Improvements in Pantograph Engraving Machines.
Year: 1899

page_text: Data.nf Application
2nd July,
11000
Complete Specification Left. 3rd Apr 1900-Accented 26th May 1000.
Complete Specification Left, 3rd Apr. 1900-Accepted 26th May 1000.
T
PROVISIONAL SPECIFICATION.
Improvements in Pantograph Engraving Machines.
We, WILLIAM HENRY LOCK, Manager and Secretary of The Linotype Com-
pany, Limited, of 188, Fleet Street, in the City of London, and MARK BARR,
of The Linotype Works, Broadheath, in the County of Chester, Engineer, do
hereby declare the nature of this invention to be as follows:-
The present invention relates to improvements in pantograph engraving
machines, more especially to those capable of dealing with three dimensions,
length, width and depth, by a swinging and vertically moving tracer and tool.
The frame of the machine carries a bar pivotted by its ends in suitable
bearings. Both tracer rod and tool holder pass through a respective block
pivotted in or on this bar at right angles with its axis. The horizontal motion
of the tracer rod is communicated to the tool holder by a link from one to the
other. This link is preferably above the bar. The vertical motion of the
tracer rod is communicated to the tool holder by a télescopic lever, preferably
above the bar and having its fulcrum therein, adjustable lengthwise thereof,
and on the opposite side of the tool holder to the tracer rod. The tool holder
is pivotted on this lever.by a pivot parallel with those of the two blocks above
described. The connection between the lever and the tracer rod is also pivotal
in the same sense and adjustable vertically upon the latter.
Each table, pattern and work is carried by a stem depending from its
underside at right angles with it and which stem extends downwards through
a ball and socket joint in the machine frame, each stem being made fast to
its ball. There is a rod extending from one ball to the other. It is connected
to them both by a joint at each end of it, each joint conveniently having the
form of a socket pivotted upon the end of the rod, and receiving a pin project-
ing from the ball and axially aligned with the table stem. The rod slides
longitudinally through a guide or guides adapted to slide in a fixed frame in
a direction at right angles with the axis and motion of the said rod. .
The portions of the frame which carry the above mentioned ball and socket
joints are conveniently parallel with each and at different levels. The rod
stands normally at an angle with them to enable the two tables to be swung
through a larger augle. The swing of the tables is imperative for the purpose
of the invention, as is also the presence of the two portions of the frame, neces-
sary to carry the ball and socket joints. The ends of the rod inay be forked
to clear the said portions and the latter are shaped so as not to impede the
swing of the tables.
A clamp is provided to clamp the rod to its guide or guides and the latter
to the frame in which they slide.
It may sometimes happen that the working parts of the pantograph and the
mechanism above described will be in each other's way: In that case, tho
rod and its guide are set at any distance from the pantograph, the connection
between the pattern table and the end of the rod is lengthened and made teles-
DiQ77

page_text: copic, a telescopic rod swinging from a ball and socket joint held by a fixed
point, is jointed to the opposite end of the said rod, and a third rod jointed to
the telescopic rod last mentioned is jointed by its opposite end to the ball of
the ball and socket joint of the work table. This third rod works through
a guide or guides working in slides on a fixed frame in the same way as already
described with the first mentioned rod.
Dated thin 2-1 dos of T... 1000
Improvements in Pantograph Engraving Machines.
We, WILLIAM HENRY LOCK, Manager and Secretary of The Linotype Com-
pany, Limited, of 188, Fleet Street, in the City of London, and MARK BARR,
of The Linotype Works, Broadheath, in the County of Chester, 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:-
-
The present invention relates to improvements in pantograph engraving
machines, more especially to those capable of dealing with three dimensions,
length, width and depth, by a swinging and vertically moving tracer and tool.
Referring to the accompanying drawings which are to be taken as part of
this specification and read therewith.
Figure 1 is a perspective view of a machine made according to the present
invention, but with ordinary vertically adjustable pattern and work tables:
Figure 2 is a perspective view of the pivotal block between the stem of the
tool and the telescopic lever:
Figure 3 is a perspective view of the pivotal block between the tracer rod
on the one hand and the rocking bar and tracer rod and tool on the other:
Figure 4 is a perspective view of a machine with swinging pattern and work
tables made according to the present invention.
1 is the base of the machine and 2 is a central standard. 3 is a horizontal
rocking bar supported in bearings 4, 4, carried by the standard 2, and axially
aligned with each. In these bearings it is capable of a reciprocating circular
motion about its longitudinal axis. 5 is the tracer rod and 6 the tracer point.
7 is the tool and 8 the tool spindle. The tracer rod 5 is connected to the bar 3
by being led through a block 9. This block is held to the bar 3 by being
pivotted to it within a cavity 10 by pivots 11, the axial line of which is at
right angles with but in the same horizontal plane as the axis of the rocking.
bar 3. The tool spindle 8 is connected to the bar 3 in exactly the same way
as the tracer rod 5, .., by being led through a block 9 held' to the bar 3 by
being pivotted to it within a cavity 10 by pivots 11", the axial line of which
is at right angles with but in the same horizontal plane as the axis of the rock-
ing bar 3, and therefore parallel with the axial line of the pivots 11 above
mentioned: The lateral motion of the tracer point 6 is conveyed to the tool 7
by means of a link 12, the ends of which are shewn as forked to the more con-
veniently connect with the pivots-13 and 13 of the blocks 9 and 9 respectively.
Referring to Figure 1, 14 is the pattern table fast on a bracket 15 capable
of vertical adjustment on a slide 16 fast to the base 1 and the standard 2, by
means of a traversing screw 17. 18 is the work table fast on a bracket. 19

