Year: 1894

page_text: Date of Application, 18th Dec., 1894
Complete Specification Left, 12th Mar., 1895-Accepted, 13th Apr., 1895
I FREDERICK JOHN BURRELL of St. Nicholas Works Thetford in the County
of Norfolk, Engineer do hereby declare the nature of this invention to be as
follows:-
The object of this invention is to effect an improvement in a type of sash
fastener commonly in use, in which an arm is hinged to the part fixed on the upper
sash and provided with a spring in the usual way. The said arm instead of
engaging with the cam shaped portion of the fixture on the lower sash as in the
fasteners commonly in use, is fitted with a cam or eccentric which is caused to
engage with the fixture upon the lower sash, by turning the knob or handle at the
erd of the arm in one direction. The effect of this is that the eccentric or cam
when turned draws the two fixtures towards each other and brings the sashes
tightly together so as to prevent all rattling, and the possibility of any instrument
being inserted between the sashes so as to act upon the arm, and takes up any
slackness due to shrinkage of the wood of which the sashes are made.
In order to give greater security the projection upon the lower sash against
which the cam or eccentric is pressed by turning the knob, may be indented so as
to make it impossible to turn the arm without first turning the knob or handle.
The end of the arm may be forked to provide for the eccentric, and the form of
the arm and the fixed projection on the lower sash may be varied as occasion may
require.
Dated this 17th day of December 1894.

page_text: fitted with an eccentric or cam F, which is caused to engage with the fixture or
catch D upon the lower sash, by turning the knob or handle G at the end of the
lever arm in one direction. The effect of this is that the eccentric or cam F when
turned in the direction indicated by the arrow, draws the two fixtures or plates B
and E towards each other, and brings the sashes tightly together so as to prevent
all rattling, and the possibility of any instrument being inserted between the
sashes so as to act upon the lever arm A, and takes up any slackness due to
shrinkage of the wood of which the sashes are made.
In order to give greater security the projection or catch D upon the lower sash
against which the eccentric or cam F is pressed by turning the knob G, may be
indented at X Fig. 2, so as to make it impossible to turn the lever arm A without
first turning the knob or handle G in the opposite direction to that indicated by
the arrow. The end of the lever arm may be forked as shewn in Fig. 1, to provide
for the eccentric or cam F and the form of the lever arm and the fixed projection
or catch D on the lower sash may be varied as occasion may require. Fig. 3,
shews the two positions of the cam F in full and dotted lines.
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 :-
1. In sash fasteners, the combination of the plate or fixture E with the cam
shaped portion of the catch D to engage with the cam F, and the lever arm A
pivoted to the plate B with a spring C and the handle or knob G, substantially as
herein described and according to the accompanying drawing.
2. In sash fasteners, the combination of the various parts substantially as
hereiubefore described in this Specification and illustrated in the accompanying
drawing.
J. P. BAYLY,
18, Fulham Place, W., Agent for the Applicant.