| 摘要 |
A pin switch which when actuated by a swingable door or other movable member breaks an electrical circuit. The switch includes a metal frame mountable on a panel and a hollow metal cylinder placed over a port in the frame and projecting from its rear. Received within the cylinder is the rear section of an insulation rod that extends through an end slot in the cylinder and terminates in a contact. The rear section is spring biased so that its contact normally engages the rear end of the cylinder which functions as the fixed contact of the switch, the switch then being closed. The front section of the rod projects forwardly from the port so that when it is pressed in by the door, the rod is axially displaced to effect disengagement of the contacts to open the switch. The front section of the rod is in a corrugated formation to define a series of equi-spaced annular grooves each marking an increment of rod length. In order to tailor the pin switch so that its effective length is appropriate to the requirements of a given installation, the user simply snips off the front section at the groove marking the desired length.
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