Improvements in Screwing and Tapping Machines.
Year: 1895

page_text: Date of Application, 28th Nov., 1895
Complete Specification Left, 23rd July, 1896-Accepted, 3rd Oct., 1896
PROVISIONAL SPECIFICATION.
Improvements in Screwing and Tapping Machines.
THOMAS HEATH No. 19 Ordnance Road Enfield Lock in the County of Middlesex
Engineer do hereby declare the nature of this invention to be as follows:-
This machine is for the purpos of scrwing the spokes of bycycles and other
machines the important feture of which is that I form upon the revolving spindle
a master screw thread (internal or external) in such a maner that the spindle is.
advanced and withdrawn exactly at the same speed or pitch as the thread to be
cut upon the spoke.
In carrying out my invention I provide a headstock with two upright hornes theas
hornes are bored throug in a true line so that the axis of the two holes are true
one with the other, in one of thease holes is fitted a split die bored to the size of
the wire spoke to be screwed which is tightened tharein by meanes of a set screw,
the other horn before mentioned carries a revolving spindle, in the end of which
is the screwing die but an important part of my invention is the providing a
screw thread upon the outer circumferance of the above mentioned spindle (or
the same may be an internal screw) this thread coresponds in pitch with the
thread desired to be cut upon the spoke and the hole in the horn before mentioned
is also screwed to recive the spindle, thus when the spindle is revolved it advances
acording to the pitch of thread upon the spindle thus the stress and pull upon
the spoke in screwing is avoided the master screw upon the spindle giving the
required feed, I do not confine myself to screwing spokes as wire of any description
may be screwed by theas machines, taping may also be don.
Dated this 26th day of November 1895.
Improvements in Screwing and Tapping Machines.
THOMAS HEATH of 19 Ordnance Road Enfield Lock in the County of Middlesex
Engineer 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 :-
The object of this invention is to provide a simple and reliable screwing machine
more especially for the purpose of screwing the spokes of bicycles and other
similar machines and also for the purpose of tapping the holes in the hub of the
wheel to receive the spokes and for other similar purposes.
The feature of novelty I claim in this screwing machine is the master thread
upon or within the spindle working into a corresponding nut in such a manner
as to advance said spindle when revolved at the same speed or pitch as the hole
to be tapped or spoke to be screwed as hereinafter set forth in the accompanying
drawings.
Figure 1 is a side elevation of my screwing machine partly in section.
Figure 2 is a plan view of the same.
Figure 3 is an and view showing 19.
1.

page_text: Figure 4 is an end and side view of holding die for spoke.
Figure 5 is a side and end view of screwed spindle.
Figure 6 is an end view of hand wheel and screwed spindle.
Figure 7 is a side and end view of screwed bush to receive the spindle similar
characters of reference indicate similar parts in the respective views.
Referring now more particularly to Figures 1, 2, 3 and 4 D represents the head-
stock bored to receive the holding die A for spoke, said die being split part of its
length to enable it to tighten the spoke centrally therein by means of holding down
screw F. The opposite end of the headstock D is bored to receive the internally
screwed bush C into which is screwed the spindle B bored to receive the screwing
die or tap as shewn. Upon the opposite end of the spindle is mounted a hand
wheel C keyed thereon or otherwise secured.
Figure 5 is a view of the screwed spindle.
Figure 6 is an end view of hand wheel by which the spindle is revolved.
Figure 7 is a view of screwed bush (for the reception of the spindle the thread
upon the spindle corresponds in pitch with the thread upon the tap or within the
screwing die and as the spindle is revolved by means of the hand wheel the spindle
is advanced by the screw thereon and thus keeps the tap up to its work and
prevents the stripping of the thread from the spoke to be screwed or from the hole
to be tapped.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. A master thread upon or within the spindle of a screwing machine working
within a corresponding nut substantially as set forth.
THOMAS HEATH.