Improved Sash Fastener.
Year: 1893

page_text: Date of Application, 24th Mar., 1893
Complete Specification Left, 23rd Dec., 1893-Accepted, 27th Jan., 1891
PROVISIONAL
Improved Sash Fastener.
I, RICHARD HURRELL FROUDE, of The Keep, Dartmouth, Devonshire,
Gentleman, do hereby declare the nature of this invention to be as follows:-
My invention relates to an improved construction of sash fastener which closes
automatically on closing the window. For this purpose 1 fix to the bar of the
outer sash a plate, to eyes on which is pivotted a loop shaped bar that can turn
inwards over the bar of the inner sash and on the latter I fix a plate on which is
formed or fixed an upright cam shaped projection of such a form relatively to the
looped bar and its pivot, that on turning the bar down its loop will pass over the
cam and bear with its inner end surface against the curved surface of the cam, so
that as such surface is made with a certain amount of excentricity relatively to the
centre of the pivot of the looped bar, this in being drawn down by hand over the
will effect the tightening together of the two sashes.
cam,
The plate carrying the cam is made to project beyond the inner sash bar and
close up to the eyes to which the looped bar is pivotted, so that on slightly
loosening the looped bar from the cam and then pushing up the inner sash, the said
projection of the plate in rising will come in contact with the underside of the
looped bar close to the pivot, and will consequently cause the looped bar to turn
back on its pivot out of the way of the inuer sash.
The looped bar has, close to its pivot a spur or finger so placed as in turning
with the bar to project inward underneath the plate of the inner sash, so that when
this is closed down again it will strike against such spur or finger and will thereby
effect the turning forward again of the looped bar so as to engage automatically
with the cam, requiring only the pressure of the hand to tighten the fastening.
The looped bar is provided with a stop at the side opposite the finger, which
prevents the bar from being turned back beyond the before mentioned position in
which the plate of the inner sash can strike against the spur of the looped bar on
closing.
Dated this 24th day of March 1893.
ABEL & IMRAY,
Agents for the Applicant.
Improved Sash Fastener.
1, RICHARD Hurrell FROUDE, of The Keep, Dartmouth in the County of
Devon, Civil Engineer, do hereby declare the nature of this invention 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 improved construction of sash fastener which closes
automatically upon closing the window.
I will describe the invention with the aid of the accompanying sheet of drawings
upon which similar letters of reference on the various figures relate to similar parts.
Figs. 1, 2, & 3, are a plan view, a side view, and a sectional view of a sash
fastener constructed according to my invention in a simple form.
Fig. 3 is an end view of the portion of sash fastener which is fixed to the inner
or lower sash.

page_text: Fig. 6 a side view of another modification.
Figs. 7 & 8 a plan and a side view of another form in which I construct my
invention.
Fig. 9 is a modification applicable to the character of fastener illustrated in
Figs. 1, 2, 3, 7 & 8.
'
And Figs. 10, 11 & 12 plan, side, and sectional views of a modification of
Figs. 7 & 8.
Referring firstly to Figs. 1, 2, 3 & 3^,
I fix to the bar (A) of the outer sash a plate (B) to which is pivotted at (B') a
loop shaped bar (C) that can turn inwards over the bar (D) of the inner sash and
on this bar (D) I fix a plate (E) on which is formed or fixed an upright cam shaped
projection (F) which is of such a form relatively to the looped bar (C) and its
pivot (B) that on turning the bar (C) down, its loop (C) will pass over the cam (F)
and bear against the curved surface (F¹) of the cam (F), so that as such surface
is made with a certain amount of excentricity relatively to the centre of the
pivot (B) of the looped bar (C) this looped bar (C) in being drawn down by hand
over the cam (F) will effect the tightening together of the two sashes.
If desired a double cam as in Fig 7 may be used.
The shoulder (G) on the cam (F) is for the purpose of preventing the looped bar
fastener (C) becoming detached if the shaking of a badly fitting sash should cause
the loop (C) to ride up the curved edge (F).
The plate (E) carrying the cam (E) is made to project beyond the inner sash bar
at (E) and the looped bar (C) has close to its pivot a spur or finger (H) so placed
that when the window is open and the bar (C) is turned back the finger (H) pro-
jects inward underneath the projection (E) of the plate (E) on the inner sash so
that when this sash is closed down again the projection (E) will strike against the
spur or finger (H) and will thereby effect the turning forward again of the looped
bar (C) so as to engage automatically with the cam (F) requiring only the pressure
of the hand to tighten the fastening. The looped bar (C) is provided with a stop
'at (1) at the back opposite the finger (H), which prevents the bar (C) from being
turned back beyond the position shewn in dotted lines Fig. 2, and in the section
Fig. 3.
Figs. 4 & 5 illustrate a modification in which the upper part of the cam (F) is
divided into two parts so as to allow of pivotting between them the small piece (J)
which is made so as to balance in the position shewn in Fig. 5, the arm (J') pro-
jecting so that when the loop (C) is passed down over the cam (F) to close the
.fastening it, will come in contact with the arm (J¹) of the pivotted piece (J) and
push it into the position shewn in dotted lines when passing it. The pivotted
piece (J) will then swing back into the position shewn in full line and in order to
allow the loop (C) to pass it again in releasing the fastening the arm (J¹) will
have to be pressed down by the finger of the operator.
In Fig. 6a pivotted catch (K) is attached to the end of the loop piece (C) so
that when the loop piece is brought over the cam (F) as shewn, the catch (K) will
engage in the notched out portion (F³) of the cam (F) and prevent the loop being
raised without first releasing the catch, (K) by pressure on the arm (K¹). When
the loop piece is thrown back it and the catch (K) will assume the position shewn
in dotted lines. The fastening of the sashes is effected as in the other cases by the
impingement of the loop (C) against the edges of the cam piece (F), the catch (K)
only acting as an additional security.
Figs. 7 & 8 illustrate a modification of my invention in which in place of the
loop piece (C) a bar (L) is used passing between two cams (F2) and having a
head (L) hearing against the edges of the cams (F2). If desired only a single cam
may be used.
Fig. 9 shews a mode in which a spring piece (M) may be used in place of or in
conjunction with the cam (F) or with the double cams (F2). The head (M¹) of
the spring (M) being so formed that when the loop piece (C) or bar (L), as the

