Browse Prior Art Database

Leadscrew Dampener

IP.com Disclosure Number: IPCOM000051408D
Original Publication Date: 1981-Jan-01
Included in the Prior Art Database: 2005-Feb-10
Document File: 2 page(s) / 49K

Publishing Venue

IBM

Related People

Llewellyn, BC: AUTHOR [+3]

Abstract

A leadscrew dampener is employed within a typewriter to reduce vibratio noise occasioned by leadscrew oscillations. The leadscrew is utilized to drive a carrier for print imprinting mechanisms from left to right across the width of the typewriter. Certain machines are built with a long writing line and corresponding long leadscrew, making them more prone to leadscrew oscillation.

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Leadscrew Dampener

A leadscrew dampener is employed within a typewriter to reduce vibratio noise occasioned by leadscrew oscillations. The leadscrew is utilized to drive a carrier for print imprinting mechanisms from left to right across the width of the typewriter. Certain machines are built with a long writing line and corresponding long leadscrew, making them more prone to leadscrew oscillation.

The leadscrew dampener 11 supports and dampens the leadscrew 13 at a point midway between the left and right frame members of the typewriter which also provide support to the leadscrew 13. The lead screw dampener 11 is pivoted about axis 15 to swing out of the way as the print carrier (not shown) advances along the leadscrew. The plastic block 17 supports the leadscrew 13 on three sides with minimal clearance. The bracket 19 pivotally supports block
17. A light torsion spring 21 retains the block 17 squarely on leadscrew 13 while allowing the leadscrew nut and lock nut on the print carrier to rotate the block aside when passing. Since leadscrew 13 requires dampening only in one plane (XY) the spring 21 is chosen to minimize drag to the carrier. The bracket 19 may be adjusted in both directions in the XY plane along the slotted guide 23 and along a slotted guide (not shown) in the rear surface thereof.

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