ROBERT J ROBINSON
Engineering in Derry, NH
License number
Massachusetts 8007
Issued Date
Sep 13, 1957
Expiration Date
Jun 30, 2004
Type
Mechanical Engineer
Address
Address
Derry, NH 03038
Professional information
Sensitive Electrical To Mechanical Transducer
US Patent:
5022425, Jun 11, 1991
Filed:
Mar 28, 1990
Appl. No.:
7/500524
Inventors:
Robert C. Prescott - N. Marshfield MA
Robert J. Robinson - Derry NH
Robert J. Robinson - Derry NH
Assignee:
Dresser Industries Inc. - Dallas TX
International Classification:
G05D 1600
US Classification:
137 82
Abstract:
A transducer having a cross field polarized permanent magnet mounted for slight pivotal movement within an annular coil winding. The magnet comprises neodymium-iron-boron to provide a compact, lightweight, low inertia and high intensity magnetic field. A magnetic field generated by current in the coil winding influences the permanent magnet to pivot slightly about a horizontal axis and rotate a yoke structure to produce a mechanical output of the transducer. In the preferred embodiment of the invention, the yoke is attached to a spring arm for controlling escape gas pressure from a nozzle to thereby control the pressure of a gas stream.
Sensitive Electrical To Mechanical Transducer
US Patent:
4926896, May 22, 1990
Filed:
Dec 23, 1988
Appl. No.:
7/289224
Inventors:
Robert C. Prescott - N. Marshfield MA
Robert J. Robinson - Derry NH
Robert J. Robinson - Derry NH
Assignee:
Dresser Industries, Inc. - Dallas TX
International Classification:
G05D 1600, H01F 714
US Classification:
137 82
Abstract:
A transducer having a cross field polarized permanent magnet mounted for slight pivotal movement within an annular coil winding. The magnet comprises neodymium-iron-boron to provide a compact, lightweight, low inertia and high intensity magnetic field. A magnetic field generated by current in the coil winding influences the permanent magnet to pivot slightly about a horizontal axis and rotate a yoke structure to produce a mechanical output of the transducer. In the preferred embodiment of the invention, the yoke is attached to a spring arm for controlling escape gas pressure from a nozzle to thereby control the pressure of a gas stream.