Metal working – Method of mechanical manufacture – Electrical device making
Patent
1986-05-06
1988-02-16
Hall, Carl E.
Metal working
Method of mechanical manufacture
Electrical device making
29522R, 29 73G, 29761, 29596, H01F 4102
Patent
active
047246049
ABSTRACT:
A method for fitting a ring coil in a channel formed in the inner circumference surface of a hollow cylindrical member comprises a step of deforming the ring coil by applying a force to one or more portions thereof radially outwardly. The deformation of the ring coil causes a reduction of the circumscribed circle diameter facilitating its insertion into the member. After the insertion, the deformed portions are respectively outwardly pressed so that the non-deformed portions are respectively engaged with the channel. Subsequently, the deformed coil is sequentially pressed to the bottom surface of the channel are around so that the deformed coil is returned to its original shape and the whole of the coil is perfectly fitted in the channel.
REFERENCES:
patent: 3835339 (1974-09-01), Laronze
patent: 4114258 (1978-09-01), Beech
patent: 4578604 (1986-03-01), Eilertson
Patents Abstracts of Japan, vol. 5, No. 179 (E-82) [851], 17th Nov. 1981; & JP-A-56 107 549 (Matsushita Denki Sangyo K.K.), 26-08-1981.
Hamane Tokuhito
Kawazoe Hiroshi
Sugiura Kiyotaka
Hall Carl E.
Matsushita Electric - Industrial Co., Ltd.
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