Improvements in Machines for the Manufacture of Machine and other such Screws.
Year: 1894

page_text: Date of Application, 23rd June, 1894
Complete Specification Left, 27th Oct., 1894-Accepted, 27th Apr., 1895
PROVISIONAL SPECIFICATION.
Improvements in Machines for the Manufacture of Machine and
other such Screws.
ROBERT JOHN ALPE of The Auto Machine Company of 91 Bridge Street
West Birmingham in the County of Warwick Engineer do hereby declare the
nature of my said invention to be as follows:-
My invention has for its object improvements in machines for the manufacture
of machine and other screws such as those for the valves of cycle tyres by which
they may be made much more rapidly than hitherfore and consequently much
more cheaply.
In carrying my invention into effect 1 form the bed with a rack running the
whole length and upon this the operating tools are mounted upon a travelling
support having a pinion engaging with the rack. The rods from which the screws
are formed are fixed in the driving end four five six or any number side by side
so as to revolve and run the whole length of the bed the front ends of the rods
being inserted in hardened bushes on the travel support a portion projecting
beyond to receive the operation of the tools which are mounted upon the support
the tools to each rod being so that by the movement of a lever the whole of the
reds are operated upon at the same time for the reduction & cutting off of
the rods prior to being screwed by the tapping jigs which are mounted opposite
the end of the rods in the front of the support so that they can be brought up
against the blanks which have been formed on the end of the rods by the previous
described operation. In the case of screws such as those used in valves of cycle
two thicknesses and drilled
tyres where the blank requires to be reduced to
mount two tool boxes to each rod one above & one below. Each tool box has two
tools which are each mounted in an arm the tool box being so pivoted that each
tool can be brought to bear upon the rod or blank the top row of tools being
connected with one hand lever while the bottom row are connected with another
hand lever. A stop is formed in the tapping jigs so that as soon as the screw is
tapped the required distance, the jig then is free to revolve with the screw thus
being passable by reason of the one part of the jig being made to revolve on the
fixed part both parts being fixed together while the screwing is commenced by
studs which engage with each other until the traveling carriage is stopped when the
one part of the jig continues to travel forward by reason of the thread until
the studs are clear of each other at which point the travelling part revolves with
the screw & thus stops the screwing process. The tapping jigs and drilling tool
are mounted in a support which is inade to slide laterally and is connected with
an eccentricaly mounted handle by which the said support can be moved as to
alternately bring either of the tapping jigs or the drill opposite to the rods or
blanks to be operated upon. Three pulleys are mounted on the chuck stem of one
rod the one being loose & the other two running in reverse directions while the
pulley fork is connected with a treadle so that the two bands can be drawn on to
either of the pulleys one or the other being always on the loose pulleys by the means
of which treadle the revolving of the rods is reversed for tapping and cutting off
the latter being effected by tools mounted upon the reverse side of the revolved

