Year: 1887

page_text: Date of Application, 18th Nov., 1887
Complete Specification Left, 20th Aug., 1888
Complete Specification Accepted, 9th Nov., 1888
I, WILHELM REH, of Dresden Löbtau in the Kingdom of Saxony Manufacturer do
hereby declare the nature of this invention to be as follows:
This invention relates to machines for turning and cutting screws bolts and the like,
solid or tubular from bar or wire metal fed automatically thereto.
The improved machine comprises a suitable bed plate or stand having guides for certain
slide rests for the various tools employed. On the machine bed is journalled a tubular
spindle capable of revolution in either direction and containing clip and feed mechanism
for holding and feeding the bar or wire metal from which the screws or the like are to be
cut. On the bed of the machine are likewise journalled shafts adapted to be operated by
power and carrying certain cams, one or more for each of the aforesaid slides, for the
moving or said slide rests in order to bring the tools affixed thereto into operation in
the manner required upon the wire or bar for the cutting of the screws. The slide
rests are preferably held against the pressure of the cams by springs. The clip
mechanism for the bar or wire is preferably a set of elastic arms adapted to move
longitudinally in the tubular spindle and be deflected onto the bar or wire by abutting
upon an inclined surface or surfaces in said spindles. The bar or wire feed is
preferably of a lever and clip construction. If a tubular screw is to be cut a suitable
core or block is inserted into the spindle and the material is forcibly fed thereon and
caused to pass around the same.
The shape and sequence of the cams will differ according to the stile of work to be
made and the feed is rendered adjustable. The wire or bar is fed forward the required
length clipped fast and caused to revolve the cams then cause the respective tools to
bear and work upon the projecting and rotating blank, in their proper sequence. For the
manufacture of screws there are, for the cutting, preferably three tools, the first operating
a longitudinal cutting or turning down of the material, the second a female screw-
threaded biock or similar tool into which the turned down blank is forced, and the

page_text: third a shearing tool for separating the screw and forming the head thereof. In this
arrangement the spindle is provided with two belt pulleys adapted to be clutched
thereto by an automatically operated clutch. The helt over one of these pulleys is
crossed so that when the clutching of the pulleys is changed the spindle revolves in
the contrary direction to its former movement, this being for the purpose of with-
drawing the blank from the threading tool, by unscrewing the same therefrom.
Dated this 18th day of November 1887.
HERBERT & Co.,
Agents to Applicant.
COMPLETE SPECIFICATION.
Improvements in Machines for Cutting Tubular and Solid Screws,
Bolts, and the like.
I WILHELM REH of Dresden Löbtau in the Kingdom of Saxony, Empire of Germany,
Manufacturer 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 machines for turning and cutting screws, bolts and the
like, solid or tubular from bar or wire metal fed automatically thereto.
The improved machine comprises a suitable bed plate or stand having guides for
certain slide rests for the various tools employed. On the machine bed is journalled
a tubular spindle capable of revolution in either direction and containing clip and
feed mechanism for holding and feeding the bar or wire metal from which the screws
or the like are to be cut. On the bed of the machine are likewise journalled shafts
adapted to be operated by power and carrying certain cams, one or more for each of
the aforesaid slides for the moving of said slide rests in order to bring the tools affixed
thereto into operation in the manner required upon the wire or bar for the cutting of the
screws. The slide rests are preferably held against the pressure of the cams by springs.
The clip mechanism for the bar or wire is preferably a set of elastic arms adapted to
move longitudinally in the tubular spindle and be deflected onto the bar or wire by
abutting upon an inclined surface or surfaces in said spindles. The bar or wire feed
is preferably of a lever and clip construction. If a tubular screw is to be cut a suitable
core or block is inserted into the spindle and the material is forcibly fed thereon and
caused to pass around the same.
The shape and sequence of the cams will differ according to the stile of work to be
made and the feed is rendered adjustable. The wire or bar is fed forward the required

