AN IMPROVED METHOD OF AND APPARATUS FOR AUTOMATICALLY VENTILATING CONSERVATORIES, PUBLIC, PRIVATE, AND OTHER BUILDINGS AND PLACES
Year: 1878

page_text: PROVISIONAL SPECIFICATION left by William Symonds, junior, at the Office
of the Commissioners of Patents on the 8th March 1878.
WILLIAM SYMONDS, junior, of Guilsborough, Northamptonshire. "AN IMPROVED
METHOD OF AND APPARATUS FOR AUTOMATICALLY VENTILATING CONSERVATORIES,
PUBLIC, PRIVATE, AND OTHER BUILDINGS AND PLACES."
The object of the apparatus is to enable anyone to keep a room to within one or
two degrees of temperature without attention.
The automatic ventilator consists of a frame marked in the Drawing “C," a
galvanic battery, and an ordinary adjustable electric thermometer.
In the frame are fixed at right angles the slips of glass marked "B," their object
being to keep the slips marked "A" at about an angle of 45 degrees, or there-
abouts, when the ventilator is closed. The slips marked "A" turn upon the
points "D" in a vertical position; these slips a are connected at their tops to the
connecting rod "F" by means of the rods "E," the plates of metal "
pivots "G."
x," and the
The action of opening the ventilator is accomplished by means of an electric
current which, when it passes through the electric magnets "K," attracts the
"armature" "L," thereby throwing the rod M" to the right, carrying with it
the connecting rod "F," and turning the slips "A" at right angles, and allowing
a current of air to pass between the slips "A" and "B." The same action takes
place when the ventilator shuts, with the exception that the magnets "J" come
into action and reverse the movement. The battery may be of any good kind of
constant galvanic make. It is connected to the ventilator and the electric ther-
mometer in the usual way by means of wires.
The electric thermometer regulates the current of electricity in precisely the same
way as when used for ringing an electric bell. For instance, if the thermometer is
set on the cold side at 58 the electric circuit will be completed when the mercury
rises on the cold side to 58, or the heat side to 60 degrees. The heat tube is con-
nected with the electro-magnets "K" for opening the slips "A;" the cold tube
to the electro magnets marked "J" for shuting them. The current of electricity
is broken when the action of either opening or shuting the ventilator takes placo

page_text: by means of the "prongs" marked "I," "H," which are fastened to the rod "M."
The prongs throw the buckle "R," "R," from either the connecting points "S" or
"W." The point "S" is in connection with the magnets "K" and point "W"
to magnets J." Thus in the Drawing (which represents the ventilator shut)
magnets "J" have drawn the "armature" "L" down and shut the slips "A."
The prong "I" at the same time striking the buckle "R, R," on the right side,
thereby throwing it on the point "S," breaks the circuit, because "S" is con-
nected with "K" the "K" magnets are then ready to open the slips "A" as
soon as the mercury in the heat tube completes the circuit on the "K" magnet
side. The same action takes place with regard to the disconnection when the "K"
ningnets come into play, the prong "H" then throwing the buckle on "W," the
connecting point of the "J" magnets.
The magnets "O," "O," together with the catch "P," act as a "lock," when either
the slips "A" are open or shut. This "lock" is connected with the electric circuit,
and when a current passes either into magnets "J" or "K," it likewise passes into
magnets "O," "0," attracts "P," and releases the catch marked xx. Thus when the
ventilator opens the catch falls into the slot x,x, and when it shuts into
x
xx.
The whole of the magnets, likewise the connecting rod, are boxed in so as to
protect them from dust, damp, or accident.