H - Electricity – 01 – H
Patent
H - Electricity
01
H
26/120, 306/304
H01H 13/04 (2006.01) H01H 3/12 (2006.01)
Patent
CA 1275673
ABSTRACT OF THE DISCLOSURE A vandal resistant push button assembly, and a method of constructing same, in which excess force applied to the button is transferred via a metallic halo into a metallic face plate. The exposed surfaces of the button and halo are spherical, having the same center and radii, providing a smoothly blending curved surface which contin- ues to just below the plane of the exposed face plate surface. A shoulder in the face plate for supporting the halo and enabling the exposed halo surface to enter the plane of the face plate surface is formed by metal dis- placement, as opposed to metal removal, enabling the required mechanical strength to be achieved with a thinner face plate.
512385
Martin Adolf Heinrich
Ag Inventio
Riches Mckenzie & Herbert Llp
LandOfFree
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