GB191326182A - Improvements in or relating to Locks. - Google Patents

Abstract

26,182. Myers, M. Nov. 14. Keyholes, obstructing; key, r e t a i n i n g until bolt is operated.- The keyhole of a lock is covered by hinged spring-released shutters n, n<1>, held closed by a hook o on the outer s h u t t e r engaging a pivoted spring - pressed catch t, which can be disengaged by a pin or like implement r inserted through one of a number of similar holes s in an upstanding part of the front plate a. The key, when inserted into the barrel c connecting the front plate a with the lock casing, is further obstructed by pivoted shutters f, pressed together by springs h to cover the bore of the barrel. These shutters are separated by arms i which are rotated by the rods j, k, the latter terminating in a screw head l forming one of a number of similar screw heads m in the front plate a. The bolt 1 is preferably in two parts joined by crossbars 2 and guided by a bridge-piece 5<a> so arranged that it engages a gap in the key when the bolt is fully withdrawn and thus prevents the withdrawal of the key from the lock. In the application to a padlock, Figs. 10 and 12, an outer hinged shutter covers the keyhole and is released by a pin r operating a concealed catch 37. Access to the keyhole 28 is further obscured by a plate 30 having a keyhole 31 normally registering with a dummy keyhole 29, behind which a spring-controlled bar 39 may be mounted to move idly as the key rotates. A catch 32 holds the plate 30 until released by the pin r inserted obliquely through the keyholes 31, 29; the plate can then be moved to give access to the real keyhole 28. The various devices as applied to a padlock and an ordinary lock can be interchanged or employed in conjunction. Padlocks.-The shackle 14 of the padlock is pivoted at 20 and has flat euds 18 fitting the surfaces 19 of the casing closely, the bolt 23 engaging a tongue 21 depending from the shackle between the lugs 22.