Improved Apparatus for Opening, Closing, Securing, and Adjusting Fanlights, Skylights, and Swing Sashes, Applicable also to Swing Mirrors.
Year: 1890

page_text: Date of Application, 5th May, 1890-Accepted, 26th June, 1890
COMPLETE SPECIFICATIOA.
Improved Apparatus for Opening, Closing, Securing, and Adjusting
Fanlights, Skylights, and Swing Sashes, Applicable also to Swing
Mirrors.
I DAVID OSBORN of Berkhamsted in the County of Hertfordshire Builder 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:
The object of this invention is to provide a simple means whereby fanlights skylights
swivel sashes and the like may be opene. closed held in any intermediate position and
secured when shut or open and by which swing mirrors may also be held at any
desired angle.
According to this invention I attach to the window frame a plate or bracket to
which is attached one end of a toggle joint lever the other end of the lever being
attached to a plate lot into the sash.
The frame end of the lever terminates in or has attached thereto or to the pivot
thereof a toothed quadrant or sector the teeth of which engage with a worm revolving
in bearings carried by the bracket or plate first mentioned, attached to the worm is n
pulley or cog wheel operated by either a cord, or rack rod respectively.
And in order that my said invention may be the better understood I will proceed
to explain the same with reference to the accompanying sheet of drawings in
which
Figure 1 represents side elevation of an apparatus constructed according to my
present invention.
Figure 2 section of same shewing fanlight open.
Figure 3 front elevation of same apparatus but operated by a rack rod instead of
cord and pulley.
Figure 4 elevation of fixing plate on light.
a a is the toggle joint lever binged at the end a of the toggle terminates in or
has attached thereto the quadrant c. hinged at d to the bracket or plate e. secured to
the window frame by any suitable means the end of the toggle a¹ is hinged at ƒ. to the
plate g. secured to the sash by any suitable means screws for instance.
h. is the worm revolving in bearing which worm engages with the
quadrant c.
7. is a pulley attached to the worm h. over which passes an endless cord m. n is a
plate to carry outer end of the worin shaft.
On pulling the cord m. the pulley and worm are rotated thereby causing the toggle
to assume the positions shewn in Figures 1 & 2 or any other position intermediate
thereto. Owing to the worm gearing employed the apparatus above described holds
the window sash or fanlight securely in any position no other locking apparatus or
fastener being required. Figure 3 shews front elevation of same apparatus but the
worm is rotated by the rack rod . and spur wheel y. instead of a cord and pulley.
For adapting this invention to swing mirrors the pulley is preferably replaced by a
milled head or thumb screw the apparatus being fitted as shewn at Figure 2.
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 :-
I. In an apparatus for opening closing and securing fanlights skylights and the
like the combination of a togglo joint lever with a toothed sector operated by a worm

page_text: II. In an apparatus for opening closing and securing fanlights skylights and the
like the combination with a toggle joint operated by a worm and sector and cord and
pulley substantially as described for the purpose stated.
LLI. In an apparatus for opening closing and securing fanlights skylights and the
like the combination with a toggle joint operated by a worm and sector of a rack rod
and spur wheel substantially as described for the purpose stated.
BROWNE & Co.,
59 & 60, Chancery Lane, Agents for Applicant.