Browse Prior Art Database

Spring Loaded Mount for Hall Sensor Emitter Wheel

IP.com Disclosure Number: IPCOM000087485D
Original Publication Date: 1977-Feb-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 2 page(s) / 59K

Publishing Venue

IBM

Related People

Berlier, RA: AUTHOR [+2]

Abstract

The Hall sensor which cooperates with a magnetic emitter wheel, such as shown in the IBM Technical Disclosure Bulletin, Vol. 15, No. 4, September 1972, page 1254, is supported by a spring-loaded mount.

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Spring Loaded Mount for Hall Sensor Emitter Wheel

The Hall sensor which cooperates with a magnetic emitter wheel, such as shown in the IBM Technical Disclosure Bulletin, Vol. 15, No. 4, September 1972, page 1254, is supported by a spring-loaded mount.

In Fig. 1, emitter wheel 10 is shown supported for rotation with shaft 11. Hall sensor 12 is mounted within a slide-type carrier 13. This carrier is resiliently biased toward the wheel by two springs 14. These springs encircle two guide pins 15 the guide pins cooperating with carrier 13 and fixed-position mounting bracket 16.

As shown in the exploded view of Fig. 2, sensor 12 is mounted to a circuit board 17. This board is mounted relative to U-shaped carrier 13 by adjusting screws 18 and leaf spring 19.

Fig. 3 shows the sliding engagement which results between the two legs of carrier 13 and the adjacent surface of wheel 10. Preferably, carrier 13 is formed of a polytetrafluoroethylene filled plastic to minimize friction and wear.

With this configuration, a spacing of .010 inch is accurately maintained between sensor 12 and the adjacent magnetic field of wheel 10, independent of the fact that wheel 10 may not rotate exactly perpendicular to the axis of rotation of shaft 11. After screws 18 are adjusted to achieve the .010 inch spacing, they are sealed to prevent alteration of this spacing.

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