IMPROVE- MENTS IN OR RELATING TO THE OPENING AND CLOSING OF SASH WINDOWS OF ANY DESCRIPTION
Year: 1885

page_text: COMPLETE SPECIFICATION.
I HORATIO WALTER IBBOTSON of 23, Change Alley Sheffield in the County of
York Gentleman do hereby declare the nature of my invention for "IMPROVE-
MENTS IN OR RELATING TO THE OPENING AND CLOSING OF SASH WINDOWS OF
ANY DESCRIPTION" and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement:-
My Invention relates to and claims to be an improved method. of checking or
locking at any point or position where required, Sash Windows, where an outside
handle worked by hand is employed to move such Windows by leverage, and this
whether such Sashes be moved up and down by means of Cords or by means of
toothed Racks or by a spring or springs.
A method commonly adopted for the above purpose, is to employ a sliding bolt,
which is moved by band, and slides into any of the spaces of a Cog wheel attached
outside to the handle, which wheel is toothed or grooved for the purpose of
receiving such bolt-By my present method, I obtain a Check such as is self
acting, and which requires therefore no operation by hand in connection with
same.
To effect my object, I attach to a sliding bolt, a small spiral spring, which keeps
out the bolt, except when the same is pressed back, and on a small Cog wheel, I
make or leave, grooves or spaces into which the bolt moves. The end of the bolt
which moves into the spaces of the wheel, is made tapered or partly round at the
end next the wheel, and the grooves or spaces in the wheel, are tapered or rounded
accordingly at the edges of same, and by this means, on the turning of the handle
either to the right or to the left, the bolt is thereby pushed back, or alternately
prevented from acting as a check, until the handle is stationary again.
I usually affix such bolt and grooved wheel to the outside of the window frame,
but the same can be adapted so as to be fixed and worked out of sight from the
inside, and I do not confine myself to the number or depth or width of the grooves
or spaces in the wheel, nor to the size or strength of the spring or other parts of
the Check, which vary or may vary according to the kind or variety of window
sash in use.
The accompanying Drawings illustrate the chief features of my Invention,
Figure 1. shews the Check in operation.
Figure 2. shews the Check pushed back.
Like letters of reference where such letters appear, indicate corresponding parts
in the Drawings.
In such Drawings, the Bolt A is pushed forward by the spiral spring B, the

page_text: The Handle-wheel or Cog-wheel D, is grooved as shewn at D¹ to receive the
Bolt, which is tapered correspondingly at A.
To allow the back movement of the Bolt on being pushed back by the Cog-
wheel D, operated upon by it's Handle, a hole is made at the point E to enable
Buch Bolt to be moved back.
·
Having now particularly described and ascertained the nature of my said
.Invention and in what manner the same is to be performed, I declare that what
I claim is
In connection with the opening and closing of Railway or other Carriage
Windows, or for Sash Windows for Houses or other Buildings, where the
employment of a Check or lock to arrest at any point the progress of such Sashes
up or down is required, or wherever in such cases a moveable bolt whether acting
against a grooved Cog-wheel or other appliance is required or employed, a new
method, as above described, of employing affixing or attaching a spring Check
with tapered bolt end, and corresponding wheel grooves or spaces to receive such
bolt, whereby a self acting Check is provided for the above purpose.