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Circuit Arrangement For Electric Light Sources In General
(AREA)
Abstract
Pseudo-semaphore didactic apparatus characterized in that the electrical operating scheme consists of three lamp sockets connected in parallel mounted on the front face of a support that receives them vertically located facing each other round windows provided with crystals respectively of the colors of the used in conventional traffic lights. This occasion goes to one of the poles of the battery current socket. The other socket passes to a manual control equipped with four pressure switches housed in two sockets connected in parallel with the conductor that is born in the aforementioned outlet. Of the four push buttons three of them close circuit respectively when pressed with the leads of the lamp sockets of the cited support. (Machine-translation by Google Translate, not legally binding)