IMPROVEMENTS IN MORTICING AND BORING MACHINES
Year: 1879

page_text: LETTERS PATENT to James Green Hirst, of Leeds, in the County of York,
for the Invention of "IMPROVEMENTS IN MORTICING AND BORING MACHINES."
100
LETTERS PATENT to James Green Hirst, of Leeds, in the County of York,
for the Invention of "IMPROVEMENTS IN MORTICING AND BORING MACHINES."
Sealed the 20th April 1880, and dated the 23rd October 1879.
PROVISIONAL SPECIFICATION left by the said James Green Hirst at the
Office of the Commissioners of Patents on the 23rd October 1879.
JAMES GREEN HIRST, of Leeds, in the County of York. "IMPROVEMENTS IN
MORTICING AND BORING MACHINES."
The framework is of ordinary construction on which is mounted the slide; ou
this is provided a tool holder for the morticing or boring tools, and for boring or
reversing purposes the tool is fitted into a spindle within the tool holder, to which
for morticing purposes a vertical reciprocating motion is imparted, and for this
purpose is provided a hand lever carried on a pin fixed in the framework and
attached to the tool holder by means of a connecting rod. For the purpose of
increasing or reducing the traverse of the tool, and keeping the stroke of the lever
always the same, the connecting rod is made adjustable in its length, or coupled
shorter or longer to the lever and tool holder. Suitable catch or pin is provided for
preventing the spindle carrying the tool from turning during the operation of
morticing.
By this arrangement also the same may be liberated at pleasure for reversing
the morticing tool, also when released the spindle may be caused to revolve for
drilling or boring purposes. The morticing tool is barbed with several notches or
indentations for the purpose of withdrawing the material cut away from the hole
whilst being morticed.
The table on which the material is operated is provided with an arrangement for
bringing the work to any desired angle, and when used for nave morticing
headstocks are employed, between which the nave to be operated upon is mounted.
Dividing plates are provided for adjusting the nave, and an index plate is also
provided on the adjustable table for the purpose of regulating the angle thereof.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said James Green Hirst in the Great Seal Patent Office on the 23rd
April 1880.
JAMES GREEN HIRST, of Leeds, in the County of York.
MORTICING AND BORING MACHINES."
"IMPROVEMENTS IN
The framework is of ordinary construction on which is mounted the slide; on
this is provided a tool-holder for the morticing or boring tools, and for boring or
reversing purposes the tool is fitted into a spindle within the tool-holder, to which
for morticing purposes a vertical reciprocating motion is imparted, and for this
purpose is provided a hand lever carried on a pin fixed in the framework and
attached to the tool-holder by means of a connecting rod. For the purpose of
reducing or increasing the traverse of the tool, and keeping the stroke of the lever
always the same, the connecting rod is made adjustable in its length, or coupled
shorter or longer to the lever and tool holder. Suitable catch or pin is provided for
preventing the spindle carrying the tool from turning during the operation of
morticing.
By this arrangement also the same may be liberated at pleasure for reversing
the morticing tool, also when released the spindle may be caused to revolve for
drilling or boring purposes. The morticing tool is barbed with several notches or
indentations for the purpose of withdrawing the material cut away from the hole
whilst being morticed.
The table on which the material is operated is provided with an arrangement
for bringing the work to any desired angle, and when used for nave morticing
headstocks are employed, between which the nave to be operated upon is
mounted.
Dividing plates are provided for adjusting the nave, and an index plate is
also provided on the adjustable table for the purpose of regulating the angle
thereof.
And in order that my Invention may be more completely understood, reference
is given to the accompanying Drawings and to the letters and marks thereon.
DESCRIPTION OF DRAWINGS.
Fig. 1 is a side elevation; Fig. 2, a front elevation; and Fig. 3, a modification in
adjusting apparatus.
a is the framework of ordinary construction, on which is mounted a slide b, to
which is fitted a tool holder c, constructed so as to receive the morticing or boring
tools. For boring or reversing purposes the tool is fitted into a spindle d within the
tool holder. For the purpose of imparting a vertical reciprocating motion I provide
a hand lever e, by preference over the centre of the tool, and carried on a pin f
which is fixed in the framework a. The hand lever e is attached to the tool holder c
by means of a connecting rod g, and for the purpose of reducing or increasing the
traverse of the tool, and keeping the stroke of the lever e always the same, the
connecting rod g is either of a variable or adjustable length, or I provide any
required number of holes in the tool holder c, whereby the connecting rod g may be
coupled shorter or longer to the lever e and tool holder c.
Any suitable known means may be employed for preventing the spindle carrying
the tool from turning round during the operation of morticing, and a like arrange-
ment may be employed also for liberating at pleasure, for the purpose of reversing
such morticing tool, and also when released the machine may be employed, having
suitable tools applied thereto, for drilling or boring purposes.
The morticing tool is shewn at h, and is barbed at i with several notches or
indentations for the purpose of withdrawing the material as it is cut away from the
holes whilst they are being morticed.

page_text: jis the table; this is provided with an arrangement for bringing the work to any
desired angle, and when used for nave morticing the headstocks and are
employed, of which k is made fast, and capable of adjustment in the slide m, the
adjusting arrangement being of ordinary construction. Between these headstocks
and on the centres, spindles, or bearings n and o, the nave is mounted and adjusted
preparatory to being operated upon.
A dividing plate p is provided at q for adjusting the nave on the spindle n
and is provided with a catch or spring ", whereby it is held at any desired
angle.
A modification of this arrangement is shown at Fig. 3, in which the spring r is
dispensed with, and a hollow stud 8, provided with an internal spring t and acting
upon a spindle u, fitted into it, this being retained by means of such spring t in any
desired hole or recess in the dividing plate.
The adjusting arrangement of table and other parts not explained may be of
ordinary construction.
Having now described the nature of my said Invention, and described with the
aid of Drawings how the same may be carried into practice, I would have it
understood that I do not limit myself to the precise details or configuration of the
parts I have described and shewn, as the same may be varied or modified without
departing from the nature of my said Invention, but what I do claim and desire to
be secured to me by Letters Patent is,-
First. The means or apparatus employed for the purpose of increasing or
reducing the traverse of the tool, substantially as and for purposes herein set
forth.
Second. The construction of morticing tool, substantially as herein set forth.
Third. The arrangement, construction, and application of dividing plate and
parts connected therewith for adjusting naves to any desired angle, substantially
as herein set forth.
Fourth. The combination of the various parts formning the machine, substantially
as berein set forth.
In witness whereof, I, the said James Green Hirst, have hereunto set my hand
and seal, this Twenty second day of April, in the year of our Lord One
thousand eight hundred and eighty.
JAMES G. HIRST. (L.S.)