Improved Mortising Machine.
Year: 1891

page_text: Date of Application, 15th June, 1891
Complete Specification Left, 19th Nov., 1891-Accepted, 30th Jan., 1892
PROVISIONAL SPECIFICATION.
Improved Mortising Machine.
We JOHN HENRY HALL of No. 47 West Bank Stamford Hill in the County
of Middlesex, Agent, and DENNIS PARRY of No. 147 Railton Road, Herne Hill,
in the County of Surrey, Engineer, do hereby declare the nature of this invention
to be as follows:-
A machine for cutting rectangular, square, round and oval holes in wood or
metal as the case may require.
For cutting wood across the grain the means we use are two small circular saws
or cutters of the right shape, and a chain saw-and for cutting parallel to the grain
by means of a cutter-link introduced at certain distances in the chain, together
with the saws and cutters before mentioned.
For the purpose of this invention we use a beam having part square section and
flanged at one end for fixing-the other part is rectangular section to suit the
chain. A movable square nut is fitted on the square section and through this a
spindle passes,
At one end of this spindle is the driving pulley, and at the other end is a flanged
spigot wheel which drives the chain above mentioned.
The extreme end of the rectangular section is drilled and slotted for a short
spindle and spigot wheel. The spigot wheel is fixed on the short spindle to carry
the chain, and two circular saws or cutters are fixed at the extremities of the same
small spindle.
The chain is made of flat links with teeth cut on the exterior, and the cutter links
above mentioned are introduced in the chain when necessary.
The chain saw has a double object :-First, for driving the saws or cutters, and
secondly, for cutting away the wood intervening between the saws.
Dated this Fifteenth day of June 1891.
JOHN H. HALL.
DENNIS PARRY.
COMPLETE SPECIFICATION.
Improved Mortising Machine.
We JOHN HENRY HALL of No. 47 West Bank, Stamford Hill, in the County
of Middlesex, Agent, and DENNIS PARRY late of No. 147 Railton Road, but now
of No. 38 Spenser Road, Herne Hill, in the County of Surrey, Engineer, do
hereby declare the nature of this invention and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:
A machine for cutting rectangular, square, round, and oval holes in wood or
metal as the case may require. For cutting wood across the grain the means we
use are two small circular saws or cutters of the right shape and a chain-saw-and
for cutting parallel to the grain we use a cutter-link introduced at certain distances
in the chain, either with or without the saws and cutters before mentioned.
Our said invention will be understood by the annexed drawings, in which at
Fig. 1 we shew a side elevation of the machine.
Fig. 2 is a plan of the machine.

page_text: Fig. 5 is end view of cutter-link.
Fig. 6 is an elevation of the cutter-link.
Fig. 7 is plan of the same.
Fig. 8 is end view of chain-saw.
Fig. 9 is elevation of chain-saw.
Fig. 10 is plan of chain-saw.
For the purpose of this invention we use a rectangular section beam A Fig. 1
and 2, with flange B at one end. The other end is slotted and drilled to take the
sprocket wheel C Fig. 3, and the spindle D Fig. 1. The flanges E Fig. 3 are
rivetted on to the spindle D before mentioned, and guide the chain in passing over
the sprocket wheel. The nut F Fig. 1 and 2 is made in halves. It slides on the
beam A in order to put the requisite tension in the chain. The said nut F is fixed
in position by tightening the set-bolts G Fig. 1 and 2. The spindle H Fig. 2
passes through the nut F and on one end of this spindle is fixed the driving
pulley I Fig. 1 and 2. On the other end of the said spindle is another sprocket
wheel and flanges as shewn by the dotted lines Fig. 1. These are held in position
on the spindle by the nut J. K Fig. 1. 2. 5. 6 and 7 are the cutter-links. L Fig. 1
and 2 are the connecting links. M Fig. 8. 9. and 10 are the links which form
the chain-saw. This chain-saw has a double use-first, for driving the saws and
also the cutter blocks, and secondly, for cutting away the wood intervening between
the saws.
The foregoing description applies to cutting rectangular holes.
For cutting square holes we remove the circular saws and sprocket wheel, or the
flange, whichever may be in use (these are secured together on the spindle as
shewn in Fig. 3) and we substitute cutter blocks and sprocket wheel, the
diameter and width of said cutter blocks being the same dimensions as the square
hole required.
N. Fig. 11 and 12 are the cutter blocks.
These cutter blocks are driven by the cutter chain engaging with the sprocket
wheel C Fig. 11: the chain cuts away the centre, and the blocks cut the hole out
on each side of the chain.
For cutting circular and oval holes the operation is precisely the same as for
square holes, substituting only circular or oval cutter blocks O and P Fig. 13. 14.
15 and 16 as the case may require.
The circular saws are secured on the spindle D Fig. 1.
The chain-saws are mounted in the machine in precisely the same manner as the
cutter-chain which is formed of links and cutters K L Fig. 1.
The cutter-link and flanges shewn in Fig. 1 and 3 are used only for cutting wood
parallel to the grain, and the chain-saws and circular saws or cutter blocks for
cutting wood across the grain, and also for square, round and oval holes.
The material to be operated upon is fixed on a table in such a manner that it is
always perpendicular to the direction in which the machine advances as shewn by
arrow Fig. 1. The chain saw & the position of the material is shewn in
Fig. 17.
The manner in which the said machine is worked is as follows:-
:―
The machine is attached to a sliding block working freely in slides formed in the
external frame which also supports the table before mentioned. The material to be
operated upon, being firmly fixed in position on the table, the chain is set in motion
at a very high speed by means of the driving pulley I. The machine is then
brought into contact with the material by means of a hand lever acting on the
sliding block before mentioned, and as the machine advances by the pressure
applied to the hand lever, it cuts its way through the material as far as required-
the lever being then released, the machine returns to its former position by the
action of counter-balance weights.
The machine may be worked either horizontally or vertically.

page_text: Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what
we claim is:-
1. A continuous chain formed of several cutter-links K Fig. 1. 2. 5. 6 and 7, and
connecting links L Fig. 1 and 2.
2. A continuous chain-saw formed of links M Fig. 8. 9 and 10.
3. A machine constructed as herein described with the apparatus and appliances
connected with the same also described, for cutting rectangular, square, round, and
oval holes in wood or metal.
4. Cutter blocks for cutting square, circular and oval holes as herein described,
and shewn in drawing Fig. 11. 12. 13. 14. 15. 16.
Dated this 19th day of November 1891.
JOHN HENKI HALL.
DENNIS PARRY.