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/lit13684/289/
284 
L. E. KNOTT APPARATUS COMPANY 
No. 6395 
No. 6396 
6395 PULVERIZER or CRUSHER, One-jar Ball Mill, hand or power, for reducing to powder cement, coal, 
lime, and any material, hard or soft. Widely used in assay, cement, gas and soils laboratories. Por¬ 
celain jar, capacity gallons; pulley 9X1 inch. Equipped with handle for hand drive, and com¬ 
plete with pebbles........................................................................$35.00 
6396 --, Two-jar Ball Mill, similar to above, but two jars mounted on same axis, giving double the 
capacity of No. 6395...................................................................... 65.00 
PYROMETERS 
INDICATING METERS — THERMO-COUPLES 
A Pyrometer of two essential parts — the Meter which indicates or records the temperature and the Thermo- 
Couple which, on being placed in the heat to be measured, generates the electromotive force that actuates the meter. 
We have listed below two different types of meters each of which can be obtained with different ranges and 
graduated in Fahrenheit or Centigrade divisions. We have also listed various types 
of thermo-couples. From among these listed it will be possible to select types and 
ranges suited to individual requirements. To insure getting the proper outfit, it is 
advisable to inform us in regard to the service for which it is to be used. 
PORTABLE INDICATING METERS. These are the highest grade D’Ar- 
sonval type Milli-voltmeters designed especially for pyrometer work. They are 
very sensitive high-torque meters, provided with: 
1 Zero Temperature Adjustment which insures meter indicating correctly regardless of 
the temperature of the surrounding media. 
2 Zero Adjustor which is a simple device for setting the pointer to agree with the cold 
end temperature of the Thermo-couple. 
3 Resilient Pivot Mounting which permits the utmost delicacy in adjustment of the 
. movement, and by protecting it from the effects of jars and vibrations, preserves its 
accuracy. 
The case is of aluminum, finished in black enamel. Over all dimensions are 
Nos. 6397 to 6400C 6J4X6X3 inches. Scales are 5Yi inches. 
The Low Resistance Meter can be used when the resistance of the lead wires is not over jqj ohm. This is the 
resistance offered by 100 feet of No. 14, or 150 feet of No. 12, or 250 feet of No. 10 copper wire. Generally speaking, 
if the lead wires are to be more than 200 feet, the High Resistance Meter must be used. High Resistance Meters are 
equipped with both milli-volt and temperature scales and they also carry a mirror. 
6397 LOW RESISTANCE PORTABLE METER, range 32-1000° F., 10 degrees per division..........$66.65 
6397A , range 0-550° C., 5 degrees per division.................................................. 66.65 
6397B HIGH RESISTANCE PORTABLE METER, range 32-1000° F., 10 degrees per division.......... 83.36 
6397C--, range 0-550° C., 5 degrees per division................................................. 83.35 
6398 LOW RESISTANCE PORTABLE METER, 32-1500° F., 20 degrees per division................ 66.65 
6398A--, 0-800° C., 10 degrees per division..................................................... 66.65 
6398B HIGH RESISTANCE PORTABLE METER, 32-1500° F., 10 degrees per division.............. 83.35 
6398C--, 0-800° C., 10 degrees per division................................................... 83.35 
6399 LOW RESISTANCE PORTABLE METER, 32-2000° F., 20 degrees per division................ 66.65 
6399A -, 0-1100° C., 10 degrees per division..................................................... 66.65 
6399B HIGH RESISTANCE PORTABLE METER, 32-2000° F., 20 degrees per division............... 83.35 
6399C -, 0-1100° C., 10 degrees per division.................................................... 83.35 
6400 LOW RESISTANCE PORTABLE METER, 32-2500° F., 25 degrees per division................ 66.65 
6400A -, 0-1400° C., 20 degrees per division..................................................... 66.65 
6400B HIGH RESISTANCE PORTABLE METER, 32-2500° F., 20 degrees per division............... 83.35 
6400C -, 0-1400° C., 10 degrees per division................................................. .. 83,36s
        

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