Patent GB-378468-A (GB)
Title: Improvements in or relating to hinged or like joints
IPC: E05D3/02
Filed: 1931-05-12
Abstract: 378,468. Indiarubber springs. HOUDAILLE, M., 50, Rue Raspail, and LECLER, C., 3, Rue Trezel, both in Levallois-Perret, Seine, France. May 12, 1931, No. 14050. Convention date, May 15, 1930. [Class 108 (iii).] A resilient joint comprises coaxial elements connected by a single mass of rubber secured to the elements, the parts of the rubber connected to the different elements being located at different parts of the axis. The rubber is rendered rigid with the joint members, preferably by glueing and compression in sockets. The joint is adapted to have a large angle of rotation, and may be used as a torsion spring ; means may be provided for varying the torsional stress in the rubber. In one form, Fig. 7, the joint comprises a socket 42 and a pin 38, preferably polygonal in section, connected by a rubber sleeve 40, which is secured at one end in the socket and at the other end on the pin. In the usual form the two parts to be connected have cvlindrical sockets and the rubber is in the form of a cylinder entering both sockets ; this form of joint may be reinforced by a pin passing through the rubber cylinder along its axis. This joint is shown in Fig. 2 applied as a door-closing device, in which one socket 9 is fixed to the door post and the other socket 12 carries an arm 13 having sliding engagement at its end with the door ; the rubber cylinder 11 is fixed inside both cylinders and is reinforced by a pin 15, and acts as a spring to close the door. The sockets are provided with steps, as shown in the lower socket, or other projections, or are of different internal diameters at their adjoining ends, as shown, to prevent sliding of the cylinder in the sockets. Separate washers of fibre or rubber, or flanges of the rubber cylinder, may separate the sockets. In a modification for a double door, another arm may be added on the lower end of the rubber cylinder in a similar manner to the arm 13, to close the other door. The torsional stress in the rubber may be varied by fixing the rubber cylinder 25, Fig. 4, to one socket and to a member 26 in the other socket 31, instead of both sockets, the member 26 being secured in any angular position by a pin 28, which may be spring- pressed, passing through a hole in the socket 31 into one of a series of holes in the member 26. The Specification as open to inspection under Sect. 91 (3) (a) also describes spring mountings for seats, and a mounting for a spring catch. In a seat mounting, Fig. 10 (Cancelled), each of the sockets mounted on the rubber cylinder 36 carries an arm having sliding engagement with the underside of the seat ; the arms 34, 35 of adjacent sockets extend in opposite directions ; the reinforcing pin 36a is secured on the seat supports. In a spring catch, Fig. 13 (Cancelled), a central pin 38 is fixed in the catch mounting, and the catch piece 43 is fixed in a rubber cylinder 40 secured on the pin, so that the catch may be pushed to one side against the spring action of the rubber in engaging or disengaging a staple or other part. This subject-matter does not appear in the Specification as accepted.