An Improved Ventilator with Opening, Setting, and Closing Arrangements.
Year: 1892

page_text: Date of Application, 26th Sept., 1892
Complete Specification Left, 7th Apr., 1893-Accepted, 17th June, 1893
PROVISIONAL SPECIFICATION.
An Improved Ventilator with Opening, Setting, and Closing
Arrangements.
GEORGE HENRY BARTLETT 7 St. Georges Place Upper Bristol Road Bath
Metal Plate Worker.
The improvement of this ventilator consist of the action of opening setting &
closing the apparatis can be fixed at any height in a room and is worked from floor
level by a cord or wire suspended from lever the ventilator is worked by means of
a side motion with a connecting rod to take the cranks of each shutter the top of
this connecting rod is fitted with a hook which links into the top a spiral spring the
spiral spring is fastened at the bottom by an hook fixed to casing which keeps
ventilator closed with the connecting rod is attached wire spindles which are fitted
to each shutter and pass the whole length turning on bearings in case.
The opening setting & closing is performed by the lever which takes a
fulcrumb on hook fixed to casing the lever is made with a forked end inside which
catches under the ball shaped part of connecting rod & works from right to left.
When the lever is pulled down the shutters open the lever is drawn into the
slot on right hand side of face plate the ventilator is set and to close pull the cord
or wire to the left hand releasing it from slot & the spiral spring closes any number
of ventilating shutters can be applide to the connecting rod."
November 14th.
GEORGE HENRY BARTLETT.
COMPLETE SPECIFICATION.
An Improved Ventilator with Opening, Setting, and Closing
Arrangements.
GEORGE HENRY BARTLETT 7 St. Georges' Place Upper Bristol Road Bath
Metal Plate Worker do hereby declare the nature of this invention and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :-
To enable the said invention to be properly understood the accompanying drawing
is enclosed,-
Fig. 1, represents a perspective view of ventilator.
Fig. 2, a section through the working arrangements-half full size.
Fig. 3, plan-full size of ditto.
The ventilator is worked by means of a side motion with a connecting rod, c, to
take the spindle, d, of each shutter, b.
The top of the connecting rod, c, is fitted with a hook, l, which links into the top
of a spiral spring, e. This spiral spring, e, is fastened at bottom on to a hook, g,
fitted to casing; which spring keeps ventilator closed.
With the connecting rod, e, is attached wire spindles, d, d, d, which are fitted to
each shutter bb, b, and pass the whole length turning on bearing in casing.
The opening, setting and closing is performed by the lever, h, which takes a
fulcrumb on a hook f, fixed to casing, and passes through the slot in the face plate
into room with a ring on end for suspending the cord.
This lever h, is made with a fork end inside which catches under the ball shaped
part of connecting rod, c, and works from right to left.
When the lever, h, is pulled down (the shutters are open) it is drawn into the
1

page_text: slot on right hand side of face plate, and to close; pull the lever to the left and
release it from slot-the spiral spring closes.
The back is covered with wire gauze k.
The apparatus can be fixed at any height in a room and is worked from floor
level by a cord or wire suspended from lever.
Having now particularly described and ascertained, the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is
1st. Opening setting & closing a ventilator by means of vertical connecting rod,
spiral spring, and horizontal spindles with side motion.
Dated this 5th day of April 1893.
GEORGE HENRY BARTLETT.