Improvements in Apparatus for Converting Reciprocating into Circular Motion, suitable for Drilling and other Purposes.
Year: 1892

page_text: Date of Application, 19th Oct., 1892
Complete Specification Left, 14th July, 1893-Accepted, 19th Aug., 1893
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Converting Reciprocating into
Circular Motion, suitable for Drilling and other Purposes.
I, JOHN HENRY GRIFFITHS of Nevitt's Building, Lincoln Hill, Ironbridge, in
the County of Salop, Engine Fitter, do hereby declare the nature of this invention
to be as follows:-
This invention has reference to improvements in apparatus for converting
reciprocating into circular motion of the kind in which a screw threaded rod or
other rotary body is rotated by a reciprocating nut. In such apparatus as herein-
before constructed the direction of rotation of the rod or body is changed with
each change of direction of the nut, and my invention has for object to cause the
said rod or body to always rotate in the same direction.
For this purpose 1 form the rod or body (hereinafter referred to as a spindle)
with right and left handed screw threads or spiral grooves, and upon the spindle
thus formed is mounted two nuts each adapted to engage with one of the screw
threads or spiral grooves and with a holder capable of being reciprocated by the
hand or otherwise, the arrangement being such that when the holder is moved in
one direction it will engage with and move one of the nuts in one direction and
rotate the shaft by the action thereof on one of the screw threads and when the
holder is moved in the opposite direction it will engage with and move the second
nut which by acting on the other screw thread or threads will rotate the spindle
in the same direction as before, the nut that is for the time being out of engagement
with the holder being inoperative.
The holder may conveniently be made in two parts screwed together and be
formed with clutch teeth to engage with corresponding clutch teeth on the adjacent
ends of the nuts.
In one arrangement suitable for use as a drill, the spindle is provided at one
end with a socket for a drill, and at the other end is pivoted in a handle, rings of
elastic material to serve as buffers for the holder being fixed to the spindle near
its ends.
W. LLOYD WISE,
Per F. J. Brougham,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicant.
COMPLETE
SPECIFICATION.
Improvements in Apparatus for Converting Reciprocating into
Circular Motion, suitable for Drilling and other Purposes.
I, JOHN HENRY GRIFFITHS, of Nevitt's Building, Lincoln Hill, Ironbridge, in
the County of Salop, Engine Fitter, 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 has reference to improvements in apparatus for converting
reciprocating into circular motion of the kind in which a screw threaded rod or
other body is rotated by a reciprocating nut. In such apparatus as heretofore
constructed the direction of rotation of the rod or hody is changed with each
change of direction of movement of the nut, and my invention has for object to
cause the said rod or body to rotate always in the same direction when the nut is
reciprocated.

