Patent GB-1139295-A (GB)
Title: Improvements in or relating to fastenings
Inventor: HURREN ALBERT EDWARD
IPC: E01B9/30
Filed: 1965-07-17
Abstract: 1,139,295. Spring clips, ceilings; securing railway rails, domed skylights. COLT VENTILATION & HEATING Ltd. 12 July, 1966 [17 July, 1965], No. 30458/65. Headings E1G. E1R, EIW and E2B. A fastening comprises two members 13, 20 which interlock with each other with a resilient snap action to grip an object interposed therebetween, each member being generally L- shaped comprising a limb for gripping said object and a limb having means for interlocking with interlocking means of the other member, so as to hold the members against separation both longitudinally of the gripping limbs and longitudinally of the interlocking limbs, and at least one of the members being resiliently deformable, so that in use resilient deformation occurs as the members are brought into interlocking relation with a snap action and is maintained by the reaction of the gripping force to hold the members in such interlocking relation. In the construction shown the shorter limb of the member 20 is of boxsection and it is a loose sliding fit on the shorter limb of the member 13 when the shorter limbs are in parallel disposition. The upper free end portion of the shorter limb of the member 13 is inturned to provide a sharp internal corner 19 which engages an end face of the box-section limb to interlock the two limbs together. The fastening is shown connecting the parts of a roof light together, the fastening holding a dome 11 of glass or other suitable material to a ventiliated upstand 10; the longer limb of the member 13 is fixed to the upstand by a bolt and nut so as to lie under the dome 11 with its short limb upstanding beyind the edge of the dome; the dome is then placed in position on the member 13, its edge portion being protected by asbestos tape 22 and a rubber sealing strip 16 being provided between the dome 11 and the upstand, and the member 20 of the clip is pressed home over the upstanding limb of the member 13 until the two members interlock, the long limb of the member 20 being deflected while it is being pressed home. The corners of the long limb of the member 13 adjacent the bolt are lipped to bite into the upstand and prevent angular movement of the member 13 about the bolt. In a modification each of the shorter limbs is slotted so that a tool can be inserted through the slots to disconnect the two limbs so that the two members can be parted. The fastening can also be used for fastening a ceiling panel to a joist; in the case of a wooden joist the member 13 is screwed to the joist but in the case of a metal joist, two fastenings are used one fastening holding the second fastenings to the joist and the second fastening engaging the sealing panel. The fastening can be modified to hold two or more sheet form parts together by providing each of the long limbs of the members with prongs which bite into the sheet form parts. In a further construction Fig. 8 the fastener is modified to hold a rail to a concrete sleeper, the member corresponding to the member 13 having swaged lugs which are grouted into the sleeper to attach the member to the sleeper and the member 75 which corresponds to the member 20 engaging the rail; the member attached to the sleeper has the free end portion of the longer limb upturned and inturned to locate the rail laterally.