Kenneth M Albrecht

US Patent:

6738250, May 18, 2004

Filed:

Jul 3, 2002

Appl. No.:

10/190132

Inventors:

Peter D. Joseph - Twin Lakes WI
Kenneth A. Albrecht - Zion IL

Assignee:

The Cherry Corporation - Waukegan IL

International Classification:

H01H 4700

US Classification:

361144, 361160, 361166, 361183

Abstract:

A solenoid-actuated latchable relay is controlled by a microprocessor that turns on at least one triac to selectively energize a solenoid coil with a desired polarity energization signal. The triac is only operated momentarily so that a single energization pulse is applied to the coil to move an associated magnetic plunger to a position corresponding to the polarity of the pulse. The magnetic plunger is latched in this position until another pulse is applied to change the position.

US Patent:

6904805, Jun 14, 2005

Filed:

Jun 3, 2003

Appl. No.:

10/453267

Inventors:

Peter D. Joseph - Twin Lakes WI, US
Erik W. Linske - Greendale WI, US
Kenneth A. Albrecht - Zion IL, US

Assignee:

Cherry Corporation - Pleasant Prairie WI

International Classification:

G01P015/08

US Classification:

7351438, 7351426, 7351431, 7351432

Abstract:

An accelerometer is limited to a very small displacement range, and within that range, is useful for detecting motion and change of rate of motion by optical, magnetic, or electrical means. A unique spring suspends a planar mass that is very sensitive to motion of an object in which the accelerometer is held. In one embodiment, an optical detector detects the motion of the mass by the intensity of reflected radiation. In another embodiment, a Hall-effect sensor detects the motion of the mass by a current generated by the motion of the mass in an electric field. The accelerometer may be used in a variety of automotive, appliance, and industrial applications.