Year: 1896

page_text: I, THOMAS JAMES RYLAND, of 114, Cold Harbour Lane, Brixton, in the County
of Surrey, Mechanic, do hereby declare the nature of this invention to be as
follows:-
The invention has for its object improvements in dovetailing machinery with a
view to the production of a cheap, convenient and efficient machine.
For this purpose I employ a rotating vertical spindle to carry the dovetailing
tool and I mount this spindle in bearings carried by the front rail of a movable
frame capable of movement in any direction in a horizontal plane. I connect this
movable frame at the front to a vertical pin standing up from a slide carried by
another slide at right angles thereto, one of such slides being capable of moving
in a direction from front to back of the machine whilst the other is capable of
moving in a direction from end to end of the machine..
By this means the front of the movable frame is capable of regulation in height
on the vertical pin to regulate the depth to which the dovetailing tools shall cut.
The said movable frame is constructed and mounted in somewhat similar
manner to that of the tool carrying frame in a wood carving machine described in
the Specification of Letters Patent No. 13703 of the year 1893 and the front rail
of said movable frame is capable of a swivelling motion to enable it to retain its
vertical position notwithstanding that the main part of the said frame may at
times be somewhat inclined.
The said front rail when adjusted is fixed. rigidly to the other part of the movable
frame. I prefer to carry the band for driving the rotating cutter sideways over
guide pulleys and thence to the back of the machine whence it passes to a suitable
driving drum which may be similar to that described in the above-mentioned
specification or by a travelling wheel. This arrangement of the driving band
leaves the machine bed free behind the cutter to accommodate any length of
material which may be required to be dovetailed. The machine bed has a number
of holes formed therein in a direction lengthwise thereof and a spring pin attached
to the longitudinally moving slide is capable of being placed in succession or
other desired order in said holes to shift the dovetailing cutter to the positions
required for the dovetails.
The bed of the machine is also provided with horizontal and vertical clamping.
mechanism so that when required a piece of material lying flat on the machine
bed may be clamped to another piece placed in a vertical position to enable the
dovetails in both pieces to be simultaneously cut whilst the said clamping
arrangements may if desired be separately used.
801
1000
HARRIS & MILLS,
23, Southampton Buildings, London, W.C., Agenta

page_text: I, THOMAS JAMES RYLAND, of 114, Cold Harbour Lane, Brixton, in the County
of Surrey, Mechanic, 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:-
The invention has for its object improvements in dovetailing machinery with a
view to the production of a cheap, convenient and efficient machine.
My invention is illustrated in the accompanying drawings in which Fig. 1 is a
vertical section, Fig. 2 a plan, Fig. 3 a vertical section of parts drawn to a larger
scale than Figs. 1 and 2 and Figs. 4 and 5 are details drawn to a still larger scale
of a dovetailing machine constructed according to my invention. Fig. 6 is a front
view, Fig. 7 a plan and Fig. 8. a cross section of a modified form of dovetailing
machine. Fig. 9 is a cross section of parts drawn to a larger scale than Figs.
6, 7, 8 and Figs. 10, 11 and 12 are respectively two elevations drawn at right angles
tc cach other and an end view of the rotary dovetailing tool.
In all the Figures like parts are indicated by similar letters of reference.
I will first describe the machine shown at Figs. 1 to 5.
According to my invention I employ a rotating spindle a slightly inclined from
the vertical to carry the dovetailing tool a and I mount this spindle a in bearings b
carried by the front rail 6 of a movable frame b1 62 63 capable of movement in any
direction in a horizontal plane in the following manner. This frame has fitted 2
thereto grooved rollers 6 supported on a bar c with capability of moving to and fro
thereon in a line parallel with the front of the machine and this bar c is fitted with
grooved rollers el supported on bars d with capability of moving to and fro thereon
in a line at right angles with the bar c.
I connect the front rail of this movable frame by a bracket 6* to a pin e' fixed 2
10 and standing up from a slide e carried by and capable of movement in a direction
from front to back of the machine on another slide f at right angles thereto, which
latter slide is capable of movement in a direction parallel with the front of the
machine on a bed y fixed to the top or table of the machine frame h
fis an adjustable stop to limit the backward motion of the slide e and 3
consequently of the cutter frame.
By this means the front 6 of the movable frame b 2 is capable of regulation
in height on the pin e' to regulate the depth to which the dovetailing tool a shall
cut.
-
The front rail of this movable frame is capable of a swivelling motion on the 3
screws to enable it to retain its required position notwithstanding that the other
parts of the frame may at times be somewhat inclined. This said bar b' is when
adjusted fixed rigidly to the other parts of the movable frame by locking bolts
66.
The cutter spindle a¹ has fixed thereon a pulley a² around which a band or cord 4
i, is passed and, when the machine is dovetailing short lengths of material, such
band or cord i passes directly backwards and over guide pulleys 67 mounted on the
bar 63 of the movable frame thence over guide pulleys carried by a shaft j
mounted on guides and pulled downwards by springs to keep a constant tension
on the band or cord i and from such guide pulleys the band or cord i is passed 4
around the drum k or around a travelling wheel to which rotary motion is given
by a strap passing round, a pulley on the axis thereof.
When however long lengths of material are being dovetailed I pass the band or

