Browse Prior Art Database

Keyboard Assembly Device for Shifting Keytop Row Positions

IP.com Disclosure Number: IPCOM000047897D
Original Publication Date: 1983-Dec-01
Included in the Prior Art Database: 2005-Feb-08
Document File: 3 page(s) / 70K

Publishing Venue

IBM

Related People

Miles, AW: AUTHOR [+2]

Abstract

Fig. 1 illustrates, in cross section, an arcuate keyboard in which rows of key buttons 1 have been assembled to a number of key actuator housings 2 mounted on the curved baseplate 3. Key buttons 1 are initially held in holding fixtures 4 which are individual room temperature vulcanizing soft, flexible rubber material. Each fixture 4 has an impression 5 forming a recess in the shape of a key button 1 in its inverted position. The holding fixtures 4 are secured to shiftable support rails 6. Each support rail 6 has a shoulder screw 7 which is inserted through meshing slots in two shifting plates 8 and 9. A shift mechanism lever 10 and handle 11 operate with a large pivoting junction with shoulder screw 12 to move the shifting plates 8 and 9 relative to each other.

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Keyboard Assembly Device for Shifting Keytop Row Positions

Fig. 1 illustrates, in cross section, an arcuate keyboard in which rows of key buttons 1 have been assembled to a number of key actuator housings 2 mounted on the curved baseplate 3. Key buttons 1 are initially held in holding fixtures 4 which are individual room temperature vulcanizing soft, flexible rubber material. Each fixture 4 has an impression 5 forming a recess in the shape of a key button 1 in its inverted position. The holding fixtures 4 are secured to shiftable support rails 6. Each support rail 6 has a shoulder screw 7 which is inserted through meshing slots in two shifting plates 8 and 9. A shift mechanism lever 10 and handle 11 operate with a large pivoting junction with shoulder screw 12 to move the shifting plates 8 and 9 relative to each other. This adjusts the position of the holding fixtures mounted on rails 6 by shifting the position of rails 6 slightly. The center rail, designated 6C, does not shift, but the rails symmetrically located on either side of it shift by varying amounts to accommodate the arcuate position of the key actuator housings 2 on the baseplate 3. The flexible room temperature vulcanizing rubber material, which the holding fixtures 4 are made of, flexes slightly to allow the angular difference between the housing axis and the recess or pocket axis 5 in each holder to become aligned when the baseplate 3 is thrust downward toward an array of key button caps resting in the recesses 5 prior to assembly. Figs. 2A and 2B illustrate how the shifting plates 8 and 9 move to shift the positions of the center lines of the shifting rails 6. Fig. 2A illustrates the position when the keytops 1 would be inserted within the recesses 5 when all of the rails 6 are on equal center-to-center spacings. The center rail 6C has its center line denoted in Fig. 2B as 6CL. The center lines of the other rows of keys are designated simply as CL. It will be observed that each shoulder screw 7 rests within two slotted apertures 13 and 14. The aperture slots 13 are angled with respect to horizontal by an amount that varies depending on whether the slot 13 is at the center line 6CL or center lines that are further removed from the center. In Fig. 2A, the shifting rails 6 and the holding fixtures 4 have been removed from the view...