Improvements in or relating to Turning Lathes and similar Tools.
Year: 1889

page_text: The decision of the Comptroller-General, of the 10th day of March 1894, allowed;
under Section 18 of the Patents, &c. Act, 1883, an Amendment of this
Date of Application, 20th May, 1889-Accepted, 17th Aug., 1889
COMPLETE SPECIFICATION (AMENDED).
Improvements in or relating to Turning Lathes and similar Tools.
A communication from WILHELM VON PITTLER, of Gohlis, near Leipsic, in the
Empire of Germany, Engineer.
I, ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex,
M.I.M.E., 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 :-
which
The present invention relates to an apparatus for working metal and which is
arranged or constructed in such a manner that turning, beading, boring and a variety
of other operations can be effected by means of the apparatus, which is principally
destined for the use of smaller tradespeople such as locksmiths, mechanics, watch-
makers, and the like but which can also be employed in factories.
Besides the variety of its purposes this apparatus is further distinguished by its
driving mechanism. In view of its destination for small tradespeople and the like,
the apparatus is constructed portable so that it can be fixed to the bench by screw
clamps or simply held between the jaws of a vice.
In the accompanying drawings;-
Fig. 1 represents a side elevation of the machine partly in section, the guide bar.
or bed preferably of prismatic section.
Fig. 2 represents in plan the driving mechanism and the support for the work
hereinafter termed the "work support.'
Fig. 3 represents an end view of the end of the apparatus opposite to that at
which the driving mechanism is situated.
Fig. 4 represents a transverse section of the work support showing the mode of
fastening it to the guide-bar or bed of the apparatus.
Fig. 5 represents a modification of the apparatus in side elevation and partly in
section, the guide bar or bed being here cylindrical instead of prismatic.
Fig. 6 represents an end view of the apparatus from the side where the driving
mechanism is situated.
Fig. 7 represents the arrangement of the work support when the apparatus has a
cylindrical guide bar or hed.
One of the principal parts of the apparatus is ;-
The guide bar or bed A which preferably of cast iron if it is prismatic. It is
provided with a foot or base A' provided with arrangements to fix the apparatus on
the bench or for the apparatus to be fixed in a vice. On the upper side of this
base A¹ is mounted the frame B with the driving mechanism M.
The prismatic guide bar or bed A is hollow at its underside and in this groove
or recess is placed a screw-threaded spindle C which is provided with a square
square head
head c at its end beyond the end of the guide bar or bed A. On this

page_text: may be fitted a crank handle for turning the spindle C. This spindle C could
however also be turned by suitable mechanism from the driving mechanism.
The purpose of this spindle C is to move the work support in the longitudinal
direction of the guide bar or bed A.
The poppet K is adjustable on the guide bar or bed A and is fixed in position
thereon by means of the binding screw k.
0
The principal part of the apparatus is the work support which is composed of
several parts. These are first; the sleeve D which is guided directly on the guide
bar or bed A and in the interior of which is provided a nut d through which passes
the screw spindle C by means of which this nut d and the sleeve D can be moved
longitudinally on the guide bar or bed A, secondly the part E F consisting of two
straps standing cross-wise to each other. The strap E embraces the sleeve D and
is split and provided with two lugs e e¹ through which passes a screw f by means of
which the strap E is tightened on the sleeve D.
The strap F stands cross-ways to the strap E, it is also split and provided with
Jugs e e¹ and a screw f' and serves to hold the part G in any desired position. To
facilitate the turning of the part E F round the sleeve D it is provided with a
spindle R on which is formed a worm which engages in a worm wheel or rack r
formed on the sleeve D.
The third part of the work support is the part G. This carries a prismatic
guide bar or bed similar to the guide bar or bed A and is fastened in the strap F
by means of the pin g round the axis of which it may be turned. This bar or bed
forms the guide for the fourth part of the work support i.e. the fastening or
clamping device H the construction of which can be modified to suit the work to be
done; it slides on the bar or bed G and is moved by the screw threaded spindle J
in the hollow of said bar. In consequence of this peculiar construction of the work
support it is possible to impart to it a great variety of movements.
By means of the sleeve D it can be moved along the guide bar or bed A, by
means of E F it can be turned around its axis and by means of the part G it can
he moved perpendicularly to the longitudinal axis of the guide bar or bed A. The
part G can also be adjusted in a vertical direction to the guide bar or bed A and in
a horizontal direction round its pivot pin g. Besides, as represented in Fig. 4 the
fastening or clamping device H can be adjusted perpendicularly to the longitudinal
axis of the guide bar or bed A.
To the foot or base A' is fixed the frame B which carries the driving mechanism
and the spindle L'. This frame B is fastened to the base A' by means of bolts or
screws passing through slots in the frame B so that it can be turned round the
pivot pin see fig. 2 in dotted lines. The hind part B of the frame B is provided
with an elongated bearing m which is recessed for a certain distance in the middle.
The spindle L' does not pass throughout the whole of the bearing m but only
reaches into the recess with its end n. Against this end n bears the pin a' of the
screw a screwed into the other end of the bearing m, on which pin a' also turns the
driving sleeve d', this driving sleeve gears on one side with a toothed wheel c' on
the end of the spindle L and thus drives this. By means of the screw a² the
position of the spindle L' can always be properly adjusted.
At the other end of the spindle L' is provided the centre L and onto the adjacent
screw threaded part may be fastened any suitable instrument according to the work
to be performed.
The driving sleeve d' is driven by the chain or cord P (Fig. 6) one end of which
is attached to the pulley O and passes several times round the driving sleeve and
then down to the ground where the other end is fastened to a treadle.
If the cord or chain is pulled down by depressing the treadle the driving sleeve d¹
is turned as also is the pulley O which is under the influence of a spring which
spring at the time is being wound up. As soon as the treadle is liberated the spring
will return the pulley O into its normal position and thus wind the cord or chain up
again.
In the driving sleeve is arranged a pawl which engages with the ratchet wheel c¹

