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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,...

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

Ebbw Vale And The Bessemer Process
After his British Association address in August 1856, Besseme...

Carbon In Tool Steel
Carbon tool steel, or tool steel as it is commonly called, us...

Testing And Inspection Of Heat Treatment
The hard parts of the gear must be so hard that a new mill f...

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

Annealing
There is no mystery or secret about the proper annealing of d...

S A E Heat Treatments
The Society of Automotive Engineers have adopted certain heat...

Refining The Grain
This is remedied by reheating the piece to a temperature slig...

Quality And Structure
The quality of high-speed steel is dependent to a very great ...

Application Of Liberty Engine Materials To The Automotive Industry
The success of the Liberty engine program was an engineer...

Standard Analysis
The selection of a standard analysis by the manufacturer is t...

Annealing
ANNEALING can be done by heating to temperatures ranging from...

Hardening Operation
Hardening a gear is accomplished as follows: The gear is tak...

Heat Treatment Of Punches And Dies Shears Taps Etc
HEATING.--The degree to which tools of the above classes shou...

Double Annealing
Water annealing consists in heating the piece, allowing it to...

Knowing What Takes Place
How are we to know if we have given a piece of steel the ver...

Effects Of Proper Annealing
Proper annealing of low-carbon steels causes a complete solu...

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



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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