1512530-A is referenced by 2 patents.
1512530 Wire support insulator AHI OPERATIONS LTD 30 Sept 1975 [1 Oct 1974] 39987/75 Heading H2C An insulating support comprises a part 4 slotted to receive a conductor and a sleeve 7 for insertion across the slot and for separating the fastener, e.g. nail 9, from part 4, the support being manufactured as a one-piece moulding, Fig. 1, and the sleeve being attached to the body by frangible sections 8. The body may have external corrugations. On striking the nail the frangible sections 8 fracture allowing the sleeve to enter the corresponding bore in the body, further blows completing the assembly as shown on Fig. 4,