Terminal block for single phase or three phase wiring of an imme

Details Terminal block for single phase or three phase wiring of an imme Terminal block for single phase or three phase wiring of an imme

1978-07-21

1980-08-12

Askin, Laramie E.

Electric heating

Heating devices

With heating unit structure

174138R, 219320, 219488, 338295, 338326, 339 32R, H05B 382

Patent

active

042174830

ABSTRACT:
A terminal block for simplified wiring of an electrical immersion heater assembly by providing for either single phase or three phase wire-up in opposite faces of the block. The terminal block has an electrically insulating body of disc-like configuration with three recesses defined in a first face of the block, each recess adapted to receive a lead connecting strap having a pair of apertures. Each of the three recesses has two bores extending into the body, the apertures of the straps alignable with the bores, for receiving leads of three separate heating elements through the apertures and into the bores for three phase wiring in the first face. The opposite face has an X-shaped recess which encompasses only four of the six bores for single phase wiring of four leads of the heating elements with a pair of curved straps. The body is of conical frustrum shape for better sealing characteristics and includes two additional bores adapted for receiving thermowells.

REFERENCES:
patent: 1915199 (1933-06-01), Park
patent: 2155239 (1939-04-01), Randolph
patent: 2321999 (1943-06-01), Dalton
patent: 2531719 (1950-11-01), Alvino
patent: 2594069 (1952-04-01), Poehlmann
patent: 2874317 (1959-02-01), Couse

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