page_text: levers which support the preparing, tools and operated by a reverse movement.
of the previously mentioned hand lever.
Dated this 22nd day of June 1894.
GEORGE BARKER,
77, Colmore Row, Birmingham, Agent for Applicant.
COMPLETE SPECIFICATION.
Improvements in Machines for the Manufacture of Machine and
other such Screws.
1, ROBERT JOHN ALPE, of The Auto Machine Company of 91 Bridge Street
West, Birmingham, in the County of Warwick, Engineer, do hereby declare the
nature of my said invention and in what minner the same is to be performed to
he particularly described and ascertained in and by the following statement:-
My invention has for its object improvements in machines for the manufacture
of machine and other such screws such as those for the valves of cycle tyres
where they require to go through several operations by which such screws are
produced much more rapidly and consequently much cheaper than hitherto.
In cider that my invention may he clearly understood and more easily carried
into practise have appended hereunto two double sized sheets of drawings upon
which I have illustrated the nature of my said improvements and the mode of
carrying the same into effect.
Figure 1, is a plan of my machine.
Figure 2, is a side elevation.
Figure 3., is a cross sectional elevation on line 1-2.
Figure 4., is a cross sectional elevation on line 3-4.
In carrying any invention into effect form the bed A with a rack a' running
the whole length and upon this bed the carriage B' travels being operated by a
pinion which engages with the rack. The tools e, c', and e' are mounted upon the
carriage B and operate upon the rods D which are fixed in the revolving chucks E
which are placed at the driving end of the machine and pass through hardened
bushes formed in the traveling support Bat through which they project as the
travelling carriage B is advanced and by which they are held steady during the
operation of the various operating cutters screwing jigs & or drills e². The
cutters are mounted in the boxes which are pivotted at the pivots being
connected by levers and rods to any suitable actuating hand lever by which
the whole of either the right or left row of cutters can be operated at once, the
same arrangement being arranged above and below the rods so that one two
or more distinct operations may be applied to the end of the rod thus forming the
blank ready for being operated upon by the screwing jigs c. c', and drills as for
instance in the case of screws such as those used in the valves of cycle tyres where
the blank first requires to be reduced to two sizes drilled & screws formed on the
two diameters apply one cutter of the top tool box and afterwards one of those
carried by the bottom tool boxes F thus forming the blank ready for the operation
of the tapping jigs and drills. The front part of the screwing jigs are mounted
to revolve on their support e but are provided with a stud or studs by which they
engage with the supports and are prevented from turning when pressed against
the blank upon which they are to operate. As soon however as the front part c
of the jig begins to operate upon the blank it is carried forward as the screwing
process proceeds until the studs of the moving part e are disengaged from the
fixed support e the screwing part c of the jig is free to revolve with the end of
the rod forming the blank at which point the screwing of the blank is finished.
The screwing jigs c & el being again released by the reversal of the revolving of
the rods as hereafter described. The screwing jigs e and c and drills
are

page_text: mounted upon the support II which slides laterally upon the carriage 13 and is
operated by the eccentric mounted to revolve in the collar which is fixed to
the carriage Band which is connected to the slide by the lever K the handle L
being attached to the disc J and having upon its underside the spring stul or
nose which engages with stops formed upon the carriage 13 & collar so
as to easily register the drills or jigs in a central position with regard to the
blanks and by which means either one or the other of the jigs or drills may be
brought into position for operating upon the end of the rod. For cutting off the
screws when finished one or other of the cutters F are brought into action as
before described and the action of the machine reversed and one arm of the top box
may be made to support the screw while being cut off by a cutter in the arm of a
bottom box or vice-versa. It will be noticed that one arm of each cutter box is
made longer than the reverse arm thus enabling each of the top cutters to be
brought into action without interfering with bottom and ece-versa.
The three
pullies M are mounted on the chuck stein of one rod the centre one being loose
and the other two mounted so as to operate the stem in reverse directions, the
pulley fork being connected with a treadle so that the two hands can be moved on
to either pulley one or the other being always on the loose pulley by which means
the action of the machine may be reversed for purposes before described.
The action of the chuck stem m is converted to the other stems m² by the spur
wheels and intermediate spur wheels m. The stems m and m² are hollow for
the feeding of the rods D into the machine and the carriage B is operated by
means of the hand wheel N. I do not confine myself to the particular number of
the rods shown which my machine may accomodate as I may form it fer que two
or more but generally prefer four as being the most convenient and 1 do not
confine myself to the number of tools which I may mount in the support as I may
mount two three or four as may be required for the particular article to be
formed. The various details may also be modified as for instance I may operate
the cutter boxes by a push and pull movement as 7 or I may mount a lever ƒ on
one of the pivots /'.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed 1 declare that what I
claim is :-
1st. The improvements in machines for the manufacture of machine and other
such screws substantially as and for the purpose herein set forth and shown upon
the accompanying two sheets of drawings.
2nd. In machines for the manufacture of machine and other such screws the
double cutter boxes F and F mounted and operated substantially as and for the
purpose herein set forth and shown.
3rd. In machines for the manufacture of machine and other such screws the
tools c, c, and c³, mounted on the travelling and sliding support in combination
with one two or more revolving rods D substantially as and for the purpose herein
set forth and shown.
Dated this 25th day of October 1894.
GEORGE BARKER,
77, Colmore Row, Birmingham, Agent for Applicant.