Omron Tateisi Electronics Co.

Kiyoshi Miyamoto

Kenji Ueda

Akio Masaki

Yoshio Moriyasu

Yasushi Matsuoka

An electronic switching device having a detection circuit or input circuit powered by an external source and load is described. The external source and load are in a series circuit with a power switching element which thereby provides switch controlled power in response to an output signal generated from a detection circuit. A current limiting device is connected in series with the power switching element, and an excess current detection circuit responds to excessive current flowing in the aforemention series circuit to interrupt the power switching element when an abnormally large current is passed. Circuitry is provided for holding the current limiting device in its operable or current interrupting state for a predetermined period of time.

Electronic switching device

An attachment for an electronic switch having an outlet tube in one embodiment includes a first clamp member including a pair of legs having respective hooks on ends thereof, and a second clamp member having a pair of locking pawls for locking engagement with the hooks, respectively. In a second embodiment the clamp members are identical with a leg and hook and a pawl on each member. The second clamp member having a pair of cavities in which the legs can be fitted, respectively, the first and second clamp members being connectable together to hold the outlet tube of the electronic switch therebetween. The first and second clamp members as connected together are slidable between a first position in which one of the first and second clamp members is displaced away from the other while being retained together by the hooks and the locking pawls and the outlet tube is rotatable between the first and second clamp members, and a second position in which the one of the first and second clamp members is pushed against the other and the outlet tube is fixed in position between the first and second clamp members.

Attachment for electronic switch

An electronic switch includes a detector head in the form of a rectangular parallelepiped having a detecting surface and connecting members disposed on a corner thereof including a surface opposite to the detecting surface, the connecting members being identical in shape when the detecting surface is oriented in either a forward or lateral direction, the connecting members being symmetrically arranged with respect to an edge of the detector head, a head joint having an end to which the detector head is connectable by the connecting members and also having a rotatable annular connector on an opposite end thereof, and a switch box having engagement means for slidable engagement with the annular connector of the head joint so that the head joint can be rotatably mounted on the switch box. The detecting surface can be oriented in all of lateral directions by rotating the head joint. Since the head joint can be rotated without detaching the detector head, the electronic switch can easily detect desired objects which may be differently positioned.

Electronic switch

A high frequency oscillation type proximity switch including an oscillating circuit having an adjusting resistor changing the oscillating state, the switch being adapted to detect an object by a decrease in the oscillation output due to the approach of the object, wherein when the oscillation output decreases, the switch detects the object while changing the resistance of the adjusting resistor to facilitate the restart of oscillation. Thus, when the object disappears after the detection of the object, oscillation is easily started, so that response to the detection of objects is improved. Further, by providing the output circuit with an integrating circuit having a time constant greater than the commercial alternating current, the oscillation is caused to be intermittent at the zero-cross point in the alternating current, thus making it possible to construct an anti-magnetic field type proximity switch which is usable even in an environment where an intense ac magnetic field is present.

Proximity switch with improved response time and antimagnetic field

A proximity switch comprising a detection coil, a first capacitor connected in parallel with the detection coil for forming a resonant circuit, an auxiliary coil, a second capacitor connected in parallel with the auxiliary coil for forming a resonant circuit, an oscillation circuit connected to the detection and auxiliary coils which are connected in series and in reverse winding directions, and an output circuit connected to the oscillation circuit for receiving variations in output generated from the oscillation circuit, the second capacitor having a capacitance larger than that of the first capacitor so that the second capacitor has a reduced low impedance at an oscillation frequency determined by the detection coil and the first capacitor.

Proximity switch with oppositely polarized coils

Electronic switching device comprising external terminals for connection with an external power source and a load, a detection circuit for generating a detection signal, a polarity switching circuit including an opto-coupler, and a power switching circuit for directly switching the load connected to the external terminals, said polarity switching circuit upon energizing or disenergizing the opto-coupler inverting the detection signal for application to the power switching circuit.

Growing community of inventors

Otsu, Japan

Kiyoshi Miyamoto