Improvements in and applicable to Hinged Doors or Shutters of the Kind used in connection with Ventilators.
Year: 1899

page_text: Date of Application, 20th May, 1899
Improvements in and applicable to Hinged Doors or Shutters of the
Kind used in connection with Ventilators.
AUGUSTUS MILLER BAILY, of Newark-on-Trent, Architect, and WILLIAM
CALDWELL, of 27, Sherwood Street, Nottingham, Ventilating Engineer, do hereby
declare the nature of this invention to be as follows;
-
This invention has reference to improvements in and applicable to hinged doors
or shutters used in connection with ventilators and known in the malting trade
as butterfly openers. The said improvements are also applicable to other
similar hinged structures.
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At the present time "butterfly" openers comprise two hinged doors or flaps,
and to the underside of each door or flap a link is pivotted, and the lower ends
of the two links are pivotted to each other. In this arrangement the doors or
flaps are opened by a direct push, one door or flap is often opened more than
the other, and the arrangement soon gets out of order.
.
The object of this invention is the provision of means whereby the doors or
flaps are compelled to open equally, and means whereby the doors or flaps may
be opened and closed at any distance from the same.
According to this invention the doors or flaps are hinged and provided with
pivotted links as in the present arrangement. The lower end of these links
are pivotted to each other and to a bar which is fitted to slide in guides carried
by the framework. To the upper end of the guide bar a cord or chain is attached
and by means of suitable pullies is guided to any convenient position from which
the doors may be opened and closed.
The number of doors, links, and guide bars may be varied, and the cord or
chain may be attached to the guide bars at any convenient position, and there
may be a system of pullies for reducing the power required for raising the doors.
Dated this 19th day of May 1899.
W. H. POTTER, M.I.M.E.,
Patent Agent, Brougham Chambers, Nottingham.
Improvements in and applicable to Hinged Doors and Shutters of the
Kind used in connection with Ventilators.
AUGUSTUS MILLER BAILY, of Newark-on-Trent, Architect, and WILLIAM
CALDWELL, of 27, Sherwood Street, Nottingham, Ventilating Engineer, do hereby
declare the nature of this invention and in what manner the same is to be per-
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037

page_text: formed, to be particularly described and ascertained in and by the following
statement:-
-
This invention has reference to improvements in and applicable to hinged doors
or shutters used in connection with ventilators and known in the malting trade
as butterfly" openers. The said improvements are also applicable to other
similar hinged structures.
"
At the present time butterfly". openers comprise two hinged doors or flaps,
and to the underside of each door or flap a link is pivotted, and the lower ends
of the two links are pivotted to each other. In this arrangement the doors or
Haps are opened by a direct push, one door or flap is often opened more than
the other, and the arrangement soon gets out of order.
The object of this invention is the provision of means whereby the doors or
flaps are compelled to open equally and-means whereby the doors or flaps may
be opened and closed at any distance from the same..
According to this invention the doors are hinged and provided with
pivotted links as in the present arrangement. The lower end of these links are
pivotted to a cross head on the end of a bar which is fitted to slide in guides carried
by the framework. To the upper end of the guide bar a cord or chain is attached
and by means of suitable púllies is guided to any convenient position from which
the doors may be opened and closed.
The number of doors, links, and guide bars may be varied, and the cord or
chain may be attached to the guide bar at any convenient position, and there
may be a system of pullies for reducing the power required to raise the doors..
In the drawing which accompanies this specification there is shown in sectional
elevation the application of this invention to “butterfly" doors or openers as used
in the malting trade:
The doors and at the top of the kiln are hinged at their outer ends on
fixed rods c and d, and at their inner ends are fitted with pivotted bars c-and f,
these parts being fitted together and fixed in position similarly to butterfly openers
of ordinary construction. According to this invention the lower end of the
bars and instead of being pivotted to each other, are pivotted to a cross
head or piece y. which is placed between the two bars and at its centre is rigidly
connected to a guide rod h. This rod passes through a hole in a cross bar
and another hole in a bracket which is fastened to the bar k. The upper end
of the rod h is connected to a chain or other flexible connection which is passe
over guide pullies and brought to a position where it can be conveniently operated
by the workman for opening and closing the doors.
When the doors are large and heavy there may be a system of pullies or a
winch, or the doors may be divided and operated by the same or independent
chains.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same may be performed we declare that what
we claim is:-
The combination with doors or openers of the kind herein referred to, of a
cross head between the hinged bars under the doors, a central rod attached to
such crosshead, guides for the rod, and a chain or its equivalent attached thereto,
constructed, combined and operating as herein described and for the purpose set
forth.