Finishing Engine Cylinders and the like
Year: 1885

page_text: Finishing Engine Cylinders and the like.
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"
I, WILLIAM PHILLIPS THOMPSON, Fel. Inst. P.A. of the Agency for Foreign
Patent Solicitors, 6 Lord Street, Liverpool, in the County of Lancaster, and
323 High Holborn, in the County of Middlesex, Civil Engineer, do hereby
declare the nature of the said invention for "A NEW OR IMPROVED MACHINE
FOR BORING, DRESSING, AND FINISHING ENGINE CYLINDERS AND THE LIKE
(a communication from abroad by Walter J. Muncaster and Merwin M.Kaig
both of Cumberland, County of Alleghany, State of Maryland, United States
of America, Manufacturers) and in what manner the same is to be performed,
to be particularly described and ascertained in and by the following statement :-
This invention relates to lathes or machines for boring, dressing and finishing
engine and pump cylinders, and it consists in various features and details of
construction hereinafter explained, by which the speedy and accurate adjustment
of the cylinder is accomplished, preparatory to the operations mentioned. It
further relates to the manner of and devices for feeding the cutting tools along.
Figure 1, of the drawings, is a front elevation of the machine, showing &
cylinder in section, in position to be operated upon.
Figure 2, a top plan view.
Figure 3, an end elevation.
and
Figures 4, 5, 6, 8 and 9, detail views of parts hereinafter referred to;
Figures 7 and 10, views showing modifications of the machine.
Prior to this invention much difficulty has been experienced in boring, dressing
and finishing cylinders, and a great deal of time has been required to adjust
The dressing
the cylinder preparatory to performing the operations named.
or finishing of the ends has hitherto been performed as a separate and inde-
pendent operation, requiring additional time and labor, and involving additional
expense,

page_text: This invention obviates the difficulties heretofore encountered, and enables the
user to accomplish the work easily, quickly and in a thorough manner.
The construction of the machine will be readily understood in connection with
the drawings and the following description.
A. indicates a firm and substantial base, preferably set in masonry and formed
with longitudinal guiding ribs or ways a.
B and C indicate two heads or stocks mounted upon the base A and guided by
the ribs or ways a,-the heads being movable lengthwise of the bed.
D indicates a screw shaft journaled in suitable supports b, c, on the base A, and
having right and left threaded portions d and e, which enter correspondingly
threaded holes in the heads or stocks B, C, and serve to move the heads toward
or away from each other as the shaft D is rotated in one or the other direction.
The end of the shaft is squared to receive a crank or handle by which to turn it,
and is held against longitudinal movement by collars or bosses f, at both sides of
the support b.
The screw shaft D serves also to hold the heads rigidly in any position to which
they may be adjusted.
Each head B, C, is formed near its inner end with vertical faces g, on the front
and rear, sides and these faces are furnished with vertical slots h for a purpose that
will presently appear.
E indicates a vertically adjustable bed or table, having horizontal arms i which
extend along the front and rear faces of the heads or stocks B and C, bearing
against and guided by the upright faces g.. These arms i are formed with longi-
tudinal slots, through which bolts & pass into the vertical slots h, said bolts serving
to hold the bed or table E at any required vertical adjustment, and also to bind the
heads or stocks and the table or bed firmly together to prevent play or vibration
while the machine is in operation.
The table E is further supported by four vertical screw stems F, F, and G, G,
journaled or swiveled in the table and screwing into threaded sockets in the base,
and by turning these screws the bed may be raised or lowered as required when
the bolts are loosened.
.
Ordinarily it is desired that all these screws be turned simultaneously and
equally, in order to raise the bed bodily without inclining or tipping it, and for
this purpose each screw is provided with a bevel gear or pinion, and connect the
several stems by shafts H, I and J, each carrying two bevel pinions m. The
shafts H and I are journaled in the bed E and have their front ends extended
outward in front thereof and squared to receive a crank or handle by which
to rotate them.
The cross shaft J connects the gear of one of the screws F, F, with that of one of
the screws G, G, while the shafts H, I, connect the two screws of each pair, as
illustrated in figure 4.
