Sighting apparatus with automatic correction mechanism

Details Sighting apparatus with automatic correction mechanism Sighting apparatus with automatic correction mechanism

1987-12-15

1989-06-20

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

33366, G01D 534

Patent

active

048411361

ABSTRACT:
A sighting apparatus comprising an optical system which includes a laser oscillator and an automatic correction mechanism mounted on a rotational table, wherein the laser beams from the oscillator are emitted in any horizontal direction by remote control. A circular air bubble tube is provide on the table such that the position of an air bubble in the tube is sensed by a photosensor to recognize the tilt of the table. When the tilt of the table exceeds an effective operation range of the automatic correction mechanism, an interrupter circuit is operated to interrupt a power source circuit for the laser oscillator.

REFERENCES:
patent: 1498177 (1924-06-01), Leonard
patent: 2592941 (1952-04-01), Moore
patent: 3863067 (1975-01-01), Gooley
patent: 4265027 (1981-05-01), Burniski
patent: 4333242 (1982-06-01), Genho, Sr.
patent: 4590680 (1986-05-01), Hanchett
patent: 4720920 (1988-01-01), Tudek

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