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Noise Reducing Structure

IP.com Disclosure Number: IPCOM000092791D
Original Publication Date: 1967-Feb-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 37K

Publishing Venue

IBM

Related People

Milburn, LH: AUTHOR

Abstract

Acoustical noise is reduced to a level eliminating the use of sound-proofed covers by interposing polyurethane stops 10 and 12 at strategic locations in the mechanism to be quieted.

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Noise Reducing Structure

Acoustical noise is reduced to a level eliminating the use of sound-proofed covers by interposing polyurethane stops 10 and 12 at strategic locations in the mechanism to be quieted.

An example of a mechanism is escapement 14 for a paper tape reader. Armature 16 is pivoted in fulcrum bracket 18 and is moved by magnet 20. Armature 16, or an antiresidual magnetic shim 22 which is alternately borne by the armature 16, normally strikes the core or centerpost 24 of magnet 20. The end of armature 16 also normally strikes the undersurface of escapement limit bracket 26 arranged on frame 30 of magnet 20.

The stops 10 and 12 absorb the shock, reducing the acoustical noise made by armature 16 striking core 24 and bracket 26 and at the same time provides the effect of an antiresidual shim.

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