Browse Prior Art Database

Safety Interlock Switch

IP.com Disclosure Number: IPCOM000038348D
Original Publication Date: 1987-Jan-01
Included in the Prior Art Database: 2005-Jan-31
Document File: 2 page(s) / 55K

Publishing Venue

IBM

Related People

Broom, WE: AUTHOR [+3]

Abstract

This article describes a tamper-proof, power-interrupting safety interlock switch, which could be used, for example, on the door of a disk drive mechanism. The illustrated embodiment consists of a bezel 10, a printed circuit card 12, a door 14, and a contact bar 16. The card 12 is fastened to the bezel 10, and the contact bar 16 is mounted on the door 14 which rotates about a pivot point 18. When the door 14 is in its closed position as shown in Fig. 1, the contact bar 16 couples two printed circuit lands on the card 12, completing the power path and allowing the drive to operate normally. (Image Omitted) When the door 14 is opened as shown in Fig. 2, e.g., during a disk change operation, the contact bar 16 is lifted off the card 12 by a stop 20, an integral part of the door 14.

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Safety Interlock Switch

This article describes a tamper-proof, power-interrupting safety interlock switch, which could be used, for example, on the door of a disk drive mechanism. The illustrated embodiment consists of a bezel 10, a printed circuit card 12, a door 14, and a contact bar 16. The card 12 is fastened to the bezel 10, and the contact bar 16 is mounted on the door 14 which rotates about a pivot point 18. When the door 14 is in its closed position as shown in Fig. 1, the contact bar 16 couples two printed circuit lands on the card 12, completing the power path and allowing the drive to operate normally.

(Image Omitted)

When the door 14 is opened as shown in Fig. 2, e.g., during a disk change operation, the contact bar 16 is lifted off the card 12 by a stop 20, an integral part of the door 14. Power is interrupted, and the drive will not operate until the door 14 is again closed. Access to the interlock switch is prevented by a blade 22 to provide operator safety and to eliminate tampering.

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