IMPROVEMENTS IN FRET SAWING MACHINES AND IN APPLIANCES FOR WORKING THE SAME, ALSO APPLICABLE TO OTHER KINDS OF MACHINES
Year: 1877

page_text: LETTERS PATENT to Charles Addison Davies, of 152, Lancaster Road, Notting
Hill, in the County of Middlesex, for the Invention of "IMPROVEMENTS IN
FRET SAWING MACHINES AND IN APPLIANCES FOR WORKING THE SAME, ALSO
APPLICABLE TO OTHER KINDS OF MACHINES."
Sealed the 5th June 1877, and dated the 29th March 1877.
PROVISIONAL SPECIFICATION left by the said Charles Addison Davies at
the Office of the Commissioners of Patents on the 29th March 1877.
66
CHARLES ADDISON DAVIES, of 152, Lancaster Road, Notting Hill, in the County
of Middlesex. IMPROVEMENTS IN FRET SAWING MACHINES AND IN APPLIANCES
FOR WORKING THE SAME, ALSO APPLICABLE TO OTHER KINDS OF MACHINES."
The object of this Invention is to supersede the present expensive and clumsy
method of constructing and working fret saws, and is applicable to other kinds of
machines. For this purpose I make the fixed frame of a horizontal bar, which at
the back end bends upwards and forwards partly over the horizontal portion, the
upper part terminating in a wider part, which is slotted out and beut round, so
that such a slot may stand vertically. The front end of the horizontal bar is bent
sharp round so as to stand upright, and at right angles to the horizontal portion, to
which upright is screwed or bolted the table on which the material to be operated
upon is placed, such table having an aperture to allow of the saw working freely
through it. Underneath the horizontal bar, and at any suitable distance from its
front and rear ends, is fixed a vertical arm, having its lower end forked and jointed
to a horizontal lever extending from directly underneath the saw backwards to a
short distance beyond the point where the fixed frame curves upwards. From its
back end a chain, catgut, or any suitable connection, is carried vertically upwards
to another horizontal lever of somewhat similar form and length working on a pin
fixed in its proper position by a screw fitted in the above-mentioned slotted portion
of the fixed frame, the purpose of the slot being for tightening or slacking the
connection between the two horizontal levers. The frout ends of both the upper
and lower levers are furnished with sockets, in which the two ends of the saw are
inserted and fixed tight by means of set screws. The body of the machine being
thus completed I cause the same to work by connecting the front end of the lower
lever to a cam or crank fixed on a shaft which is made to revolve either by treadle
motion or by steam or other power.

