JB/106/047/002

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Tepidarium 4 Septr 1800

General Idea

A constant cause
of calefaction whether
lamp or culinary
fire constantly
sufficient to
maintain in the
Tepidarium (whether
Air Chamber
or Balneum a
degree of temperature
above the degree
required.-

The function
of the regulator
being to reduce the
temperature to the
degree required:-

The heat when
above the degree
required acting
on the regulator
causes it to open
a valve which
lets out a part
of the air or water
of the tepidarium
and lets
in cold air or
water in the
room of it.-

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Regulating Valve

1. The valve a
flat plate lying
upon an aperture
and closing it
by its weight.

A tube open
at bottom closed
at top containing
fluid Mercury
or water with a
cylindrical Cork
floating on it.
A wire stuck
thro' the Cork in
the center of it
rises with the
Cork and pushes
up the Valve the
heat causing the
fluid in the tube
to expand and the
expansion causing
it to rise and
raise the cork with
it.

2. The valve a
circular or semi-
circular plate twining
on a hinge
in the circumference
of the circle
or on the axis of
the semi-circle.

The valve may
be opened by the
wire rising against
it as above
or by a lever the
power of which
is increased by
an influx of
Mercury towards
the extremity of
the lever the influx

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being produced by
and proportioned
to the expansion
produced by heat
as above.

The expansion
of air being so
much greater
than that of Mercury
in a given
degree of heat could
not a portion of
air be made to
form part of
the expansible
mass of which
the Regulator is
composed? —

If for example
a very small
bladder half-filled
with air and
perfectly closed
were let down
and fastened to
the bottom of the
tube the Mercury
or Water resting
on it. —

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This supposes
the required heat
of the Tepidarium
to be greater than
the greatest heat
of the atmosphere
in this country
(say 90).—

For lesser degree
a Frigidarium
must be connected
with the Tepidarium.

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Identifier: | JB/106/047/002 "JB/" can not be assigned to a declared number type with value 106.
Date_1	1800-09-04	Marginal Summary Numbering
Box	106	Main Headings	frigidarium
Folio number	047	Info in main headings field	frigidarium no 12
Image	002	Titles	general idea - regulating valve
Category	plan	Number of Pages	2
Recto/Verso	recto	Page Numbering
Penner	fr3	Watermarks	1798 am
Marginals		Paper Producer
Corrections		Paper Produced in Year	1798
Notes public		ID Number	34635
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