page_text: capable of vertical adjustment on a slide 20 fast to the standard 2, by means of
a traversing screw 21. The construction of pattern and work-table just
described does not form any part of the present invention.
The tool spindle 8 is carried by and turns in a bearing 28 in the end of a
bracket 29 standing up from the top of the standard 2.
The vertical motion of the tracer point 6 and tracer rod 5 is communicated
to the tool spindle 8 by a telescopic lever 22, 23. This lever is situated above
the rocking bar 3. It has its fulcrum 26 in the said bar by being passed through
a block 24 which is capable of being slid along the portion 22 of the lever and
of being slid longitudinally along slots 25, 25, in the end of the bar 3 duly
forked to receive the said block 24 and slots 25. The position of the fulcrum 26
is adjustable lengthwise of the rocking bar 3, by means of the locking nut 27
on the trunnions, one on each side of the block 24, which engage in the respec-
tive slots 25. The fulcrum 26 above described is always on the side of the tool
spindle 8 opposite to the tracer rod 5. The tool spindle 8 is pivotally con-
nected to the portion 22 of the telescopic lever 22, 23, by being passed through
the block 30 which hangs by pivots 31 down through a hole 32 in the said
portion 22, and enters the bore of the block 9. The block 30 is connected
to the tool spindle 8 by any suitable means which will allow of the said spindle 8
turning freely in it and of also holding the spindle 8, to the block 30 so that
the up and down motion of the latter will take the said spindle up and down
with it. The said means may include a capacity for adjustment along the
length of the spindle. 37 is the tool spindle driving pulley. The tracer rod 5
is pivotally connected to the telescopic lever 22, 23, in the following way. The
outer end of the portion 23 of the telescopic lever 22, 23, has a fork 33. 34 is
a sleeve vertically adjustable upon the rod 5 by a set screw 35 and carrying a
trunnion 36 on each side of it, the two pivotting in the respective prongs of
the fork 33. The axes of the pivots 36 and 31 are parallel with each other
and with those 11, 11 of the blocks 9, 9, already described. .
The present invention includes means by which the pattern table may be
set at any angle with the horizon about a fixed centre and means by which that
setting will effect the setting of the work table at a corresponding angle about
a like centre. Referring to Figure 4, 14" is the pattern table. It is mounted
centrally upon a spindle 37 which is fast to it and which rocks by means of
a ball and socket joint 38 in a bracket 39 standing up from the base 1. The
spindle 37 fits telescopically in a socket 40 standing up vertically from the end
of a rod 41 inclined to the axis of the rocking bar 3 and capable of a to aud
fro sliding motion in guides 42, 42, which are fast on a bar 43 adapted to slide
at right angles with the length of the rod 41, upon V guides 44, 44, fast on the
said base 1. The socket 40 is connected to the respective end of the rod 41
by a ball and socket joint 45. 46 is a spindle centrally fast to and depending
from the work table 18 in the same way as the spindle 37 is fast to and depends
from the pattern table 14. It rocks, by means of a ball and socket joint 47,
in the bracket 48 projecting laterally from the standard 2. The spindle 46
fits telescopically in a socket 49 the bottom end of which is connected by a
ball and socket joint 50 to the respective end of the rod 41 in the same way as
the socket 40 is connected to the respective end of the said rod. 51, 51 are set
screws for holding the bar 43 in its adjusted position upon the V guides 44, 44;
and 52, 52, are set screws for holding the rod 41 in its adjusted position in the
guides 42, 42.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, wo declare that
what we claim is:-
1. The herein before described combination of rooking bar; tracer rod
capable of moving vertically through the said bar and of swinging therein on an
axis at right angles with the axis thereof; tool spindle capable of moving

page_text: vertically through the said bar and of swinging therein on an axis at right
angles with the axis thereof; a link connecting the tracer rod and the tool
spindle; a telescopic lever having its fulcrum on the said rocking bar; a pivotal
connection between the tool spindle and one portion of the said lever and a
pivotal connection between the tracer rod and the other portion.
2. The herein before described combination with the pattern table and the
work table of an engraving machine, of a spindle centrally fast to each table
and depending therefrom; a stationary ball and socket joint carried by the
frame of the machine under each table and through the ball of which each
spindle is respectively made fast; a socket in which the respective spindle can
telescope; a rod having the two sockets above mentioned connected to its res-
pective ends by ball and socket joints; guides in which the said rod turns;
and guides at right angles with the said rod and upon which the said guides
and rod can be moved.
3. The herein before described combination of rocking bar; tracer rod capable
of moving vertically through the said bar and of swinging therein on an
axis at right angles with the axis thereof; tool spindle capable of moving
vertically through the said bar and of swinging therein on an axis at right
angles with the axis thereof; a link connecting the tracer rod and the tool
spindle a lelescopic lever having its fulcrum on the said rocking bar; a pivotal
connection between the tool spindle and one portion of the said lever; a pivotal
connection between the tracer rod and the other portion; pattern table and
spindle centrally fast thereto and depending therefrom; work table and spindle.
centrally fast thereto and depending therefrom; stationary ball and socket
joint carried by the frame of the machine under each table and through the
ball of which each spindle is respectively made fast; a socket in which the
respective spindle can telescope; a rod inclined to the above mentioned rock-
ing bar and having the two sockets above mentioned connected to its respective
ends by a ball and socket joint; guides in which the said rod turns; and guides
at right angles with the said rod and upon which the said' guides and rod can
be moved..
Dated this day
CHAS. S. WOODROFFE,
188, Fleet Street, London, EC., Chartered Patent Agent.