John W Foley

44292112, Jan 31, 1984

Aug 2, 1982

6/403985

Jeffrey P. Carstens - South Glastonbury CT
Paul R. Blaszuk - Lebanon CT
John S. Foley - Manchester CT

United Technologies Corporation - Hartford CT

B23K 2700

219121LC

A laser pipe welding system for welding 360. degree. around a pipe includes a pair of focusing heads each welding half the pipe circumference, a seam tracker to keep the focal spot on the seam to compensate for axial and radial variations, an active beam alignment system for real-time compensation of angular misalignment, and both passive and active-feedback beam transport systems that flexibly follow the focus head.

51739186, Dec 22, 1992

Oct 23, 1991

7/780897

Sallie S. Townsend - Manchester CT
Philip R. Cunningham - Bolton CT
John S. Foley - Manchester CT

United Technologies Corporation - Hartford CT

H01S 308

372 95

A laser with an unstable resonator configuration is described with a second, lower power auxiliary laser to provide a feedback beam to pulse high power CW lasers without exceeding the power handling capability limitation of currently available modulators. The present laser relies on adjoint mode feedback provided by the auxiliary laser to accomplish pulsed operation with a modulator in the low power feedback beam path. Higher power output beams can be generated with multiple stages of auxiliary laser providing adjoint mode feedback, thereby reducing incident power on modulation devices while providing adequate adjoint beam power to effectively pulse the high power laser. In certain embodiments a single gain generator is used to drive the main and auxiliary lasers.

49380362, Jul 3, 1990

Mar 6, 1989

7/318958

David H. Hodgkins - Granby CT
John J. Foley - Bozrah CT

Stanadyne Automotive Corp. - Windsor CT

F02M 5300

623231

A combination air conditioning accumulator and fuel cooler unit comprises an enclosed housing having fuel inlet and outlets, and refrigerant inlets and outlets. Liquid refrigerant entering the unit is evaporated by means of heat exchange with hotter fuel in the unit. Preferably, the housing is in the form of an elongated cylinder and the fuel flow path is coaxial with the housing longitudinal axis. The heat exchanger includes a substantially cylindrical wall within which the fuel flows, and an outer, finned portion in contact with the flow of refrigerant. A desiccant is provided between the refrigerant flow path and the housing, to serve both insulating and moisture-removing functions. A stand pipe is provided to prevent unevaporated freon from exiting and returning in liquid form to the air conditioning compressor. The housing includes end plug members in which the fuel and refrigerant inlets and outlets are formed, the housing being attached to the plug members by crimp connections.