Richard W Longsderff

US Patent:

39769569, Aug 24, 1976

Filed:

Dec 10, 1974

Appl. No.:

5/531395

Inventors:

Richard William Longsderff - Lancaster PA
Donald Bernard Kaiser - Lancaster PA

Assignee:

RCA Corporation - New York NY

International Classification:

H01S 308
H01S 3082

US Classification:

331 945D

Abstract:

The metal end plates of a laser device are provided with relatively large annular hub portions extending outwardly from the laser envelope. Glass mirror blocks are used, each having a small area of a reflective coating in the center of one surface of the block. To bond the block to an end plate of the laser device, the mirror is aligned substantially on the axis of the hub and rf energy is used to heat the end of the hub to a sufficiently high temperature to seal it to the glass. The hub is brought into contact with the glass surface of the mirror block and a seal is made without damage to the mirror coating.

US Patent:

55491553, Aug 27, 1996

Filed:

Apr 18, 1995

Appl. No.:

8/424791

Inventors:

George A. Meyer - Conestoga PA
Jerome E. Toth - Hatboro PA
Richard W. Longsderff - Lancaster PA

Assignee:

Thermacore, Inc. - Lancaster PA

International Classification:

F28D 1500

US Classification:

16510433

Abstract:

The apparatus is a cooling device for an integrated circuit chip which includes a heat conductive pad for contact with the top surface of the chip and for attachment to a heat pipe to dispose of the heat. One surface of the pad is flat and contacts the circuit chip while the opposite surface of the pad is attached to a simple cylindrical heat pipe. The pad includes extensions from its sides to which a holding fixture applies force so that the pad is held tightly against the chip. The holding fixture is held on the mounting board by screws while the top of the pad which is attached to the heat pipe protrudes through a hole in the holding fixture. A finned heat exchanger is attached to an end of the heat pipe remote from the conductive pad.

US Patent:

42339367, Nov 18, 1980

Filed:

May 8, 1979

Appl. No.:

6/037117

Inventors:

Richard W. Longsderff - Lancaster PA
Dale V. Henry - Lancaster PA

Assignee:

RCA Corporation - New York NY

International Classification:

B44D 102
C23D 102

US Classification:

118726

Abstract:

An alkali metal dispenser in an electron tube for vapor depositing alkali metals on photoemissive surface within the tube envelope comprises a non-welded-tubular housing having walls formed by spirally rolling upon itself a thin sheet of tantalum so that the walls spirally overlap, preferably twice. The "double wrapped" dispenser prevents uncontrollable escape of alkali particles contained within the interior of the tubular housing and provides a substantially uniform orifice for repeatable release of alkali vapors.

US Patent:

58221875, Oct 13, 1998

Filed:

Oct 25, 1996

Appl. No.:

8/735191

Inventors:

Scott D. Garner - Lititz PA
George A. Meyer - Conestoga PA
Jerome E. Toth - Hatboro PA
Richard W. Longsderff - Lancaster PA

Assignee:

Thermal Corp. - Georgetown DE

International Classification:

G06F 120
H05K 720
F28D 1502

US Classification:

361687

Abstract:

The apparatus is a device for transferring heat across the hinged joint between the two sections of the case of a laptop computer. Two simple heat pipe cylinders are inserted into parallel cylindrical holes in a heat conductive block. One cylinder is bonded within its hole, and the other cylinder is permitted to rotate within its hole. The axis of the rotatable cylinder is located in line with the axis of the mechanical hinges which permit the panels to pivot relative to each other. A heat producing device in one panel can be then attached to one heat pipe, and a heat sink on the other panel can be attached to the other heat pipe. The heat transfer between the heat source and the heat sink is essentially that of a heat pipe except for the very short heat conductive path through the solid block and the one rotating joint.

US Patent:

43573681, Nov 2, 1982

Filed:

Dec 26, 1978

Appl. No.:

5/973455

Inventors:

Richard W. Longsderff - Lancaster PA
Dale V. Henry - Lancaster PA

Assignee:

RCA Corporation - New York NY

International Classification:

H01J 912
H01J 4006

US Classification:

427 74

Abstract:

A film of photoemissive material, such as antimony, is vaporized from a platinum-antimony source onto a substrate in an enclosure. The source is preferably a plurality of beads formed by attaching substantially spherical particles of platinum-antimony (50--50 by atomic volume) to a platinum-clad molybdenum wire. The spherical particles are accurately sized so that each bead comprises substantially the same amount of antimony. The beads are symmetrically arranged about the substrate so that upon evaporation a substantially uniform film of photoemissive material is deposited on the substrate.