David J English

US Patent:

D2736659, May 1, 1984

Filed:

Jul 12, 1982

Appl. No.:

6/397016

Inventors:

Eugene L. Sly - Portland OR
David C. English - Seattle WA

US Classification:

D10 91

US Patent:

40420493, Aug 16, 1977

Filed:

Sep 29, 1975

Appl. No.:

5/615827

Inventors:

Keith W. Reichow - Renton WA
David C. English - Seattle WA
Jerry L. McCauley - Renton WA

Assignee:

Structural Instrumentation, Inc. - Tukwila WA

International Classification:

G01G 1908
G01G 314
G01B 716

US Classification:

177137

Abstract:

A load measuring system for a tandem-wheeled vehicle. The tandem axles of the vehicle engage opposite ends of two transversely spaced equalizing beams having their midpoints pivotally supporting the vehicle. Deflections of the equalizing beams and front axle, responsive to loading of the vehicle, are sensed by a load cell transducer mounted on each equalizing beam and on the front axle. An amplifying circuit receives the transducer outputs and drives a load indicator. The load indicator provides a visual indication of front and rear wheel axle loading with respect to a preset maximum load point.

US Patent:

52646661, Nov 23, 1993

Filed:

Nov 12, 1992

Appl. No.:

7/975500

Inventors:

David C. English - Seattle WA
David H. Fish - Redmond WA
Ronald A. Wenzel - Kirkland WA

Assignee:

Measurement Systems International - Seattle WA

International Classification:

B66C 140

US Classification:

177147

Abstract:

A cargo hook having fore and aft trunnions mounted in fore and aft bearings supported on frame members of a helicopter or the like, is provided with strain gauges secured in a bore in the aft trunnion for measuring shear strain on the trunnion by a load supported by the cargo hook. Additional strain gauges are secured in the aft trunnion bore for measuring axial and Poisson forces on the trunnion as the axis through the fore and aft trunnions varies from horizontal. The strain gauges are included in an electric circuit of a Wheatstone bridge and an indicator which converts the electric signals from the strain gauges to a readout of units of load weight. The strain gauges which measure axial and Poisson forces are connected in the electric circuit to compensate for the deviation from horizontal of the axis through the fore and aft trunnions, to provide an accurate readout of load weight applied to the cargo hook. A low RF impedence ring is mounted in the trunnion bore to protect against electromagnetic inteference, and a passageway in the trunnion for leading electrical conductors from the strain gauges outwardly of the trunnion, is filled with a sealant for protecting the strain gauges against environmental contaminants such as dust and moisture.

US Patent:

40209113, May 3, 1977

Filed:

Jun 14, 1974

Appl. No.:

5/479474

Inventors:

David C. English - Seattle WA
Jerry L. McCauley - Renton WA
Godfrey A. Holmstrom - Issaquah WA

Assignee:

Structural Instrumentation, Inc. - Tukwila WA

International Classification:

G01G 1908

US Classification:

177136

Abstract:

Several load cell fixed beams transmit the weight of the useful load of a truck or a scale device from the useful load support to the base structure, such as a truck chassis, or a trailer chassis. The load cell fixed beam carries two compression sensitive strain gauges and two tension sensitive strain gauges connected in a Wheatstone bridge circuit to actuate a digital display. An amplifier or a variable gain amplifier can be provided to intensify the bridge circuit signal. Calibration controls can be provided for setting the readout of the useful load to zero, and further controls can alter the sensitivity of the circuitry to alter the ratio between useful weight and readout.

US Patent:

39498220, Apr 13, 1976

Filed:

Sep 30, 1974

Appl. No.:

5/510698

Inventors:

David C. English - Seattle WA
Godfrey A. Holmstrom - Issaquah WA

International Classification:

G01G 2100
G01G 314

US Classification:

177126

Abstract:

A weight sensing pad includes two spaced apart load cells, each including a fixed end bending beam deflectable by vertical loads applied to the pad by the wheel of a vehicle and electrical strain gages for sensing beam deflection. The pad includes electronic control circuitry connecting the strain gages in a wheatstone bridge circuit, and providing calibration, zero, output, and bridge sensitivity adjustments. Two or more pads can be serially interconnected electrically with a remote electronic weight indicator.

US Patent:

43006450, Nov 17, 1981

Filed:

Oct 9, 1979

Appl. No.:

6/082620

Inventors:

Eugene L. Sly - Portland OR
David C. English - Seattle WA

International Classification:

G01G 308

US Classification:

177211

Abstract:

An elongated bending beam and an elongated flexure strap are supported in substantially parallel, spaced-apart relationship by end cantilever blocks one of which is secured to a scale base and the other of which mounts a food receiving platform for movement vertically with respect to the scale base. First and second pairs of matched strain sensing resistors are bonded to the opposite faces of the bending beam adjacent the opposite ends thereof and are connected electrically to form a balanced Wheatstone bridge, the output voltage of which is utilized to operate a digital read-out unit for indicating the weight of a small portion of sliced food deposited upon the scale platform from a food slicer, and is also utilized to turn off the food slicer when the desired weight of food is deposited on the scale platform.

US Patent:

46765492, Jun 30, 1987

Filed:

Mar 28, 1986

Appl. No.:

6/845544

Inventors:

David R. English - Sumner WA

Assignee:

Fashion Magic, Inc. - Kent WA

International Classification:

A47C 3100

US Classification:

297224

Abstract:

A cover for use in covering a seat, such as an automobile bucket seat, is provided which includes a nonstretchable portion that covers the forward surfaces of the seat bottom and back, and a stretchable skirt and cap that permits the cover to be adapted to fit a variety of sizes of bucket seats including both those of the high-back and low-back variety. The cover includes the cap, which covers at least a portion of the high-back bucket seat. The cap is stretchable widthwise to accommodate the wider width of a low-back seat and the cap, as it stretches widthwise, simultaneouly decreases in vertical dimension thereby decreasing the overall length of the seat cover so that it more closely fits a low-back bucket seat. In the preferred embodiment, the nonstretchable portion of the seat cover is a sheepskin, while the stretchable portions are made of a wool cloth having a nap similar to the nap of the sheepskin.

US Patent:

41020316, Jul 25, 1978

Filed:

Dec 10, 1976

Appl. No.:

5/749348

Inventors:

Keith W. Reichow - Renton WA
David C. English - Seattle WA
Jerry L. McCauley - Renton WA

Assignee:

Structural Instrumentation, Inc. - Tukwila WA

International Classification:

B23Q 300

US Classification:

29464

Abstract:

A load measuring system for a tandem-wheeled vehicle. The tandem axles of the vehicle engage opposite ends of two transversely spaced equalizing beams having their midpoints pivotally supporting the vehicle. Deflections of the equalizing beams and front axle, responsive to loading of the vehicle, are sensed by a load cell transducer mounted on each equalizing beam and on the front axle. An amplifying circuit receives the transducer outputs and drives a load indicator. The load indicator provides a visual indication of front and rear wheel axle loading with respect to a preset maximum load point.