John R Schaffer

US Patent:

46365940, Jan 13, 1987

Filed:

Sep 24, 1985

Appl. No.:

6/779564

Inventors:

Janak R. Patel - Indian Head Park IL
John S. Schaffer - Tinley Park IL

Assignee:

G & W Electric Company - Blue Island IL

International Classification:

H01H 2154

US Classification:

200 15

Abstract:

An electric power distribution switch including an auxiliary biasing mechanism to assist the operator in closing the switch to overcome the resultant repulsive forces which oppose the closing forces provided by the operator.

US Patent:

52591085, Nov 9, 1993

Filed:

Jul 9, 1992

Appl. No.:

7/911289

Inventors:

John S. Schaffer - Tinley Park IL
Naresh J. Malaviya - Lombard IL

Assignee:

G&W Electric Company - Blue Island IL

International Classification:

H01H 1100

US Classification:

29622

Abstract:

A puffer switch has a cylindrical shell filled with an electrically insulating gas, such as sulphur hexafluoride. A plurality of spaced parallel plates cooperating with the shell for defining a separate compression chamber or volume for each phase of an electrical power circuit that is to be switched. Located in each volume is at least one set of contacts which are subject to arcing as the contacts open or close. A movable contact in each of the sets of contacts has an associated impeller blade which is mounted to rotate with the movable contact and to sweep through the volume for compressing insulating gas in front of the impeller blade. A nozzle associated with the impeller blade directs the compressed insulating gas onto the set of contacts at a point where the arc is possible. The switch is assembled in a low cost manner by supporting spaced parallel plates defining the volumes between them as a slip-in unit which fits into a shell. A thermosetting plastic is used for parts which become hot.

US Patent:

52265285, Jul 13, 1993

Filed:

Nov 6, 1990

Appl. No.:

7/606331

Inventors:

John S. Schaffer - Tinley Park IL
Richard F. Holzhausser - Calumet City IL
Naresh J. Malaviya - Lombard IL

International Classification:

H01H 500

US Classification:

200400

Abstract:

A switch actuator includes an operator plate which provides a structure for mounting the actuator and for supporting the remaining parts. An operator shaft receives torque from an operating handle and via mechanical coupling, transmits torque to a torque plate subassembly. The torque plate compresses a torsion spring which provides temporary energy storage for the switch actuator. The torsion spring acts on a reaction plate subassembly which mechanically couples the torque generated by the spring to a rotor tube to operate the switch contacts. A spring guide subassembly maintains the spring in a predefined region to prevent the spring from deforming into a non-energy storing position during operation. The operator shaft, torque plate, reaction plate, spring guide, and spring are nested substantially concentrically about a predefined mounting axis. Left and right cam followers and a pivot lever combine to form a latch mechanism to prevent the switch actuator from changing position except when operated by a user.

US Patent:

51533995, Oct 6, 1992

Filed:

Nov 6, 1990

Appl. No.:

7/606332

Inventors:

John S. Schaffer - Tinley Park IL
Naresh J. Malaviya - Lombard IL

Assignee:

G&W Electric Company - Blue Island IL

International Classification:

H01H 3370

US Classification:

200148R

Abstract:

A puffer switch has a cylindrical shell filled with an electrically insulating gas, such as sulphur hexafluoride. A plurality of spaced parallel plates cooperating with the shell for defining a separate compression chamber or volume for each phase of an electrical power circuit that is to be switched. Located in each volume is at least one set of contacts which are subject to arcing as the contacts open or close. A movable contact in each of the sets of contacts has an associated impeller blade which is mounted to rotate with the movable contact and to sweep through the volume for compressing insulating gas in front of the impeller blade. A nozzle associated with the impeller blade directs the compressed insulating gas onto the set of contacts at a point where the arc is possible. The switch is assembled in a low cost manner by supporting spaced parallel plates defining the volumes between them as a slip-in unit which fits into a shell. A thermosetting plastic is used for parts which become hot.