David G Peck

US Patent:

41004906, Jul 11, 1978

Filed:

Mar 11, 1977

Appl. No.:

5/776517

Inventors:

David B. Peck - Williamstown MA
Vincent T. Guntlow - Williamstown MA
Paul H. Netherwood - Williamstown MA

Assignee:

Diametrics, Inc. - Williamstown MA

International Classification:

G04F 800

US Classification:

324182

Abstract:

An elapsed time indicator includes an electrolytic timing cell in series connection with a resistor, which series circuit may be connected to a D. C. voltage. The cell is comprised of an aluminum can containing a liquid electrolyte with an aluminum anode immersed therein. During operation an aluminum oxide film is grown on the surfaces of the anode, the film thickness and resistance increasing with time. The voltage dropped across the cell of any instant is employed as an indication of the accumulated elapsed time during which the D. C. voltage has been connected to the circuit.

US Patent:

39769224, Aug 24, 1976

Filed:

Jun 27, 1975

Appl. No.:

5/591197

Inventors:

David B. Peck - Williamstown MA
Edward C. Geissler - Williamstown MA

Assignee:

Sprague Electric Company - North Adams MA

International Classification:

H01G 900

US Classification:

317231

Abstract:

Each of at least four electrolytic capacitor packages contains a convolutely wound valve-metal foil capacitor section having package leads connected to tabs that contact the foils in a central region thereof. The package leads extend from one face of each package, and are threaded through holes in a double-sided printed wiring board that serves as a stripline. The anode leads are connected to one metal face of the stripline and the cathode leads to the other, the metal on each face of the stripline covering a major portion of the insulating board. This combination of simple centrally connected foil-type capacitors being connected by means of very short leads to a stripline provides a low impedance multiple capacitor assembly having good high frequency performance and low cost.

US Patent:

41052943, Aug 8, 1978

Filed:

Aug 4, 1976

Appl. No.:

5/711612

Inventors:

David B. Peck - Williamstown MA

Assignee:

Dielectric Systems International, Inc. - Williamstown MA

International Classification:

G02F 116

US Classification:

350269

Abstract:

In an electrostatic device for the gating of electromagnetic radiation in response to an electrical signal, including a rod shaped fixed electrode and a resilient variable electrode sheet with a film of insulation interposed therebetween. The variable electrode sheet is pressed into a groove in a base plate. The fixed electrode is mounted in the groove over the variable electrode. The assembly of this simple device requires a minimum of noncritical steps.