Armature insert

Details Armature insert Armature insert

1990-02-15

1991-03-26

Zimmerman, John J.

Stock material or miscellaneous articles

All metal or with adjacent metals

Intermediate article

428586, 4285428, 335261, H01F 300, H01F 708

Patent

active

050028359

ABSTRACT:
A metal insert is provided for use in forming an elastomer-tipped armature to a precise length. The insert is formed as an elongated member with a central hole passing through its length, and an elastomer element is molded within the hole. A circumferential groove is formed in the exterior surface of the insert to create a weakened "hinge" point in the insert wall such that, as mold elements for forming the elastomer element engage opposing ends of the insert, the insert may be compressed longitudinally at the groove to thereby decrease the overall length of the completed armature to within a predetermined tolerance.

REFERENCES:
patent: 653912 (1900-07-01), Heggie
patent: 2126893 (1938-08-01), Klamp
patent: 2988675 (1961-06-01), Bancroft
patent: 3013768 (1961-12-01), Mastra
patent: 3082359 (1963-03-01), Magiafico et al.
patent: 3510814 (1970-05-01), Nordfors
patent: 3561246 (1971-02-01), Verdickt

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