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:
Sep. 12, 1989
Filed:
Jun. 25, 1987
Hans Halm, Herne, DE;
Confon AG, , CH;
Abstract
The telephone index has a plurality of selection keys and a spring-operated drawer witha stack of index cards, which is held in the index housing by means of a locking device in such a way that on operating a selection key the drawer locking means is released and consequently the drawer with the selected index card and the index cards below it is extended, while the index cards located above the selected card are held back in the index housing by means of a card hold-back device released by the operated selection key and is constructed in such a way that the unlocking of the drawer on operating a selection key takes place by a drawer position change in such a way that in its front region the drawer is lowered counter to the tension of a spring element and simultaneously the drawer locking means is released on the upper edge of the housing opening for the drawer, so that the drawer can be extended, the drawer locking means comprising a stop cam shaped onto the upper edge of the front drawer terminal ledge and which ensures that in the inserted state the drawer is held in the index housing.