GB274497A - Improvements in automatic locking devices - Google Patents

Abstract

274,497. Tecalemit, Ltd., (Assignees of Soc. Anon des Etablissements TÚcalÚmit). July 15, 1926, [Convention date]. Stud-and-slot fastenings; catches yielding to pull and pressure.-A fastening for motor-bonnets and like articles comprises a member protruding from the bonnet flap guided into engagement with a pivoted member o members on the chassis, such member or members being actuated by a spring secured at one end to the chassis and at the other to a point on the member other than its pivotal axis. In the form shown in Fig. 1, the flap 1 carries a handle 3 on the outside and a projection 2 on the inside having a bar 6 which can enter guide slots 16 in the limbs of a U- shaped bracket 8 bolted to the chassis. In entering, the bar engages the edge 13a of a slot in a member 13 pivoted at 12 between the limbs of the member 8, causing the member 13 'to rock until the spring 15, anchored to the bracket 8 at 11 and to the catch 13 at 14, passes its dead centre when the edge 13<b> presses on the upper side of the bar 6 and secures it. Pulling on the handle 3 reverses the action and releases the flaps. In the form shown in Figs. 3, two catches 13, hinged together at 21 and slidably hinged to the bracket 8 by pins 12 and slots 20 are employed. As the flap is closed, the bar 6 pushes the pivoted bar 21 inwards until the springs 15 pass their dead centres, when they pull the limbs 13<b> of the catches over the bar 6 to secure it. Release is effected by a strong pull on the handle. In the form shown in Fig. 5, 'the securing member 13 is held in inoperative position by the limb 25<a> of a catch 25 pivoted to the bracket 8 at 26. As the projection 2 on the flap enters between the limbs of the bracket, the bar 6 trips the catch 25 and the spring 15 pulls the member 13 over the bar, securing it until a strong upward pull is exerted on it. The Specification as open to inspection under Sect. 91 (3) (a) comprises also the forms shown in Figs. 7 (Cancelled), 9 (Cancelled), and 10 (Cancelled). In the form shown in Fig. 7 (Cancelled), the projection 2 is in the shape of a bent rod with a mushroom head 6 adapted to enter a hole, 30 in the cylindrical bracket 8. In entering the head engages the limb 36<a> of the catch 36, rocking it on. its pivot 35 and disengaging the slide 37<a> of its head 37 from a fixed shoulder on the bracket, and causing the other side 37<b> to engage the head 6, release being prevented by the pushing of the head 6 into 'the socket so that the head 37 is not opposite the shoulder. The catch 36 is pivoted on a spring-urged pivoted arm 31 to permit this. Release is effected by an upward pull. In the form shown in Fig. 9 (Cancelled), the head 6 is T-shaped and each limb of the T-shape is forced down the inclined heads 43 of pivoted catches 40 until they snap behind them. The handle, Fig. 10 (Cancelled) is formed by two symmetrical stampings 3a, 3<b> joined by a rod 18 and sleeves 19. This subject-matter does not appear in the Specification as accepted.