Used as a foundation for all cream candies. Put two and one-half cups of granulated sugar in a saucepan, add three-fourths cup of hot water and one-half saltspoon of tartar. Stir until sugar is dissolved, but no longer. Boil without stirring until, w... Read more of WHITE FONDANT at Home Made Cookies.caInformational Site Network Informational
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Steel Making

Open Hearth Process
The open hearth furnace consists of a big brick room with a l...

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

The Forging Of Steel
So much depends upon the forging of steel that this operation...

Plant For Forging Rifle Barrels
The forging of rifle barrels in large quantities and heat-tre...

Instructions For Working High-speed Steel
Owing to the wide variations in the composition of high-speed...

Impact Tests
Impact tests are of considerable importance as an indication ...

Annealing Of Rifle Components At Springfield Armory
In general, all forgings of the components of the arms manufa...

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

Carbon Steels For Different Tools
All users of tool steels should carefully study the different...

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

The Pyrometer And Its Use
In the heat treatment of steel, it has become absolutely nece...

Silicon
Silicon prevents, to a large extent, defects such as gas bubb...

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

Optical System And Electrical Circuit Of The Leeds & Northrup Optical Pyrometer
For extremely high temperature, the optical pyrometer is lar...

High-chromium Or Rust-proof Steel
High-chromium, or what is called stainless steel containing f...

Silicon
SILICON is a very widespread element (symbol Si), being an es...

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

Crucible Steel
Crucible steel is still made by melting material in a clay or...

Tensile Properties
Strength of a metal is usually expressed in the number of pou...

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



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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