Machine for Recessing and Mortising Window Stiles.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
A Machine for Recessing and Mortising Window Stiles.
I, NOEL NEWALL HAIGH, Managing Director of W B. Haigh and Co., Limited,
of Globe Iron Works, Oldham, in the County of Lancaster, Saw Mill Engineers,
do hereby declare the nature of this invention to be as follows:--
This invention relates to the construction of a machine for recessing and
mortising the stiles of sash windows to receive the metal pulleys over which
the weighted sash cords pass.
These sash-pulleys are mounted on pins or axles supported by two cheeks cast
onto a plate with rounded ends and in fixing them into the wooden sash stiles
it is necessary to recess the plate level into the face of the stile, and to cut a
mortise through the same to allow the cheeks and pulley to pass through to the
inside.
My improved machine for this purpose consists of a suitable frame fitted with
bearings to support the various shafts hereinafter mentioned and a bed plate
fitted with longitudinal and transverse slides.
The driving shaft is preferably driven by an overhead strap and is carried in
bearings on a carriage fitted to be moved to and fro on the longitudinal slides,
and near one end of this shaft is fixed a large spur wheel driving two small spur
pinions to which are fixed two circular bits or cutters which effect the recessing
and mortising of the wooden stile. Near the other end of the said shaft is
mounted a small sprocket wheel driving by means of a chain a large sprocket
wheel fixed on a second motion shaft at or near the other end of the machine.
On this second motion shaft is fitted at one end a face-plate having a crank
pin which by means of a compound connecting rod gives a to and fro longitudinal
motion to the carriage which supports the main driving shaft and circular cutters,
so as to cause the latter to make in the stile an elongated circular ended recess
to give the plate which carries the pulley the stile being fed against the cutters
to the required depth.
The compound connecting rod above referred to is composed of two rods one
connecting the crank pin to the upper end of a swinging link provided with a
curved slot, and the other connecting the cutter carriage to a stud sliding in
the curved slot.
When this stud is at the top of the slot it is in a line between the crank pin
and the carriage, and the full traverse is given to the cutters to cut a recess in
the stile the full length to receive the plate, but when this recess has been cut
to the required depth the stud is drawn down to the bottom of the curved slot
by means of a cam and then the to-and-fro motion given to the cutter carriage
is shortened to the length required for the mortise. The cam for this purpose
is mounted on a shaft placed below the link and driven by a chain from the
second motion shaft.

page_text: The feeding of the wooden stile against the cutters is performed by a double
threaded screw set transversely and actuated by a train of three bevil wheels
controlled by a cam so formed as to give the right amount of "feed" to the stile
so as to cut first the long shallow recess and then the shorter mortise all through.
This cam may be driven by means of a chain from the cam shaft previously
mentioned.
The wooden stile is fed up against the cutters by means of a
fence" moving
on the transverse slide before mentioned and actuated by the double threaded
screw.
The same screw also withdraws the stile after the mortise is completed as the
cam causes one or other of the bevil wheels to be moved into gear so as to reverse
the revolution of the screw.
WOW Stes,
I, NOEL NEWALL HAIGII, Managing Director of W B. Haigh and Co., Limited,
of Globe Iron Works, Oldham, in the County of Lancaster, Saw Mill Engineers,
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:—
This invention relates to the construction of a machine for recessing and
mortising the stiles of sash windows to receive the metal pulleys over which
the weighted sash cords pass.
The nature of my said invention and the manner in which the same is to be
performed will be readily understood on reference to the annexed two sheets of
drawings marked with figures and letters of reference corresponding with those
in the following explanation thereof.
On Sheet 1 of the drawings Figs. 1, and 2, are front view and vertical section
showing a stile or sash with the recess and mortise formed therein, and Fig. 3
shows the metal cord pulley placed therein. Fig. 4 is a side elevation, Fig. 5
an end view, and Fig. 6 a.plan view of one arrangement of my improved recessing
and mortising machine.
On Sheet 2 of the drawings Figs. 7, 8 and 9 are similar views of a modification
of the same.
The sash-pulleys a (Fig. 3) are mounted on pins or axles supported by two
cheeks b cast onto a plate e with rounded ends and in fixing them into the wooden
sash stiles it is necessary to recess the plate level into the face of the stile as
at d (Figs. 1 and 2) and to cut a mortise e through the same to allow the cheeks
and pulley to pass through to the inside.
My improved machine for this purpose (see Figs. 4, 5 and 6) consists of a
suitable frame f fitted with bearings to support the various shafts hereinafter
mentioned and a bed plate g fitted with longitudinal and transverse slides h and i.
The driving shaft j is preferably driven by an overhead strap and is carried
in bearings on a carriage k fitted to be moved to and fro on the longitudinal
slides and near one end of this shaft is fixed a large spur wheel driving two
small spur pinions m to which are fixed two circular hits or cutters » which effect

