Browse Prior Art Database

DASD Frame Assembly - Center Device

IP.com Disclosure Number: IPCOM000036534D
Original Publication Date: 1989-Oct-01
Included in the Prior Art Database: 2005-Jan-29
Document File: 4 page(s) / 121K

Publishing Venue

IBM

Related People

Davis, MF: AUTHOR [+4]

Abstract

The article describes a device that is used to hold a machine cover in place on a direct access storage device (DASD) frame assembly. (Image Omitted)

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 56% of the total text.

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DASD Frame Assembly - Center Device

The article describes a device that is used to hold a machine cover in place on a direct access storage device (DASD) frame assembly.

(Image Omitted)

The locations of clearance holes in a machine cover can be expected to vary significantly from the mating locations of the threaded holes in the DASD frame assembly. This is due to the accumulation of tolerances in the mechanical dimensions of the parts involved. However, it is particularly important that the attachement screws be properly aligned with the holes in the cover because of the desired effect on the external appearance of the machine.

All of the drawings show the unit placed on its right side, in a position in which it is assembled and serviced.

Fig. 1 is a partially exploded view of the DASD frame assembly with the machine cover being fastened thereto, as the structures are viewed from above, to the front, and to the right.

Fig. 2 is a partial cross-sectional front view of the DASD frame assembly, showing the floating receptacle which is provided for the cover attachment screws.

Fig. 3 is a partial cross-sectional front view showing one of the attachment screws fastened through the machine cover into the floating receptacle.

(Image Omitted)

Fig. 4 is a partial cross-sectional view showing the features of the clearance hole provided in the cover for the attachment screw.

Fig. 5 is a cross-sectional side view of a centering washer which can be considered an optional embodiment of the device described.

Fig. 6 is a top view of the centering washer.

Referring to Fig. 1, the DASD frame assembly 1 is rigidly attached to the machine framework (not shown) before the installation of the machine cover 2. Also, before the installation of cover 2, a pair of cover attachment screws 3 are attached to this cover, operating through

(Image Omitted)

mounting holes 4, to be held loosely in place by retainers 5. As the cover is installed on the machine, attachment screws 3 are driven into floating receptacles 6 in the DASD frame assembly 1, thereby fastening the cover to this frame assembly. Thus, the flexibility of this relatively large cover is restricted, and enough strength is achieved to allow the entire machine to be picked up and

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lowered into packaging using vacuum devices operating on the outside surface of the cover.

With reference to Fig. 2, receptacles 6 are mounted in the DASD frame assembly 1 in a floating manner using rivets 7 operating in oversize holes to correct for misalignment between the mounting holes 4 in cover 2 and the location of the threaded...