The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 18, 1989
Filed:
Jul. 10, 1985
Adolf H Martin, Glenview, IL (US);
Adams Elevator Equipment Co., Skokie, IL (US);
Abstract
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 continues 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 displacement, as opposed to metal removal, enabling the required mechanical strength to be achieved with a thinner face plate.