Improvements in Sleeves or Collars for Transmitting Rotary Motion to Worm Screws.
Year: 1896

page_text: Date of Application, 19th May, 1896-Accepted, 20th June, 1896
COMPLETE SPECIFICATION.
Improvements in Sleeves or Collars for Transmitting Rotary Motion
to Worm Screws.
I, JOHN MARION RAUHOFF, of 225 Dearborn Street, Chicago, Cook County,
Illinois, United States of America, 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 my invention is to facilitate the movement of a worm screw
through the sleeve or collar by which it is rotated, and the invention consists in
features and details of construction hereinafter described and claimed.
In the drawings
Figure 1 is a side elevation showing a worm screw and its collar or sleeve;
Fig. 2 a transverse section taken in line 2 of Fig. 1 ;
Fig. 3 an end elevation of a section taken in line 3 of Fig. 2; and
Fig. 4 a transverse section showing a modified form in which the invention is
applied.
In making my improvement in worm screws, I have found that it is applicable
to a great many different forms, and may be used in a great many different ways.
I have illustrated two forms in which it may be used, but intend them simply as
samples and desire it to be understood that I intend in my claims to cover the
principle broadly so that departures may be made from the specific examples or
illustrations shown in the drawings. In the example shown, I make a worm
screw, A, either by providing its rod or shaft with a spiral groove or grooves, a,
or by providing it with spiral flanges, a¹. This modified form of worm screw is
shown in Fig. 4, where it is indicated by the letter, A.
I shall use the term "bearing surface" to indicate either the spiral grooves or
the spiral flanges, so that either will be understood as comprehended by the term.
I make a sleeve or collar, B, which may be moved in any appropriate way and
by any appropriate motive power back and forth on the rod or shaft, though if
preferred the sleeve or collar may remain in a stationary position and the rod or
shaft moved back and forth through it by any appropriate means. In the sleeve
or collar, I arrange balls, C, adapted to rest against the bearing surface of the
rod or shaft. These balls are arranged in pockets or recesses in the collar
adapted to receive them so that they may turn freely therein and I prefer to
employ a number of small balls or steel shot, c, to facilitate the turning of the
balls in their recesses or pockets. The object of these balls is to obviate friction
and to enable the sleeve to be moved on the rod without difficulty or wear in
the parts.
In the illustrations I have made the pockets or recesses for the balls in the ends
of the screw plugs, D, which are then screwed into the screw threaded holes in
the sleeve or collar adapted to receive them. These plugs may be more securely
held in place by a jam or lock nuts, d, so that when they are adjusted they will
remain in the desired position to keep the balls in proper contact with the bearing
surface of the rod and shaft.
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:
The combination of a rod or shaft provided with a spiral surface of long pitch,

page_text: a non-rotary collar or sleeve surrounding the rod or shaft and adapted to impart a
rotary movement to it by a sliding of the one or the other in a direction longi-
tudinal to the axis of the rod or shaft, and balls resting on balls and interposed
between the collar or sleeve and the spiral bearing surface of the rod or shaft so
as to be operated by contact therewith, substantially as described.
Dated this 19th day of May 1896.
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.