Frank Edward Walker

US Patent:

43099106, Jan 12, 1982

Filed:

Dec 31, 1979

Appl. No.:

6/108352

Inventors:

Frank A. Walker - Huntington Beach CA

International Classification:

G01L 506

US Classification:

7386246

Abstract:

A simple and inexpensive testing device for checking the tension of the strings of a tennis racquet, a badminton racquet or the like includes a string engaging member for engaging one of the strings of a previously strung racquet. This string engaging member may be bifurcated and be secured to a cylindrical block which is rotatably mounted in the front of a rigid elongated handle. A torsion element is mounted between the block and the rear of the handle, so that when the handle is rotated, and the torsion element is stressed, the handle will rotate relative to the block which is engaging the strings, and the amount of rotation of the handle relative to the block will be an indication of the tension of the strings. In addition, arrangements are provided for indicating that the string engaging member secured to the cylindrical block has been rotated through a predetermined angle. It is convenient to have a disk secured to the cylindrical block, with the disk being notched to indicate rotation through a predetermined angle, when the notch lines up with the strings in the racquet.

US Patent:

45768285, Mar 18, 1986

Filed:

May 17, 1984

Appl. No.:

6/611474

Inventors:

Frank A. Walker - Huntington Beach CA

Assignee:

Geotel, Inc. - Amityville NY

International Classification:

B05D 108

US Classification:

427 34

Abstract:

Plasma spray coating of parts in a low-pressure chamber utilizes a linear induction motor drive system having gapped tracks for supporting and driving part carriers to flow in a continuous series of discrete steps through the low-pressure chamber where the parts are momentarily stopped for preheating and spray coating. Input and output air locks are sealed and unsealed by valve gates that move through the track gaps to optimize the sealing of the locks.

US Patent:

39653994, Jun 22, 1976

Filed:

Mar 22, 1974

Appl. No.:

5/453841

Inventors:

Frank A. Walker - Santa Ana CA
John B. Shevlin - Santa Ana CA

International Classification:

H01G 501

US Classification:

317249R

Abstract:

An electro-mechanical transducer for use in keyboards and the like which incorporates a capacitance change utilization concept. The transducer includes a plunger assembly reciprocably disposed in a housing therefor, in operative disposition over capacitance forming areas on an insulated substrate. The plunger assembly includes a key button disposed on one end of a shaft, an intermediate flange on the shaft and a flange at the other end of the shaft. The intermediate flange is positioned adjacent a frusto-conical elastomeric return spring and also serves as a resilient stop for the shaft. A compressible foam or sponge-like material having a thin, flexible metalized dielectric material on its lower portion, is mounted on the lower surface of the other flange. Actuation of the shaft downwardly toward the substrate causes the dielectric material to bridge the capacitance forming areas related thereto to cause a change in capacitance and transfer of energy therebetween. The metalized dielectric material is highly flexible to allow it to readily conform to irregularities in the capacitance forming area.

US Patent:

47541067, Jun 28, 1988

Filed:

Mar 23, 1987

Appl. No.:

7/028734

Inventors:

Frank Walker - Huntington Beach CA

Assignee:

Symbolic Displays, Inc. - Irvine CA

International Classification:

H01H 506
H01H 1328

US Classification:

200 67A

Abstract:

A compact, double-throw double-pole push-button electric switch is comprised of: a base; four electric terminals fixed to the base; a lower spring retainer pivoted on the base; a push-button key slidingly disposed and captively retain within a housing connected to the base; an upper retainer pivotally disposed within the push-button key and carrying a shorting bar between the opposing pairs of terminals; a coil compression spring captively retained at one end by the lower spring retainer and captively retained at its opposing end by the upper spring retainer; and a pair of double lobe cams connected to the lower spring. As the push-button is depressed, the camming surface within the push-button key comes into sliding contact with one of the two lobes of each of the cams. The cams rotate on the base and bring a fixed lever arm extending from the cam into contact with the shorting bar. The shorting bar is lifted from a contact with the electric terminals and rotated with the upper spring retainer across the gap between the terminals.