IMPROVEMENTS IN THERMOSTATS
Year: 1885

page_text: I WILLIAM EDWARD GEDGE of No 11 Wellington Street Strand London in the
County of Middlesex Patent Agent, do hereby declare the nature of my invention
for "IMPROVEMENTS IN THERMOSTATS" (a communication from abroad by Herman
Frederick Perry of 187 Hyde Street San Francisco, California, United States of
America Gentleman) and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement :-
My Invention relates to that class of heat regulators, in which the expansive
force of the air is utilized for the purpose of transmitting power through suitable
intermediate mechanism, to cause a variation in the amount of heat supplied; and
my invention consists of an air tight independent air-chamber, located within the
apartment to be regulated, a vertically moving casing or vessel, inverted within an
exterior casing or vessel containing a liquid seal, a Connection between the inner
vessel and the air-chamber, and a peculiar string or lever connection between said
vessel and the heat adjusting apparatus; all of which I shall hereinafter fully
explain.
The object of my invention is to regulate by simple and available means the
temperature of any apartment.
I herein illustrate my regulating apparatus in connection with the egg-chamber
of an incubator.
Referring to the accompanying drawings;
The Figure is a side elevation of my regulator.
A represents the egg-chamber of an incubator. In one end of this chamber is
located an air-tight chamber B, of any suitable shape and dimensions.
Near the air-chamber is a vessel C, containing a liquid D. E is a casing or
vessel, inverted in the liquid in Vessel C, and small enough to readily fit, and rise
and fall in said vessel.
F is a pipe, which leads from the air-chamber B, through the side of vessel C,
and thence extends upwardly through the liquid D and the vessel E into the air-
space in the top of said vessel.

page_text: G is a flexible string of any suitable material, which is attached at the point g;
it thence extends upwardly through a suitable guide socket gl on one edge of the
top of the inverted vessel E, and over to a second guide-socket g' on the other edge
of the top of said vessel; thence downwardly through suitable guide-sockets g³,
and g, and up again to the lever H, by which a sleeve I is operated, to regulate
the flame of the lamp J.
The operation of the device is as follows;
When the temperature of the egg-chamber A rises, the air within chamber B
expands, and passing through pipe F raises the inverted vessel E; this movement
of said vessel pulls the string G, so as to lower the lever H, and move the sleeve I
upwardly to partially inclose and thereby reduce the flame of the lamp in a manner
which is usual and well known.
There is a novelty in the manner of attaching the string G to the vertically
moving inverted vessel E. It might, of course, be secured by one end to said vessel
and thence pass to the lever H, but in such a case the amount of motion imparted
to the lever H would be exactly the same as that which the inverted vessel E
receives; but by attaching the string at the point g, and thence carrying it up over
the top of the vessel E, and down again on the other side, it is obvious that said
vessel in moving a certain distance causes the lever H, to move twice that distance,
whereby the apparatus is rendered very delicate, in that a very small movement of
vessel E is sufficient to cause a greater movement in the lever H.
The whole apparatus is very simple and inexpensive, and at the same time is
very effective and accurate in its operation.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is
•
1. A heat-regulating apparatus comprising an air-tight air-chamber within the
apartment to be regulated, a vessel containing a liquid, a vessel inverted in the
liquid, a connection or communication between the air-chamber and the inverted
vessel; whereby the expansive force of the air causes the vertical movement of said
vessel, and a connection between said vessel and the device regulating or controlling
the source of heat, substantially as heréin described.
2. A heat regulating apparatus comprising the air-tight air-chamber, the vesse!
containing liquid, the vessel inverted therein, and having a communication with
the air-chamber, and a string connecting the said inverted vessel with the device
controlling the source of heat, substantially as herein described.
3. A heat regulating apparatus, comprising the air-tight air-chamber, the vessel
containing liquid, the vessel inverted therein, and having a communication with the
air-chamber, and the string attached below and at one side of the inverted vessel,
and thence extending upwardly over the top of the vessel in suitable guides thereon,
and downwardly on the other side and attached to the heat adjusting device,
whereby the movement of the inverted vessel imparts increased movement to the
heat adjusting device substantially as described.
COL 1
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