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Steel Making

Connecting Rods
The material used for all connecting rods on the Liberty engi...

Preventing Carburizing By Copper-plating
Copper-plating has been found effective and must have a thick...

Correction For Cold-junction Errors
The voltage generated by a thermo-couple of an electric pyrom...

Pyrometry And Pyrometers
A knowledge of the fundamental principles of pyrometry, or th...

Complete Calibration Of Pyrometers
For the complete calibration of a thermo-couple of unknown e...

Composition And Properties Of Steel
It is a remarkable fact that one can look through a dozen tex...

Heating
Although it is possible to work steels cold, to an extent de...

Heating Of Manganese Steel
Another form of heat-treating furnace is that which is used ...

Chromium
Chromium when alloyed with steel, has the characteristic func...

Lathe And Planer Tools
FORGING.--Gently warm the steel to remove any chill, is parti...

Leeds And Northrup Optical Pyrometer
The principles of this very popular method of measuring tempe...

Short Method Of Treatment
In the new method, the packed pots are run into the case-har...

An Automatic Temperature Control Pyrometer
Automatic temperature control instruments are similar to the ...

Case-hardening Treatments For Various Steels
Plain water, salt water and linseed oil are the three most co...

Using Illuminating Gas
The choice of a carburizing furnace depends greatly on the fa...

High-carbon Machinery Steel
The carbon content of this steel is above 30 points and is ha...

Temperature For Annealing
Theoretically, annealing should be accomplished at a tempera...

Separating The Work From The Compound
During the pulling of the heat, the pots are dumped upon a ca...

Pyrometers For Molten Metal
Pyrometers for molten metal are connected to portable thermoc...

Carburizing Material
The simplest carburizing substance is charcoal. It is also th...



Brown Automatic Signaling Pyrometer






Category: PYROMETRY AND PYROMETERS

In large heat-treating plants it has been customary to maintain
an operator at a central pyrometer, and by colored electric lights
at the furnaces, signal whether the temperatures are correct or
not. It is common practice to locate three lights above each
furnace-red, white and green. The red light burns when the temperature
is too low, the white light when the temperature is within certain
limits--for example, 20 deg.F. of the correct temperature--and the
green light when the temperature is too high.



Instruments to operate the lights automatically have been devised and
one made by Brown is shown in Fig. 130. The same form of instrument is
used for this purpose to automatically control furnace temperatures,
and the pointer is depressed at intervals of every 10 sec. on contacts
corresponding to the red, white and green lights.





Next: An Automatic Temperature Control Pyrometer

Previous: Compensating Leads



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