Abstract: A tool adapted to simultaneously heat a plurality of spaced electrical elements for soldering includes a rigid low conductivity metallic strip connected between and holding first and second relatively massive high conductivity bars in spaced, parallel relation. The lower portion of the elongated metallic strip is shaped to extend from the bars and contact the elements to be soldered. Electrical current is applied between one end of the first bar and the opposite end of the second bar and is directed through a metallic strip transverse to the elongated dimension. Upon discontinuation of the electrical current, the relatively massive bars rapidly remove heat from the metallic strip.

Abstract: A multiplane terminal block adapted to provide rearrangeable electrical connections includes a plurality of spaced insulating terminal posts extending outwardly on one side of a rectangular block of insulating material. A conductive element fixedly inserted into each post protrudes through the block and provides a rearrangeable clamp connection to an electrical conductor at the top of the post and a fixed connection to an electrical conductor on the other side of the block. Each terminal post is of a different length than the immediately adjacent terminal posts whereby a relatively long path between conductive elements with close spacing between adjacent posts is provided.

Abstract: An actuator controlled switch mounted on an electronic component module is operative to remove electrical power from the module during plug-in or removal of the module from a support frame. A latch and the actuator are pivotally mounted in parallel relation on the module and the latch is urged against a fixed support frame member. During plug-in and removal, a lateral extension of the latch forces the actuator to hold the module switch off. When the module is fully engaged, the latch is removably displaced from the actuator whereby the actutor can be pivoted to turn the module switch on and off.