The device consists of a heating unit, a regulator orthermostat which, acting upon a valve or damper, regulates the admission of heat into the insulated box containing the trays of eggs, ventilators and a thermometer (Fig.
As soon as the incubator cools below this temperature, the thermostat contracts, letting the damper drop in place to retain the heat and direct it into the incubator.
Accuracy in reading temperatures and in adjusting the thermostat and ventilators is essential.
If the steam pressure falls low, the thermostat will permit more gas to flow into the radiator by automatically opening the valve.
It guides him in adjusting the thermostat and the heating device; that is, it shows him when to turn the wick of the lamp up or down.
The thermostat works the same when a gas flame is used instead of a lamp.
The thermostat also raises the damper over the top of the lamp and air heater (Fig.
When this scale has been completed, you can use the thermostat as a thermometer.
If everything is working all right, the end of the needle should move when the temperature of the thermostat is changed.
Illustration: Assembled Thermostat] Both contacts must be insulated from the remainder of the thermostat, and may or may not be connected together, depending on how the thermostat is to be used.
The parts of the thermostat thus far made can now be assembled.
By adjusting the position of these contacts, the electrical circuit will be closed when the temperature of the thermostat has reached an experimentally predetermined value.
Increase or decrease the temperature of the thermostat and note the results.
The connections of the thermostat for ringing one bell when the temperature rises to a certain value and another bell when the temperature falls to a certain value, are shown in Fig.
A small wooden containing case can now be made and the thermostat is complete.
The connections of the thermostat for ringing one bell when the temperature rises or falls to a certain value, are shown in Fig.
Should the temperature in the incubator drawer rise, the bimetallic thermostat (R) opens out its coil and pulls down the vertical rod.
Below the tank is the incubation drawer (E), which contains the eggs and also a temperature regulator or thermostat (R).
In the construction of this type of thermostat it is obvious that the greater the difference in the co-efficient of expansion of the two metals used, the larger will be the amplitude of the movement obtained.
Inside the incubation chamber, and situated against its left-hand wall, is a U-shaped bimetallic thermostat of the Roux design, described below.
The thermostat (S) is situated in the upper part of the incubation chamber.
In the latter ease we may classify them according as their thermostat or temperature-regulator is actuated by a liquid expanding with rising temperature, or by solids, usually metals.
The thermostat is lodged in a box (G), which forms part of the lever (L).
If the temperature should rise, the ether in the thermostat expands and pushes the mercury column up along the inclined long limb.
G) it is continued into a detent-like spur (B) which pushes down upon a button attached to a rubber diaphragm, when the thermostat within the incubator is expanded by a rise in temperature.
This arm is operated by the thermostat (R), through the agency of a vertical rod.
It is governed by a bimetallic thermostat of the Roux type.
The thermostat is similar to that in the Hillier machine (fig.
Any change in temperature of the room causes the thermostat to correct in the radiator the required amount of heat.
In such a combination, the draft regulator closes the draft as soon as the pressure reaches the desired point, after which the thermostat does the regulating according to suit the temperature of the house.
In some cases both the damper regulator and the thermostat are used as a more complete means of temperature control.
Thermostat complete with the regulator, battery and motor, attached to a steam supply valve.
Automatic switch which opens the battery circuit when the thermostat motor weight, reaches its limit.
The cord from the regulator, instead of extending directly to the direct-draft damper, passes over the pulley P and connects to the thermostat cord.
Thermostat regulator and motor-valve attached to a radiator.
The strip C of the thermostatcontroller is moving toward J.
The furnace fire is controlled by a thermostatand a damper regulator.
If occasion should require but a very slight amount of steam to keep the house at the desired temperature, the thermostat will govern the drafts aright.
The thermostat motor automatically opens and closes the furnace dampers or the valve that admits steam to the radiators as heat is demanded by the controller.
To provide for more continuous operation and for more exact temperature control, a thermostathas been placed in the duct and is so constructed as to operate some reheater coils beneath the brine-coils in the refrigerating room.
Heat causes brass to expand more than iron and therefore when the temperature reaches a certain height the thermostat curves, so as to break the contact with C, and the lamps go out.
The electric spark which occurs when the thermostatbreaks contact with C causes the metals to corrode at that point, and corroded metals are poor conductors.
When the temperature falls a little the thermostat straightens until contact is again made with C.
Heat is supplied by a gas ring under the copper vessel; and in the gas supply is the patent thermostat made use of by Messrs.
The culture is added, the lid replaced, and the thermostat put into the pocket at the side of the vessel; the gas relighted, and when the temperature reaches 100 deg.
The thermostat is lifted off and the full gas supply allowed to pass to the burner, the temperature of the milk brought up to 180 deg.
Place the thermostat in the end of the box at B, Fig.
The most important part of the incubator is the thermostat which regulates the current to maintain a steady heat.
One of the many examples of the expansion of metals is shown in one form of the thermostat (Fig.
A thermostat is placed in the tempered-air part of the plenum room to maintain the proper temperature of the tempered air.
This thermostat operates the by-pass damper under the tempering coils, and sometimes the valves on the coils.
A thermostat will regulate the temperature to a fraction of any degree.
Study the thermostatsettings on the dial or indicator.
Illustration: The thermostat keeps the iron at an even temperature.
The thermostat keeps the iron at an even temperature after you set it for the heat you want.
Set thethermostat for the amount of heat needed, and with an older person watching you, iron some handkerchiefs, napkins, bath towels, and a pair of play shorts or blue jeans.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "thermostat" in a variety of sentences. We hope that you will now be able to make sentences using this word. Other words: detector; glass; instrument; mercury; thermometer
