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   Bimetals, Thermostatic

A bi-metallic strip is used to convert a temperature change into mechanical displacement. The strip consists of two strips of different metals which expand at different rates as they are heated, usually steel and copper. The strips are joined together throughout their length by rivets, by brazing or by welding. The different expansions force the flat strip to bend one way if heated, and in the opposite direction if cooled below its normal temperature. The metal with the higher expansion is on the outer side of the curve when the strip is heated and on the inner side when cooled.

The sideways displacement of the strip is much larger than the small lengthways expansion in either of the two metals. This effect is used in a range of mechanical and electrical devices. In some applications the bi-metal strip is used in the flat form. In others, it is wrapped into a coil for compactness. The greater length of the coiled version gives improved sensitivity.



Bronze Partners
Airpax Corporation
Airpax Corporation Thermal Sensing Products
AMI DODUCO
Cantherm-Canadian Thermostats & Control Devices Ltd.
CIT Relay and Switch
Electronic Development Labs Inc.
Hyndman Industrial Products Inc.
Mechanical Products Co.
Omega Engineering Inc.
Portage Electric Products Inc
Schurter, Inc.
Selco Products
STEGO, Inc
Texas Instruments
Therm-O-Disc, Inc.
Fixed and programmable amplifiers - Frequency Devices

 

Books
Thermostatic bimetal production in Germany (Germany) (Germany)
Helmich W Boessenkool

Carter Carburetors
Dave Emanuel

Excerpt - page 36: "... (sometimes from the exhaust manifold) was piped directly to a bimetal thermostatic spring, which warmed, changed its shape, and opened the choke. ..."
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Thin Film Materials: Stress, Defect Formation and Surface Evolution
L. B. Freund and S. Suresh

Excerpt - page 102: "... - af)(T - To) = ME,,,. 2.2.3 Historical note on thermostatic bimetals A thermostatic bimetal is a layered component made by bonding ..."
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Mechanisms and Mechanical Devices Sourcebook
Neil Sclater and Nicholas Chironis

Excerpt - page 393: "... gasoline level are indicated electrically on automobile dashboard instruments whose bimetal element is both the sender ... contact is carried by another thermostatic bimetal strip; in the gasoline-level device, the contact is shifted ..."
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Total Automotive Technology
Anthony E. Schwaller

Excerpt - page 446: "... 446 Section 3 Mechanical/Fluid Bimetal ' thermostatic spring FIGURE 27-18 A heat riser is used to increase ..."
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Facilities Operations & Engineering Reference: A Technical & Management Handbook for Planning & Analyzing Projects, Complying With Codes & Standards
Association for Facilities Engineering

Excerpt - page 494: "... starter. NEMA starters have most often used "melting alloy" overloads. Bimetal thermostatic types are also widely offered. To allow easy interchangeability with ..."
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Greenberg's Repair and Operating Manual for Lionel Trains, 1945-1969 (Greenberg's Repair and Operating Manuals)
Roger Carp

Excerpt - page 353: "... exists only through the fine nichrome wire wound about the thermostatic bimetal strip of the switch. When a train reaches the insulated ..."
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Your Mobile Home: Energy and Repair Guide for Manufactured Housing, 5th Edition
John T. Krigger

Excerpt - page 147: "... mobile home heating systems use 24- volt control systems and bimetal thermostatic controls. Commonly used voltage in most homes is 120 volts. ..."
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The Measurement, Instrumentation and Sensors Handbook
John G. Webster

Excerpt - page 935: "... [7]. The following equations have been taken from the Kanthal Thermostatic Bimetal Handbook [8], with some change in notation. The angular rotation ..."
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Handbook of Air Conditioning Heating and Ventilating
Eugene Stamper, Richard L. Koral, and Clifford Strock

Excerpt - page 1187: "... t hp have an overload device consisting of a snap-acting, thermostatic , bimetal disc and a heater located outside of the compressor shell, ..."
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Holly 4150 Hp473
Mike Urich

Excerpt - page 38: "... 7 CHOKE SYSTEM coil )Thermostatic (bimetal) Warm air from choke stove Manifold vacuum passage Choke plate ..."
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Understanding Electro-Mechanical Engineering: An Introduction to Mechatronics (IEEE Press Understanding Science & Technology Series)
Lawrence J. Kamm

Excerpt - page 151: "... usually enclosed in expandable bellows. Solids are usually laminated into thermostatic bimetal, two layers of different metals with different coefficients of expansion, ..."
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Van Nostrand's Scientific Encyclopedia 2 Volume Set
Glenn D. Considine

