Improvements relating to Apparatus or Machines for Cutting or Forming Screw Threads upon Bolts and the like.
Year: 1892

page_text: Date of Application, 6th Feb., 1892-Accepted, 12th Mar., 1892
COMPLETE SPECIFICATION.
Improvements relating to Apparatus or Machines for Cutting or
Forming Screw Threads upon Bolts and the like.
We, JOHN ARTHUR INGHAM, of Sandbrook Mill, Orrell, near Wigan, Cotton
Spinner, and SYLVESTER DERBYSHIRE, of 6, Mill Road, Orrell, near Wigan,
both in the County of Lancaster, Overlooker, 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 :-
Our invention relates particularly to that part of an apparatus or machine of the
hereinbefore mentioned kind, which carries or holds the bolt, or equivalent article
being operated upon, and the object of our improvements is to provide means so
that the apparatus or machine may be worked more quickly than heretofore
which can be done without any resulting disadvantage for some classes of work, and
thereby a saving be effected.
The invention will be best understood by describing it with the aid of the
accompanying sheet of illustrative drawings, and it may here be observed that
the invention is not limited in its application to any particular make of apparatus
or machine, but is adaptable to all kinds and that therefore A, on the drawings, is
the end of that shaft in a screw thread cutting or forming machine of any kind
whatsoever to which, heretofore, the bolt, or equivalent article, to be operated
upon, was applied, and along with which it received the requisite circular
motion.
On the accompanying sheet of drawings-
Figure 1 is a view in side elevation showing our improvements, the movable
parts being in the position in which the bolt is ready to be advanced to be operated
upon by the dies.
Figures 2 and 3 are an end elevation and a plan view respectively of Figure 1.
Figure 4 is a sectional view showing the movable parts turned so that the
finished bolt has been brought into such a position that it will drop out of the
machine by its own weight.
Figure 5 is a view corresponding to Figure 4, the movable parts being again
turned into their normal position.
A, as has been mentioned, is supposed to be the end of a certain shaft in any
make of an apparatus or machine for cutting or forming screw threads upon bolts
or the like; to the end of this shaft we adapt in any convenient way two bearing
pieces, for instance and as shown in the drawings, a block or head B may be
formed at the end of A. and the two bearing pieces CC be attached thereto by
bolts DD. These hearing pieces have journalled into them, what may be termed,
the movable holder, that is to say the piece which directly carries or holds the bolt
or the like, and which, when the latter has been screw threaded, can be moved so
as to invert the bolt or the like, whereupon it will fall by gravity out of the
machine. The movable holder consists of a piece, or as shown of two pieces E' F¹
bolted together, provided on the one hand with pivotal pieces E E and on the
other hand with a slot F. To complete the parts a handle G is provided fixed to
either one of the pivotal pieces E E, for instance and as shown by a square pin H,
and further a guide ring I is made use of which may be tapped into the
end of B.
The mode of action is as follows:-
The parts being in their normal position as shown in Figures 1, 2, 3 and 5, the
workman inserts into the slot F the bolt, or other article, which he wants to

page_text: be screw threaded by the apparatus or machine to which these improvements are
applied.
For convenience of description and illustration a bolt is shown and described as
being screw threaded; it will be understood; however, that the invention may be
equally well used in connection with other articles, the parts, if necessary, being
suitably modified to suit the shape of the other articles. When the workman has
inserted the bolt into the slot F, as has been mentioned, the exterior edge of the
guide ring I will be a stop to the head of the bolt, thereby acting as a control so
that the bolt can only be introduced the proper distance into the apparatus or
machine; the apparatus or machine then continues to work, the shaft A being
revolved in any of the ordinary ways, the end of the bolt, catching into the dies,
will be prevented from slipping down out of the slot when the inovable holder
owing to the revolution of the shaft A comes upside down. When the bolt has
been screw threaded on a sufficient portion of its length, it is then released from
the dies, the workman will simply have to turn down the handle G when the
carrier piece will rise round on its pivotal pieces E E in the bearing pieces CC so
that the bolt as shown in Figure 4 will come into a position directly over the guide
ring I and will then fall out of the slot F down through the guide ring I into any
convenient place or receptacle; after which the movable holder is again brought
into its normal position ready for the insertion of another bolt when the same
operations can be gone through.
On the drawings, J is a stop bolt for the purpose of preventing the movable
holder being turned too far back, whilst K is a check pin which may be employed
if desired for additional security, in case the handle G has a tendency to move
whilst the shaft A with its block or head B is revolving.
LL are two small tapped holes provided for the purpose of screwing to the
movable holder a plate armed with a tapping tool so that it does not become
necessary to change machines in case an article, such as a nut, is wanted to be
screw threaded internally.
It will, we believe, be found advantageous to apply to the shaft A at a suitable
point in its length, a fixed nose or projection, which, when the bolt or equivalent
article has been screw threaded to a sufficient length and has been withdrawn from
the dies and when the movable carrier is in its vertical position, will rest against or
come under the influence of a stud or its equivalent placed at a suitable part and
thereby the parts be momentarily stopped, so that the workman will become aware
that it is time to move the handle G.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is
1. In an apparatus or machine for cutting or forming screw threads upon bolts
and the like, the employment of a movable holder for receiving the bolt or the
like to be screw threaded, capable of turning in bearings so as to bring the bolt or
the like when wanted into an inverted position, whereby it will fall out of the
machine owing to its own weight substantially as herein before described and
shown.
2. In combination with a movable holder substantially as and for the purposes
hereinbefore described, the employment of a guide ring I, the whole arranged
substantially as hereinbefore described and shown.
3. The construction and general arrangement of parts, taken as a whole, for use,
as herein before described, in an apparatus or machine for cutting or forming screw
threads upon bolts and the like, all arranged substantially as hereinbefore described
and shown.
4. In connection with a screw cutting apparatus or machine having a movable
carrier as has been herein before described and shown, the application to the
shaft A of a fixed nose or projection, coming in contact with a stud or its

page_text: equivalent so that the parts will be momentarily stopped when the workman has to
move the handle G.
Dated this 5th day of February 1892.
WM. P. THOMPSON & Co.,
Of Liverpool, Manchester, Nottingham, and London, Patent Agents.