IMPROVEMENTS IN MORTISING MACHINES
Year: 1876

page_text: LETTERS PATENT to John Phillips, of Kennington, in the County of Surrey,
Engineer, for the Invention of "IMPROVEMENTS IN MORTISING MACHINES."
PROVISIONAL SPECIFICATION left by the said John Phillips at the Oflice of
the Commissioners of Patents on the 7th February 1876.
JOHN PHILLIPS, of Kennington, in the County of Surrey, Engineer.
MENTS IN MORTISING MACHINES."
" IMPROVE-
My Invention relates to that class of reciprocating mortising machines which are
worked by means of a hand lever, and the object of the Invention is to simplify the
construction of such machines by reducing the weight of metal used, while at the
same time greatly increasing the strength of the machine and the length of stroke
that can be given to the mortising tool.
In mortising machines as at present constructed it is necessary to make the frame
of a very heavy casting in order to obtain the requisite strength, and even then it
is liable to break when a piece of hard wood is being operated upon, the strain on
the frame being very great owing to the fact that the fulcrum of the lever is placed
in the upper part of the frame.
In carrying out my Invention I cast the frame of the machine and the bed plato
together, and in the upper part of the frame I make a groove or slot to form a guide
in which the tool carrier works.
The fulcrum for the hand lever is in a forked bearing at the upper end of a
rocking bar or lever, which is jointed at its lower end to the bed plate or base of tho
machine.
The hand lever may be connected in any convenient manner direct to the tool
carrier, instead of by a link, as heretofore.
By constructing a mortising machine in this manner I am enabled greatly to
reduce the weight of the frame, the whole of the strain being taken up by the
rocking fulcrum bar or lever attached to the bed plate or base of the machine, the
frane itself being required as a guide only for the tool carrier. I am also enabled
greatly to simplify the construction of the tool carrier.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said John Phillips in the Great Seal Patent Office on the 5th August
1876.
JOHN PHILLIPS, of Kennington, in the County of Surrey, Engineer.
MENTS IN MORTISING MACHINES."
"
"IMPROVE-
My Invention relates to that class of reciprocating mortising machines which are
worked by means of a hand lever, and the object of the Invention is to simplify the
construction of such machines by reducing the weight of metal used, and at the
same time greatly increase the strength of the machine and the length of stroke
that can be given to the mortising tool.
In mortising machines as at present constructed it is necessary to make the frame
of a very heavy casting in order to obtain the requisite strength, and even then it is
liable to break at the shoulder when a piece of hard wood is being operated upon,
the strain on the frame being very great owing to the fact that the fulcrum of the
lever is placed in the upper part of the frame.
In carrying out my Invention I cast the frame of the machine and the bed plate
together, and in the upper part of the frame I make a groove or slot to form a guide
in which the tool carrier works.
The fulcrum for the hand lever, instead of being placed in the upper part of the
frame is in a forked bearing at the upper end of a rocking bar, which is jointed at
its lower end to the bed plate or base of the machine.
The hand lever is connected in any convenient manner direct to the tool carrier
instead of by a link as heretofore.
By constructing a mortising machine in this manner I am enabled greatly to
reduce the weight of the frame, the whole of the strain being taken up by the
rocking fulcrum bar attached to the bed plate or base of the machine, the frame
itself being required as a guide only for the tool carrier. I am also enabled greatly
to simplify the construction of the tool carrier.
In the accompanying Drawing Fig. 1 is a side elevation of my improved mortising
machine, and Fig. 2 is a front view of the same.
a is the frame of the machine, which is cast in one piece with the bed plate or
base b; c is the groove or slot, which forms a guide in which the tool carrier d
works; e is the hand lever, which is provided with a counterweight c', and has its
. fulcrum in a forked bearing in the upper part of a rocking bar f. This rocking
bar fis jointed at its lower end to the bed plate or base of the machine. The
hand lever e is connected at e direct to the tool carrier in any convenient manner,
instead of by a link, as is usual in this class of machine. By using this rocking
bar f I am enabled greatly to reduce the weight of the frame a, as the strain instead
of being on the upper part of the frame when the machine is being worked, as in the
old machines, is taken up by the rocking bar fand the base plate of the machine.
I am also enabled to obtain a greater length of stroke by reason of the oscillating
fulcrum of the hand lever c.
In order further to simplify the construction of the machine, and to obviate
the difficulties of packing the same for transport, I dispense with the usual
awkward four-legged stand, and in place thereof I substitute a cast-iron column
and base g, which is bolted or otherwise firmly secured to the bed plate b of the
machine.
Having now set forth the nature of my Invention of "Improvements in Mortising
Machines," and explained the manner of carrying the same into effect, I wish it to
be understood that under the abovo in part recited Letters Patent I claim,―
The general construction and arrangement of parts forming a mortising machine,
as and for the purpose herein set forth.

page_text: I also claim mounting the hand lever e in a bearing at the upper end of a rocking
fulcrum bar, as and for the purpose herein set forth.
In witness whereof, I, the said John Phillips, have hereunto set my hand and
scal the Fourth day of August, in the year of our Lord One thousand eight
hundred and seventy-six.
JNO. PHILLIPS. (L.S.)