IMPROVEMENTS IN THE CONSTRUCTION AND MANUFACTURE OF WINDOW SASH FASTENERS
Year: 1877

page_text: LETTERS PATENT to David Barnett, of New Wandsworth, and William John
Earle Henley, of Anerley, both in the County of Surrey, for the Invention of
"IMPROVEMENTS IN THE CONSTRUCTION AND MANUFACTURE OF WINDOW SASH
FASTENERS."
Sealed the 25th June 1878, and dated the 31st December 1877.
PROVISIONAL SPECIFICATION left by the said David Barnett and William
John Earle Henley at the Office of the Commissioners of Patents on the 31st
December 1877.
DAVID BARNETT, of New Wandsworth, and WILLIAM JOHN EARLE HENLEY, of
Anerley, both in the County of Surrey. "IMPROVEMENTS IN THE CONSTRUCTION
AND MANUFACTURE OF WINDOW SASH FASTENERS."
This Invention consists of improvements in the construction and manufacture of
window sash fasteners, and the improvements have reference more especially to the
locking, closing, and fastening of window sash fasteners, whereby such fasteners
cannot by the insertion of any instrument between the sashes, be unlocked from the
outside of the window.
And in order that our said Invention may be properly understood, we will pro-
ceed to describe the same with reference to the annexed Drawings; the same letters
of reference indicate similar parts in all Figures.
We form the lever handle in two parts, B and D, and the part B we attach by a
spindle to the plate A. Attached to the said plate A is an ordinary spring, but
carried out and lapped round the back portion of the part B. This said spring keeps
the lever handle in position, both when locked and unlocked. The two parts B and
D we connect by means of a knuckle joint, as shown on Drawing, or any other
suitable form of swivel joint. At the outer end of part D we affix a projection D¹
to act as a stop.
On plate C we form a sloping semicircular tongue E, the shape and form of
which may however be varied to any design.

page_text: The handle B and D locks on to and passes over the tongue E dropping at the
end of the said tongue E into an aperture beneath it.
On the plate C we place a projecting stop F which has the effect of preventing
the handle being forced either way.
We further reserve to ourselves the right of making the handle B and D in one 5
part instead of in two, as described in the foregoing.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said David Barnett and William John Earle Henley in the Great Seal
Patent Office on the 29th June 1878.
DAVID BARNETT, of New Wandsworth, and WILLIAM JOHN EARLE HENLEY, of
Anerley, both in the County of Surrey. "IMPROVEMENTS IN THE CONSTRUCTION
AND MANUFACTURE OF WINDOW SASH FASTENERS."
This Invention consists of improvements in the construction and manufacture of
window sash fasteners, and the improvements have reference more especially to the
locking, closing, and fastening of window sash fasteners, whereby such fasteners
cannot by the insertion of any instrument between the sashes be unlocked from the
outside of the window.
And in order that our said Invention may be properly understood we will pro-
ceed to describe the same with reference to the annexed Drawings, the same letters
of reference indicate similar parts in all the Figures.
Fig. 1 represents a section showing the window fastened; Fig. 2 and 21 show
plan views.
Figs. 3, 4, and 5, sections of the plate C.
Fig. 6, view shewing plates A and lever handle B and D, and projection D¹.
Figs. 7, 8, 9, & 10, views showing means of jointing arms B and D.
Fig. 11, plan of plate A, showing spring and lever B.
We form the lever handle in two parts B and D, and the part B we attach by a
spindle to the plate A; attached to the said plate A is an ordinary spring but
carried out and lapped round the back portion of the part B. This said spring
keeps the lever handle in position, both when locked and unlocked.
As a modification of the arrangement to carry out and lap the spring round the
base or back portion of the arm "part B" we may in some cases make use of an
ordinary spring bent into a shape somewhat similar to the S spring, which modifi-
cation will have the same effect.
The two parts B and D we connect by means of a knuckle joint, as shown on
Drawings, Fig. 9, but we do not confine ourselves to this particular joint, as any
other suitable form of joint may be adopted.
We connect the two parts of the arm B and D by a box or shoe swivel joint,
as shown, Fig. 10, that is, the tongue of D is fitted into the shoe of B, and
then rivetted through or fixed by a pin, thus forming a box or shoe joint, the
principle being the same as that shown in Figs. 1 and 6, the shape of the shoe

page_text: differing, the sides instead of sloping, as in Figs. 1 and 6, being carried as shown
on Fig. 10. At the outer end of part D we affix a projection D¹ to act as a stop.
On plate C we form a sloping semicircular tongue E, the shape and form of which
may, however, be varied to any design.
The handle B and D locks on to and passes over the tongue E, dropping at the
end of the said tongue E into an aperture beneath it.
On the plate C we place a projecting stop F which has the effect of preventing
the handle being forced either way.
We further reserve to ourselves the right of making the handle B and D in one
part instead of in two, as described in the foregoing.
" part B"
Fig. 11 shews a modification of the arrangement of the spring, shewing the
the lever B and tail piece B¹, against which the spring acts; in this modifica-
tion we affix or cast to the left-hand base or back part of the arm
a projection or tail set at an angle to act as a lever. The spring then presses
against this tail, the effect of which is to keep the arm in its position when
the fastener is locked, thus bringing about the same result as herein-before
shewn when we use the lapping spring.
Having thus described the nature of our said Invention, and the manner in which
the same is or may be carried out, we would observe in conclusion that the locking
arrangement herein-before described can be applied to doors, French casements, and
such like purposes, but that what we claim and desire to be secured to us by the
herein-before in part recited Letters Patent is,-
First. The novel arrangement and combination of parts whereby window sash
fasteners cannot by the insertion of any instrument between the sashes be unlocked
from the outside of the window, substantially as herein-before described, and shewn
on Drawings, or any mere modification thereof.
Second. The peculiar arrangement of mechanism, as particularly shown on Figure 5,
for effectually locking the fastener, and as herein-before described.
Third. The combination and novel arrangement of joints for the purposes herein-
before set forth, or any mere modification thereof.
In witness whereof, I, the said David Barnett, on behalf of myself and the
said William John Earle Henley, have hereunto set my hand and seal, this
Twenty-ninth day of June, in the year of our Lord One thousand eight
hundred and seventy-eight.
DAVID BARNETT. (L.S.)