Machine element or mechanism – Gearing – Plural prime movers selectively coupled to common output
Patent
1994-11-16
1996-07-09
Lorence, Richard M.
Machine element or mechanism
Gearing
Plural prime movers selectively coupled to common output
192 18B, 192 90, 188171, F16H 3706, F16D 6706
Patent
active
055334253
ABSTRACT:
The present invention is an electrically actuated disc stack for drives, brakes and combinations thereof having minimized residual magnetism. Residual magnetism is minimized by the following features being provided, singly or in combination, in a drive, brake or combination thereof. 1) A non-magnetic material is located between the clutch armature plate and the clutch electromagnetic coil assembly, and a non-magnetic material is located between the brake armature plate and the brake electromagnetic coil assembly. The non-magnetic material serves as a spacer to add reluctance to the magnetic circuit and may be for example a wafer for instance composed of aluminum or stainless steel or may be a coating. 2) A driver circuit for energizing the primary and secondary electromagnetic coils, wherein the self-induced EMF produced when current is shut-off is rapidly dissipated. 3) Non-magnetic drive components are used in the path of the magnetic circuit of the clutch and brake electromagnetic coil assemblies. For example, the portion of the drive shaft concentric with respect to the clutch electromagnetic coil assembly is composed of a non-magnetic metal, such as aluminum. This has the effect to reduce residual magnetism in that the drive shaft will not be contributing its own permanent magnetism acquitted during energization of the primary electromagnetic coil.
REFERENCES:
patent: 987954 (1911-03-01), Brush
patent: 2464129 (1949-03-01), Goettisheim
patent: 2547137 (1951-04-01), Ochtman
patent: 2658593 (1953-11-01), Doebeli
patent: 2728878 (1955-12-01), Sperr, Jr.
patent: 2840205 (1958-06-01), Linke
patent: 2958406 (1960-11-01), Pierce
patent: 3016118 (1962-01-01), Zatsky
patent: 3251441 (1966-05-01), Winter
patent: 3270265 (1966-08-01), McNulty
patent: 3324982 (1967-06-01), Mason et al.
patent: 3329247 (1967-07-01), Jaeschke
patent: 3412834 (1968-11-01), Root
patent: 4079820 (1978-03-01), Matli
patent: 4125178 (1978-11-01), Monks
patent: 4181201 (1980-01-01), McCarthy
patent: 4279330 (1981-07-01), Pottorff et al.
patent: 4352415 (1982-10-01), Powell
patent: 4458794 (1984-07-01), Yater
patent: 4463841 (1984-08-01), Kelley
patent: 4577738 (1986-03-01), Yater
patent: 4607730 (1986-08-01), Paisley
patent: 4607736 (1986-08-01), Kelley
patent: 4667784 (1987-05-01), Cronin
patent: 4676356 (1987-06-01), Beccaris et al.
patent: 4739865 (1988-04-01), Yater et al.
patent: 4765448 (1988-08-01), Sommer
patent: 4821847 (1989-04-01), Langdon et al.
patent: 4921078 (1990-05-01), Sommer
patent: 4938321 (1990-07-01), Kelley et al.
patent: 5172798 (1992-12-01), Mabee
patent: 5186284 (1993-02-01), Lamela et al.
patent: 5242039 (1993-09-01), Mabee
patent: 5389049 (1995-02-01), Mabee
Service Manual of Two-Speed Drive II Of Force Control Ind. Inc. pp. 1-4, dated Apr. 1991.
Warner "Clutches, Brakes and Controls Master Catalog", dated before Jan. 1, 1992, of Warner Electric Division of Dana Corp.
Oil Shear Electric Brake Brochure of Force Control Ind, Inc, p. 3 dated before Jan. 1, 1992.
Spiral Retaining Rings Catalog of Smalley Steel Ring Co. pp. 34-35 dated before Jan. 1, 1992.
Easom Engineering and Manufacturing Corporation
Keefe Peter D.
Lorence Richard M.
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