Title: Apparatus for adjusting biasing force of leaf spring

Abstract: An apparatus for adjusting biasing forces of leaf springs, for example, those incorporated in an armature of an electromagnet relays. The apparatus is adapted to measure the biasing forces of the leaf springs, to compare the measured values with a reference value, to determine the direction and the extent of the required adjustment and to impart a plastic deformation in the determined direction and by the determined extent thereby to correct or adjust the biasing force to make the later fall within a predetermined range.

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Inventors: Kubota, Hitoshi (Yokohama, JA)
Nishi, Takayuki (Yokohama, JA)
Kobayashi, Takashi (Fujisawa, JA)

Application Number: 715157
Filing Date: 1976-08-17
Publication_date: 1977-07-19
Assignee: Hitachi, Ltd. (JA)
Primary Class(es): 72/17.2 29/407.08, 72/454
Other Classes:
US Patent Ref:

283535	Aug, 1883	Tittle	72/454.
3459018	Aug, 1969	Miller	72/702.
3949588	Apr, 1976	Seo	72/389.

Other Refs:
Primary Examiner: Lanham, C.W.
Assistant Examiner: Crosby, Gene P.
Attorney: Craig & Antonelli