Curtis M Johnson

US Patent:

41366050, Jan 30, 1979

Filed:

Oct 14, 1977

Appl. No.:

5/842348

Inventors:

Curtis D. Johnson - Levittown PA

International Classification:

B60H 124

US Classification:

98 218

Abstract:

An opening is formed through the roof of a van. A sealed airtight air chamber is affixed to the roof inside the van and completely covers an area surrounding the opening. A watertight container is mounted in the air chamber beneath the opening in the roof for collecting rain falling through the opening. Air exhaust hosing extends from the air chamber to the roof and floor inside the van.

US Patent:

39874931, Oct 19, 1976

Filed:

Mar 19, 1975

Appl. No.:

5/560261

Inventors:

Curtis R. Johnson - Flourtown PA
Albert E. Paschkis - Gwynedd Valley PA

Assignee:

Leeds & Northrup Company - North Wales PA

International Classification:

G01D 1516
G01D 1510
H01C 702

US Classification:

346139C

Abstract:

A hot stylus using a mandrel of soft material having good heat conductivity and good electrical conductivity is used to carry heat to the writing end of the mandrel. That end fits in an aperture of a jewel bearing surface which rides on the heat sensitive paper. The mandrel is soldered in a groove along a thermistor having a positive temperature coefficient. The mandrel also provides one electrical connection to the thermistor. The other electrical connection is by way of a foil contact soldered to an opposite face of the thermistor. That assembly is potted and assembled on a circuit board which provides the electrical leads from the stylus body to which the foil is soldered and from the mandrel itself.