Patent GB-644050-A (GB)
Title: Improvements in or relating to door lock mechanisms
IPC: E05B65/32
Filed: 1947-07-24
Abstract: 644,050. Locks. HOUDAILLE-HERSHEY CORPORATION. July 24, 1947, No. 19887. Convention date, March 8, 1946. [Class 44] Door latching and locking mechanism, particularly for automobile doors, comprises a rotary locking bolt engaging with a keeper, a take-up lever pivoted at one end, a rotor locking lever pivotally mounted on the rotary bolt for engagement with the take-up lever, a spring acting on the rotor locking lever and urging it into engagement with the take-up lever, when the bolt is engaged with the keeper, a rotatable dogging lever supporting the free end of the take-up lever when the bolt is in latching position and having a safety-catch arm engageable with a keeper, a roll-back lever arranged for retracting the dogging lever, and a lever rockable parallel to the door edge for operating the roll back lever to retract the dogging lever. The mechanism is mounted on a plate bent to form two parts, 10, 50, Fig. 2, at right angles. A lever 11 is pivoted on a pin 12 on the plate 10, and is rotated clockwise by a push-rod 15, or by a link 21 connected to an inside handle, to lock the mechanism. The pin 21 also carries the rollback lever 22, which is rotated counterclockwise, either by the link 21, a slot in which engages a pin 23 on the roll-back, or by a lever 28 operated by a push-button, to unlock the mechanism. The dogging lever 30 has a tongue 31 cooperating with a tongue 26 on the roll back lever 22, and a latching arm 32 actuated by a ramp on the striking plate, and is biassed by a spring 33 to resist clockwise rotation. The locking lever 40 is mounted coaxially with the lever 30, but independently thereof, on a square spindle 41 operated by a key, the locking lever having a circular boss working in a bore in the lever 30 which has a boss working in a bore in the plate 10. Arms 43, 44 of lever 40 extend on either side of a lug 14 on the lever 11, and lever 40 is held in either of two positions by a spring 47 engaging in notches. The rotary locking bolt 56, Figs. 2 and 6, is mounted on a pin 57 in a housing 55 secured to the plate 50 of the casing, and carries a stud 62 on which is pivoted the rotor locking lever 80, Fig. 5, which is biassed to rotate counter-clockwise by a spring and has a tongue 86 to engage the notched or serrated edge 85a of the holding and take-up lever 85. The lever 85 has an arm 87, extending through a slot in the plate 10, which rests on the dogging lever 30 when the latter is in the dogging position of Fig. 2. A push button lever 28, Fig. 5, is pivoted on a pin 82 on the plate 50, over take-up lever 85, and biassed to rotate counterclockwise by a spring. An offset end 28b makes contact with a push-button 100, Fig. 1, forming part of the assembly of the door handle 104. Depression of the button 100 causes an arm 29, Fig. 5, of the lever 28 to contact the arm 28 of the roll-back lever 22 to rotate the latter counter-clockwise to unlatch. In latching, the housing 55, Fig. 6, with the arm 60 of the rotary bolt 56 projecting from its open upper side, enters the channel 111 of the keeper K, and the downward projection 112 of the upper wall rotates bolt 56 to the position of Fig. 8, while the lower ramp 114 lifts the safety-catch arm 32 of the dogging lever 30, Fig. 2. As the bolt 56 rotates to the position of Fig. 8, rotor locking lever 80, Fig. 5. is raised bodily and rotated until tongue 86 thereon engages the serrated surface of take-up lever 85. thus locking the bolt, and the action of the biassing springs tends to force tongue 86 along the surface. To unlatch, the roll back lever 22 is rotated, in counter-clockwise direction as seen in Fig. 2, either by the outside push-button acting through the lever 28, or by the inside handle through the link 21, causing the dogging lever 30 to rotate clockwise. The take-up lever 85 is thus released, and safety-catch arm 32 is lifted. The mechanism can be locked in three ways: (1) By rotating the locking lever 40 by means of a key lock on the spindle 41 so that the arm 43 comes under the arm 29a of the push-button lever; (2) by turning the inside handle clockwise to move the lever 11 by contact with a lug 20 on the link 21, the lever 11 then moves the locking lever 40 by contact with the lug 14; or (3) by rotating lever 11 by means of the push-rod 15.