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Spring Keylever Pawl

IP.com Disclosure Number: IPCOM000053123D
Original Publication Date: 1981-Sep-01
Included in the Prior Art Database: 2005-Feb-12
Document File: 2 page(s) / 47K

Publishing Venue

IBM

Related People

Vitek, EJ: AUTHOR

Abstract

The coil spring 10 (Fig. 1) in compression acts as a rigid column when force is applied axially. When a force is applied perpendicular to the spring axis, the spring deflects easily as a cantilever-type spring. Thus, when a keylever 14 is depressed, the spring 10 is compressed and the force is transferred through the spring 10 to the interposer 16. The spring 10 is deflected to the side (Fig. 2) when the keylever 14 is held down during a machine cycle as the character interposer 12 returns to its restored position.

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Spring Keylever Pawl

The coil spring 10 (Fig. 1) in compression acts as a rigid column when force is applied axially. When a force is applied perpendicular to the spring axis, the spring deflects easily as a cantilever-type spring. Thus, when a keylever 14 is depressed, the spring 10 is compressed and the force is transferred through the spring 10 to the interposer 16. The spring 10 is deflected to the side (Fig. 2) when the keylever 14 is held down during a machine cycle as the character interposer 12 returns to its restored position.

Other possible coil geometry design possibilities besides the common circular type would be an oval design which allows considerable misalignment between the spring 10 and the interposer 16. Another variable in controlling spring deflection when held down is the contacting edge of the interposer 16. Its edge may be angled 22 (Fig. 4) to twist or push the spring to the side of the interposer or center it and retain it centered by a notch 24 (Fig. 3).

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