Year: 1888

page_text: Date of Application, 8th Feb., 1888
Specification Accepted, 12th Oct., 1888
We ERNST RUF Mechanician and WILHELM KUMPFMILLER, Merchant of Munich
in the Kingdom of Bavaria 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 :-
This invention relates to lathes and consists in a new or improved apparatus which
may perform at the same time the functions of sliding puppet and of a simple double
or triple tool rest or simply of a slide rest for one or more tools.
Referring to the annexed drawings Fig. 1 is a perspective view of the improved
apparatus. It consists chiefly of a sliding puppet A replaceable by a slide rest
hereinafter shown which may be adjustable in its height as shown in Fig. 1. and a
lateral slide rest B changeable to either side each part being applicable independently
of the other the part A being simultaneously sliding puppet and tool holder or rest
while the part B forms at the same time a slide rest.
To illustrate the functions of the two devices we will describe first the device A
with certain modifications thereof and subsequently the device B.
The device A may be so arranged as to work with or without exact control thus,
simply by lever pressure or screw spindle.
According to requirement it may be independent of the part B and fixed or guided
in the direction of the live spindlo.
Fig. 2 is a plan of a preferred form of the combined puppet and slide rest taking
the place of A in Fig. 1.
Fig. 3 is a cross section along line I 1 and,
Fig. 4 a longitudinal section along line II II of Fig. 2.
The tool holder or slide a is lodged in the sliding puppet so as to be horizontally
displaceable therein and the drill stock S is adapted to be displaced on the bar S¹
secured to the puppet and to be fixed in position by means of a screw.

page_text: As shown in Fig. 6. the drill stock S may also be simply secured to the body of
the puppet. The tool slide which is intended to receive any required number of tools
is a hollow casing supported on one side by the puppet and on the other sido (Fig. 2)
by sleeves a¹ passing over rods b. Said rods are screwed into the rear main wall of
the sliding puppet and have projections which determine the displacement of the
tool slide relatively to the blank to be turned.
The tool slide may be moved as follows, On the lateral supports c of the puppet
is pivoted by means of the pin or shaft d the double or forked lever / (the two arms
being connected by cross piece ¹ with one handle).
The tool slide a carries, one on each side ears a² each of which bears a pin a³
engaging in a curved slot 1 in the respective arm of the lever h.
When the lever is moved upward or downward the tool slide is shifted forward
or backward in the puppet.
The determination of the forward movement is regulated by the projections on the
guide pins b. To allow the extent of the displacement to be ascertained and thus an
exact control to be made of the turning an index e¹ is attached on the upper part of
the fork e anda.millimeter scale on the surface of the puppet. The fork e. (Figs. III
and LV sections) is guided with its arms above and below the tool holder in the franc
of the puppet and is connected behind with the tool holder a by a pin e² or in any
other suitable manner.
Through the fork passes the screw spindle fabuting on the face of the puppet and
determining the rearward movement of the tool slide. The tool slide can therefore
be moved in two different mannors firstly by lever h. secondly by spindle f the lever
being adapted to be disengaged by pulling out the pins a³.
The tool slide a carries, on each side that is to say on the left and on the right of
the lateral surfaces of the puppet or of the lever h two projecting pieces a* with slots
for the holding of shanks of tools and set screws a' for fixing said shanks. These
projecting pieces participate in the movement of the tool slide a. To allow however
also of a movement of the central tools independent of these lateral tools when
desired, guide plates m and m are screwed to the lateral surfaces of the sliding
puppet, said guide plates or the lateral surfaces of the puppet being provided with
grooves for the passage of the tools 1° and each of said guide plates carrying a
set screw m¹.
If therefore the tools are intended to be employed independently of the tool slide
the screws a³ are loosened and the tool is fixed in the required stationary position by
means of screw m². The projecting pieces at of the tool holder, then slide back and
forth freely over the tools 1º.
The material to be turned is guided by the sliding puppet itself. The guide
plate mo or the body of the puppet is furnished with a head piece g. Into the latter
is introduced and held by a screw a tube g¹ with a diameter of bore corresponding
to the diameter of the blank to be turned (Fig. 2.
The further guiding is supplied by the bore a° of the puppet. Opposite the drill
stock g another head and exchangeable tube as at g may be provided.
If therefore the material to be turned has a smaller diameter a tube with
correspondingly smaller bore is introduced etc.
A second exact centering may be obtained by use of the above mentioned drill or
spindle stock S displaceable on the guiding bar S¹.
Said spindle is hollow and carries likewise an exchangeable tube g³ into which if
required a centre drill or cutter may be introduced. The hollow stock is longitudinally
adjustable as abovesaid and the turned and cut off articles pass along therein and
fall out at the crank end of the spindle. The chips and shavings fall through
suitable slits.
Figs. 5 to 8 show certain modifications in which the arrangement described above
may be considerably simplified and the capacity of the device increased. This being
the device shown in Fig. 1. The carriers a¹ of the tool slide or slides a are here
'connected in pairs by, and moved by spindles_b³.
The spindle 6 replaces (as shown by fig.. V-cross section through the centre of the

