said platform and wherein said electrical means includes a drive coil mounted on said platform near the end of one of said tines, and a magnetic pickup coil mounted on said platform near the end of the other of said tines and permanent magnets mounted near the ends of each of said tines substantially coaxially with said drive and pickup coils respectively.
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) | 1975-01-03 | 1975-07-05 | 1976-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-03 | 1979-07-05 | 1980-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-03 | 1983-07-05 | 1984-01-04 | $7700.00 | Window Closed / Lapsed |