The cross shaft J is carried at one end in a pivoted block or support n, bung
upon the shaft I, and is supported at its other end by a vertically movable block o,
resting at its lower end upon an eccentric p, carried by a short shaft q, the end of
which projects outward beyond the front of the bed E and is furnished with a
crank or handle r. Thus arranged, the shaft I may be raised and lowered and the
screws F and G caused to act independently or in unison, as required.
This is an important provision because it often happens that the form of the
cylinder and its attendant parts necessitates the raising and lowering of one end of
the bed or table independently of the other.
Upon the bed or table E are mounted two cross slides K, Figs. 1 and 2, each
provided with a traversing screw. L for moving it across the bed or table, and each
formed with a T-slot or groove, 8, to receive bolts t by which to fasten the cylinder
upon the slides.
As shown in figures 1 and 2 the head or stock B is furnished with a hollow arbor
or spindle M, upon which is secured a large gear wheel N.

page_text: Through the hollow arbor or spindle a boring bar or shaft O passes, said bar or
shaft having a key seat u, planed in it from end to end, to permit the bar to slide
lengthwise through the arbor and over a key seated in said key seat and in
the hollow arbor, and pressed firmly into the seat or loosened, as required, by set
screw w.
.
The boring bar or tool-shaft O has a tenon formed on its end, to enter a socket
in a second bar or shaft O', journaled in the head or stock C and forming a
continuation of bar O,-a transverse key or pin x passing through the two and
locking them firmly together, as shown in figures 1, 2 and 8.
The same key serves to secure upon the shaft a radial arm or feed stock P,
containing a feed screw y, having a star-wheel Q at its outer end and a tool post T
moved by said screw. The arm P is offset from the hub or collar which encircles the
shaft, to permit the hub or boss of the boring tool R to pass beneath it.
S indicates a second radial feed stock or arm, also provided with a feed screw y
having a star wheel Q at its outer end, and with a tool post or holder moved by
the screw.
The boring head or tool R. is divided in a plane parallel with the axis of the
boring shaft or bar, into two sections, which are drawn and held together by
wedges or keys z passing through eyebolts U, projecting from one section through
ears formed upon the other, as shown in figures 1 and 9.
The boring tool or head R is moved lengthwise upon the bar or shaft O by
a screw V. seated and journaled in a groove W therein, and projecting beyond the
outer end of the bar or shaft, where it is furnished with a star wheel X and crank
or handle Y.
The star wheel ✗ of screw V is given a partial rotation at each revolution of the
boring bar or shaft, by engagement with a stationary arm or stop Z placed in
its path.
The screw V and its star wheel X being eccentric to the boring bar or shaft, said
star wheel will encounter the stop Z during a small portion of each revolution,-the
period being lengthened or shortened by setting the stop nearer to or further from
the axis of the wheels.
In like manner the set screws y, y, of the cross feed stocks P and S are given a
slight turn at each revolution of the boring bar or shaft, by the engagement of
their star wheels Q with fixed stops a¹ on the bed or table E.
The stops a¹ and Z require setting or adjustment for each different size of
cylinder and to suit the work to be performed on each.
Motion is imparted to the boring bar through gear wheel N, from an elongated
pinion A¹ having a rib or spline b' to enter the groove c¹ of the shaft B¹ upon
which the pinion is mounted.
The shaft B¹ passes through an upright or standard d bolted to the bed or
base A, and is held against end play by a collar at one end of said standard and
by a pulley or cone C¹ at the other side thereof, or in any other usual manner.
The shaft also passes through an arm or bracket e¹ bolted or otherwise made fast
to the head or stock B and extending outward beyond the pinion and finally passes
through a hole or opening in the stock or head so that as the stock or head
is moved along the base, the pinion is carried with it, but the shaft is not moved.
The purpose of elongating the pinion A¹ is to permit the gear wheel N to move
back and forth a limited distance without becoming disconnected from or out of
mesh with the pinion; and this movement is for the purpose of permitting the
boring bar (which is locked to the hollow arbor or spindle M while the machine is
operating), to be moved lengthwise while rotating,-to dress off the periphery of
the cylinder ends.
