Proximity switch mounting apparatus

Claim 1

In a proximity switch of the type having a J-shaped channel formed on a side thereof engaged with a tie-rod extending between heads secured to each end of a fluid operated, expansible chamber cylinder and a plurality of externally threaded fastening devices engaged with a plurality of threaded bores formed in said proximity switch and extending through the longer side of the channel, wherein the proximity switch is positioned on the cylinder by engaging the tie-rod in the channel, the improvement which comprises a mounting device having: a block shaped member with at least a first concave arcuate surface, the degree of curvature of which surface fitting the degree of curvature of the surface of the cylinder; an extension formed on a surface of the block shaped member adjacent the arcuate surface; and a plurality of bores corresponding to the plurality of threaded bores formed in the proximity switch, said plurality of bores being formed through the extension and engaging the plurality of fastening devices, wherein the plurality of bores formed through the extension are aligned with the plurality of threaded bores formed in the channel of the proximity switch and the fastening devices threaded through the aligned bores to position the proximity switch with respect to the cylinder by engagement of the tie-rod in the channel, and the fastening devices are tightened down to cause the arcuate surface on the mounting device to securely engage a portion of the surface of the cylinder, thereby providing a secure, vibration resistant mounting of the proximity switch to the cylinder.