Browse Prior Art Database

Vibration Damper

IP.com Disclosure Number: IPCOM000096245D
Original Publication Date: 1963-Mar-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 49K

Publishing Venue

IBM

Related People

Orlando, AW: AUTHOR

Abstract

The capstan 1 is fastened concentrically to a threaded member 2. This is coupled to shaft 3 fixed centrally to drive drum 4. Capstan 1 is driven in either direction by frictional engagement of either constantly and oppositely rotating roll 5 or 6 with the surface of drum 4. Also capstan 1 is stopped by frictionally engaging a nonrotating (or passive resistively rotating) stop roll 7 with the surface of drum 4.

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Vibration Damper

The capstan 1 is fastened concentrically to a threaded member 2. This is coupled to shaft 3 fixed centrally to drive drum 4. Capstan 1 is driven in either direction by frictional engagement of either constantly and oppositely rotating roll 5 or 6 with the surface of drum 4. Also capstan 1 is stopped by frictionally engaging a nonrotating (or passive resistively rotating) stop roll 7 with the surface of drum 4.

At certain speeds for the surface of capstan 1, undue vibrations are caused to a tape section 12 due to starting and stopping via engagement by rolls 5 or 6 and 7.

A section of tape 12 between capstan 1 and a support 1 1 has particular vibration resonant characteristics. The vibrations induced in the section 12 of tape by start-stop movement of capstan 1 are modified by adding a metallic ring 8 with a rubber ring 9 concentrically between the surface of member 2 and the inner surface of the capstan. Rubber ring 9 is located within groove 10 of metallic ring 8 and dampens vibrations otherwise transmitted to a tape by the capstan. Desirable results also are due to a change in the resonant frequency of the capstan arrangement due to the added inertia of the metallic and rubber rings.

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