page_text: In addition to the saw I also employ the machine for drilling and boring, for
which purpose
I fix a pulley to a shaft, which I cause to revolve by bringing the
periphery of the pulley into contact with the periphery of the wheel, driving the
machine by means of a known mechanism or lever arrangement.
When it is requisite to stop the drill the pulley may be readily withdrawn by
the same means from contact with the driving wheel. The end of the shaft on
which the pulley is fixed is formed into a drill socket.
For the purpose of increasing the friction and avoidance of noise the drill pulley
may be covered with leather or other suitable material.
The particular treadle motion I employ is for the purpose of rendering the action
of the foot much easier, and consists of a bowed shaft, to any suitable part of the
bow of which I fix a bracket made so as to stand vertically, and having at the top
a bearing in which works a pin fitted eccentrically to a wheel (as in the case of a
crank pin) keyed on to the cam or driving shaft in such manner that by a slight
and easy action of the foot the bowed shaft is moved backwards and forwards,
carrying with it the bracket which carries round the eccentric pin, and with it the
wheel, which by means of a driving belt or other means the motion is communicated
to the cam or crank shaft; or the motion may be transmitted directly from the
treadle to the machine.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Charles Addison Davies in the Great Seal Patent Office on the 12th
June 1877.
CHARLES ADDISON DAVIES, of 152, Lancaster Road, Notting Hill, in the County
"IMPROVEMENTS IN FRET SAWING MACHINES AND IN APPLIANCES
FOR WORKING THE SAME, ALSO APPLICABLE TO OTHER KINDS OF MACHINES."
of Middlesex.
The object of this Invention is to supersede the present expensive and clumsy
method of constructing and working fret saws, and is applicable to other kinds of
machines. For this purpose I have a bench or table similar to the ordinary sewing
machine table or stand; to this table or stand I fix a horizontal frame of metal or
wood ai
the lower part or end a¹ is fixed under and about the middle of the wood
bench or table, curving upwards and forwards over the bench or table, the upper
part being bent round so as to stand vertically, and is slotted out at u. Under-
neath this horizontal frame a vertical arm is fixed, its lower end forked or
otherwise; I now have a horizontal lever c, the centre of which works in the
vertical arm b; the further end of the lever extends a short distance beyond the
wood bench or table; to the end of this lever I fix a chain, catgut, or any suitable
connection d, which is carried vertically upwards to another horizontal lever e of
somewhat similar form and length, working on a pin fixed in its proper position by
screw fitted in the above-mentioned slotted portion of the fixed frame, the
purpose of the slot being for tightening and slacking the saw g fixed to the two
front ends of the upper and lower levers; the front ends of these two levers aro
furnished with sockets h and h, in which the two ends of the saw are inserted and
fixed tight by means of set screws, the lower socket h¹ is made rather deep (either
round or square), and projects through and works in an orifice i formed in the
table or stand, and acts as a guide for the saw to work vertically.
In front of the bench or table I fix an adjustable table ; working in a vertical
arm, and held in position by a screw; on this table the material to be operated
upon is placed, such table having an aperture to allow of the saw working freely
through it.
In addition to the shw I also employ the machine for drilling and boring, for
which purpose I fix a pulley k to a shaft which I cause to revolve by bringing the
periphery of the pulley in the contact with the periphery of the wheel , driving
the machine by means of a suitable mechanism or lever arrangement,

page_text: When it is requisite to stop the drill the pulley k may be readily withdrawn by
the same means from the contact with the driving wheel; the end of the shaft on
which the pulloy is fixed is formed into a drill socket.
For the purpose of increasing the friction and avoidance of noise the drill pulley
may be covered with leather or other suitable material. The body of the machine
being thus completed I cause the same to work by connecting the front end of the
lower lever to an adjustable can or crank m fixed on the crank shaft n, which is
nade to revolve either by treadle motion or by steam or other power.
The particular treadle motion I employ is for the purpose of rendering the action
of the foot much easier, and consists of a bowed shaft o, to any suitable part of the
bow of which I fix a bracket p, and having at the top a bearing in which works a
pin fitted eccentrically to a wheel (as in the case of a crank pin) keyed on to the
driving wheel q in such manner that by slight and easy action of the foot the
bowed shaft is moved backwards and forwards, carrying with it the bracket which
carries round the eccentric pin, and with it the wheel, from which by means of a
driving belt or other means the motion is communicated to the cam or crank shaft,
or the notion may be transmitted directly from the treadlo to the machine.
Having now described the nature of my Invention, and the manner in which the
same is to be performed, I wish it to be understood that I do not limit myself to
the precise details herein-before described, as the same may be varied without
departing from the nature or principle of my said Invention, but what I claim as
my Invention is, the improvements in the construction of "Fret Sawing Machines
and in Appliances for Working the same, also Applicable to other kinds of
Machines," substantially as herein described and as illustrated, or any mere
variation or modification thereof. In conclusion I would have it understood that
my improved treadle, as above described, worked by the to-and-fro motion of the
foot, thereby causing the driving wheel to revolve, which I claim as new and novel,
can be applied to sewing and other machines.
In witness whereof, I, the said Charles Addison Davies, have hereunto set
my hand and scal, this 7th day of June, in the year of our Lord One
thousand eight hundred and seventy-seven.
CHARLES A. DAVIES. (L.S.)