Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – To produce composite – plural part or multilayered article
Patent
1977-04-28
1978-09-05
Lowe, James B.
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
To produce composite, plural part or multilayered article
29596, 264130, 264262, 264264, 264272, B29D 300, H02K 1502
Patent
active
041120418
ABSTRACT:
According to the invention, electrically conductive paths are formed between the coil armor and the core laminations of dynamoelectric machines for inhibiting corona. This is achieved by injecting an uncured, semi-conducting, elastomeric material between the coil sides and the walls of the core slots by way of the air ducts in the core, and thereafter curing the material. The uncured material has a viscosity which enables it to be forced under pressure between the coil sides and slot walls by means of a pneumatically actuated gun assembly whose construction and operation are described in detail. The cured material has a resistance high enough not to form eddy current paths between laminations and yet low enough to conduct charge from the coil armor to the core. It is also capable of retaining its strength, elasticity, conductivity, etc., and remaining in place between the coils and core under vibrations, coolant flow, electric stresses, repeated temperature changes, etc., for the normal operating life of the machine.
REFERENCES:
patent: 3194993 (1965-07-01), Hackney et al.
patent: 3233311 (1966-02-01), Giegerich et al.
patent: 3377602 (1968-04-01), Kruse
patent: 3710437 (1973-01-01), Kipple et al.
patent: 3824683 (1974-07-01), Rhudy
patent: 3991152 (1976-11-01), Santi et al.
Lonseth Palmer
Moorby Donald G.
Panter Hubert Gerald
Ahern John F.
Canadian General Electric Company
Lowe James B.
Mitchell James W.
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