page_text: the recessing and mortising of the wooden stile so that the two recesses or mortises
for a pair of pulleys are formed simultaneously, one by each cutter. Near the
other end of the said shaft is mounted a small sprocket wheel o driving by means
of a chain represented by the dotted lines a large sprocket wheel p fixed on a
second motion shaft q at or near the other end of the machine.
On this second motion shaft q is fitted at one end a face-plate having a
crank pins which by means of a compound connecting rod t gives a to-and-fro
longitudinal motion to the carriage which supports the main driving shaft
and circular cutters n so as to cause the latter to make in the stile two elongated
circular ended recesses d to receive the plates c which carry the pulleys a, the
stile being fed against the cutters n to the required depth.
The compound connecting rod t above referred to is composed of two rods one
connecting the crank pins to the upper end of a swinging link u provided with
a curved slot, and the other connecting the cutter carriage k to a stud sliding
in the curved slot.
When this stud is at the top of the slot it is in a direct line or nearly so
between the crank pins and the carriage k, and the full traverse is given to the
cutters n to cut two recesses in the stile the full length and depth to receive
the plates c, but when these recesses have been cut to the required depth the
stud is drawn down to the bottom of the curved slot by means of a cam w and
then the to-and-fro motion given to the cutter carriage k is shortened to the
length required for the mortise e. The cam w for this purpose is mounted on a
shaft placed below the link t and driven by a chain from the second motion
shaft g
The feeding of the wooden stile against the cutters n is performed by a double
threaded screw a set transversely and actuated by a train of bevil wheels y
controlled by a cam 2 so formed as to give the right amount of "feed" to the
stile so as to cut first the long shallow recesses c and then the shorter mortises e
all through. Fig. 6 is a detached view showing more clearly the arrangement
of bevil wheels y. This cam may be driven by means of a chain from the cam
shaft previously mentioned.
The wooden stile is fed up against the cutters by means of a "fence" **
moving on the transverse slide i before mentioned and actuated by the double
threaded screw *.
The same screw also withdraws the stile after the mortise is completed as the
cam causes one or other of the bevil wheels y to be moved into gear so as to
reverse the revolution of the screw a³.
Figs. 7, 8 and 9 (Sheet 2) shew a modification of this machine the arrangement
of which is slightly varied the principal alterations being that the driving shaft
is placed in the lower part of the machine and a carrier shaft * is placed between
it and the second motion shaft q. The fence * is made a fixture (but adjustable)
the tool carriage k being fed up to its work by means of bevil gear 1 (see Fig. 9)
actuating a shaft 2 on which a cam 3 slides on a feather or key 4, and the slotted
swinging link u is hung from the top and the pin is lifted by the cam w by
means of a lever 5 (see Fig. 7).
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:-
.
First: The general construction and arrangement of recessing and mortising
machine substantially as and for the purposes described and illustrated, and
Secondly In a mortising machine for the purposes hereinbefore mentioned
the combination with the cutter carriage of a double or compound connecting
rod (as) and swinging link (as u) with a curved slot in which is a pin (as )
connecting the two parts of the rod, and a cam (as ) for raising or lowering
the said pin in the said slot, so as to straighten or bend the said connecting rod

page_text: and thus lengthen or shorten the traverse of the cutter carriage substantially as
and for the purposes described and illustrated.
Dated this 3rd day of July 1899.
GEO. DAVIES & SON,
Agents for the Applicant, 4, St. Ann's Square, Manchester.