IMPROVEMENTS IN MORTICING MACHINES
Year: 1874

page_text: LETTERS PATENT to Joseph Green and James Green Hirst, both of
Leeds, in the County of York, Engineers, for the Invention of
"IMPROVEMENTS IN MORTICING MACHINES."
Sealed the 19th March 1875, and dated the 21st September 1874.
PROVISIONAL SPECIFICATION left by the said Joseph Green and
James Green Hirst at the Office of the Commissioners of Patents,
with their Petition, on the 21st September 1874.
We, JOSEPH GREEN and JAMES GREEN HIRST, both of Leeds, in the
County of York, Engineers, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN MORTICING MACHINES," to be as follows:-
Our Invention of improvements in morticing machines has for its
object to simplify the construction of these machines and render them
less liable to derangement than morticing machines of the ordinary
kind.

page_text: up
In our improved machine the vertical spindle which carries the
morticing tool works in the brackets of an adjustable bracket frame, and
the spindle socket is connected to the actuating lever by a link or crank
pin. An arm extending from the socket embraces and works and
down on a tubular guide fixed between the two brackets of the bracket
frame. This latter (with all its appendages) is capable of being raised or
lowered in guides in the fixed standards, and of being fixed or secured at
any altitude (according to the thickness of the wood that is being operated
upon) by means of an adjusting screw, which is turned (by means of a
handle at its upper end) in a bearing at the top of the fixed standard, :
the lower end of the screw being made to enter a female screw tapped
in the tubular guide of the bracket frame. The tubular socket is
adapted to about the middle of the vertical spindle (which carries the
morticing tool), and is supported thereon between two collars fixed on
the spindle, one of which collars is provided with a handle whereby the
spindle may be turned round on its vertical axis when it is desired to
reverse the position of the morticing tool.
In order to connect the spindle and socket together, and hold them
securely in connection while the tool is at work, the socket is provided
with a spring, catch, or bolt, which will take into one of the collars, and
thus temporarily connect the two parts, but must be withdrawn (by
pulling back a pin or stud) when it is desired to release the spindle, in
order that the tool may be turned round into the reversed position.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
.
filed by the said Joseph Green and James Green Hirst in the 2
Great Seal Patent Office on the 20th March 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, JOSEPH
GREEN and JAMES GREEN HIRST, both of Leeds, in the County of York,
Engineers, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her 3
Letters Patent, bearing date the Twenty-first day of September, in
the year of our Lord One thousand eight hundred and seventy-four,
in the thirty-eighth year of Her reign, did, for Herself, Her heirs and
successors, give and grant unto us, the said Joseph Green and James

page_text: Green Hirst, Her special license, that we, the said Joseph Green and
James Green Hirst, our executors, administrators, and assigns, or such
others as we, the said Joseph Green and James Green Hirst, our
executors, administrators, and assigns, should at any time agree with,
and no others, from time to time and at all times thereafter during
the term therein expressed, should and lawfully might make, use,
exercise, and vend, within the United Kingdom of Great Britain and
Ireland, the Channel Islands, and Isle of Man, an Invention for
"IMPROVEMENTS IN MORTICING MACHINES," upon the condition (amongst
others) that we, the said Joseph Green and Jamės Green Hirst, our
executors or administrators, by an instrument in writing under our,
or their, or one of their hands and seals, should particularly describe
and ascertain the nature of the said Invention, and in what manner
the same was to be performed, and cause the same to be filed in
the Great Seal Patent Office within six calendar months next and
immediately after the date of the said Letters Patent.
NOW KNOW YE, that we, the said Joseph Green and James Green
Hirst, do hereby declare the nature of our said Invention, and in what
manner the same is to be performed, to be particularly described and
ascertained in and by the following statement, reference being had to
the Drawing hereunto annexed, and to the letters and figures marked
thercon (that is to say):
Our Invention of "Improvements in Morticing Machines" has for its
object to simplify the construction of these machines and render them
less liable to derangement than morticing machines of the ordinary
kind.
Fig. 1 in the accompanying Drawing is a side elevation of our
improved machine; Fig. 2 is a front view of the principal working
parts and Fig. 3 is a horizontal section taken in the line 1, 2, of
Fig. 1.
The vertical spindle a which carries the morticing tool b works in the
brackets c, c, of an adjustable bracket frame c', and the spindle socket a
is connected to the actuating lever d by a link d' or by a crank pin.
An arm a² extending from the socket a¹ embraces and works up and
down on a tubular guide e fixed between the two brackets c, c, of the
bracket frame c', and by this arrangement of parts the spindle a and its
socket a are made to work steadily and prevented from unduly wearing

page_text: the bearings in the brackets c, c. The bracket frame c¹ (with all its
appendages) is capable of being raised or lowered in guides f in the
fixed standards and of being fixed or secured at any altitude (according
to the thickness of the wood that is being operated upon) by means of an
adjusting screw g, which is turned (by means of a handle g¹ at its upper
end) in a bearing at the top of the fixed standard, the lower end of the
screw g being made to enter a female screw tapped in the tubular guide e
of the bracket frame. The bracket frame is then to be fixed or firmly
secured at such point by means of the screws and nuts c², c². The
tubular socket a' is adapted to about the middle of the vertical spindle a
(which carries the morticing tool), and is supported thereon between
two collars i, ¹, fixed on the spindle, one of which collars is provided
with a handle 22, whereby the spindle may be turned round on its
vertical axis when it is desired to reverse the position of the morticing
tool.
In order to connect the spindle a and socket a' together and hold
them securely in connection while the tool is at work the socket is pro-
vided with a spring, catch, or bolt (seen best in Fig. 2), which will
take into the lower collar . The lower collar is forged on to the
spindle and forms a support for the lower end of the tubular socket a¹.
A block of india-rubber serves as a buffer and prevents the collar 2¹
from striking the bracket e. By means of the spring bolt or catch the
spindle a and tubular socket a¹ are temporarily connected together, but
can be easily released when it is required to reverse the chisel b.
When it is desired to release the spindle a from the socket a¹ in order
to reverse the position of the tool, the spring catch must be drawn
back from the collar by compressing the coiled spring; the spindle a
.with the tool & may then be turned round in the tubular socket a³,
the position of the tool be thereby reversed.
and
The block of wood to be operated upon is shewn at k, and is secured
by a screw clamp ; in the ordinary manner on a movable table m,
which is actuated by means of a rack and pinion and hand wheel, as is
usually the case in machines of this class.
Having now described our Invention of "Improvements in Morticing
Machines," and having explained the manner of carrying the same into
effect, we claim as the Invention secured to us by Letters Patent as
aforesaid,-
"

page_text: First. The combination of the tubular socket a¹ with the actuating
lever d and the tubular guide e, as herein set forth, for the purpose of
ensuring an easy and steady vertical motion to the spindle socket a and
preventing any undue wear and tear of the bearings in the double
bracket frame.
Second. Raising or lowering the double bracket frame and the parts
connected therewith in the vertical guides by means of a screw adjust-
ment, as herein set forth.
Third. The mode herein set forth of connecting the spindle a to the
tubular socket a¹, so that the reversal of the position of the spindle
carrying the tool may be effected with facility.
In witness whereof, we, the said Joseph Green and James
Green Hirst, have hereunto set our bands and seals, the
Nineteenth day of March, in the year of our Lord One thousand
cight hundred and seventy-five.