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Radial Dampening Cylinder for a Cover of a Typewriter or the Like

IP.com Disclosure Number: IPCOM000039747D
Original Publication Date: 1987-Jul-01
Included in the Prior Art Database: 2005-Feb-01
Document File: 2 page(s) / 39K

Publishing Venue

IBM

Related People

Jennings, JH: AUTHOR

Abstract

A pivotally-mounted top cover of a typewriter is prevented from falling from a raised position by a radial air dampening cylinder. A top cover 1 (Fig. 1), which is pivotally mounted on a fixed center cover 2, has a connecting rod 3 attached thereto by a bracket 4 on the top cover 1 holding a flat end 5 of the connecting rod 3. The connecting rod 3 is secured to a radial cylinder rod 6, which is slidably disposed within a radial cylinder 7. The cylinder 7 is fixed to the center cover 2, which supports the top cover 1 when the top cover 1 is in its lowered or closed position. The rod 6 has an O-ring 8 (Fig. 2) mounted adjacent its end, remote from the connecting rod 3. Accordingly, when the top cover 1 (Fig. 1) is pivoted away from the center cover 2, air escapes through an end opening 9 (Fig. 2) in the cylinder 7.

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Radial Dampening Cylinder for a Cover of a Typewriter or the Like

A pivotally-mounted top cover of a typewriter is prevented from falling from a raised position by a radial air dampening cylinder. A top cover 1 (Fig. 1), which is pivotally mounted on a fixed center cover 2, has a connecting rod 3 attached thereto by a bracket 4 on the top cover 1 holding a flat end 5 of the connecting rod 3. The connecting rod 3 is secured to a radial cylinder rod 6, which is slidably disposed within a radial cylinder 7. The cylinder 7 is fixed to the center cover 2, which supports the top cover 1 when the top cover 1 is in its lowered or closed position. The rod 6 has an O-ring 8 (Fig. 2) mounted adjacent its end, remote from the connecting rod 3. Accordingly, when the top cover 1 (Fig. 1) is pivoted away from the center cover 2, air escapes through an end opening 9 (Fig. 2) in the cylinder 7.

(Image Omitted)

As the top cover 1 (Fig. 1) is moved downwardly from its raised position, the resistance between the O-ring 8 (Fig. 2) and a closed end 10 of the cylinder 7 cushions or dampens closing of the top cover 1 (Fig. 1). This also prevents the top cover 1 from falling because of the resistance created by the air trapped between the O-ring 8 (Fig. 2) and the closed end 10 of the cylinder 7.

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