| 摘要 |
<p>1527036 Latch SCHLEGEL (UK) Ltd 22 Feb 1976 [24 Feb 1976] 7207/76 Heading E2A A latch comprises a body 1 and a cover 2, Figs. 1 and 2. A hub 3 is pivotally mounted on the body 1 and has a hub-plate 20 pivotally connected to end 21 of a bolt member 6 by a pin 12. A spring 14 is attached to the bolt member 6 at 13 and is attached to the body 1. The bolt member 6 has a portion 23 for engaging a keeper (not shown) and has a pin 11 which abuts a retainer plate 7 that acts as a stop for the pin 11 when the bolt member 6 is in a fully closing position. A hub 4 has cam surfaces 28 and 35 the former being engaged by a lock bar 5 which is slidably located between lugs 29, 30 and is biased towards the cam surface 28 by a spring 15, whilst the latter is engageable with the portion 23 of the bolt member 6. The hubs 3 and 4 are actuable by handles (not shown). Inadvertent movement of the bolt member 6 to the position shown in Fig. 8 causes the portion 23 of the bolt member to engage the cam 35 and rotate the hub 4 so that the lock bar 5 disengages the plate 20 and its stop 31, thereby unlocking the mechanism. In a modification the retainer pin 7 is replaced by a plate 33, Fig. 7, having an internal cam surface 34 which acts as a guide and stop for the pin 11.</p> |