page_text: stock) the guide bolts 6 and also the guide tubes etc., the actual tool slides or sleeves a
are displaceable in the blocks a¹ and adapted to be fixed by means of set screws a.
By this construction also the fork e is rendered superfluous as the movement of the
tool slide can be exactly determined in each direction.
Referring to Fig. VI. the sleeves a or the tool slides of the above described
apparatus are moved and guided exactly as the tool slide a and can work in
connection with the latter as well, or be employed separately. They are formed as
a cylinder at having a rectangular axial slot in which the shank of the tool is secured.
The tool may thus be set to operate in desired manner on the blank.
The tool slide a and rotary tool slide a are arranged laterally along the axis of
rotation of the blank and perpendicular thereto (see Figs. VI. and VII. sections) or
they may also be arranged above and below, as shown in Fig. VIII.
The screw spindle & engages in a threaded socket in the body of the puppet
(See Fig. V) and the blocks a are secured, loosely so that the ends of the spindle may
revolve in them, the one tool slide or rotary tool slido is thus advanced by revolution
of the spindle, while the opposite one is at the same time shifted back therefore one of
the tools is set in action, the other disengaged. The movement is determined as
mentioned above by the abutment of the blocks a respectively against the face of the
puppet the slides a and a having been previously correspondingly introduced into
said blocks and fixed by the set screws a. If however the blocks a¹ are engaged by
means of screw threads with the spindle (Fig. VIII) and the spindle moves smoothly
in the body of the puppet the tool slides can be simultaneously displaced from, or
towards each other by forming the said spindle with counter screw threads for each
block.
The displacement instead of hy spindles, may of course also be effected by levers
in connection with the blocks especially if a rapid shifting to and fro thereof is
required.
The blank to be turned is guided as described above, by exchangeable head pieces
or if desired by the spindle S mundo, in such case, hollow for the purpose.
For moving the puppet forward or rearward a toothed pinion upon shaft, journalled
in the base of the puppet gears into a rack secured on the bed of the lathe or on the
special bed of the improved puppet said shaft having a quadrangular head for receiving
a crank whereby the forward and rearward movement of the puppet can be effected at
pleasure. This movement may also be attained by a screw spindle. The clamping of
the puppet is effected by nut and bolt ¹ (Fig. V) or the like.
To allow the movement of the sliding puppet to be exactly ascertained a scalo m², is
placed upon the bed as shown by Fig. VII. and if desired a vornier m³ is also arranged
on the sliding puppet.
Fig. IX is a perspective view of the lower part B as arranged on the contrary side
of the bed. The bed, if desired revolvable about a pin or bolt passing through a
circular hole has two prismatic grooves 2020. The main slide or the sliding
puppet A is guided upon the central bar a formed between said grooves. This main
slide (Fig. I cross section Fig. ✗) may serve as tool rest or holder, it may be driven
by a spindle journalled along the bed, said spindle being actuated by hand or
machine power and engaging in a boss connected by a web y passing through a
groove in the bed at 2. The slide y carries a worm wheel y gearing with the
worm y. The wheel y' is carried upon the screw threaded bolt y in the base of the
main slide, said bolt heing provided with conical head and a recess y* for introduction
of the tool the latter being fixed by nut y and cap y. Such holder is capable of
securing tools at any angle in a horizontal plane." Laterally of the main slide is
arranged a parallel slide d¹ the face of which just passes by the side surface of the
main slide.
The guiding of the lateral slide is such that the Intter can be removed from groove a³
and introduced into the groove a that is to say on either side of the main slide.
The prismatic bars
of the bed a. The bed
are formed symmetrical and of equal size one on each side
is not the latho bed proper but is attached thereto by a bolt

