Wenderoth, Lind & Ponack
Electrical connector with a function of detecting interfitting engagement of connector housings
 An electrical connector with a function of detecting interfitting engagement of connector housings includes first and second connector housings fitted one into the other into interfitting engagement, a plurality of pairs of terminals disposed in the respective connector housings and electrically connected together upon the interfitting engagement of the first and second connector housings, a short-circuiting terminal usually urged so as to make a short circuit between at least two of the terminals disposed in the second connector housing, an actuator displacing the short-circuiting terminal upon the interfitting engagement of the first and second connector housings so that the short-circuiting terminal is departed from the terminals disposed in the second connector housing, and a pair of interfitting engagement detecting terminals disposed in the first connector housing so that a short circuit is made between them by the short-circuiting terminal when it has been displaced. 
Sumitomo Wiring Systems, Ltd.
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inventional additional inventional additional
Takeshi Masashi
Tsuji Saito