Patent GB-1205630-A (GB)
Title: Improvements in or relating to a latch for a motor vehicle door
IPC: E05B65/32
Filed: 1967-11-21
Abstract: 1,205,630. Latch fastenings. ETABS COUSIN FRERES. 21 Nov., 1967 [23 Nov., 1966], No. 52879/67. Heading E2A. A latch for a motor vehicle door, comprises a plate 1 supporting a guide 3 containing a buffer shoe 11 and having a base side 6 and two lateral sides 5, 7 extending from the base side, one lateral side 5 being in contact with a surface 27 of a keeper and the buffer engaging another surface 96 of the keeper when the keeper is in the latohing position, the keeper having two teeth 28, 29 which co-operate with a latch-bolt 17 which is rotatable in a partannular bearing 16 at one end portion of one lateral side of the guide, wherein the guide is made as a part separate from the plate, and wherein said latch-bolt comprises a substantially radial tooth 104 which extends from a sectorshaped portion of the bolt in such a way that two recesses 107, 108 are provided on opposite sides of the tooth and are adapted to receive respective teeth of the keeper in safety latching and full latching positions and wherein the latch-bolt has a ratchet portion 111 which is disposed on the side of the plate remote from the guide and which has three teeth 113, 114, 115 engageable in succession by a nose 116 of an internal operating lever 117 for holding the latch-bolt on an unlatching, and the safety latching and full latching positions which lever is biased into engagement with the ratchet portion by resilient means (121 not shown), for opposing rotation of the latch-bolt in a direction in which the keeper is disengaged from the guide. The keeper consists of a mounting plate 26 by which it is secured to the door fame, a neck 25a and a head 25, the guide 3 is open at one end to enable the head to enter the guide and the vertical wall 93 of the guide has a slot 95 which receives the neck to enable the head to enter the guide. In the safety latching condition the bolt tooth 104 is contained in therecess between the two teeth 28, 29 of the keeper and to enable the latch bolt to reach this position the tooth 28 of the keeper enters the recess 107 of the bolt, the keeper head rotating the bolt as it enters the guide; in the full latching condition the tooth 29 of the keeper is in the recess 108 of the bolt and a surface 110 of the sector shaped portion of the bolt, which defines one side of the recess, is in engagement with the end surface 99 of the tooth 29 which since the operating lever is in engagement with the tooth 115 prevents the keeper being withdrawn from the guide. During its entry into the guide 3 the keeper engages the buffer 11 and compresses it. The internal operating lever 117 is connected by linkage to an internal actuating member mounted on the inside of the door. There is also provided an external operating lever 126, the lever 126 is mounted on the same spindle 118 as the internal operating lever and has a slot in which is disposed a lug of the internal operating lever 117. The arrangement is such that movement of the external operating lever by a push button on the outside of the door through a link 128 also moves the internal operating lever via the lug and slot connection so that the nose 116 is removed from the latch bolt so that it can be moved to releasing position by a pull on the door but so that the internal operating lever can be moved to release the bolt by the internal actuating member without moving the external operating lever.