Anthony F Fraioli

US Patent:

40015866, Jan 4, 1977

Filed:

May 9, 1975

Appl. No.:

5/576011

Inventors:

Anthony V. Fraioli - Setauket NY

Assignee:

Plessey Incorporated - Melville NY

International Classification:

G01J 100

US Classification:

250345

Abstract:

A thermistor material is deposited and fired on a substrate, and an interdigitated pair of electrodes is deposited and fired thereover. The device is removed from the substrate and a third electrode of low thermal mass is applied on the side opposite the electrode pair. The three electrodes may be connected in a bridge circuit to form a novel, AC-generating infrared detector. When encapsulated in a header-type enclosure including a slit parallel to the electrode pair the sensor functions as an intrusion detector for moving objects. The thermistor material is preferably cobalt oxide.

US Patent:

39664635, Jun 29, 1976

Filed:

Apr 7, 1975

Appl. No.:

5/565835

Inventors:

Anthony V. Fraioli - East Setauket NY
John A. DeRosa - Queens Village NY

Assignee:

Plessey Incorporated - New York NY

International Classification:

C22B 1104

US Classification:

75108

Abstract:

A high density precious metal powder that resists sintering at 600. degree. C. and contains a very small percentage of titania or zirconia is produced by co-nucleation and precipitation of gold and titania from an ammoniacal solution at pH 3-4 with a bisulfite. A nickel powder including a very small percentage of a refractory oxide such as zirconia is prepared by co-nucleation and precipitation from an alkaline solution with hydrazine. Materials so prepared have oxidation resistance and sintering temperatures superior to the pure metal, and find utility in microelectronics as air-fired thick films. Nickel powders so prepared are also useful as hydrogenation catalysts and in other applications.