AN IMPROVED WINDOW FASTENER
Year: 1884

page_text: I SAMUEL WILLETT, 4 Commercial Place, Herne Hill in the County of Surrey,
Oilman do hereby declare the nature of the said Invention for "AN IMPROVED
WINDOW FASTENER" to be as follows:-
My Invention relates to an improvement in sash fasteners and has for its object
to secure the bolt or latch in its locked position and prevent it being unfastened
from the outside.
The Invention consists essentially in a spring locking plate adapted to engage
with the pivoted bolt or latch and retain it in the locked position this locking
plate being so situated as to be practically inaccessible to any instrument inserted
between the meeting rails of the sashes.
In order that the Invention may be more readily understood I have illustrated
it in the accompanying Drawings and will proceed to describe it with reference
thereto. Figure 1 is a front view of the fastening. Figure 2 a plan. Figure 3 a
cross section on line 1-1 Figure 2 and Figure 3 a section on line 2-2 Figure 2 of
the catch plate showing the locking device of my Invention.
The same letters of reference indicate the same parts in all the Figures. A is
the ordinary pivoted locking bolt or latch and B is the ordinary quadrant shaped
guard which instead of being fixed upon a plain plate as usual is fixed upon a
box C whose top is formed of a plate D pivoted at one end d in the sides of the
box and pressed upwards by a spring di beneath it. E is a snug cast or fixed
upon the plate D and situated partly beneath the quadrant guard B and inclined
at one end so as when struck by the bolt A in drawing the latter forward the
plate D and snug E will be depressed as shown in dotted lines in Figure 4 thereby
permitting the bolt A to pass, the snug springing up behind the bolt and securely
locking it between the guard B and the snug E as shown in Figure 1. The
plate D passes beneath the guard B and projects beyond it to enable it to be
readily depressed when required to release the fastener. For greater security
a safety pin F may be inserted beneath the plate D to prevent it being depressed
from outside.
The bolt A may be of the ordinary kind bat in the Drawing it is shown as
fixed to the arbor of a spring barrel whereby it is thrown completely back directly
it is released from the locking snug E and is prevented from being carelessly
allowed to occupy an intermediate position.
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201
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CT
1001

page_text: 1
I SAMUEL WILLETT, 4 Commercial Place, Herne Hill in the County of Surrey,
Oilman, do hereby declare the nature of my Invention for "AN IMPROVED
WINDOW FASTENER" 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 an improvement in sash fasteners and has for its object
to secure the bolt or latch in its locked position and prevent it being unfastened
from the outside.
The Invention consists essentially in a spring locking plate adapted to engage
with the pivoted bolt or latch and retain it in the locked position this locking
plate being so situated as to be practically inaccessible to any instrument inserted
between the meeting rails of the sashes.
In order that the Invention may be more readily understood I have illustrated
it in the accompanying Drawings and will proceed to describe it with reference
thereto. Figure 1 is a front view of the fastening... Figure 2 a plan. Figure 3 is
an end view and Figure 4 a section on line 1-1 Figure 2 of the catch plate
showing the locking device of my Invention.
The same letters of reference indicate the same parts in all the Figures. a is
the ordinary pivoted locking bolt or latch and b is the quadrant shaped guard or
* catch which is fixed upon or cast in one with cheeks c forming an open box rising
from the base plate d. The top of this box is formed of a plate e fitted to work
between the cheeks c on a horizontal pivot fat one end the ends of the pivot
being supported in the cheeks c. This plate e is pressed upwards by a spring g
fixed beneath it to the plate d, and its upper surface has an inclined snug / cast
upon it. This snug is situated beneath the quadrant guard b and stands up in the
path of the bolt a so that when the latter is drawn forward it will on meeting
the inclined surface of the snug, cause the plate e to be depressed between the
sides c as shown in dotted lines in Figure 4. After being depressed to permit
the bolt to pass, the snug springs up behind the bolt and securely retains it in the
locked position.
The free end of the plate e passes into a cavity beneath the rear end of the
guard b and has affixed to it a pin or stud i which projects through a slot k at
the front whereby the plate e and snug h may be readily depressed when required
to release the bolt. The snug being situated beneath the quadrant catch b, and
the pin projecting at the front they cannot be acted on by any instrument
which could be inserted between the meeting rails A B of the window sashes to
which the fastener is applied.
For greater security the pin or stud i may be made to act as a safety device
whereby the plates will be locked in the raised position so as to make it impossible
to depress it from the outside.
This contrivance is shown in the detail view Figure 5 and consists in fitting a
collar on the pin i, said collar being provided with a lug or bit which when
turned downward as shown in one view rests on the base plate d and prevents
the spring catch plate e being depressed, whilst when turned sideways it offers no
obstruction to the depression of the said plate and the release of the bolt, or in
lieu of the lug or bit 1, a heart shaped locking device may be used, as shown
in Figure 6.
The bolt a may be of the ordinary kind but in the Drawing it is shown as
fixed to the arbor of a spring barrel whereby it is thrown completely back to
the dotted position shown in Figure 1 directly it is released from the locking

page_text: snug g and is prevented from being carelessly allowed to occupy an intermediate
position.
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 :-
1 In a window fastener, the combination with the pivoted bolt or latch and
with the quadrant catch of a spring plate having a snug adapted to engage with
and retain the bolt or latch when in the locked position substantially as shown
and described.
2nd In a window fastener a catch plate constructed with rising cheeks and with
a spring plate pivoted between the same at one end and provided with a snug
extending beneath the quadrant catch in position to engage with the latch bolt,
and provided with a projection at its free end whereby it may be depressed to
release the bolt substantially as shown and described.