IMPROVEMENTS IN APPARATUS FOR SECURING OR FASTENING WINDOW SABHES, AND AN IMPROVED BOLT APPLICABLE TO SASH FASTENERS OF ALL KINDS
Year: 1869

page_text: PROVISIONAL SPECIFICATION left by George Henry Wilson and
George Edward Pullen at the Office of the Commissioners of
Patents, with their Petition, on the 1st April 1869.
We, GEORGE HENRY WILSON and GEORGE EDWARD PULLEN, of
Commercial Road, in the County of Middlesex, do hereby declare
the nature of the said Invention for "IMPROVEMENTS IN APPARATUS FOR
SECURING OR FASTENING WINDOW SABHES, AND AN IMPROVED BOLT APPLICABLE TO
SASH FASTENERS OF ALL KINDS," to be as follows:-
The chief objects of our Invention are to provide means for adjusting
window sashes, that is to say, to secure them whether open or shut, and
to secure the levers and bolts in position when locked. Our apparatus
is constructed for placing on either end of top bar of front or lower sash.
It consists of two racks, a box, with two bolts which take into these
racks, a locking spring, an adjusting spring, a lever or arm, and a drop
bolt.
The mechanism is hereafter described. The bolt for securing the
upper sash is curved, and when locked takes into a rack on the upper
sash; it works on a pin or stud which is fixed in the bottom inside the

page_text: DOX. The bolt for securing the lower sash 18 planted over the curved
bolt and parallel with the top bar, and when locked takes into the other
rack on the pulley style. The locking spring is placed on the side
inside the box to secure the lever or arm in its required position when
the sashes are fixed. The lever or arm with a stud thereon is
employed to drive the bolts into or draw them out of the racks. The
drop bolt is employed to secure the arm and bolts when the sashes
are fixed. The adjusting spring is to prevent the bolts shaking or
getting out of position, and to give them an adjusting and self-locking
action.
The position and mechanism are as follows:-The lower sash bolt is
planted parallel to the top bar and is operated by a pin or stud on the
lever which works in a slot in the end of this bolt. The lever or arm
is provided with a knob or bolt for moving it. The bolt for securing
the upper sash is curved and is operated by a pin on the other bolt
working therein. As the pivoted arm is moved forward the pin thereon
pushes the bolt of the lower sash outwards, and this bolt in its move-
ment pushes out the bent bolt; the bolt of the lower sashes takes into
notches, or a rack in the pulley box, or in the side of the window frame,
and the bolt of the upper sash takes into notches or a rack in the
upper sash. The bolts secure both sashes whether both are closed or
one or both more or less open. On moving back the pivoted arm the bolts
are withdrawn from the notches or racks. To secure the pivoted arm
in its forward position we pivot it at its back end to a spring, and make
a notch or catch in the top plate of a box which contains the bolts.
As the arm is moved forward a pin thereon, or the shank of its knob,
bears against a curve on the top plate leading up to the notch, thereby
stretching the spring, but when the notch is reached the pin or the
shank takes therein allowing the spring to resume its normal position,
and thereby holding the arm. To prevent the spring being over
stretched we carry the pin of the pivot through a slot in the bottom
plate of the box. This mode of securing the pivoted arm applies to
sash fastenings placed in the ordinary position; the arm would in this
case be pivoted to a spring on the upper sash and would be moved
forward under a notched curved bar on the lower sash. For greater
security we sometimes pass a screw through the top plate or curved bar
to take into a branch of the pivoted arm when this arm is moved forward.
The outer end of the pivoted arm is made to carry a drop bolt, which

page_text: is held in place as in a socket. The bolt is kept in place by a pin which
passes through the socket. There is a hole in the bottom plate into
which the bolt drops when the fastening bolts are in position for
holding the frames secure; this drop bolt is applicable to sash fasteners
5 of all kinds.