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Steel Making

Correction By Zero Adjustment
Many pyrometers are supplied with a zero adjuster, by means ...

Shrinking And Enlarging Work
Steel can be shrunk or enlarged by proper heating and cooling...

The Penetration Of Carbon
Carburized mild steel is used to a great extent in the manufa...

Hardening High-speed Steels
We will now take up the matter of hardening high-speed steels...

Nickel
Nickel may be considered as the toughest among the non-rare a...

Protective Screens For Furnaces
Workmen needlessly exposed to the flames, heat and glare from...

Annealing Work
With the exception of several of the higher types of alloy s...

Preventing Decarbonization Of Tool Steel
It is especially important to prevent decarbonization in such...

Robert Mushet
Robert (Forester) Mushet (1811-1891), born in the Forest of D...

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

The Packing Department
In Fig. 56 is shown the packing pots where the work is packe...

Take Time For Hardening
Uneven heating and poor quenching has caused loss of many ve...

Classifications Of Steel
Among makers and sellers, carbon tool-steels are classed by g...

Heat-treating Equipment And Methods For Mass Production
The heat-treating department of the Brown-Lipe-Chapin Company...

The Influence Of Size
The size of the piece influences the physical properties obta...

Application To The Automotive Industry
The information given on the various parts of the Liberty eng...

Manganese
Manganese adds considerably to the tensile strength of steel,...

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

Non-shrinking Oil-hardening Steels
Certain steels have a very low rate of expansion and contract...

Care In Annealing
Not only will benefits in machining be found by careful anne...



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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