To effect this longitudinal movement of the boring bar or shaft, a screw D¹ is
employed, the end of which is swiveled in the outer end of section O¹ of the boring
bar or shaft, and the body of which passes through a threaded hole in a cross
head E, held by posts or rods F¹ at a distance from the end of shaft Q₁:

page_text: The screw is furnished with a hand wheel G₁ by which to turn it, and with a
jam nut H also in the form of a hand wheel, by which to lock the screw against
being turned by the rotation of the boring bar or shaft.
The manner of adjusting and operating the machine is as follows :-
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The bolts are loosened and the shaft D is turned to move the heads B, C, to
the proper distance apart; the set screws w are loosened, the pin is driven out,
and the boring bar or shaft is withdrawn through the hollow spindle M until its
end is flush with the face of cross feed arm S or nearly so.
The cylinder to be bored is then placed upon the slides K, and loosely secured
thereto by the fastening bolts, the table or bed E is raised horizontally in line with
the axis of the boring bar or shaft O, and the slides K are moved to bring said axis
vertically in line. When thus brought into position the cylinder is firmly clamped
upon the slides and is then ready for boring, dressing and finishing.
The boring shaft O is then run forward to the section O¹ and the key is
inserted to lock the two sections together, the boring tool or cutter is secured
upon the boring bar or shaft, the cross head S is moved up to the end of the
cylinder, and the set screws w and are tightened. The machine is then set in
motion, and at each revolution of the boring, bar the cutting tools are advanced a
given distance, until the work of boring and of facing the ends is completed.
To dress the periphery of the cylinder ends, the tools or arms P and S are set at
the required distance from the axis of the boring bar or shaft, and as the shaft
rotates it is moved lengthwise by screw D¹ controlled by hand wheel G¹, until the
operation is completed.
The cross feeds P and S may either or both be formed with two or more arms, as
shown in figure 10 each carrying a different kind of tool or tools differently
adjusted, so that the operations of roughing and dressing, or roughing, dressing
and finishing may be simultaneously performed.
With the machine constructed and operating as thus set forth, work may be
performed rapidly and with great accuracy.
One head only may be made movable if desired, but it is preferred to make both
adjustable.
It is not essential that the sliding or independent section 01 of the boring bar or
shaft be provided, as the same result may obviously be secured by making the tool-
carrying arms P and S adjustable by means of a screw or other feed device, in line
with the axis of the boring bar as indicated in figures 7, and 10.
Having now particularly described and ascertained the nature of the said
Invention, and in what manner the same is to be performed, as communicated
to me by my foreign correspondent, I declare that what I claim is
1. In a cylinder boring or dressing machine the combination of base A,
heads B, C, vertically adjustable table E, longitudinally-movable bar O, and
cutter R carried by said bar.
2. In a machine for boring cylinders, the combination of a vertically-adjustable
table E, alides K, K, adjustable transversely upon said table; heads B, C, one or
both adjustable relatively to the table, a boring arbor or shaft O mounted in and
longitudinally adjustable through the head or stock, and a boring head or tool
secured to said shaft or bar.
3. The combination substantially as described and shown of base A, heads B, C,
provided with slots h, screw shaft D having right and left threaded portions d, e,
bed or table E provided with slots j, bolts & passing through slots h and j, hollow
arbor M. carried by head or stock B and provided with gear wheel N, boring
bar 0, 0¹, cutter R, shaft B¹, and pinion A¹..
4. In combination with base A, heads or stocks B, C, and boring bar or
shaft O; O¹, screw shaft D adapted and arranged to advance and recede the heads
substantially as set forth.
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5. In combination with base A and heads B, C, boring arbor of shaft 0; 0³; and
vertically adjustable table E.

page_text: 6. In combination with base A, heads B, C, provided with slots h, table E
provided with arms i extending along the sides of the heads and provided with
Blots j and bolts & passing through the slots and serving to bind the heads and bed
or table together.
