Ross G Helft

US Patent:

51664810, Nov 24, 1992

Filed:

Jun 22, 1992

Appl. No.:

7/900799

Inventors:

Ross G. Helft - Indianapolis IN
Daniel K. Amonett - Indianapolis IN
Lawrence A. May - Greenwood IN

Assignee:

Emerson Electric Co. - St. Louis MO

International Classification:

H01H 4310

US Classification:

200 38D

Abstract:

A timing mechanism having electrical switches opening and closing in response to power driven rotating cams. The electrical switches are composed of fixed and movable electrical contact blades which include electrical contacts carried on the blades. For those blades which are switching currents of two amperes or less (120 VAC) a protuberance on one and/or both the fixed and movable blades may form the contact.

US Patent:

48414964, Jun 20, 1989

Filed:

Dec 17, 1987

Appl. No.:

7/134166

Inventors:

George W. Adams - Greenwood IN
Steven W. Smock - Indianapolis IN
Ross G. Helft - Indianapolis IN

Assignee:

Emhart Industries, Inc. - Indianapolis IN

International Classification:

G04F 800
H01H 4310

US Classification:

368107

Abstract:

An appliance timer includes a motor driven cam carried in a housing. A switch blade carried in the housing is responsive to the cam to selectively activate one of a pair of switch circuits, each of which provide a different operating level for an appliance function, e. g. several different heat levels in an automatic dryer. Each switch circuit includes a contact, a contact support spring, and an electrical feed-through which connects to a terminal strap on the exterior of the housing. A resistor that is an integral part of one of the switch circuits provides the level differentiation between the circuits. In one embodiment a carbonaceous organic resistor chip replaces the circuit contact. In another embodiment an inorganic ceramic resistor slug replaces the circuit feed-through.