Ernest W Litch

US Patent:

46879773, Aug 18, 1987

Filed:

Oct 22, 1984

Appl. No.:

6/663654

Inventors:

Subhash M. Brahmavar - Fort Wayne IN
Ernest W. Litch - Fort Wayne IN

Assignee:

General Electric Company - Fort Wayne IN

International Classification:

H02K 2900

US Classification:

318492

Abstract:

Method of operating an electronically commutated motor, controlled by a board mounted electronic circuit, wherein current surges in such circuit are suppressed while dissipating heat associated with such suppression from motor structure as opposed to the control circuit. The heat associated with control circuit current surge suppression is dissipated into the bowels of the motor as opposed to being dissipated from a heat generating resistor mounted on the control circuit board as has been done heretofore. Illustrated structure includes current surge suppressing special winding turns on the motor core. Such special winding turns are connected with a known electronic control circuit so that power supplied to such circuit is transmitted through the special winding on the motor. Current surges associated with operation of the motor control circuit are then suppressed, during operation, by the special winding inside the motor.

US Patent:

RE318205, Jan 29, 1985

Filed:

Dec 10, 1979

Appl. No.:

6/101846

Inventors:

Ernest W. Litch - Fort Wayne IN

Assignee:

General Electric Company - Fort Wayne IN

International Classification:

B23K 1114

US Classification:

219 93

Abstract:

Disclosed subject matter includes flexible motor mounting members particularly adapted for vibration induced flexing movement combined with oscillatory movement about a pivot axis at a point of attachment on a blower housing or other support. Short but strong mounting members are provided that have low torsional mode vibration transmissibilities. Leaf spring mounting arms have low torsional spring constants and yet have sufficient strength to withstand shipping and handling loads for motor. Iadd. blower. Iaddend. assemblies and to permit all angle motor mounting. The mounting member spring constants for axial, radial and tilting vibration modes are selected in specific forms so that the characteristic vibration transmissibility ratios for these modes are each close to unity. However, the characteristic torsional mode vibration transmissibility is substantially less than unity. In particularly preferred embodiments of the invention, sheet steel having a martensitic grain structure is utilized to form the mounting members.

US Patent:

40630609, Dec 13, 1977

Filed:

Dec 1, 1975

Appl. No.:

5/636547

Inventors:

Ernest W. Litch - Fort Wayne IN

Assignee:

General Electric Company - Fort Wayne IN

International Classification:

B23K 1114

US Classification:

219 93

Abstract:

Disclosed subject matter includes flexible motor mounting members particularly adapted for vibration induced flexing movement combined with oscillatory movement about a pivot axis at a point of attachment on a blower housing or other support. Short but strong mounting members are provided that have low torsional mode vibration transmissibilities. Leaf spring mounting arms have low torsional spring constants and yet have sufficient strength to withstand shipping and handling loads for motor assemblies and to permit all angle motor mounting. The mounting member spring constants for axial, radial and tilting vibration modes are selected in specific forms so that the characteristic vibration transmissibility ratios for these modes are each close to unity. However, the characteristic torsional mode vibration transmissibility is substantially less than unity. In particularly preferred embodiments of the invention, sheet steel having a martensitic grain structure is utilized to form the mounting members.