Bauhaus-Universität Weimar

Titel:
L. E. Knott Apparatus Company: Scientific Instruments, Catalogue 26
Person:
Knott, L. E.
PURL:
https://digitalesammlungen.uni-weimar.de/viewer/image/lit13684/254/
SCIENTIFIC INSTRUMENTS 
249 
No. 5547 
FURNACE, ELECTRIC TUBE, for work up to 1100° C 
(2000° F.) for use on alternating circuits only, 110,220 
or 440 volts (60 cycles) alternating current. The heating 
unit is of “ Chromel ” wire, in the form of a coil which 
radiates heat directly on the contents of the furnace. 
Surrounding the heat unit is a layer of special fire-brick 
heat insulation, and outside of this, a sheet iron case. 
The temperature regulation is by means of a control¬ 
ling rheostat. Diameter of chamber 1inches, length 12 
inches. Current consumption 1000 watts. 
5547A Furnace, only........................................$38.85 
5547B Transformer......................................... 33.36 
5547C Controlling Rheostat.................................. 15.66 
5547D Complete Equipment, furnace with controlling rheostat 
and transformer.................................... 87.75 
REPAIR PARTS 
When not heated above 1100° C. (2000° F.) the life of the heating 
unit should be at least 1000 hours. By having at hand extra heating units, 
immediate repairs can be made by the operator. 
5551 EXTRA HEATING COIL for Furnace No. 5547A 
5.55 
No. 5555 
Nos, 5556B to 5559B 
8556 FURNACE, ELECTRIC, MULTIPLE COMBUSTION TUBE, for work up to 1100° C. (2000° F.) 
for use on alternating currents, 110, 220, or 440 volt, 60-cycle lines. The combustion tubes are heated 
by direct radiations from “ hairpin ” heating units between which the tubes lie. Temperature 
regulation is accomplished by means of a regulating transformer. With this furnace, five carbon 
combustions can be run simultaneously and will be found of great convenience and economy where a 
large number of carbon determinations are to be made. Complete with transformer............ 372.50 
5555A EXTRA HEATING UNITS for above (8 per set)....................................Each unit 3.86 
FURNACE, ELECTRIC CRUCIBLE, for use on work requiring temperatures up to 1800° C. (3300° 
F.). Adapts itself to melting point determinations and may be used for melting metals up to 50 lbs. 
weight. Heating chamber is in a vertical position. Carbon which serves as the heating element is 
in the form of plates and these are arranged around the two opposite sides of the heating chamber. 
Temperature regulation is accomplished by adjusting carbon plates upon each other by means of 
two hand screws as shown in the illustration. Furnished for 110, 220 or 440 volts and 60 cycle circuits. 
Auxiliary equipment consists of a transformer and switchboard upon which are mounted a switch, 
circuit breaker and ammeter. 
Chamber Dimensions Current Consumption Furnace Only Complete Equipment 
Width 
Length 
Depth 
at Full Load 
Cat. No. 
Price 
110 volts, 60 cycles 
Cat. No. Price 
4 inches 
4 inches 
4J/2 inches 
12.5 K.W. 
5556A 
$416.65 
5556B 
$776.65 
6 inches 
6 inches 
6^2 inches 
20.0 K.W. 
5557A 
555.50 
5557B 
1034.46 
10 inches 
10 inches 
10 Y2 inches 
45.0 K.W. 
5559A 
888.85 
5559B 
1767.75 
Prices on application for windings other than 110 volts. 
Fused Silica Combustion Tubing No. 6868m (22 mm., (J/% inch) bore) is recommended for all Tube Furnaces.
        

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