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:
Oct. 11, 1977
Filed:
Feb. 24, 1976
William J Schaad, Winnetka, IL (US);
Indak Manufacturing Corporation, Northbrook, IL (US);
Abstract
The illustrated switch comprises a casing, a push-button movable in the casing along a predetermined axis, fixed contact means disposed in the casing opposite the push-button and generally along such axis, an insulating carriage disc disposed in the casing and along the axis at an intermediate point between the push-button and the fixed contact means, the disc being movable toward and away from the fixed contact means, movable contact means mounted on the disc and movable therewith into and out of engagement with the fixed contact means for establishing and breaking an electrical circuit, a first compression spring disposed in the casing between the casing and the disc for biasing the disc and the movable contact means away from the fixed contact means, and a second compression spring disposed between the push-button and the disc for overcoming the strength of the first compression spring and moving the disc to bring the movable contact means into engagement with the fixed contact means when the push-button is moved toward the disc. The push-button is slidable in an opening in the casing toward the disc and into a position in which the push-button is flush with the casing. In this way, the force on the fixed contact means cannot exceed the force developed by the resilience of the springs, so that there is no possibility of damaging the switch by applying excessive force to the push-button. There is no possibility, for example, of pushing the fixed contact means out of the rear end of the casing.