Richard F Warren

US Patent:

44785771, Oct 23, 1984

Filed:

Aug 9, 1983

Appl. No.:

6/521721

Inventors:

Richard F. Warren - Granville OH

International Classification:

A61C 700

US Classification:

433 14

Abstract:

An orthodontic appliance for counteracting rotational forces acting on a tooth where such forces originate from the action of an arch wire on the surface mounted conventional orthodontic bracket, said arch wire forces being primarily intended for the linear translation of the tooth. Rotational forces are counteracted by means of a lever arm that is rigidly attached to the conventional orthodontic bracket and in contact with the arch wire at a point spaced apart from the junction of the arch wire and the orthodontic bracket. The counteracting forces generated by the lever arm are proportional only to the rotational forces induced in the tooth by the force from the arch wire. The lever arm may also be configured with a shank capable of being inserted in a rectangular hole located in the conventional orthodontic bracket. Such an appliance is capable of being positively locked into the aforementioned rectangular hole by means of a deformable tail section.

US Patent:

50252429, Jun 18, 1991

Filed:

Jul 24, 1990

Appl. No.:

7/558324

Inventors:

Calvin J. Holtkamp - Mansfield OH
George L. Hetrick - Mansfield OH
Richard Warren - Mansfield OH

Assignee:

Robertshaw Controls Company, Inc. - Richmond VA

International Classification:

H01H 3736
H01H 3712

US Classification:

337309

Abstract:

An oven control for self-cleaning ovens provides a hydraulic sensing system having a wafer-like bellows. The position of the bellows is adjusted by a face cam on a control shaft in the BAKE and BROIL modes of operation. The bellows also controls the temperature of the oven for SELF-CLEANING. However, the face cam does not determine the SELF-CLEANING temperature. A door lock operator switch is also operated by the bellows, but is connected so that the adjusted position of the bellows does not affect the door lock operating temperature. Three separate calibration adjustments are provided. The first calibrates the operating temperature in the BAKE and BROIL modes of operation. The second calibrates the SELF-CLEANING temperature, and the third calibrates the door lock operating temperature. A bimetal ambient temperature compensator is provided to compensate for variations in the ambient temperature of the control.