Timing system having infared start-stop gates

Details Timing system having infared start-stop gates Timing system having infared start-stop gates

1974-04-05

1976-01-13

Borchelt, Archie R.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250338, 250341, 324175, G01D 2104

Patent

active

039327469

ABSTRACT:
This highly portable, self-contained timing system includes photoelectronic start-stop gates which employ a pulsed invisible light beam as a means for communicating a condition of elapsed time and for aligning each gate.

REFERENCES:
patent: 2729288 (1956-01-01), Malott
patent: 2955209 (1960-10-01), Eckweiler, Jr. et al.
patent: 3619629 (1971-11-01), Matthews
patent: 3735260 (1971-08-01), Hartline et al.

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