Transit

Details Transit Transit

1985-06-10

1987-02-24

Stearns, Richard R.

Geometrical instruments

Miscellaneous

Light direction

33 1PT, 33285, G01C 1106

Patent

active

046446591

ABSTRACT:
A transit includes a first rotational member provided with a collimator and supported on the transit for rotation about a predetermined axis, a second rotational member supported on the transit for rotation about the predetermined axis, a detector for generating a pulse in accordance with a predetermined angle of displacement between the first rotational member and the second rotational member, a first counter for counting the number of pulses from the detector, the maximum countable pulse number of the first counter corresponding to the angle of 360.degree., the first counter generating a pulse in accordance with its counting of the maximum pulse number, and a second counter for counting the pulses from the first counter means up to a predetermined number.

REFERENCES:
patent: 3826318 (1974-07-01), Baumgartner
patent: 4093383 (1978-06-01), Feist et al.
patent: 4095348 (1978-06-01), Kramer
patent: 4129862 (1978-12-01), Kaplan et al.
patent: 4281463 (1981-08-01), Kobayashi et al.
patent: 4318225 (1982-03-01), Jenkinson
patent: 4358753 (1982-11-01), Cascini
patent: 4466189 (1984-08-01), Tobin, Jr.

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