Rosemount Inc.

N.a. Trading and Technology

Theodore L Johnson

Theodore Henry Schnaare

David Erich Tetzlaff

Stephen D Anderson

Garrie David Huisenga

Brian Scott Junk

Joel J Bodin

William C Rauth

Michael A Orman

Sheldon S Puska

Paul A Macht

A roller cleaning apparatus for retrofit installation in a photocopier fuser assembly having a housing and a fuser roller mounted in the housing. The apparatus may comprise a mounting strip adapted to engage a surface within the housing, a pair of resilient brackets spaced apart on the mounting strip, and a cleaning roller. Each of the resilient brackets has a bearing portion, and the cleaning roller is disposed between the pair of resilient brackets. The cleaning roller has a pair of opposing ends, each rotationally mounted in one of the bearing portions. The resilient brackets are configured so as to bias the cleaning roller against the fuser roller when the mounting strip is engaged with the housing. Also, a method for installing a roller cleaning apparatus in a photocopier fuser assembly.

Retrofit cleaning roller assembly

A field instrument includes an input circuit having a transistor bridge rectifier which is couplable to a power supply. The transistor bridge rectifier is configured to provide power from the power supply to a remainder of the field instrument.

Power supply input circuit for field instrument

A transmitter coupled to a control loop which carries a loop current senses a process variable which is transmitted over the loop. Circuitry in the transmitter presents an effective capacitance C.sub.eff to the control loop. The transmitter includes an isolation network coupled between the circuitry and the control loop which prevents discharge of energy stored in capacitance C.sub.eff into the control loop.

Transmitter with electrical circuitry for inhibiting discharge of stored

A transmitter comprises a housing, an electronics assembly, an inner cover, and an outer cover. The electronics assembly includes an actuatable switch and fits within an open-ended cavity in the housing. The inner cover is positionable over the open end to cover the electronics assembly and has a deflectable button portion which is alignable with the actuatable switch and accessable from the open end while the electronics assembly is energized. The inner cover is electrically conductive and has a sleeve which frictionally mates with electrically conductive walls of the housing to shield the electronics assembly from electromagnetic interference (EMI). The inner cover is preferably an insulating molded plastic part with a thin metallic coating.

Process transmitter with inner conductive cover for EMI shielding

Growing community of inventors

St. Louis Park, MN, United States of America

Theodore L Johnson