Excerpt - page 423: "... normally weighs about 220 pounds (100 kilograms). See also Fishes. BIMETAL THERMOMETER. Thermostatic bimetal can be defined as a composite material, made up ..."
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Antique Electric Waffle Irons 1900-1960: A History of the Appliance Industry in 20th Century America
William F. George

Excerpt - page 166: "... dimpled cooking grids. Both irons employ a non-adjustable, hermetically sealed, bimetal thermostatic switch that Edison labeled the "Birka Heat Regulator." Upon close ..."
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Practical Temperature Measurement
Peter Childs

Excerpt - page 76: "... remote indication of temperature. References Books and papers Divita, R.V Bimetal thermometer selection. Measurements and Control, 167, 93-95, 1994. Eskin, S.G. Thermostatic bimetals. Trans. ASME, 433-442, 1940. Huston, WD. The accuracy and ..."
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Refrigeration and Air Conditioning, Third Edition
A R TROTT and T C Welch

Excerpt - page 326: "... 31.4.) Two-position detectors can be classified according to the purpose: Thermostatic bimetal liquid expansion solid expansion vapour pressure Pressure diaphragm bellows bourdon ..."
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HVAC/R Terminology: A Quick Reference Guide (Second Edition)
Richard Wirtz

Excerpt - page 292: "... change over, emergency heat, continuous fan operation, or off position. Thermostatic control - a device that ... two types of elements are bimetal and bulb. Thermostatic expansion valve (TXV) - a control valve ..."
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Maintenance Manual, Willys MB: TM 10-1513
Willys-Overland Motors in

Excerpt - page 16: "... against the intake Manifold. As the engine warms up, the thermostatic (or Bimetal) spring No. 7 expands and opens the valve directing the ..."
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Mechanical Variables Measurement - Solid, Fluid, and Thermal
John G. Webster

Excerpt - page 419: "... [7]. The following equations have been taken from the Kanthal Thermostatic Bimetal Handbook [8], with some change in notation. The angular rotation ..."
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Integrating Electrical Heating Elements in Appliance Design (Electrical and Computer Engineering)
Hegbom

Excerpt - page 48: "... case is represented by the wire or ribbon around a thermostatic bimetal in a motor protector exposed to a short circuit (see ..."
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The Boatowner's Guide to Corrosion
Everett Collier

Excerpt - page 115: "... metals bonded together. Perhaps the most familiar application is a thermostatic bimetal, in which a metal or alloy with a high coefficient ..."
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Ferroelectric Transducers and Sensors (Electrocomponent Science Monographs)
J. M. Herbert

Excerpt - Back Matter: "... P. Martin and N. Yarworth. The theory and use of thermostatic bimetals. Engineering. 22nd Sept. 1961. 170. M.R. Steel, F. Harrison and ..."
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Standard & Poor's Guide to Technology Stocks
STANDARD & POOR

Excerpt - page 235: "... (47% and 40%) makes electrical contacts and assemblies, contact materials, thermostatic bimetals, clad metal products, and precision contact subassemblies . It also ..."
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Electrical Engineer's Reference Book (Electrical Engineer's Reference Book)
M A LAUGHTON and D F Warne

Excerpt - page 279: "... of the high-temperature solders necessary in these techniques. 10.8 Temperature-sensitive bimetals Temperature-sensitive bimetals, commonly known as thermostatic bimetals, are produced by bonding together two metals having different ..."
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Plumbing Encyclopaedia
R. D. Treloar

Excerpt - page 417: "... )oiling point imetallic er than water) strip et ~ Ive bimetal trap thermostatic or expansion traps inlet e# r outlet oat float ..."
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'Your Mobile Home : Energy and Repair Guide for Manufactured Housing
John T. Krigger, Marty Lord, and Bob Starkey

Excerpt - page 142: "... all mobile home heating systems use 24-volt control systems and bimetal thermostatic controls. Commonly used voltage in most homes is 120 volts. ..."
See more references to Bimetals, Thermostatic in this book.
Encyclopedia of Chemical Processing and Design (Encyclopedia of Chemical Processing and Design)
John J. McKetta

Excerpt - page 91: "... Balanced pressure thermostatic (BP) Bimetal thermostatic (BM) Thermodynamic (TD) Small and lightweight Maximum discharge of noncondensibles ..."
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