Year: 1897

page_text: I, WILLIAM HENRY WAKFER, of No. 16, Hermitage Road, Green Lanes, in the
County of Middlesex, Engineer, do hereby declare the nature of this invention to
be as follows:-
My invention relates to sash fasteners whereby the sashes are locked in such
manner that it will be very difficult to open the window from the outside
and further under certain conditions the window may also be safely locked in a
more or less open position to admit of ventilation.
According to my invention I mount on one of the sashes a barrel or socket and
inside said barrel there is a bolt provided at one end with a wheel or handle and
at the other end with a cross piece so that the bolt has a T or L form. This
T bolt is made capable of turning round and of moving longitudinally in its
barrel or socket and it takes into a housing on the other sash. The T bolt may
be made with its ends to correspond or the ends may be made with differently
inclined surfaces in such manner that when in operation they cause the sashes to
shut as much as possible in the vertical direction as also to approach each other.
The housing is preferably formed of an elongated inverted U shape so as to admit
of the entry of the T bolt when the end of the latter is in a vertical direction
and when it has entered and passed through the housing it is impossible for the
window to be opened further than the distance equal to the amount of travel of
the T bolt in the vertical direction in the housing. When the bolt has been
entered in the housing it is given, say, a quarter of a turn in such manner that the
two ends of the T are then horizontal and consequently prevent the bolt from being
withdrawn. The housing may either be plain where the T bolt takes in the
locking position or it may be serrated so as to afford additional security. The bolt
may be locked either by making it screwed and providing it with a nut or there may
be a spring or its equivalent to retain the Ṭ end of the bolt in its proper position
against the housing and if desired the wheel or handle may have serrations wholly
or partly round same into one or more of which a sliding stop or the like may take.
Dated this Twenty-ninth day of April 1897
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.
COMPLETE SPECIFICATION.

page_text: in what manner the same is to be performed to be particularly described and ascer-
tained in and by the following statement:-
My invention relates to sash fasteners whereby the sashes are locked in such
manner that it will be very difficult to open the window from the outside
and further under certain conditions the window may also be safely locked in a
more or less open position to admit of ventilation.
Figure 1 of the accompanying sheet of drawings represents in front elevation
and on a small scale a window provided with a sash fastener constructed according
to my invention.
Figure 2 is a side elevation thereof partly in section.
Figure 3 is a similar sectional view to a larger scale showing the application of
the fastener.
Figure 4 is a front elevation thereof and
Figure 5 is a detail view of a part of the fastener.
As will be seen on referring to Figures 1, 2, 3 and 4 I mount on say the lower
sash a barrel or socket A, best seen in Figures 2 and 3, and inside said barrel A
there is a bolt B provided at one end with a wheel or handle B and at the other
end with a crosspiece B2 Figures 2, 3 and 4, or if desired instead of the cross-
piece B2 having a T form it may be in the form of an L. This T or L bolt is
made capable of turning round and of moving longitudinally in its barrel or
socket A and in the example shown the handle B' limits its motion to about a
quarter of a revolution so that when one end of the handle is touching the base plate
of the socket the cross piece B2 is vertical and when the other end of the handle
is touching the other side of the base plate the cross piece is horizontal. There
is a housing C fixed to the other sash and this housing is preferably formed of
an elongated inverted U shape so as to admit of the entry of the cross piece Bª
of the bolt B when the said cross piece is in its vertical position and when it
has been entered and pushed through the housing C it is impossible for the
window to be opened further than the distance equal to the amount of vertical
travel which can be given to the T bolt B in the housing. When the bolt B has
been entered and the cross piece Ba has passed through the housing C the bolt is
given say a quarter of a turn by means of the handle B¹ in such manner that the
cross piece B is then horizontal and consequently prevents the bolt from being
withdrawn.
The housing C may either be plain where the cross piece B2 of the bolt B takes
in the locking position or it may be serrated at C¹ as shown so as to afford addi-
tional security. The bolt may be locked either by making it screwed at 133 as
shown and providing it with a nut D with serrated or milled edges and if desired
it may have a sliding stop or the like to take into a slot or slots or in between two
or more of the serrations or there may be a spring or its equivalent instead of the
nut D to retain the cross piece B2 in its proper position against the housing.
The base plate A¹ of the barrel A which is fixed or in one with the said barrel
is turned up at A³ to form an abutment against which the housing C can take
when the bolt is screwed up to prevent the buckling or straining of the said
housing.
Generally it will be found sufficient if the sides of each end of the cross piece B³
are made to correspond but if advisable the ends may be made with differently
inclined surfaces in such manner that when in operation they cause the sashes to
shut as much as possible in the vertical direction as well as to approach each
other.
Figure 5 shows a housing made shorter than that shown in the other figures and
perhaps more applicable for dwelling houses, but where much ventilation is
required as in public buildings and the like a housing affording relatively greater
vertical travel to the bolt B will be found more suitable.
Having now particularly described and ascertained the nature of my said

page_text: invention and in what manner the same is to be performed I declare that what
I claim is:
1. A sash fastener consisting of a barrel attached to one sash having a bolt
adapted to slide and turn therein, said bolt being provided with an end of T
or form adapted to pass through a housing attached to the other sash and
means for locking said bolt in the housing substantially as shewn and described.
2. The construction of sash fastener shewn on the drawing.
Dated this Thirty-first day of Tanum 1000
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.