Improvements in Apparatus for Preventing the Vibration or Rattling of Sliding Windows.
Year: 1892

page_text: Date of Application, 15th June, 1892-Accepted, 30th July, 1892
COMPLETE SPECIFICATION.
Improvements in Apparatus for Preventing the Vibration or Rattling
of Sliding Windows.
We, CHARLES HIGGIN MAXSTED, of Westholme, Lancaster, in the County of
Lancaster, Silk Spinner, and ANTHONY BELL, of 36 Derwent Road, in the same
town, Ironmonger, 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 has for its object improvements in apparatus for preventing the
vibration or rattling of sliding windows. In carrying out our invention we employ
a disc (preferably of metal) flat on one side but on the other side tapered off or
sloping downwardly from the centre so as to form a kind of circular wedge which is
held in the required position within a cover or pocket fastened to the window sash
the arrangement being such that the circular wedge of its own gravity falls or
moves sidewise into or between the sash and its guide frame and so takes up any
slack between them.
In order that our said invention may be the better understood we refer to the
accompanying sheet of drawings in which
Fig. 1 shews (in front view) our improved apparatus applied to the left hand side
of a sliding window sash;
Fig. 2 is a sectional side view of the same; and
Fig. 3 is a sectional plan view of the left hand side portion of an ordinary
arrangement of sliding window sashes showing the application of our improved
apparatus thereto.
Fig. 4 is another sectional plan view drawn to a larger scale for the purpose of
illustrating more clearly the leading features of our invention.
We apply our improved apparatus to the right and left hand side of the window
sash as shewn at Figs. 5 and 7 (the said apparatus being constructed "right and
left handed" as will be well understood) the apparatus being fixed to the inside of
the lower sash and to the outside of the upper sash as shewn at Figs. 3, 6, and 8.
a is the circular wedge capable of moving freely within the cover or pocket b
fastened by means of screws to the sash rail c. d is the usual projecting rib on the
guide frame e. The interior of the cover or pocket 6 is inclined downwardly (see
broken lines at Fig. 1) so that the circular wedge a has a tendency to roll down
the inclined part and thus when the window sash is shaken or vibrated to insert
itself further and further into the space between the sash rail c and the rib d. The
upper sash of the window and the lower sash g being each provided with the
improved apparatus are thus caused to be tightened up against each other at
the part and thus not only is rattling between the two sashes prevented but also
the draught caused by the inlet of the outer cold air between the two sashes which
would otherwise obtain.
In some cases one pair of the apparatus to each sash as shewn at Figs. 5 and 6
will answer the intended purpose but for large window sashes two pairs may be
satisfactorily applied as shewn at Figs. 7 and 8.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed we declare that what
we claim is :-
The improved apparatus for preventing the vibration or rattling of sliding
windows consisting of a circular wedge piece such as a enclosed within an internally

page_text: inclined cover or pocket such as 6 the said parts being arranged to operate substan-
tially as herein before described and shewn in the accompanying drawings.
Dated this '15th day of June 1892.
W. LLOYD WISE,
Per F. J. Brougham,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicants.