03-09-1943 дата публикации
Номер: GB0000555705A
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... 555,705. Latches. EREBUS MANUFACTURING CO., Ltd., JAMES, J. E., and GLOTHAM, A. June 13, 1942, No. 8103. [Class 44] In a latch or combined latch and lock the latch spindle carries a sprocket wheel in place of the usual follower and a chain or perforated belt meshing with the wheel serves to transmit retractive movement to the bolt. Fig. 1 shows the sprocket wheel F meshing with a chain G the ends of which are connected to rods H. H<1> slidable through the talons a<2> of the bolt tail and terminating in collars h bearing against the talons. Spring J, J<1> connected to these collars and to studs j, j<1> are in tension normally serving to keep the chain taut, in conjunction with the springs D, D<1> which shoot the bolt. Outward movement of the bolt is limited by the collars h and inward movement by a fixed stop E. When the sprocket wheel is rotated clockwise, rod H moves to the right, withdrawing the bolt, whilst spring J<1>, in taking up the slack of the chain, pulls rod H' idly to the left ...
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