page_text: of the spindle L for turning it when the driving sleeve is being turned. During
the turning back of the driving sleeve when the cord or chain P is wound up by the
pulley O, the spindle still rotates through the momentum of its fly wheel M and by.
pulling down the cord or chain again is kept in constant rotation.
The operation is as follows;-
The machine is either fastened to the bench or in a vice. If beading is to be
done, the beading tool is fastened on the centre L and the part to be beaded is
clamped and fastened in a suitable manner in the fastening device H and adjusted
in a proper position with regard to the beading tool.
As the work support is adjustable in a longitudinal as well as a transverse
direction and also can be turned round its own axis it can be easily understood that
the part to be worked can be placed in any desired position to be worked.
The tool can also be adjusted with reagrd to the part to be worked and the frame
carrying the driving mechanism with the centre L which carries the tool can be
moreover adjusted horizontally as described above.
The guide bar or bed A may be of circular section as represented in fig. 5 instead
of being of prismatic section.
Having now particularly described and ascertained the nature of the said inven-
tion 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 turning lathe or apparatus the arrangement of a prismatic guide bar or
bed A constructed and fitted as hereinbefore set forth provided with a foot or base A¹
which serves for fastening the apparatus to a bench or in a vice and to carry the
frame B substantially as herein described and illustrated in the accompanying.
drawings.
2. In a turning lathe or apparatus the combination of the work support consisting
of the nut d, the straps E F, the prismatic guide bar G and the fastening device H,
for the purpose of rendering the work support movable in its component parts in all
directions and around its own axis substantially as described and illustrated in the
accompanying drawings.
3. In a turning lathe or apparatus the combination of the nut-d-with the serew
spindle C for the purpose of moving the work-support longitudinally on the guide bar
or bed A substantially as herein described-and-illustrated in the accompanying
drawings.
4. 3. In a turning lathe or apparatus the sleeve D with the worm wheel r formed
upon it and the combination thereof with the spindle R carrying a worm for the
purpose of moving the part E F around the nut d substantially as herein described
and illustrated in the accompanying drawings.
4. In a turning lathe or apparatus the combination of the guide bar or bed G
with the part E F for the purpose of obtaining a circular movement of the former
round its pivot pin
substantially as herein described and illustrated in the
accompanying drawings.
6. In a turning lathe or apparatus the prismatic guide bar or bed G in combination
with-the-fastening device H substantially as herein described and illustrated in the
accompanying drawings.
7. In a turning lathe-or-apparatus-the-combination of the driving mechanism
consisting of the spindle L' with the ratchet wheel-c-on-its-end-n-the screw a²-and the
driving sleeve d' on the pin a' of the said screw a² substantially as herein described
and illustrated in the accompanying drawings.
8. In a turning lathe or apparatus the combination of the driving sleeve with an
elastically-supported cord-P and a treadle; and the combination of the driving
sleeve-d' with the wheel c' and a pawl for the purpose of turning the spindle-L'
substantially as herein described and illustrated in the accompanying drawings.
05. In a turning lathe or apparatus the combination of the guide bar or bed A
of prismatic or circular section with the work support and the poppet substantially
as herein described and illustrated in the accompanying drawings.

page_text: 10. 6. In a turning lathe or apparatus the combination with a bed such as A
cranked so as to form the part A' of the frame B adapted to swivel and be adjusted
thereon substantially as herein described and illustrated in the accompanying
.drawing.
Dated this 20th day of May 1889
W. P. THOMPSON & BOULT,
Agents.