437297-A is referenced by 1 patents.

437,297. Expansion sockets. PHILLIPS, N., Karachi, Upton Road, Bexleyheath, Kent. April 27, 1934, No. 12770. Addition to 367,547. [Class 89 (i)] In a wall expansion socket as described in the parent Specification, the expansible member 3 is provided with longitudinal slits 4 to facilitate its expansion. The member is also provided with recesses 9 for the reception of an angled bolt head. On tightening the bolt the angles bite into the walls of the recess and prevent the socket 3 from turning.

Improvements in expansion sockets for bolts for building and engineering purposes
Application Number
GB19340012770 19340427
Publication Number
437297 (A)
Application Date
April 27, 1934
Publication Date
October 28, 1935
Noel Phillips
F16B 13/06
F16B 13/04
F16B 13/08
F16B 13/06
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