Texas Instruments Corporation

Joe W Crawford

Glen C Shepherd

John Walter Orcutt

Felix Garcia

John T Hancock

James B Allen

Thomas Bileski

Carl N Johnson

Bobby D Blanton

James A Oursler

James William Tolson

Thomas Leon Gottbreht

An electrical switch actuatable upon the occurrence of a preselected level, includes a generally cup shaped, open ended housing which mounts therein a spaced pair of stationary contacts. The housing has two pairs of upwardly extending channels in its side walls, the two channels of the first pair aligned with the stationary contacts and the two channels of the second pair aligned with platform surfaces. An electrically conductive, flexible cruciform element is disposed in the housing with the distal end portions of two legs of the cruciform received respectively in the two channels of the first pair, and the distal end portions of the other two legs of the cruciform received respectively in the two channels of the second pair and resting on the platform surfaces. The stationary contacts may be disposed above or beneath the cruciform element for a normally open or normally closed switch as desired. The stationary contacts may lie in a plane parallel to the plane of the snap acting member or in planes which intersect each other and the plane of the snap acting member. A motion transfer pin extends between the snap acting member and the cruciform element and may be provided with a shoulder to prevent overtravel of the pin.

Condition responsive electrical switch having improved bridging contact

A universal adapter is mounted, in either of two directions, by way of a pair of pedestals disposed at its extremities to a planar surface, usually a heat sink. It has a cavity, formed at its upper surface and another at its lower surface between the pedestals each for receiving one of various types of power transistors and thyristors. A plurality of lead receiving apertures communicate between the lower and upper surface of the adapter to permit passage of the different configurations of leads from the various power transistors and thyristors. Electrical contacts for connection to exterior circuitry are affixed to the upper surface for some of the various types and to the lower surface for others of the various type. In either case, the contacts are positioned adjacent selected ones of the lead apertures through which the power transistor or thyristor leads are threaded and to which the electrical contacts are connected.

Power transistor and thyristor adapter

Thermostatic control apparatus comprising a switch, a switch body housing the switch, and an actuator arm extending from the switch body with the arm being movable between the first and second positions for opening and closing the switch. A thermostatic bimetal strip is spaced from the switch body, with one end of the strip being mechanically linked to the actuator arm. A support extends from the body for supporting the other end of the strip. A selectively operable adjustment cam engages the strip between its ends on the face of the strip adjacent the body, this cam being operable for adjusting the thermostatic strip to open and close the switch at various preselected temperatures. A spring biases the strip into engagement with the cam whereby changes in temperature of the strip cause the arm to move between its first and second positions thereby causing the switch to open and close.

Thermostatic control apparatus

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Dallas, TX, United States of America

Joe W Crawford