Browse Prior Art Database

Machine Enclosure

IP.com Disclosure Number: IPCOM000038688D
Original Publication Date: 1987-Feb-01
Included in the Prior Art Database: 2005-Jan-31
Document File: 3 page(s) / 65K

Publishing Venue

IBM

Related People

Davidge, RV: AUTHOR [+6]

Abstract

A technique is described whereby a machine enclosure, as used to cover components in a personal computer, is fabricated in such a way as to integrally fit into a front and bottom housing section of the machine, enabling the machine cover to be first lowered into position and then slid to the rear so that various additional surfaces may be engaged before fastening. Overlapping surfaces are provided at all seams between the enclosure components engaging various surfaces, so as to provide complete coverage of electrical and mechanical parts while the machine cover is installed, yet provide for ease of removal when required. The machine enclosure is unique in that the cover may be removed by lifting upward without the need to first slide the cover to the front surface as is done on the IBM PC, XT, and AT machines.

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Machine Enclosure

A technique is described whereby a machine enclosure, as used to cover components in a personal computer, is fabricated in such a way as to integrally fit into a front and bottom housing section of the machine, enabling the machine cover to be first lowered into position and then slid to the rear so that various additional surfaces may be engaged before fastening. Overlapping surfaces are provided at all seams between the enclosure components engaging various surfaces, so as to provide complete coverage of electrical and mechanical parts while the machine cover is installed, yet provide for ease of removal when required. The machine enclosure is unique in that the cover may be removed by lifting upward without the need to first slide the cover to the front surface as is done on the IBM PC, XT, and AT machines. The machine cover 2, as shown in the figure, is fabricated in such a way that flanges 1 are positioned against the rear of front housing 3. Front housing 3 contains locating pin 4 so that holes 5 in flange 1 will mate with the appropriate locating pins 4 during installation of the machine cover. Machine cover 2 is fastened to housing 3 with self- tapping screws 6 through holes 7 in flanges 1 into integral bosses 8 in housing 3. After assembly of various electrical components onto bottom frame 9, machine cover 2 and housing 3, now an integral unit, are lowered onto bottom frame 9 so that the lower flanges 10 of machine cover 2 are between the inside surfaces of frame flanges 11, so that the rear surfaces 12 of machine cover 2 are in front of the corresponding frame rear wall surfaces 13. This enables the lower front housing corner surfaces 14 to be in front of the corresponding front corner surfaces 15. During the installation of machine cover 2, raised frame flange areas 16 pass upward through cover flange slots 17. Machine cover 2 is slid to the rear so that rear surfaces 12 pass under the corresponding lower frame surfaces 18, so that lower housing corner surfaces 14 pass under frame corner surfaces 15. Central tabs 19, which are formed to the rear on mounting bracket 20, pass through slot 21 at the rear of bottom frame 9. Tabs 19 provide stiffness to machine cover 2 after it is assembled to bottom frame 9. During this part of the assembly, front housing 3 is further keyed into position with respect to bottom frame 9 by the passage of frame front flange 22 located between lower front flange 23 and a ser...