David A Keyser

US Patent:

40365816, Jul 19, 1977

Filed:

Sep 3, 1976

Appl. No.:

5/720310

Inventors:

David R. Keyser - Churchville PA
Pierce H. Zavod - King of Prussia PA

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

F23Q 100

US Classification:

431267

Abstract:

An igniter for fuel oil sprays. A plurality of fluidic oscillator or resoce tubes are distributed about a central oscillator opening into one end of a closed chamber. One or more nozzles are located in an end of the chamber opposite the tubes. Compressed gas, such as air, is injected at high velocity from the nozzles into the tubes. The kinetic energy of the gas due to alternating in-and-out flow in the tubes is dissipated as heat transferred to the outer surfaces thereof. When fuel spray impinges on the hot outer surfaces of the tubes, ignition results. The central tube is wrapped with a high temperature resistant cloth. Impinging fuel is soaked into the cloth and vaporized as it is heated.

US Patent:

52917843, Mar 8, 1994

Filed:

May 17, 1993

Appl. No.:

8/063844

Inventors:

David R. Keyser - Churchville PA

Assignee:

The United States of America as represented by the Secretary of the Army - Washington DC

International Classification:

G01P 1502

US Classification:

73516LM

Abstract:

A linear acceleration sensing device operates through a fluid medium. A fd signal output represents a differential pressure from the elastic deformation of a fluid-filled diaphragm or bellows assembly. A pair of fluid proximity sensors operate differentially in a fluid control network and detect the elastic deformation of the diaphragm assembly caused by increased hydrostatic pressure resulting from a change in acceleration, or "g" force.