page_text: 16
passing through. The lateral slide d' is elongated in a direction laterally away from
the main slide and carries with similar bar or shear guiding the cross slide with
clamping plate ¹ with screw bolt or an arrangement as described above for fixing the
tool in any suitable manner. Said slide u is adapted to be moved to and fro on its
bed by a spindle . It forms therefore with its bed a lateral slide rest. Such a
slide rest may of course also be simultaneously employed on the other side of the bed.
By elongating sufficiently also the base of the slide u to the rear the slide u may be
shifted so far over the main bed as to arrive on the other side thereof and act as a
slide rest on the other side without necessitating the removing of its slide bed thereto.
According to the nature of the work to be executed each slide can be employed in
any direction independently or in connection with the other. The slide may for
instance be connected with tho slide y as one by means of a suitable coupling etc.
In such case both can be moved together by spindle i. The bore or hole y' in the
main slide corresponds to the head of the spindlo 2 of the lateral slide and is intended
to receive the same when the lateral slide is placed close up to the side of the main
slide.
"
If two lateral slides are employed, they can be moved at the same time towards or
from each other on their respective beds by a coupling connecting their spindles, one
spindle having a right hand and the other a left hand screw thread.
It may be seen from the above description that already the the main slide bed may
support a sliding puppot or a main slide rest and at the same time, but independently
thereof a lateral slide rest or rests.
This device as mentioned above replaces the sliding puppet of lathes and is at the
same time a simple, double, or triple slide rest.
The difforont slides can be moved with their tools by one or more spindles (for
instance) at the same time in one or in different directions.
Therefore it is possible, to turn, to bore and to cut screws simultaneously with this
apparatus without necessitating any tool to be changed.
The tool slides may be some, or all coupled together and moved by lever or spindle
back and forth or up and down simultaneously or singly.
The determination of these movements necessary for wholesale manufacture is
effected by set screws in the cheek pieces so that a rapid and secure adjustment of the
tools may take place.
--
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 :-
In lathes
1. The combination of a slide bed having a central bar or shears, a puppet or rest
adapted to slide theroon, lateral bars or shears on oach side of said bed, a lateral slide
adapted to slide on said side shears or bars and having itself shears or bar together
with a lateral slide rest adapted to move thereon and to be coupled with the main slide
rost or sliding puppet.
2. In a slide rest the combination of worm wheel y¹ worm y² bolt y³ slotted for
reception of the tool and nuts or equivalents for fixing same substantially as set forth.
3. The combination with a puppet of a tool holder a displaceable therein, lever h
detachably attached to said holder for the movement thereof, and bolts with stops b¹
for determining such movement as set forth.
4. The combination with a puppet of a tool holder guided therein, said holder having
projections a slotted for passage of tools directed in slots of the sliding puppet, and
set screws in puppet and holder for fixing said tool or tools as set forth.
5. The combination with a puppet of cylindrical or other tool holders guided therein
said holders carrying blocks, and screws, spindles traversing said puppet and blocks
for movement of the tools as set forth.
6. The combination of a puppet having a tool holder sliding therein lover and
pins with projections as set forth, of fork e and spindle with or without vernier
or other scale on or in connection with said fork.

page_text: 7. In a sliding puppet having tool slides as set forth the combination with a head
to said puppet of exchangeable tubes g for the purpose set forth.
8. In a sliding puppet having tool slides as set forth the combination with said
puppet of a hollow spindle S and exchangeable tubes therefor substantially as and for
the purpose set forth.