Browse Prior Art Database

Combined Cover Support and Interlock Switch

IP.com Disclosure Number: IPCOM000042847D
Original Publication Date: 1984-Jun-01
Included in the Prior Art Database: 2005-Feb-04
Document File: 2 page(s) / 62K

Publishing Venue

IBM

Related People

Berlier, RA: AUTHOR [+2]

Abstract

A top cover hinge is combined with a spring clutch-type cover support and a membrane cover interlock switch. The cover support supports the cover in the open up position. The cover hinge is made of spring material so that it can reliably actuate the membrane switch without requiring adjustment. As shown in the figure, a top cover 11 is mounted to the movable part 13 of the hinge. The fixed portion 15 of the hinge is mounted to the body of the machine using screws 17. A membrane switch 19 is fastened to a back portion of the hinge, as shown in the drawing, and electrical contacts 21 are brought out for connection to the electronics.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 94% of the total text.

Page 1 of 2

Combined Cover Support and Interlock Switch

A top cover hinge is combined with a spring clutch-type cover support and a membrane cover interlock switch. The cover support supports the cover in the open up position. The cover hinge is made of spring material so that it can reliably actuate the membrane switch without requiring adjustment. As shown in the figure, a top cover 11 is mounted to the movable part 13 of the hinge. The fixed portion 15 of the hinge is mounted to the body of the machine using screws
17. A membrane switch 19 is fastened to a back portion of the hinge, as shown in the drawing, and electrical contacts 21 are brought out for connection to the electronics. The curved shape of the movable portion 13 of the hinge provides flexibility so that a screw head 23 can reliably operate membrane switch 19 before the cover is completely closed and the flex of portion 13 then permits the cover to close completely. In order to hold the cover in an open position, spring 25 is formed to operate as a spring clutch. Spring 25 is wound around hinge pin 27 to release from hinge pin 27 as the cover is opened, but grasp onto hinge pin 27 as the cover starts to return to its closed position. The friction force of spring 25 wound onto hinge pin 27 is adequate to support cover 11 in the open position but not so great as to prevent manual closing of cover 11. The loop of spring 25 is mounted under screw head 23 which provides a reduced area of pressure for reliable actu...