Improvements in Apparatus for Opening and Closing Casements, Skylights, Ventilators, and the like.
Year: 1889

page_text: Date of Application, 9th Feb., 1889
Complete Specification Left, 8th Nov., 1889-Accepted, 14th Jec., 1839
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Opening and Closing Casements,
Skylights, Ventilators, and the like.
L, ROBERT LIVINGSTON of 136 Nelson Street, Tradeston, Glasgow, in the County of
Lanark, Brassfounder, do hereby declare the nature of this Invention to be as
follows:-
This Invention relates to apparatus for opening and closing casements, skylights,
ventilators and the like and the improved apparatus consists of a screw one end of
which is secured to or near the casement or ventilator framing whilst its other end
passes through a nut which is contained within the boss of a pulley carried in a
bracket secured to the sash of the moving casement, ventilator or skylight. The
boss of the pulley constitutes a ball socket for the nut which is retained in position by
two screws or pins in such a way that the nut is free to move through an arc. Round
the pulley an endless cord is passed the said cord being also conducted over guide
pulleys which may be centred in the bracket carrying the main pulley or in a separate
bracket. By actitating the cord the main pulley is through the nut caused to travel
on the screw and so open or close the casement, light or casement.
Dated this Eighth day of February 1889.
CRUIKSHANK & FAIRWEATHER,
62, Saint Vincent Street, Glasgow, Agents.
COMPLETE SPECIFICATION.
Improvements in Apparatus for Opening and Closing Casements,
Skylights, Ventilators, and the like.
L, ROBERT LIVINGSTON of 136 Nelson Street, Tradeston, Glasgow, in the County of
Lanark, Brassfounder, 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 to apparatus for opening and closing casements, skylights,
ventilators and the like and the improved apparatus, which is illustrated as applied to
a casement or ventilator in vertical section at figure 1 and in front elevation at
figure 2 of the annexed drawings, consists of a screw a one end of which is jointed
to the window framing in such manner as to be capable of moving through an are
vertically whilst its other end passes through a nut c which, as seen more particularly
by the detaile vertical section and end elevation at figures 3 and 4, is contained
within the boss of a pulley d carried in a bracket e secured to the frame of the moving
casement or ventilator. The pulley is made in two parts screwed together and its
boss constitutes a ball socket for the nut c which is retaine in position by two tail
pieces or pins g forined on or fixed in the nut and which enter recesses made in each
half of the pulley in such a way that the nut is free to move through an are in the
direction of the arrow figure 3. Round the pulley an endless cord h is passed the
said cord being also conducted over guide pulleys which may be centred on
the window framing or on the bracket carrying the main pulley d. By actuating
the cord the screw a is caused to travel through the nute and so open or close the
ventilator, light or casement.
Figure 5 illustrates in vertical section the adaptation of the Invention to a skylight.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, 1 declare that what I
claim is
In apparatus of the class set forth the combination of a screw a nut and pulley d
situated thereon the nut being capable of movement through an are at right angles
to its plane of rotation with the pulley as described.
Dated this Savonth day of November 1889.
CRUIKSHANK & FAIRWEATHER,
62, Saint Vincent Street, Glasgow, Agents.