Device by which of the Thread or Slot of a Sorew, or Combination of such, Produces a Transverse Motion upon a Suitable Stud or Traveller.
Year: 1893

page_text: Date of Application, 26th Sept., 1893
Complete Specification Left, 26th Jan., 1894-Accepted, 3rd Mar.,
1894
PROVISIONAL SPECIFICATION.
A Device by which the Rotary Motion of the Thread or Slot of a
Sorew, or Combination of such, Produces a Transverse Motion
upon a Suitable Stud or Traveller.
I ALFRED LYON WOOLHOUSE of 12 North Side Clapham Common London
S.W. Engineer do hereby declare the nature of this invention to be as follows:-
Upon a portion of the length of a spindle is cut an endless worm, or thread, or
slot traversing the spindle at an angle to its diameter in one direction until the
required distance is reached, then traversing the spindle at a less angle during part
of one revolution gradually reversing the angle and returning round the spindle at
an opposite angle and intersecting the before mentioned thread, until the required
distance is reached in the contrary direction; making again the before mentioned
revolution and running into the first mentioned thread completing the traverse.
This spindle is furnished with a boss or travelling socket, (hereafter called the
traveller) fitted with a stud, which stud engages the thread of the screw this stud
being sufficiently loose to adjust itself to the varying pitch or angle of the thread,
and sufficiently long on the face to guide itself in the direction in which it is
travelling across the intersections of the reverse thread. It is evident that if a
rotary motion be given to the spindle and the traveller be prevented from revolving,
the stud, (and consequently the traveller) will be propelled along the spindle in a
direction parallel to its axis, and upon arriving at the point where the thread, in
encircling the spindle, reversés gradually its angle or pitch will continue to travel
the spindle now in the opposite direction still guided by the thread now traversing
the spindle at an opposite angle, this return motion taking place similarly at each
extremity of the screw.
It is also evident that if the traveller he caused to revolve and the spindle be
prevented from taking a rotary motion, the spindle itself will now travel backwards
and forwards through the traveller, guided by the stud before mentioned.
Dated this 25th day of September 1893.
ALFRED LYON WOOLHOUSE.
COMPLETE SPECIFICATION.
A Device by which the Rotary Motion of the Thread or Slot of a
Screw, or Combination of such, Produces a Transverse Motion
upon a Suitable Stud or Traveller.
1, ALFRED LYON WOOLHOUSE of 61 Stafford Street, Derby in the County of
Derby, Engineer, late of 12 North Side, Clapham Common, London, S. W. 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 my invention is to provide an improved device or means for
obtaining or producing from a rotary mechanical motion a to and fro or thrust and
return mechanical motion.
Referring to the drawings which form a part of this Specification:-
Figure 1 is a side elevation shewing an application of my improved device.
Figure 2 is a section on line "a (2 of Figure 1.
"
Figure 3 is an elevation of a stud to be hereafter described.

page_text: Upon a portion of the length of a spindle A is cut an endless worm, thread or
slot B traversing the spindle at an angle to its diameter in one direction, until the
required distance is reached, then traversing the spindle at a less angle during part
of one revolution gradually reversing the angle at C and returning round the spindle
at an opposite angle and intersecting the before mentioned thread, until the required
distance is reached (say at D) in the contrary direction; making again the before
mentioned revolution and running into the first mentioned thread and completing
the traverse.
This spindle is furnished with a boss or travelling socket E (hereinafter called
the traveller) fitted with a stud F, which stud engages the thread of the screw, the
said stud being sufficiently loose to adjust itself to the varying pitch or angle of the
thread, and sufficiently long on the face to guide itself in the direction in which it
is travelling across the intersections of the reverse thread.
.It is evident that if a rotary motion be given to the spindle A and the traveller E
be prevented from revolving, the stud F (and consequently the traveller) will be
propelled along the spindle in a direction parallel to its axis and upon arriving at a
point where the thread, in encircling the spindle, reverses gradually its angle or
pitch, will continue to travel the spindle now in the opposite direction still guided
by the, thread now traversing the spindle at an opposite angle, the return motion
taking place similarly at each extremity of the screw.
It is also evident that if the traveller E be caused to revolve and the spindle A
be prevented from taking a rotary motion, the spindle itself will now travel back-
wards and forwards through the traveller, guided by the stud before mentioned.
I may also as an alternative cut an endless and return worm, thread or slot such
as previously described inside a socket or boss such as E and form on or fit to a
plain spindle a suitable stud to travel in the said worm, thread or slot of the said
socket or boss and produce the desired mechanical motion by these means.
It will be understood that. I may vary the size and shape and also the con-
struction of the various parts and the pitch of the screw or worm without departing
from the spirit of my invention, for instance I may use a slower or quicker thread
and vary the same in one device if necessary and form the different parts in one or
more pieces as desired. It is evident that I may employ. two or more parallel
threads with a corresponding number of studs or travellers, to ensure more perfect
running and to obtain sufficient strength without departing from the spirit of my
invention.
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. The improved device for obtaining or producing from a rotary mechanical
motion a to and fro or thrust and return mechanical motion consisting of an endlessly
threaded spindle A with a socket or traveller E and stud F substantially as
described and illustrated.
2. The improved device for obtaining or producing from a rotary mechanical
motion a to and fro or thrust and return mechanical motion consisting of an internally
endlessly threaded socket or traveller and a plain spindle carrying a suitable stud
to engage the said thread substantially as described.
Dated this 26th day of January 1894.
W. SWINDELL,
Agent for the Applicant.