Alan F Grouse, 77707 Grimstead Cir, Cary, NC 27511

8400242, Mar 19, 2013

Nov 30, 2009

12/626997

Elizabeth A. Zelmer - Cary NC, US
David W. Rawls - Cary NC, US
Alan F. Grouse - Cary NC, US

Johnson Electric S.A. - La Chaux-De-Fonds

H01F 7/80

335220, 335282

A solenoid for a park lock mechanism wherein an annular frame has a reduced diameter at one end and receives a bobbin with a coil wound thereon with the bobbin projecting outward of the coil at one end and defining an integral bearing positioned in the one end of the annular frame. A magnetic permeable sintered metal bushing is interposed between the integrated bearing of the bobbin and the one end of the annular frame. A plunger is received in the bobbin for sliding movement relative thereto. The plunger has a first reduced section at one end that includes an element for connecting to a shifter and a second reduce section at its other end that projects out of said bobbin. The solenoid has two operating conditions, a first condition in which no magnetic force is applied to the plunger and a connected shifter is locked, and a second condition in which magnetic force is applied to the plunger and a connected shifter is unlocked for shifting. A manual release is provided for coacting with the plunger for putting the solenoid into the second condition in the absence of power.

4506218, Mar 19, 1985

Jan 12, 1981

6/224126

Fred A. Brown - Woodstock NY
Alan F. Grouse - Woodstock NY

Rotron Incorporated - Woodstock NY

G01R 3102
G08B 2100

324158MG

An arrangement for sensing the operating condition of an alternating current machine employs a Hall switch on the stator which is subjected to the alternating magnetic field established during operation. The Hall switch has a magnetic field strength threshhold below which it will not be actuated. During normal operation of the machine, the alternating field strength will cyclically exceed the switch threshhold, thereby generating a series of pulses at the frequency of alternation of the field. Should the field strength decrease as a result of overload of the machine, a decrease in line voltage, or the like, to a level below the threshhold level of the switch, the pulse output of the switch will cease. Circuitry responsive to the absence of periodic pulses actuates an indicator circuit to warn of the faulty operation.

4618806, Oct 21, 1986

Feb 11, 1985

6/700670

Alan Grouse - Cary NC

Rotron, Inc. - Woodstock NY

H02K 2908

318254

A simplified fan and brushless DC motor has a rotor with an annular permanent magnet that is magnetized in segments about its circumference and is associated with a wave-wound stator coil. Alternate circumferential segments of the magnet are oppositely polarized. Fan blades are located within the annular magnet. The wave-winding varies in position to present alternate magnetic fields opposite in direction to the rotor magnet outer surface to cause rotation thereof. The stator is ironless. The coil can have two bifilar windings alternately energized. A Hall device is, typically, employed for commutation along with suitable switching circuitry.

4553075, Nov 12, 1985

Aug 4, 1983

6/520154

Fred A. Brown - Woodstock NY
Alan F. Grouse - Woodstock NY

Rotron Incorporated - Woodstock NY

H02K 2902

318254

A simplified fan and brushless DC motor employs an annular permanent magnet magnetized in segments about its circumference. Each segment is oppositely radially magnetized with respect to its adjacent segments. Fan blades are located within the annular magnet. A coil comprising two electrically independent and bifilar wound windings, connected to be oppositely energized, and an electromagnet structure defining two pole pieces reside outside the permanent magnet annulus. A Hall effect device alternately energizes the separate coil windings in response to passage of the segments of the rotor magnet to alternately produce opposite magnetic fields in the pole pieces. Thus commutated, the double coil arrangement affects rotation of the rotor and the fan blades.