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Cyanide Bath For Tool Steels
All high-carbon tool steels are heated in a cyanide bath. Wi...

Rate Of Cooling
At the option of the manufacturer, the above treatment of gea...

Composition Of Transmission-gear Steel
If the nickel content of this steel is eliminated, and the pe...

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

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

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

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

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

Carburizing By Gas
The process of carburizing by gas, briefly mentioned on page ...

William Kelly's Air-boiling Process
An account of Bessemer's address to the British Association w...

The Quenching Tank
The quenching tank is an important feature of apparatus in c...

Properties Of Alloy Steels
The following table shows the percentages of carbon, manganes...

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...

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

Annealing In Bone
Steel and cast iron may both be annealed in granulated bone. ...

Hardening Carbon Steel For Tools
For years the toolmaker had full sway in regard to make of st...

Brown Automatic Signaling Pyrometer
In large heat-treating plants it has been customary to mainta...

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

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



Pyrometers For Molten Metal






Category: PYROMETRY AND PYROMETERS

Pyrometers for molten metal are connected to portable thermocouples
as in Fig. 132. Usually the pyrometer is portable, as shown in
this case, which is a Brown. Other methods of mounting for this
kind of work arc shown in Figs. 133 and 134. The bent mountings
are designed for molten metal, such as brass or copper and are
supplied with either clay, graphite or carborundum tubes. Fifteen
feet of connecting wire is usually supplied.

The angle mountings, Fig. 134, are recommended for baths such as
lead or cyanide. The horizontal arm is usually about 14 in. long,
and the whole mounting is easily taken apart making replacements
very easy. Details of the thermo-couple shown in Fig. 132 are given
in Fig. 135. This is a straight rod with a protector for the hand
of the operator. The lag in such couples is less than one minute.
These are Englehard mountings.





Next: Protectors For Thermo-couples

Previous: An Automatic Temperature Control Pyrometer



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