Resilient mounting for piezo-electric body

851,037. Piezo-electric crystal mountings. TELEFUNKEN G.m.b.H. July 2, 1959 [July 25, 1958], No. 22831/59. Class 40(8). A mounting arrangement for a piezo-electric crystal disc provides at least three spaced supports for the edge of the disc, at least one of the supports comprising a wire coil within which is a rubber, rubber-like or plastic member. The disc I is of the knife-edge chamfered type and is held by two resilient wire supports 3 within a slotted base member 8 of resilient material. The ends of wires 3 are formed into coils 4 within which are arranged lengths of plastic sleeving. The pitch of the coils is such that the edges of the disc may lie between two adjacent turns and rest against the sleeving. The coils 4 are drawn towards each other by a wire loop 6 (or two separate lengths of wire) which passes through the sleeving. The ends of the loop are twisted together and the tension regulated either by adjusting the twist or by kinking or bending the wire. The radius of curvature of the bottom of the slot in member 8 is made greater or less than the radius of the disc according to whether it is desired to provide one or two points of contact for the disc. The slot may extend completely through the member 8. The lower ends of support wires 3 are twisted around and soldered to the ends of pins 2.