Improvements in Pipe and Rod Severing Machines.
Year: 1892

page_text: Date of Application, 1st July, 1892-Accepted, 17th Sept., 1892
COMPLETE SPECIFICATION.
Improvements in Pipe and Rod Severing Machines.
A communication from OTTO MANSFELD, of 31, Neue Grunstrasse, Berlin,
Merchant, and KARL KNAPPE, of Friedrichshagen, Machine Builder, both in
the German Empire.
I, ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex,
Member of the Institution of Mechanical Engineers, 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:-
Machines of this class are generally of a heavy or bulky construction and
require a firm foundation and steam or other similar motive power to operate them.
Whenever therefore such machines are used, it is necessary that there should be
ample space available. This considerably limits the scope within which existing
rotary cutting machines could be utilized, and excluded them from employment in
mines, on railways and on works unprovided with motive power notwithstanding
the fact that machines of this description are apt to be of unquestionable utility in
the places mentioned.
The inconveniences above referred to, according to the present invention, are
obviated by the employment of an improved cutter-head and the machine is
enabled to be operated by hand and may be readily carried from place to place,
and its construction so economical and simple as to bring it within reach even of
handicraftsmen on a small scale.
In the accompanying drawings, Fig. 1 is a side elevation of the improved cutting
machine of which
Fig. 2 is a vertical section on line 1, 1, Fig. 1.
Fig. 3 a front view and Fig. 4 a detail view.
is
The cone A forming part of the frame resting upon legs or supports
surrounded by the cone B forming a cutter-head. This cone B at its rear end is
provided with a toothed ring in gear with the pinion C¹ (Figs.
and 3)
mounted upon the driving shaft D. The machine is operated by means of the
hand wheel d.
Into a slot or guide e (Fig. 4) is inserted a block E so that it may be readily
moved backwards and forwards. To this block E is rigidly secured in a well-
known manner a cutter or tool F (Figs. 1 and 2). The feed of this cutter F is
effected by means of the block E which for this purpose is provided at the back
with teeth (Figs. 2 and 4) gearing with the spirally ribbed or toothed feed-plate
or disc G (Fig. 2). This feed-plate is provided at its periphery with a toothed
ring gearing with the pinion g' mounted upon the shaft D.
22
The pinion g' should have one tooth less than, or one tooth in excess of, the
pinion C, so that by turning the hand-wheel d and thus revolving the cutter-
head B with the tool F, and also the feed-plate G which moves about the "blank"
or work to be operated on the block E is gradually moved closer to the "blank
and the cutter is caused to operate under an equally maintained feed or pressure.
This constant uniformity of pressure in the operation of the cutting-tool is one of
the essential advantages of the machine as it enables the intermittent and abrupt
tightening of the tool, hitherto practised, and couducive to a variety of inconveniences,
to be entirely avoided.
"
The blank' is in the well-known manner secured in the vice K which is
connected with the cone or frame A. (Fig. 2) and is of any well-known construc-
tion. The cutter F may be moved outwards at increased speed by mounting the
pinion C loosely upon the shaft D and coupling that pinion with the pinion g'
which is rigidly secured on the shaft D by means of a removable pin f. When
D

page_text: this pin or bolt is withdrawn, the pinion g' imparts motion to the feed-plate G,
while the cutter-disc B remains stationary, the result being that the block E
rapidly moves back in the slot e along with the cutter F secured thereon.
The revolvable though firm connection of the cutter-head B with the cone or
frame A is secured by means of the lugs or plates provided on the cutter-head
and which as shown in Figs. 1 and 2 engage with the frame A at the back of the
inclined flange or cone. The conical portion of the cutter-head naturally need not
form a continuous annular surface, but may be composed of a number of segments
with free spaces between them. The firm engagement of the feed-disc G with the
block E is ensured by the arrangement of the feed-disc upon the nave or boss H
of the cutter-head B (Fig. 2) in such a manner that it may freely turn thereon
and be retained in place by the screwed ring h. If the machine is to be operated
by steam or otherwise than manually a belt-pulley or equivalent may be mounted
on the driving shaft instead of the hand-wheel d and the feet a bevelled or
dovetailed at a (Fig. 1) may be fitted on a suitable bed-plate or support.
Having now particularly described and ascertained the nature of the said
invention, as communicated to me by my foreign correspondent, and in what
manner the same is to be performed, I declare that what I claim is :-
1. In a rotary cutting machine the arrangement of the tool F in a plate or
disc B mounted on a suitable frame A and rotating in or upon the same the
frame A being stationary and having the "blank" secured in it substantially as
described and illustrated in the accompanying drawings.
2. In a cutting-machine such as described the arrangement of a spirally ribbed
or toothed feeding disc or plate such as G adjacent to the cutter-dise B and in
gear with a toothed block such as E which carries the cutting tool and works in a
slot or guide e of the cutter-head B the cutter-head and the feeding-disc being
each provided with teeth at its periphery (at g and C respectively) which gear
with pinions gl and C' respectively rigidly secured to the shaft D whereby while
the cutter-head B is rotated the cutter is continually and uniformly fed towards
the centre of the "blank" substantially as described and illustrated in the
accompanying drawings.
3. In a cutting machine such as described the coupling or connection of the
pinion Coperating the cutter-dise with the driving shaft D by means of a bolt or
pin such as passing through a pinion 'g into a perforation provided in the
pinion C whereby both pinions are locked together the object of such coupling
being that when the bolt is withdrawn the release of the pinion C will enable
the cutter F to be run backwards with increased speed substantially as described
and illustrated in the accompanying drawings.
4. The combination and arrangement of parts constituting the complete cutting
machine substantially as described and illustrated in the accompanying drawings.
Dated this First day of July 1892,
ALFRED J. BOULT,
Chartered Patent Agent.