page_text: length clipped fast and caused to revolve, the cams then cause the respective tools to
bear and work upon the projecting and rotating blank in their proper sequence.
For the manufacture of screws there are preferably three tools, the first operating
a longitudinal cutting or turning down of the material the second a female screw
thread block a similar tool into the turned down blank is forced and the third a
shearing tool for separating the screw and forming the head thereof. In the arrange-
ment the spindle is provided with two belt pulleys adapted to be clutched thereto by an
automatically operated clutch. The belt over one of these pulleys is crossed so that when
the clutching of the pulleys is changed the spindle revolves in the contrary direction
to its former movement, this being for the purpose of withdrawing the blank from the
threading tool by unscrewing the same therefrom.
Referring to the annexed drawing
Fig. 1 is a side elevation of the machine.
Fig. 2 a plan, Fig. 3 a cross section, Figs. 5 to 10 detail views of parts.
On the bed plate a is journalled the shaft b which receives its rotary motion from
the pulleys c.
On the shaft b are arranged two worms d and d*, one having a right,
the other a left handed screw thread and which gear respectively with the toothed
wheels e and e¹ and drive the shafts fand f.
The shaft drives through a pair of bevelled wheels g g¹ the shaft h. On the shaft f
are arranged the cam disks i, k and l. These cam discs act respectively on the slide
rest p the thread cutting block o and the slide rest n which are displaceably lodged on
the bed plate a.
The slide rest n is displaced to the right by and has a guide shaft 7 carrying on its
end a roller which by the action of spring r (Fig. 2) is held always in contact
with 1.
The cam disc m arranged on the shaft displaces the slide rest n so far inwardly
and perpendicularly to the longitudinal axis of the machine as is required according to
the desired thickness of shaft of the object to be turned. If for instance a straight
cylinder is to be made the part 1-2 of the periphery of m acting on the roller s'
during the action of the cam disc (Fig. 3) is likewise circular, in other cases it is a
corresponding curve. The slide rest resumes its original outward position by the
action of spring t as soon as the nose of the disc m passes from the roller s¹.
The thread block o is displaced by the cam disc k acting on the roller u¹ of the
shaft U as soon as it has fulfilled its function it resumes its original position by
spring w (Fig. 1). The slide rest p which carries the cutter is displaced inwardly,
perpendicularly to the longitudinal axis of the machine by the cam disc i which presses
on the roller of the wedge a moving in a socket. The bevelled part of the wedge
slides on a roller y lodged in the upper part of the slide rest thus shifts the latter
inwardly. After the largest radius of i has passed the roller x¹ the support p and the
wedge resume their original positions the former by the action of the spring z
(Fig. 3) and the latter by the action of the spring (Fig. 1). The material is
clamped in likewise automatically. The wire A to be worked is introduced into a
tube B (Fig. 2) which is displaceable within the spindle Cand abuts to the left against a
tube D which is recessed as in Fig. 8 so as to be elastic so that as soon as it is pressed
against the inner wall of the mouthpiece E screwed onto the spindle c it can be
diminished in diameter. This is effected by the disc F situated on shaft f¹ and having
a recess F¹. Into this cut or recess F¹ falls a roller H on the lever G as soon as the
wire is to be introduced or released. As F rotates the roller H leaves the recess F¹
and arrives on the periphery of disc F. The lever G is raised and another small
lever T situated on G presses with its roller T¹ on the cone K which moves the lever
arms L L asunder. L and L' act on the tube B to displace the same so that the
tube D¹ is pressed against E and is compressed and clamps fast the wire. Now the
wire, the tube B and spindle c form an integral whole and are set in rotation in one or
other direction according as the clutch N engages the pulley M or M¹ driven by
belting the latter with a crossed belt.
The setting in operation of one or the other of these pulleys is automatically
effected by the machine. For this purpose a disc O is situated on the shaft ƒ¹ (Fig. 1).

