Kenneth Warren Christensen

US Patent:

39671682, Jun 29, 1976

Filed:

Jun 26, 1975

Appl. No.:

5/590641

Inventors:

Kenneth Christensen - Alexandria VA

Assignee:

Illinois Tool Works Inc. - Chicago IL

International Classification:

H01G 113
H01G 420

US Classification:

317258

Abstract:

An electrical capacitor is formed by winding alternating layers of single-sided metallized nonheat-shrinkable dielectric material and of a heat-shrinkable dielectric material together. Radial leads are secured to the ends of the capacitor after it is wound by heating the leads and forcing them into the ends of the dielectric materials. The heat-shrinkable layers effectively seal off the electrodes from each other. In addition, the heat-shrinkable dielectric layers may provide higher current capacities, improved dissipation factor, better control over the temperature vs. capacitance characteristic of the capacitor, improved corona threshold voltage and improved control over the final value of the wound capacitor.

US Patent:

56450796, Jul 8, 1997

Filed:

Dec 2, 1994

Appl. No.:

8/348321

Inventors:

Hormoz Zahiri - Los Angeles CA
Christopher A. Zahiri - Los Angeles CA
Norman C. Christensen - Whittier CA
Kenneth N. Christensen - Whittier CA

International Classification:

A61F 537

US Classification:

128846

Abstract:

The present invention is a novel and unique orthopedic apparatus for holding, maneuvering and maintaining a body part of a patient during orthopedic surgery. The orthopedic apparatus provides for assisting the primary surgeon during orthopedic surgery by holding, maneuvering and maintaining a patient's leg, thereby eliminating any assistant surgeon in the surgery operation. The orthopedic apparatus is capable of independently accomplishing transverse sliding, up-and-down tilting, lateral swinging, longitudinal extension/retraction, and axial rotation so that the surgeon can properly positioned a patient's leg for the orthopedic operation. The orthopedic apparatus has self-locking gear mechanisms to hold the various sections of the orthopedic apparatus in position to thereby hold the patient's leg in the proper position throughout the surgical operation. The orthopedic apparatus can be mechanically, electrically or hydraulically driven to adjust the orthopedic apparatus, so that the surgeon can position the patient's leg with great accuracy during surgery.