Improvements in and connected with Formers for Lathes for Turning, Profiling and Milling Machines.
Year: 1899

page_text: Date of Application, 10th July, 1899
Complete Specification Left, 10th Apr., 1900-Accepted, 7th July, 1900
PROVISIONAL SPECIFICATION.
Improvements in and connected with Formers for Lathes for Turning,
Profiling and Milling Machines.
I, HENRY LIEBERT, of Perseverance Works, Milnrow, in the County of Lancaster,
Engineer, do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in and connected with formers for
lathes for turning work having curves, say such as roller stands for cotton
machinery, lubricators for steam engines and the like, and for profiling and
milling machines generally, the object being to provide means whereby such
curves can be turned or milled automatically even when very steep whereas
these curves and the like work have hitherto been turned, profiled or milled
by hand or with wide shaped tools.
To this end I may entirely dispense with such wide shaped cutting tools, as
the same cannot be made hard enough to last sufficiently long to work against
the scale of the metal and employ in lieu thereof an ordinary turning tool con-
trolled by the said former or may employ the last named tool in connection
with a wide shaped cutting tool serving only as a finishing tool.
The cross feed of this tool I control by a rotating former which either moves
longitudinally with the turning tool or is stationary.
The spindle which moves the turning tool longitudinally and that which rotates
the said former are always geared together and their speeds may be so proportioned
that the first named spindle will revolve slower than the last named spindle and
greater accuracy is thus ensured in the turning of the curves whether gentle
or steep.
According to one form of my invention and when arranging the former longi-
tudinally stationary, I form the part thereof which gives the desired curve to the
work, with a suitably pitched thread and according to another form, I may use the
said former in the shape of a cam, the throw of which corresponds with the
shape of curve to be turned on the work and cause same to slide with the saddle
of the lathe.
Dated this 27th day of June 1899
COMPLETE SPECIFICATION.
Improvements in and connected with Formers for Lathes for Turning,
Profiling and Milling Machines.
I, HENRY LIEBERT, of Perseverance Works, Milnrow, in the County of Lancaster,
5 Engineer. do hereby declare the nature of this invention and in what manner the
[Price 8d.1

page_text: .
same is to be performed, to be particularly described and ascertained in and by
the following statement:-
This invention relates to improvements in and connected with formers for
lathes for turning work having curves, say such as roller stands for cotton
machinery, lubricators for steam engines and the like and for profiling and
milling machines generally, the object being to provide means whereby such
curves can be turned or milled automatically even when very steep whereas
these curves and the like work have hitherto been turned, profiled or milled
by hand or with wide shaped tools.
And in order that my invention may be more, fully understood I have caused
to be appended hereunto one sheet of drawings marked with letters of reference
indicating like parts in the various figures.
Fig. 1 is an end view and Fig. 2 a plan of my improved former device (shown
as applied to a lathe and Figs. 3 & 4 are respectively an end view and plan
detached of a modification thereof.
In carrying out my invention and referring to one form thereof Figs. 1 & 2,
I dispense entirely with the aforesaid wide shaped cutting tools, as such cannot
be made hard enough to last sufficiently long when used to work against the
scale of the metal and I employ in lieu thereof an ordinary turning tool a con-
trolled by a rotary former b.
The said turning tool is carried by a slide e rendered crosswise adjustable upon
a slide d mounted in the saddle e, and the said former is secured upon the
back shaft of the lathe. The spindle by which the saddle e is moved longi-
tudinally and the back shaft f are geared up as usual.
In the present instance the former b consists of a cylindrical body having on
its periphery a suitably pitched thread b¹ rising in volute fashion in accordance
with the shape to be given to the work h.
This former is secured upon and rotates with the back shaft f in contact with
a guide piece à secured to the slide & which guide piece by means of the weighted
lever is always kept in contact with the periphery of the said former and
through the medium of the slide causes the turning tool to follow the curve
represented by the said former.
According to another form of my invention I may, in lieu of the said threaded
former, employ a cam shaped former 62, such as shown in Figs. 3 & 2, which is
adapted to rotate with and slide at the same time on the shaft f jointly with the
guide piece carried by the slide, the face of the said cam also representing the
curve to be given to the work.
In some cases I may employ upon the slide c in a bracket 7 fixed thereto, a
wide shaped cutting tool m, see Figs. 1 & 2, which however is only used as a
finishing tool after the work has been shaped by the turning tool a controlled by
the former band for which purpose the latter is rendered inoperative.
The improvements described are also applicable to profiling and milling
machines and as such application is practically the same as to lathes it will be
readily understood without special illustration.
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. In lathes for turning, profiling and milling machines the use of a rotary
former the periphery of which represents the curve to be given to the work, all
substantially as set forth.
2nd. In lathes for turning, profiling and milling machines, a rotary former the
periphery of which represents the curve to be given to the work, in combination
with an ordinary turning tool, the cross feed of which is controlled by the said
former. all substantially as and for the purpose set forth.
3rd. In lathes for turning, profiling and milling machines, in combination,
a rotary former, an ordinary turning tool and a wide shaped finishing tool, the

page_text: cross feed of the said turning tool being controlled by the same former and the
said finishing tool carried by the same slide as the said turning tool, all sub-
stantially as set forth.
...1
OL T
1000
F. BOSSHARDT & Co.,
4, Corporation Street, Manchester,
Agents to Applicant.