page_text: The cam o¹ of the same acts as soon as the pulley M³ is to be engaged by the clutch
on the abutting screw P of a slide rod Q. On the latter is situated the fork Q¹
which surrounds the clutch N and presses the same onto M¹. The rod O is returned
by a spring.
The machine acts as follows:-
Into the
To manufacture for instance screws the wire to be worked is introduced into the
tube B and the machine set in motion by placing the strap on the pulley c.
slide rest n is introduced the turning steel, into the thread block at R a thread cutting
tool and into the slide rest p a shearing cutter. First the slide rest n with the turning
tool is moved so far towards the wire by means of the cam disc m as to cut off the
amount intended. Subsequently the disc displaces the rest so much to the right as
the length intended for the shaft to be turned, the roller q¹ riding on the part from
3 to 4 (Fig. 5) after which n rebounds into its original position by the action of the
spring and at the same time moves outwardly from the wire by the action of springt,
(Fig. 3). As in the mean time the cam disc m has revolved so far that the roller s¹
arrives on the track of shorter radius from 2 to 1. The thread is then cut by the cam
disc & pressing the cutting block o endwise on the turned shaft so that the cutting
tool R catches the same. After the thread has been cut, the disc O situated on shaft
acts by means of its cam o' on the set screw P of the slide rod Q and the clutch N
engages the pulley M³ so that the spindle is revolved in the opposite direction and the
screw is turned out of the cutting tool and the latter resumes with the cutting block o
its original position by the action of the spring w. Subsequently the screw head is cut.
This is effected by the cam disc i which displaces the wedge against the roller y of
the slide rest p so that it moves against the wire and its cutting steel cuts the screw.
The slide rest is moved back into its original position by the springs z and ¹. The
wire is subsequently automatically advanced for the purpose of making further screws.
While the tools were in action, a cam disc T acting on the arm u and fixed on the
shaft has displaced to the right a peculiar mechanism consisting of a main arm V
through the eye V₁ of which passes the wire, the slide rod V the guide rods W
and W₁ the clamp pins Y and Y₁ the springs Z and Z¹ the poise Z and the abut-
ment Z³.
The clamping pins Y and Y¹ hold fast the wire through the springs Z and Z. At
the same time that the roller H approaches the recess F₁ of the disc F the disc T
(Fig. 1) has displaced the wire feeder to the right. The slide rods W and W¹ thereby
draw the clamping pins Y, Y' outwards so as to release the wire.
When H enters into F¹ the wire is freed there but siezed by the pins Y and Y₁ as
the roller of the arm u passes on to the small diameter of the cam disc and the
springs Z and Z can act on the clamping pins. The whole wire feeding mechanism
now moves with the clamped wire towards the machine by aid of the poise Z³ until it
abuts against the abutment Z³ adjusted corresponding to the length of the screws to
be manufactured. By the action of the tube B on the tube D' the wire is clamped fast
by the latter and the process commences anew while the wire feeding mechanism frees
the wire and is again moved to the right for the length of the screw.
For the purpose of turning tubes a borer or drill is introduced instead of the cutting
dies. To produce fashioned pieces the cam disc m is given the corresponding shape.
Also discs with or without hole can be cut off. The shafts f and f¹ are displaceably
lodged in longitudinal bearings to allow objects of different lengths to be turned.
The pulleys M and M¹ may be formed as cone pulleys to give the spindle different
speeds.
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
1. In machines for turning screws, bolts and other fashioned pieces from automatically
fed material, the combination with a rotary clamp or holder of a slide rest movable in
the plane of the axis of said clamp, rotary cams for operating said slide rest, a screw
cutting slide block movable reciprocally in the line of the axis of said clamp, a cam for
operating said slide block, a second slide rest movable reciprocally perpendicularly to

page_text: the axis of said clamp, and a rotary cam for operating the same, and gear for operating
said cams in the sequence desired.
2. The combination, in a machine for turning and cutting off or fashioning a
sequence of objects from an automatically and intermittently fed blank; of a rotary
sleeve with inner conical termination, a slit clamping sleeve movable longitudinally
therein, and a cam for operating said movement for periodical clamping of the blank
in said rotary sleeve.
3. In a machine for turning screw threads the combination with a movable block
having a female screw matrix, a rotary holder for the blank, a clutch two loose
pulleys adapted to be temporarily engaged to said holder by said clutch and a cam for
periodical operation of said clutch; for the screwing of said blank into said matrix
and the unscrewing of the same therefrom.
4. In a machine for the consecutive formation of screws or other fashioned pieces
from a blank, an automatic intermittent feed for said blank comprising in combination,
a movable block with a clamping mechanism therein and cams for the operation of said
mechanism and for the moving of the block substantially as set forth.
5. The machine comprising the above-mentioned mechanisms, substantially as
illustrated and described."
Dated this 18th day of August 1888.
HERBERT & Co.,
18, Buckingham Street, Strand, W.C.
Agents to Applicant.