Boots – shoes – and leggings
Patent
1984-10-31
1987-12-29
Gruber, Felix D.
Boots, shoes, and leggings
33 1PT, 33366, 250231SE, G01C 100, G01C 900
Patent
active
047165340
ABSTRACT:
An angle finder (10) and level (40) are disclosed. The level (10) and angle (40) have digital displays (17) which provide a visual, numerical representation of the angular alignment of a reference surface in relation to a gravitational vector. Angle finder (10) and level (40) are controlled by a microprocessor (19). A disc enclosure (18) contains a rotatably mounted disc (23) on which is mounted a weight (26). Weight (26) keeps disc (23) in a relatively constant position relative to the gravitational vector. Also mounted in the disc enclosure (18) are photodetectors (27), (28) and (29). Disc (23) contains markings (30) which, in the disclosure of this application, each represent two degrees of arc. The three photodetectors (27), (28) and (29) sense the movement of markings (30) and by logical computation microprocessor (19) determines the angular alignment of the reference surface. In another embodiment of the invention, a disc enclosure ( 18') includes u-throat detectors (60), (61) and (62) which count the passage of markings (55) on a transparent disc (50) in the manner described above.
REFERENCES:
patent: 3591842 (1971-07-01), Seewald
patent: 3689160 (1972-09-01), Shimulenis et al.
patent: 4194184 (1980-03-01), Hartmann et al.
patent: 4263506 (1981-04-01), Epstein
patent: 4467527 (1984-08-01), North et al.
Baucom D. Michael
Gomez Sergio V.
Adams, III W. Thad
Gruber Felix D.
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