page_text: wing and felt handed screw threads or spiral grooves (hereinafter referred to
as screw threads) and upon the spindle thus formed are mounted two nuts; one of
which is adapted to engage with the right handed screw thread or threads and the
other with the left handed screw thread or threads, the said nuts being adapted
to engage alternately with a holder capable of being reciprocated by hand or
otherwise, the arrangement being such that when the holder is moved in one
direction it will move the nuts in the same direction and will engage with one
nut so as to prevent it rotating during its longitudinal movement in that direction
and thus rotate the shaft by the action of the said nut on the screw thread or
threads with which it is in engagement, and when the holder is moved in the
opposite direction it will move the nuts in that direction and similarly engage with
the second nut, which by acting on the other screw thread or threads, will rotate
the spindle in the same direction as before, the nut that is for the time being out of
engagement with the holder being inoperative.
In the accompanying illustrative drawings,
Fig. 1 is an elevation, partly in section, of a hand drill constructed according to
this invention.
Fig. 2 shows partly in longitudinal section and partly in elevation a modified
arrangement for connecting the drill spindle to its handle.
Fig. 3 shews in elevation the nuts for rotating the drill spindle, and the parts of
the holder for reciprocating the nuts, the several parts being shown detached from
each other.
Fig. 4 is an end view of the inner toothed end of one of the bosses forming part
of the said holder; and
Figs. 5 and 6 are end elevations of the two nuts as seen from their inner ends.
1 is the drill formed with two right handed screw threads 2 and 2ª and two left
handed screw threads 3 and 3ª and provided at one end with a drill socket 1" and at
the other end with a handle 4 to which the spindle is connected in such a way that
it is free to rotate therein. For this purpose the spindle may as shown in Fig. 1
be secured within the handle by means of screws 4 that are screwed through the
side of the handle and project into a circumferential groove 4° formed near the end
of the spindle. Or the end of the spindle may as shown in Fig. 6 have fixed
thereto a collar 4° arranged to work in a corresponding recess 4d in the handle which
in this case is made in two parts 4 4* suitably connected together. In each case
the handle may advantageously be fitted with a steel centre or thrust block 5
formed with a recessed conical bearing to receive the correspondingly formed
adjacent end of the drill spindle when drilling. and 7 are two nuts mounted upon
the drill spindle and formed with internally projecting portions 6 and 7* of screw
threads as shewn in Figs. 5 and 6, the portious 6ª of screw threads formed upon
the nut 6 being such as to engage with the two right handed screw threads 2 and 2"
and those (7) upon the nut 7 being such as to engage with the left handed screw
threads 3 and 3ª. The nuts are formed at their outer ends with clutch teeth 8 and
are retained within a holder which in the example shown consists of two externally
screw threaded bosses 9 9ª screwed into an intermediate tubular part 10 provided
with handles 11 by which the holder and consequently the nuts 6 and 7 can be
moved to and fro along the spindle 1. The bosses 9 and 9ª are formed at their
inner sides with clutch teeth 12 adapted to gear with the teeth 8 on the adjacent
ends of the nuts, and are arranged sufficiently far apart to allow each nut in turn to
freely rotate when the teeth 8 of the other are in engagement with the teeth 12 of
the adjacent boss 9, or 9º.
The drill spindle is provided near each end with a ring 13 of elastic material
such as india rubber which acts as a buffer against which the holder can come in
contact at each end of its stroke.
With the construction described when the holder is moved in the direction of
the arrow a (Fig. 1) the teeth 8 of the nut 7 will be engaged with the set of
teeth 12 on the adjacent boss 93 of the holder as shewn, whereby the said nut will

page_text: be prevented from rotating and the spindle 1 will be rotated by the said nut in the
direction of the arrow b, the nut 6 which is free during this stroke, rotating idly in
the reverse direction by reason of its connection with the right hand screw
threads 2, 2ª of the spindle. On the return stroke of the holder, the nut 7 will be
disengaged from the toothed boss 9" and the nut 6 will become engaged with and
be driven by the toothed boss 9, and since this nut engages the right hand screw
thread 2 and is now moving with the holder in an opposite direction to the arrow a,
the drill spindle will be rotated in the same direction as before, the nut 9 being
idly rotated in the opposite direction by reason of its connection with the left hand
screw threads 3, 3".
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. Apparatus for converting reciprocating into circular motion in one direction
comprising a spindle formed with right and left handed screw threads, nuts mounted
thereon one of which is adapted to engage with the right screw thread or threads
and the other with the left handed screw thread or threads and means whereby the
said nuts can be moved to and fro along the said spindle whereby each of them in
turn can be prevented from rotating substantially as herein described for the purpose
specified.
2. Apparatus for converting reciprocating into circular motion in one direction,
comprising a spindle formed with right and left hand screw threads, and provided
with a handle in which it is free to rotate and with means for attaching a tool such
as a drill, two nuts mounted upon the said spindle, and adapted to engage with the
said right and left handed screw threads respectively and formed with clutch teeth,
and a holder also formed with clutch teeth, the arrangement being such that upon
the said holder being moved to and fro along the spindle the nuts are similarly
moved and alternately prevented from rotating according to the direction in which
they are being moved whereby the said spindle is rotated in the same direction by
each nut acting in turn substantially as herein described.
3. The improved apparatus for converting reciprocating into circular motion
constructed, arranged and operating substantially as herein described and shewn in
the accompanying drawings.
" TI
1000
0002
W. Lloyd Wise,
J. H. GRIFFITHS.
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicant.