Peter M Gilbert

US Patent:

52258335, Jul 6, 1993

Filed:

Oct 20, 1989

Appl. No.:

7/425848

Inventors:

Edward G. Fisher - Hudson NH
Peter D. Gilbert - Leominster MA

Assignee:

Digital Equipment Corporation - Maynard MA

International Classification:

H03M 700

US Classification:

341 90

Abstract:

A method of encoding the characters of a character set, wherein the characters have a plurality of attributes (e. g. , base, diacritical, and case), and wherein each attribute may have a plurality of values. The method comprises the steps of: dividing a multi-digit code into a plurality of parts, assigning each attribute to a different part, and, within each part, assigning a different numerical code to each different value of the attribute.

US Patent:

49356984, Jun 19, 1990

Filed:

Mar 3, 1989

Appl. No.:

7/318265

Inventors:

Hideki Kawaji - Andover NH
Peter J. Gilbert - Henniker NH

Assignee:

Sprague Electric Company - North Adams MA

International Classification:

G01B 714
H01L 4306

US Classification:

32420720

Abstract:

A Hall elements and magnet assembly for use as a proximity detector includes a magnet, a pole piece mounted to one pole end of the magnet and an integrated circuit having two side-by-side Hall elements, an amplifier, interconnecting wiring providing the difference voltage between the two Hall output voltages at the input of the amplifier, and a Schmitt trigger circuit. The integrated circuit is mounted to the pole piece at the pole end of the magnet. The pole piece is a ferromagnetic member which is thinner in the center than at the periphery for achieving a highly uniform field strength across the surface of the magnet pole end toward reducing the criticality of the position of mounting of the integrated circuit in manufacturing and for extending the range of gap dimensions between a passing ferromagnetic article and the assembly for which proper detection of the passing article can be made to occur. The term "ferromagnetic" as used herein means any material with a relative permeability greater than unity and preferably greater than 100.