Browse Prior Art Database

Height Leadscrew

IP.com Disclosure Number: IPCOM000039760D
Original Publication Date: 1987-Aug-01
Included in the Prior Art Database: 2005-Feb-01
Document File: 2 page(s) / 44K

Publishing Venue

IBM

Related People

Rachui, RA: AUTHOR

Abstract

A single height adjustment device through which tilt on a cathode ray tube (CRT) is achieved is described and illustrated in the figure. A leadscrew 1 is rigidly attached to the underside of the structure 2 to be raised. The leadscrew passes through a spacer 3 and into a guidance cavity below. A spring 4 which surrounds the leadscrew 1 provides constant pressure on the spacer. The spring and spacer are housed so the spacer is spring loaded. Star-shaped item 5, which surrounds the leadscrew 1, is free to pivot about the leadscrew by way of the leadscrew's spiral construction. The weight provided by the structure 2 pressurizes the star 5 into the spacer 3. The spring 4 force against the spacer is greater than the structure weight whereby the spacer does not rotate.

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 100% of the total text.

Page 1 of 2

Height Leadscrew

A single height adjustment device through which tilt on a cathode ray tube (CRT) is achieved is described and illustrated in the figure. A leadscrew 1 is rigidly attached to the underside of the structure 2 to be raised. The leadscrew passes through a spacer 3 and into a guidance cavity below. A spring 4 which surrounds the leadscrew 1 provides constant pressure on the spacer. The spring and spacer are housed so the spacer is spring loaded. Star-shaped item 5, which surrounds the leadscrew 1, is free to pivot about the leadscrew by way of the leadscrew's spiral construction. The weight provided by the structure 2 pressurizes the star 5 into the spacer 3. The spring 4 force against the spacer is greater than the structure weight whereby the spacer does not rotate. As the structure 2 is raised, the star 5 rotates about the leadscrew 1 and over the spacer
3. As the weight of the structure is reapplied, the star bites into the spacer holding the structure weight and overcomes the spring and frictional forces on the spacer. The spacer is rotated by the star about the leadscrews as the structure is loaded. When additional force is released, the spring compresses the spacer against the housing. Now the structure can again be raised to its limit in varying degrees.

1

Page 2 of 2

2

[This page contains 2 pictures or other non-text objects]