page_text: cord i sideways from the pulley a² on the spindle of the rotating cutter a and thence
over guide pulleys & whence it passes over guide pulleys to and around the
drum k. This latter arrangement of the driving hand or cord leaves the machine
bed free behind the cutter to accommodate any length of material required to be
dovetailed.
The top or table h¹ has fixed thereto a dividing plate with rows of holes formed
therein in directions lengthwise thereof and a spring finger m carried by the slide
f is capable of being placed in succession or in other desired order in said holes of
either row to shift the cutter a to the positions required for the dovetails to
facilitate which the dividing plate I is capable of adjustment by means of the slots
and binding screws to bring either row of holes into line with the spring
finger m.
The top or table of the machine, is also provided with horizontal clamping
mechanism n and vertical clamping mechanism o so that when required a piece
of material A lying flat on the machine bed may be clamped to another piece B
placed in a vertical position to enable, the dovetails in both pieces to be
simultaneously cut as represented at Fig. i whilst the said clamping arrangements
may if required. he separately used. 2 is an adjustable fence against which the
material is placed. 7 is a roller to support the inovable frame bon cone
side to prevent twisting thereof in use.
Thus when material is clamped in position and the dovetail cutter set in motion
the frame is pushed fack until the slide e comes against the stop f¹ which
will limit the distance to which the cutter will act on the material. The cutter
frame is then pulled forward the spring finger m lifted out of the hole in the
dividing plate 1, the slide e and cutter frame are moved sideways to the next hole
in the dividing plate and the spring finger m dropped therein, when the cutter
frame is again pushed backwards and a fresh notch cut in the material and so on.
In Fig. 3 the cutter is represented as cutting a "lap dovetail."
I will now describe the machine represented at Figs. 6 to 9. The cutter shown
at Figs. 10, 11, 12 is precisely similar to that used in the machine shown at Figs.
1 to 5 but in the modification shown at Figs. 6 to 9 the said cutter is reversed in
position and two are shown in use both being driven by the same band i the bar
carrying the cutters is a fixture on the slide e* and the latter is moved
backwards and forwards by a hand wheel e and serow e instead of being merely
pushed; the slide f is moved along the bed y by means of a pinion on an axis
carried by a bracket ffixed to the slide f, such pinion gears with a rack g' fixed
to the bed g and is rotated by hand wheel /. The clamping mechanisms and o
are carried respectively by bars a' o' attached to brackets fixed to the machine
frame.
f
The stop is carried by the slide e and acts against the front of the slide f*:"
the dividing plate has notches formed on its front edge and is fixed to the bed
g: a hinged finger m mounted in a bracket attached to the slide f acts in
connection with such dividing plate to determine the distance of travel of the
cutters a. An adjustable fence is fixed to the front bar 3. To vary the distance
of travel of the dovetailing cutters I employ dividing plates / differently divided
and substitute one for the other as may be required. If a long notch is required
between the dovetailing pins the spaces in the dividing plate are elongated to
correspond.
The action of the two machines is identical and the material to be dovetailed is
held in like manner with the exception that the piece of vertical material extends
above the table hand the cutters are reversed in position in the latter modification.
The cutters of both machines are mounted and rotated alike and they are carried
in both cases by a bar which is capable of being moved by means of cross slides in
directions from front to back and sideways of the machine.
It will be evident that more than two cutters may be employed and that more
than a single piece of material may be worked at the same time in this latter.
machine.

page_text: 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 dovetailing machine the combination of a rotary cutter of shape to form
a dovetail notch, a pulley on such cutter spindle, a band passing round such pulley,
guide pulleys, and tension pulleys over which such band passes, a drum for driving
such band, a bar carrying the cutter, cross slides carrying such cutter carrying
bar, a dividing plate and a finger, acting therewith to regulate the distance of
travel sideways of the cutter and a stop to limit the inward travel of the cutter
substantially as herein set forth.
2. In dovetailing machines the general arrangement and combination of parts
substantially as herein set forth.
Dated this 21st day of June: 1897.
HARRIS
&
MILLS,
23, Southampton Buildings, London, Agents.