Improvements in Mortising Machines.
Year: 1891

page_text: Date of Application, 20th Mar., 1891
Complete Specification Left, 7th Dec., 1891-Accepted, 23rd Jan., 1892
PROVISIONAL SPECIFICATION.
Improvements in Mortising Machines.
We EDWARD CORY, FREDERICK WILLIAM REYNOLDS and GEORGE
WADSWORTH Cragg Catford of Acorn Works, Edward Street Blackfriars
Road, London, Engineers, do hereby declare the nature of this invention to be as
follows:-
This invention has for its object the construction of a combined hand and power
mortising machine. The box or head which holds the chisel works in guides on the
frame of the machine, and has attached to it a rocking bar or lever, to the short
end of which a connecting rod, worked by a crank, drives the machine by power.
The other or longer end of the rocking bar is connected by a short link, or other-
wise, to the hand lever at or near the handle end, whilst the hand lever is made to
work on a fixed pin attached to the frame of the machine. The chisel obtains its
reciprocating stroke from the crank, and is brought down into its work by the hand
lever. To drive the machine by hand power it is only necessary to fix the crank,
when it can be worked as an ordinary hand mortising machine.
Dated this 19th day of March 1891.
EDWARD CORY.
FREDK. W. REYNOLDS.
GEO. W. C. CATFORD.
COMPLETE SPECIFICATION.
Improvements in Mortising Machines.
We EDWARD CORY, FREDERICK WILLIAM REYNOLDS, and GEORGE
WADSWORTH CRAGG CATFORD, of Acorn Works, Edward Street, Blackfriars
Road, London, S.E., Engineers, do hereby declare the nature of this invention and
in what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement :-
The object of this invention is the construction of a combined hand and power
mortising machine.
The chisel holder works in guides on the frame of the machine and has a rocking
bar connected to it by a joint, the connection being made nearer to one end of the
rocking bar than to the other. The short end of the rocking bar is driven by a
connecting rod from a crankshaft, upon which are the driving pulleys of the machine,
whilst the longer end of the rocking bar is connected through a link, or otherwise,
to the handle end of a hand lever. The hand lever works on a pin or joint supported
on the frame of the machine.
A means by which this invention may be carried out is shown in the annexed
drawing.
A is the chisel holder, carrying the chisel B, and working in guides on the
frame C. D is the rocking bar, attached by a joint to the chisel holder A.
The short end of the bar D is connected through the rod E to the crankshaft F,
which is driven by pulleys on the opposite side by means of the belt G.
The other end of the rocking bar D is connected through the link H to the hand
lever I, this hand lever being weighted at one end and made to work on the fixed
centre J. A spring catch K is also provided for holding the hand lever sufficiently
still, and is made so that it will release the lever by a little extra pressure on the
handle. A screw stop is also placed at L to regulate the depth that the lever I
can be brought down, thereby regulating the depth of the mortice.

page_text: When the machine is driven by power, the chisel B receives a reciprocating stroke
from the crankshaft F, through the connecting rod E and rocking bar D, whilst
the hand lever I remains still.
On lowering the hand lever 1, the chisel B is brought down into the piece of
wood to be mortised, which is held on the sliding bed and moved along with the
handwheel N. It will be seen therefore that the hand lever is held still when
mortising, the motive power meanwhile doing the work.
When it is desired to use the machine by hand power only, the crankshaft is held
still by a screw, or otherwise, which is inserted into the frame (through the
hole in the counterbalance of the crank, or in any suitable manner to keep the
crank from moving. The hand lever can then be worked up & down like an
ordinary hand mortising machine thereby driving the chisel.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is.
The combination of a rocking bar, driven by motive power, for actuating the
chisel of a mortising machine, and the connection of this bar with a hand lever for
the purpose of bringing the chisel down into its work, substantially as described.
Dated this 17th day of December 1891.
EDWARD CORY.
FREDERICK WILLIAM REYNOLDS.
GEORGE WADSWORTH CRAGG CATFORD.