Photoelectric switch

A photoelectric switch comprising a light projecting segment including a pulse oscillator and a light-emitting element adapted to give a pulse light emission in response to an output pulse of said pulse oscillator, a light reception segment including a light reception element adapted to yield a light reception signal on incidence of light, a gate circuit adapted to gate said light reception signal according to said output pulse of said pulse oscillator and a control circuit for delaying a next pulse by stopping temporarily the action of said pulse oscillator in response to a light reception signal generated from said light reception element during a period where there is no pulse output from said pulse oscillator.

A photoelectric switch comprising a light projecting segment including a pulse oscillator and a light-emitting element adapted to give a pulse light emission in response to an output pulse of said pulse oscillator, a light reception segment including a light reception element adapted to yield a light reception signal on incidence of light, a gate circuit adapted to gate said light reception signal according to said output pulse of said pulse oscillator and a control circuit for delaying a next pulse by stopping temporarily the action of said pulse oscillator in response to a light reception signal generated from said light reception signal during a period immediately before generation of a pulse from said pulse oscillator.

A photoelectric switch comprising a light projecting segment including a pulse oscillator and a light-emitting element adapted to give a pulse light emission in response to an output pulse of said pulse socillator, a light reception segment including a light reception element adapted to yield a light reception signal on incidence of light, a gate circuit adapted to gate said light reception signal according to said output pulse of said pulse oscillator and a control circuit for advancing the timing of generation of a next pulse by quickening temporarily the action of said pulse oscillator in response to a light reception signal generated from said light reception element during a period immediately following generation of a pulse from said pulse oscillator.

A photoelectric switch comprising a light projecting segment including a pulse oscillator and a light-emitting element adapted to give a pulse light emission in response to an output pulse of said pulse oscillator, a light reception segment including a light reception element adapted to yield a light reception signal on incidence of light, a gate circuit adapted to gate said light reception signal according to said output pulse of said pulse oscillator and a control circuit for shortening the pulse frequency of said pulse generator in response to the output of said gate circuit.