page_text: case may be, is drawn down it will press it back and pass over it. It will then be
necessary to press back the spring catch (M) as shewn in dotted lines in order to.
release the fastening when opening the sash.
Figs. 10, 11, & 12 shew an arrangement for making the fastener more entirely
thief proof. In addition to the bar (L) with head (L') I have the pivotted.
cranked piece (N) weighted so as to lie in the position shewn in Figs. 11 and 12
A portion (L) of the head (L') is cut out thereof so as to receive the upright arm.
of the cranked piece (N). The edge (L³) of the bar head (L') is bevelled so that
when it is brought down it strikes against the pins or projections (P) on the cranked.
piece (N) throwing the cranked piece into the position shewn in dotted lines in
Fig. 12 and thus enabling the bar to pass into the position shewn in Fig. 11, the
parts then become locked together until to release them the cranked piece (N) is.
tilted forward by the operator and the bar (L) raised.
The lower arm of the crank piece (N) may be so formed that the fastening bar
when falling strikes this arm & causes the crank piece to tilt and the upper arm.
to lock into the bar.
In Figs. 11 & 12 the finger piece (H) is shewn pivotted so as to allow of greater
freedom of action with regard to the sash fastener, and this pivotted finger piece
may be used in any of the before named descriptions of fasteners, when it will not.
be necessary to form the bottom plate (E) raised as shewn in Fig. 3A, as the
pivotted finger will lie above the plate as shewn in Fig. 12; the action of raising
the lower or lowering the upper sash, causing the pivotted finger to tilt as shewn in
dotted lines Fig. 12, without disturbing the bar fastener (L), but the action of
bringing the sashes together again causes the projecting portion (E¹) of the plate (E).
to strike the projecting face of the pivotted finger (H), and its back face coming in.
contact with the pivotted bar fastener (L) will cause it to fall over the cams as shewn.
in Fig. 11.
I do not confine myself to the exact combinations of the parts in the various
alternative arrangements as illustrated, as they may in various instances be inter-
changed without altering the nature of the invention.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is;
1. In an automatically acting sash fastener the combination of a pivotted loop
shaped bar & cam shaped catch or catches constructed & working substantially as
described & shewn.
2. In an automatically acting sash fastener the combination of a headed pivotted
bar & a double or single cam shaped catch substantially as described and shewn.
3. The combination of any of the pivotted catches (J) (K) or (N) or their equiva-
lents with the automatically acting sash fasteners as described.
4. The combination of a cam shaped catch and a pivotted loop shaped bar or
headed bar fastener with a pivotted spur or finger for the purpose of causing the.
bringing of the sashes together to act on the fastener as described.
Dated this 22nd day of December 1893.
HENRY F. TALBOT,
7, Cherry Street, Birmingham, Agent for the Applicant..