Patent GB-747102-A (GB)
Title: Improvements in or relating to remote control mechanisms particularly for gates
Inventor: THOMAS JOHN DENBIGH
IPC: E05F13/04
Filed: 1953-06-25
Abstract: 747,102. Gate operating mechanism; gate stops and holders. THOMAS & CO. (OSWESTRY), Ltd., E. June 25, 1954 [June 25, 1953], No. 17608/53. Class 65 (1). [Also in Groups I and XXIV] Two vehicle-actuated members 22, Fig. 1, operate in opposite directions, mechanism 21 comprising a slidable member 34, Fig. 6, connected to the gate 10 and oppositely-acting pawl and tooth or notch mechanism arranged for the transmission of movement from the members 22 to the member 34, the arrangement being such that in the neutral position of the member 34 there are teeth or notches and pawls in operative position for movement of this member in either direction and after such movement there is a tooth or notch and pawl in operative position for movement of the member 34 in the reverse direction ; movement of the member 34 in either direction opens the gate and its return to the neutral position closes it, so that the gate is opened by actuation of either one of the members 22 and is closed by actuation of the other one. In the arrangement shown in Fig. 1, the mechanism 21 is connected by a rod 20 to a lever 15 which is pivoted to the gatepost at 14 and pivotally carries the heel of the gate, so that operation of the mechanism causes tilting of the hinge axis of the gate and consequent swinging of the gate in one directon or the other. Each member 22 preferably comprises a central part, rigid with a crank pivoted on a horizontal axis, and inclined parts hinged to the central part and slidably supporetd at their outer ends ; the crank is connected to a flexible cable on which it exerts a pull when the member 22 is depressed. The cables 28, 28<SP>1</SP>, Fig. 6, from the respective members 22 are connected to pawls 43, 44 pivotally and slidably supported by pins 45 in slots 46 and provided with stops Sand dashpots 47. The sliding member 34 has notches 35 ... 38 and a camslot 42 engaged by a roller 50 on a crank 51 pivoted at 52 and connected by the rod 20 with the gate-supporting arm 15 ; a spring-loaded detent 40 locates the member 34 in its neutral position. Depression of a member 22 by an approaching vehicle moves the rod 28 or 28<SP>1</SP> to carry the member 34 to the left by pawl 43 and notch 36 or to the right by pawl 44 and notch 37, in either case moving the rod 20 in the gate-opening direction and bringing notch 38 adjacent pawl 44 or notch 35 adjacent pawl 43, as the case may be, for return of the member 34 to the position shown by the depression of the second member 22. The gate is held closed by a latch 55, Fig. 1, engaging a keeper 54, and is held open by the latch engaging a keeper 60 on a post at the roadside, leaf springs 57, 61 engaging a pin 58 on the gate to buffer its movements and start the return movements ; release of the latch from either keeper is effected by the lifting of the free end of the gate which occurs when its hinging axis is tilted to initiate its opening or closing movement respectively. The cables 28, 28<SP>1</SP> may be replaced by hydraulic, pneumatic, or electromagnetic means. Specifications 691,749 and 722,393 are referred to.