Patent GB-1273361-A (GB)
Title: Connecting devices
Inventor: PASBRIG M
IPC: A44B11/25
Filed: 1969-04-29
Abstract: 1,273,361. Releasable fastenings. M. PASBRIG. 29 April, 1969 [2 May, 1968; 17 July, 1968 (3); 25 Sept., 1968], No. 21892/69. Addition to 1,217,911. Headings E2A and E2B. A connecting device for releasably clamping a connecting element e.g. on electric cable, wire rope, chain or belts, comprises a housing having a first substantially rectilinear elongate recess to receive in use the connecting element; a slot in the housing which communicates wth the first recess such that the connecting element can be moved through the slot in a direction transversely to the longitudinal axis of the connecting element and inserted into the first recess; a clamping member in a second recess in the housing, which second recess communicates with the first recess, the walls of the first and second recesses forming clamping surfaces lying in a substantially wedge-shaped configuration; means for moving the clamping member out of its clamping position; and spring means to which the clamping member is tiltably connected directly or indirectly and which in use press the clamping member against the inserted connecting element, to clamp the connecting element against the clamping surfaces, the arrangement being such that a tensile stress applied to the clamped connecting element causes the clamping force to increase. As shown in Figs. 1-4, a telephone cable 701 is supported and tensioned on a pole 705 by a pair of clamping devices 702, 702. The cable is a twin cable, one section of which is used wholly for tensioning purposes and the other section of which is releasably clamped by a spring-loaded element 8 carried by a slide operated member 711 within a housing 706 of each device 702. The cable is engaged with the device through an opening along one side of the housing. In the arrangement according to Figs. 5 and 6 (not shown) the clamping element 8 is replaced by a serrated roller (716) and in Figs. 8 and 9 (not shown) a modified housing (719) is substantially U-shaped in cross sections and is closed by a clip on lever (721). In Figs. 10 and 11 (not shown) the opening along the housing of Fig. 3 is of curved and of zig-zag form respectively. A sleeve (725) Fig. 12 (not shown) may be used for closing the opening along the housing. In another arrangement, Fig. 13 (not shown) a housing (726) is enclosed by a rotatable split sleeve (725). In a further arrangement, Fig. 14 (not shown) a housing (731) is provided with a sleeve (727) which when moved longitudinally, also rotates to cover or uncover part of the opening for the cable. In Fig. 15 (not shown) the devices 702, 702 are combined in a unit by means of which the cable (701) may be tensioned in opposite directions. In another arrangement, Fig. 16 (not shown) accidental release of the clamping element is prevented by a leaf spring (405), supplemented by a permanent magnet 407. The clamping element is releasable manually by means of a button 346. In the arrangement according to Figs. 17b a belt buckle comprises a two-part housing 940 for non-releasably retaining a belt portion 903 and for releasable connection of a belt portion 904 which is engageable laterally of the housing through a slot 941. Actuating members 942 operated a slide 946 against a spring 943 to release clamping elements 12, 13 from the belt portion 904. The arrangement may be applied to a sling (4) Fig. 18 (not shown). In a further arrangement Fig. 19 (not shown) the housing is part cylindrical and allows through passage of a cable inserted sideways of the housing. According to Figs. 20, 21 (not shown) the device according to Fig. 19 is modified in that the clamping element is releasable by means of a slidable slotted bush (130) which co-operates with a pin (134), Fig. 20, associated with a loading spring (108) for the clamping element. In Fig. 21 an additional clamping element (137) projects through the housing. Various forms of clamping element and loading spring arrangements are described with reference to Figs. 22-28b (not shown). In the arrangement according to Fig. 29 (not shown), a seat belt buckle, similar to that of Figs. 17a, 17b is releasable by means of a slidable sleeve (130) which is operated against a block of resilient material (108). Specification 50485/71 and 52178/71 are referred to.