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Armature Design for Clapper Type Solenoid

IP.com Disclosure Number: IPCOM000082835D
Original Publication Date: 1975-Feb-01
Included in the Prior Art Database: 2005-Feb-28
Document File: 2 page(s) / 26K

Publishing Venue

IBM

Related People

Gibson, DK: AUTHOR [+2]

Abstract

A metal stud of electrical iron is located on the armature of a clapper-type solenoid to maximize the magnetic coil force. The stud is placed to minimize the amount of inertia of the moving armature to thereby maximize its pick time.

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Armature Design for Clapper Type Solenoid

A metal stud of electrical iron is located on the armature of a clapper-type solenoid to maximize the magnetic coil force. The stud is placed to minimize the amount of inertia of the moving armature to thereby maximize its pick time.

Clapper-type solenoid 11 includes a coil 13, yoke 15, and spring biased armature 17. In order to increase the closure force, it is conventional to apply more ampere turns to coil 13. Increased force, however can be achieved by placing a metal stud 19 of electrical iron onto the armature by a hot-upset method. The stud is placed above core stud 21 extending past pivot 23 and is centered on armature 17.

By placing stud 19 close to the pivot, inertia of the armature 17 is reduced thereby minimizing the pick time. By placing stud 19 adjacent the pivot portion 23 of yoke 15, the higher magnetic field existing thereat is directed through the stud 19 to the stud 21 to form a closed magnetic path, thereby minimizing the force fields which heretofore went through the air above the armature 17 at the location of stud 19.

Experiments show that by thusly placing stud 19, the force generated can be approximately doubled over that existing for the same solenoid having no stud.

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