Patent GB-198465-A (GB)
Title: Improvements in locks
IPC: E05B63/04
Filed: 1922-03-14
Abstract: 198,465. Hill & Co., Ltd., J., and Tomkins, H. March 14, 1922. Reversible locks and latches; locks, with special means for operating bolts; locking sliding latches; lock mechanism, tumbler-type.-A reversible lock having one key-pin hole and a keyoperated vertically sliding or swivelling plate is provided with mechanism positively acting in both directions to transmit the movement of the sliding or swivelling plate to the dead bolt or the blocking bolt for the latch so that, with the lock in the unlocked position, the key may be turned in either direction to shoot the dead or blocking bolt. In the lock, Fig. 1, the key on being inserted in the wing F of the double-winged keyhole K is turned to the left and after raising the pivoted tumbler M the required amount engages in the slot J in the vertically sliding plate N so as to raise the plate N and with it the link 0 to cause the pivoted lever E to shoot the bolt D. A reverse movement of the key withdraws the bolt D. When the lock is reversed by turning it upside down the kev is inserted in the wing G of the keyhole K and turned to the right so as to raise the tumbler M and engage in the slot I in the slide N to move the slide and shoot the bolt D. A single-winged keyhole, shown in dotted lines may be employed. In the modification, Fig. 3, a peg O<2> on the lever E<1> engages directly in a slot S<1> in the slide N'. The sliding plate N may be replaced by a swivelling plate N<2>, Fig. 4, provided with projections P', P<2>, P<3>, which engage in their proper order in a recess T in the pivoted tumbler M<2>, the key acting to raise the tumbler so as to release the projection P<1> from the recess T before engaging in the slot J to rotate the plate N'. In modifications, the link O<3> is dispensed with, a peg on the lever E engaging in a slot in the swivelling plate similar to the slot S' in the plate N<1>, Fig. 3, the plate being pivoted either as shown in Fig. 4 or on the other side of the lever E. Fig. 7 shows a construction in which the link 0, Fig. 1, is replaced by a centrally pivoted link, a peg O<8> on which engages in a slot S<5> in the end of the bolt D<5>. The end O<7> of the link may be toothed to engage a rack on the slide N<5>, the peg O<8> engaging in a straight slot in the end of the bolt D<5> and in this case the slide may be replaced by a swivelling plate. In further modifications a swivelling plate of similar construction to the plate N<2>, Fig. 4, is provided with a peg which engages in a slot in the end of the dead 'bolt similar to the slot S<5>, Fig. 7, or a similarly shaped slot is provided in the plate in which engages a peg on one end of a centrally pivoted lever, the other end of which engages the end of the dead bolt. Fig. 13 shows a modified construction similar to Fig. 1, applied to an upright rim lock. In Fig. 14, the plate N pivoted at NC is provided on its underside with a pair of projections NP<1> which engage in slots TS in the end of the bolt D", rotation of the key in either direction causing one or other of the projections NP' to engage farther in its slot TS and shoot the bolt D". In the modification, Fig. 15, the edge NA of a projection on the slide N<12> coacts with the upper end of the pivoted lever E' to shoot the bolt D when the slide is raised, the edge NB coacting with the lever to withdraw the bolt when the operation is reversed. When the lock is reversed the edge NC of a projection en the upper end of the slide coacts with the lever E' to shoot the bolt, the edge ND of the projection coacting with the upper end of the lever to withdraw the bolt. In a modification of this construction, the bolt D may be provided with a turned-up forward end to coact with the head of the latch L to serve as a blocking bolt for the latch. The double-winged keyhole K may have a manually operable cover-plate adapted to cover up the wing of the keyhole not in use. Specification 2178/09 is referred to.