7. In combination with base A, heads B, C, and boring bar O, bed or table E and
adjustable screws F, G, for said table.
8. In combination with base A, heads B, C, and boring bar O, table E, vertical
screws F, G, provided with pinions l, and shafts H, I, J, provided with pinions m,
all substantially as described and shown.
9. In combination with heads B, C, and a boring shaft carried thereby, a
vertically-movable table and screws F, G, at each end of said table. adapted
to be turned simultaneously or independently to raise the table bodily or at
one end only.
10. In combination with heads B, C, and with a boring bar carried thereby,
table or bed E, right and left screws F'and G, provided with pinions 1, cross
shafts H I provided with pinions m, connecting the screws F, G, pivoted at one
end and carried in an adjustable block o at the other end, and an eccentric p for
raising and lowering said block.
11. In combination with base A and heads or stocks B, C, the stock B adjustable
upon the base, hollow arbor or spindle M carried by head B, and provided with
gear N, boring bar O, passing through said arbor or spindle, standard d' mounted
upon base A, grooved shaft B¹ journaled in said standard and extending into
head B, pinion A¹ provided with a rib to enter the grooved shaft B¹ upon which it
is mounted, and arms e¹ attached to head B and serving to move pinion A¹ as the
head is moved.
12. In a cylinder boring machine, the combination of a base, heads mounted
upon said base, and a boring bar made in two sections, one section mounted in each
head, and one adapted to slide through the head in which it is mounted, whereby
the boring bar may be withdrawn, to permit the placing of a cylinder between the
heads.
13. In combination with base A and heads B, C, a boring bar composed of
sections 0, 0¹, one provided with a tenon and the other with a socket to receive
the tenon, and a pin or key passing through the interlocking ends and serving to
unite them as set forth.
14. In combination with heads B, C, boring bar O, and cross feed arm S secured
to the boring bar as and for the purpose set forth.
15. In combination with heads B, C, boring bar O, 0¹, provided with boring
head R, and with cross feed arm P, offset to permit the hub of the cutter to pass
under it.
16. In combination with heads B, C, hollow arbor or spindle M mounted in
head B, boring bar O provided with groove or key seat u, key v seated in said
groove and in the hollow arbor, and set screw w bearing upon said key substan-
tially as shown.
17. In combination with heads B, C, boring bar O provided with groove W,
screw V seated in said groove, and boring tool or head R mounted upon the
boring bar and engaged with the screw substantially as described and shown.
18. In combination with heads B, C, and boring bar O, divided cutter or boring
head R.
19. In combination with heads B, C, boring bar O, feed screw V seated in said
bar and provided with star wheel X, boring head or cutter R mounted upon the
bar O and engaged with the screw, and stop Z located in the path of star wheel X
and adapted to partially rotate the same at each revolution of the boring bar.
20. In combination with heads B, C, and table or bed E, boring bar O, a radial
arm mounted in said bar and provided with a movable tool post or holder, a feed
screw y for moving said tool holder, a star wheel fixed upon said screw, and
a stop al placed in the path of the star wheel and serving to turn the wheel and
screw as the radial arm moves past it,

page_text: 21. In combination with base A, heads B, C, and elongated pinion A¹ carried by
head B, hollow arbor M journaled in head B and provided with gear wheel N,
boring bar O passing through arbor M, extension 0¹ mounted and arranged to
rotate and slide in head C, screw D¹ swiveled in the end of extension O¹, and
a radial tool-carrying-arm secured upon the 'boring bar all substantially as
described and shown.
22. In combination with heads B, C, hollow arbor M and boring bar O provided
with a radial tool-carrying arm, means substantially such as described and shown
for imparting a longitudinal reciprocation to the boring bar while the same is
rotating.
23. In combination with heads B, C, and table E, boring bar O provided with
tool-carrying arms P, S, having tool posts or supports and tools adapted to be
adjusted in line with the axis of the boring bar.
Dated this 7th day of September 1885.
WP. THOMPSON & Co.,
Agents for the Applicants.