IMPROVEMENTS IN APPARATUS FOR PLANING AND SHAPING MACHINES
Year: 1884

page_text: I WILLIAM ALLDAY Junior of Branston Street Works Birmingham County of
Warwick Engineer do hereby declare the nature of my said invention for
IMPROVEMENTS IN APPARATUS FOR PLANING AND SHAPING MACHINES to be as
follows:-
The improvements relate generally to apparatus for planing and shaping
machines arranged for the simultaneous planing or forming of rounds and hollows
of true circles, in their longitudinal direction, of any degree less than, and up to
one half of a complete circle with tools so arranged that cutting is effected both at
the forward and backward motion of carriage or tool-block; that is to say that
while one or more tools are arranged to cut rounds of any degree at one part of the
reciprocating motion one or more tools are arranged to form hollows at another
part of the motion. The improvements have particular application for forming
the revolving parts or abutments of rotary-blowers-engines or pumps but more
especially to the revolving parts of what is known in the trade as "Roots
Blowers"-The sides of these revolving parts are half circle rounds, the central
portion consists of two hollows (in cross section part of a true circle) one on each
side of the central axis and by the peculiar arrangement of tool boxes and mode of
working, the piece from which this revolving part is to be formed may be so fixed
upon the machine that one half of each round and one of the hollows may be
formed at one sitting. These parts may be formed in any single length less than the
extreme travel of carriage or tool-box or a series of short lengths may be formed
at one operation by placing the pieces one after another but all within the extreme
limits of motion. One distinctive characteristic of these improvements is in such
an arrangement of parts that the one hollow and the half of each of the two
rounds (one half of the complete revolver) may be finished simultaneously with
only one fixing or setting.
Another peculiar feature of these improvements is that rounds and hollows of
different diameters and radii may be formed with great accuracy from one pattern
or guiding part for the tool-boxes or slides for each round and one for the hollow
and all permanently fixed upon one cross bar, or its equivalent.
The tool boxes or slides are caused to move over the guiding ways by means of
worm wheel, links, ratchets, or chains, but preferably by worm wheel and chains
ctuated with cross shafts or screws and with suitable arrangement for attachment
o the tool boxes and for the adjustment of the tension of the chains.

page_text: The various tool boxes are arranged with automatic feed and in the usual
manner for change of speed The tools in the several boxes can be readily removed
for sharpening and loosened for exact adjustment.
That the distinctive features of these improvements may be clearly understood
reference is had to the accompanying drawing.
Figure 1-Is a transverse elevation of the improvements as applied to a planing-
machine shewing tool boxes and guide ways also a partial view of planing machine
Table with piece to be operated upon supported on packing block.
Figure 2-Partial end view of parts shewn in "Figure 1."
Figure 3-Section on line C. D of "Figure 1."
Figure 4-View of back tool box for cutting the hollows rotated by worm and
worm wheel, actuating parts, partly in Section.
Figure 5-Plan of tool holder.
Figure 6-Section on line A. B. figure 1 through saddles, and showing the form
of guide way, in cross section.
Figure 7-Worm and worm bracket attached to back of saddle C.
Figures 8-9-10-11 and 12 detached plans of various parts.
a
table of planing machine.
b cross frame mounted on the usual plan of uprights.
6 guides for supporting saddle C.
C
saddle with guide ways over which tool boxes are moved.
d tool boxes for tools cutting rounds.
e chain wheels (two not shown).
f chain attached to back of tool box d.
g
h
i
worm wheel for working chain wheel.
worm for driving worm wheel.
bracket attached to saddle and which maintains worm and worm wheel in
their relative positions when saddle is changed for rounds of different diameter.
j casting or piece to be operated upon.
packing block upon which is fixed.
k spindle for working worm and chain wheels actuated in the ordinary
manner.
Z saddle on back of cross frame "C" carrying tool box and tool for cutting
hollows moved up or down by screw m³ for forming hollows of different radii.
0 tool box for tool for forming hollows rotated by worm wheel attached to
back of box,
worm spindles for worm that rotates worm-wheel attached to tool box "m."
p horizontal spindle actuated in the customary manner and transmitting
motion, to tool box m, through spindle p¹ and o.
It will be seen that the productive power of the machine is very much increased
by the arrangement of tools whereby cutting is effected both at the forward and
backward motion while the required parts are reduced to a minimum by the
arrangement for simultaneously producing rounds and hollows of various diameters
and radii with one set of patterns while speed and accuracy are gained by the
arrangement whereby the revolving part is completed with only one change from
the first position.
1004

page_text: Improvements in Apparatus for Planing and Shaping Machines.
I WILLIAM ALLDAY Junior of Branston Street Works Birmingham in the
County of Warwick England Engineer do hereby declare the nature of my said
invention for IMPROVEMENTS IN APPARATUS FOR PLANING AND SHAPING MACHINES
and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement:―
The Improvements relate generally to Apparatus for Planing and Shaping
Machines arranged for the simultaneous Planing or forming of rounds and hollows
of true circles in their longitudinal direction of any degree less than and up to one
half of a complete circle and with tools so arranged that cutting is effected both at
the forward and backward motion of carriage or tool block, that is to say that
while one or more tools are arranged to cut the rounds of any degree at one part of
the reciprocating motion one or more tools are arranged to form hollows at another
part of the Motion.
The Improvements have particular application for forming the revolving parts
or "abutments" of rotary-blowers, engines or pumps but more especially to the
revolving parts of what is known in the trade as "Roots Blowers." The sides of
these revolving parts are half circle rounds, the central portion consists of two
hollows (in cross section part of a true circle) one on each side of the central axis
and by the peculiar arrangement of tool-boxes and mode of working, the piece
from which this revolving part is to be formed, may be so fixed upon the machine
that one half of each round and one of the hollows may be formed at one setting.
These parts may be formed in any single length less than the extreme travel of
carriage, or tool box, or a series of short lengths may be formed at one operation,
by placing the pieces one after another but all within the extreme limits of
motion-One distinctive characteristic of these improvements is in such an arrange-
ment of parts that the one hollow and the half of each of the two rounds (one half
of the complete revolver) may be finished simultaneously with only one fixing or
setting.
Another peculiar feature of these improvements is that rounds and hollows of
different diameters and radii may be formed with great accuracy from one pattern
or guiding part for the tool-boxes or slides for each round and one for the hollow
and all permanently fixed upon one cross bar or its equivalent.
The tool boxes or slides are caused to move over the guiding ways by means of
worm wheel links ratchets or chains but preferably by worm wheel and chains
actuated with cross shafts or screws.and with suitable arrangement for attachment
to the tool boxes and for the adjustment of the tension of the chains.
The various tool boxes are arranged with automatic feed and in the usual
manner for change of speed. The tools in the several boxes can be readily removed
for sharpening or loosened for exact adjustment.

page_text: Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed I declare that what
I claim is
1st The general arrangement and application of Apparatus to a planing or
Shaping Machine whereby the hollows and rounds of a rotating piston may be
simultaneously and accurately formed at two settings or with only one change
from the first position substantially as described and shewn.
2nd The general arrangement and application of Apparatus for planing and
Shaping rotating pistons having hollows and rounds whereby cutting is effected
both at the forward and backward motion of the table of a planing Machine or of
the cutter-bar of a Shaping Machine substantially as described and shewn.
3rd In planing or Shaping Machines arranged for cutting hollows and rounds
the application in combination of chain and worm wheel to cause the movement of
the respective tool blocks over or around suitable guide ways, substantially as
described and shewn.
DL