Improvements relating to Roofs of Horticultural and other Buildings.
Year: 1892

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COMPLETE SPECIFICATION.
Improvements relating to Roofs of Horticultural and other
Buildings.
I, HORACE JOHN PULLEN-BURRY, of Brookland, Sompting, Sussex, Market
Gardener, 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 :-
This invention relates chiefly to horticultural glass houses and it consists in
certain improvements applied to the hinged lights or frames which are arranged in
the roof near the ridge for ventilating or other purposes.
Heretofore these frames have been provided with various means for opening
them and keeping them open but when released they close and are held closed
by their own weight. According to the present invention however these frames are
counterbalanced by weights in such a manner that they tend always to open and
remain open and means are provided for shutting them and retaining them in the
ir closed position when desired.
By this system of counterbalancing in which the weight is but slightly heavier
than the sash the closing of the frame requires but a slight force so that it is
possible to connect or combine together several closing contrivances so that all the
frames may be closed by one movement of the attendant or released and allowed
to open in the same manner.
In the annexed drawing
Fig. 1 is a vertical cross section of the roof of a glass-house showing so much
of the same as may be necessary to illustrate the present invention.
Fig. 2 is a plan view thereof."
A is the ridge pole, B B the rafters of the roof and C is the frame or light
hinged at to the ridge pole and intended to open by being lifted outwards as
shown in Fig. 1 as in other frames intended for ventilation.
To effect this opening the bars DD are provided having any suitable
weights EE near their outer ends. There may be two such bars and weights to
each hinged frame or only one provided that their weight is such with regard to
the weight of the frame that the latter is always opened by the superior weight
on the arms D D when not retained by the cord or wire F. The arm or arms D is
or are made curved as shown to pass clear over the ridge pole and from that point
forward may extend in the same plane as the frame C or may curve downward so
long as they remain clear of the roof when the frame is open. The wire F passes
around the pulley G and if desired around another pulley before being attached
at its end to a rod or wire H of convenient length. This rod H slides in eyes J
and to it is attached the wire F of each of the hinged frames. At the end of the
rod H is a handle for moving the rod. By pulling the rod the wires F are all
drawn thus closing the hinged frames. The rod H may be secured in its place.
When it is released and allowed to return to its first position it allows all the
counterbalanced frames to open.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed 1 declare that what I
claim is
In a roofed horticultural house or other roof the combination with the hinged
frames of the roof of extended arms provided with counterbalance weights
whereby the frames tend to open and remain open, and a longitudinally movable rod

page_text: or wire to which all the wires or equivalents for closing the said frames are
attached for simultaneous control of the frames substantially as described.
Dated this 31st day of August 1892.
HERBERT & Co.,
18, Buckingham Street, Strand, London, W.C., Agents for the Applicant.