Apparatus for applying radiant beam

Details Apparatus for applying radiant beam Apparatus for applying radiant beam

1981-01-30

1982-10-26

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

141 1, G01J 120

Patent

active

043563945

ABSTRACT:
Apparatus for applying a radiant beam against an opaque diaphragm (18) to melt an aperture in the diaphragm (18). Bracket means (12) are provided for positioning the diaphragm (18) at a predetermined position, along with a source of the radiant beam (20) and electric circuit means (21) for activating the source (20). Photocell means (52) may be positioned whereby a properly positioned diaphragm (18) initially shades the photocell (52) from the beam, and the beam strikes the photocell (52) when the aperture is formed. Means are provided to shut off the radiant beam responsive to the beam striking the photocell (52). The photocell (52) may be positioned in a pivotable switch arm (46), and the radiant beam source (20) may be a special filament-type light bulb (20) with a focusing reflector (24).

REFERENCES:
patent: 4157723 (1979-06-01), Granzow et al.

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