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. 17, 1990
Filed:
Jan. 24, 1989
Reinhard Deeg, Keltern, DE;
Standard Elektric Lorenz AG, Stuttgart, DE;
Abstract
A low-profile keyboard switch having an improved guide structure for guiding the vertical motion of the keys. Each key assembly comprises a guide member and a key including a keypad, a downwardly projecting central plunger and a downwardly projecting leg or skirt, the inner dimension of the leg or skirt being greater than the outer dimension of the guide member. The guide member is provided with a generally horizontal central opening adapted to receive the plunger and generally vertical peripheral walls which serve as a bearing surface for slide cams which project inwardly from the inner surface of the leg or skirt. Together the contact between the key, the central opening and the peripheral walls assure a vertical orientation for the key and a reduced resistance to key motion.