Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1995-05-16
1997-04-01
Westin, Edward P.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
25023114, 356363, 356395, 33 251, 31856816, 31856819, 901 15, 901 16, 901 47, G01B 1102, B25J 902
Patent
active
056169175
ABSTRACT:
A device for measuring an angle between pivotally connected, intersecting sides of a parallelogram includes a grating having a pattern of parallel, straight grating lines formed on a substrate, and a read head. The grating is mounted in a fixed position with respect to a first side of the parallelogram. The read head includes a sensor positioned for sensing displacement of the grating lines in response to an angular change between the intersecting sides of the parallelogram and generating a scale reading. The read head is mounted in a fixed position with respect to a second side of the parallelogram that is parallel to the first side. In one embodiment, the grating includes a single pattern of grating lines and is used to measure an angular change relative to a reference angle. In a second embodiment, the grating includes first and second grating patterns and is used to measure an absolute value of the angle between the intersecting sides of the parallelogram. The precision angle measuring device is particularly useful in coordinate measuring machines, but is not limited to such use.
REFERENCES:
patent: 1987773 (1935-01-01), Eppenstein
patent: 2438667 (1948-03-01), Hogue
patent: 2813346 (1957-11-01), Rachner
patent: 3703968 (1972-11-01), Uhrich et al.
patent: 3799678 (1974-03-01), Kerr
patent: 3982106 (1976-09-01), Stutz
patent: 4221953 (1980-09-01), Kiilunen
patent: 4329110 (1982-05-01), Schmid
patent: 4329111 (1982-05-01), Schmid
patent: 4341502 (1982-07-01), Makino
patent: 4509002 (1985-04-01), Hollis, Jr.
patent: 4744152 (1988-05-01), Roach et al.
patent: 4766675 (1988-08-01), Liu
patent: 4812104 (1989-03-01), Suzuki
patent: 4891889 (1990-01-01), Tomelleri
patent: 4894595 (1990-01-01), Sogawa et al.
patent: 4916822 (1990-04-01), Johnson
patent: 4939678 (1990-07-01), Beckwith, Jr.
patent: 4975016 (1990-12-01), Pellanc et al.
patent: 5180955 (1993-01-01), Karidis et al.
patent: 5181809 (1993-01-01), Martin
patent: 5189804 (1993-03-01), Ostachowski
patent: 5424833 (1995-06-01), Huber et al.
Brown & Sharpe Manufacturing Company
Lee John R.
Westin Edward P.
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