Improvements in Means for Imparting Longitudinal Motion to a Toothed Bar or Rack.
Year: 1898

page_text: Date of Application, 15th Sept., 1898
Complete Specification Left, 15th June, 1899-Accepted, 5th Aug., 1899
Improvements in Means for Imparting Longitudinal Motion to a
Toothed Bar or Rack.
I, EDWIN GODDARD, of 4, Harleyford Road, Lambeth, in the County of Surrey,
Engineer, do hereby declare the nature of this invention to be as follows:--
My invention relates to improvements in means for imparting longitudinal
motion to a toothed bar or rack directly from a rotary spindle.
According to my invention I form transversely upon a suitable rod or bar for
a length equal to the distance through which it will be required to travel, a
number of teeth forming a rack.
Gearing with this rack is a conical spiral worm which is fixed to one end of a
rotary spindle, and the longitudinal axis of which is arranged to pass through the
longitudinal axis of the bar to be moved.
This rotary spindle passes through a suitable bearing in the wall of a fixed
chamber or socket in which the conical spiral worm is mounted and is capable of
revolving, and is set at an angle to the toothed rod, so that one side of the said
worm gears with the teeth on the said rod.
The toothed rod passes through the fixed chamber or socket so as to be incapable
of rotary movement; and the end of the rotary spindle outside the said chamber
or socket is provided with suitable means whereby it may be rotated.
The conical spiral worm must be adapted to the pitch of the teeth on the bar,
and the said teeth must be of such form as to correctly co-operate with the said
worm.
The non rotating toothed bar is thus geared by a single worm directly to the
rotary spindle, and upon turning the latter to left or right the bar may be moved
longitudinally in either direction as required.
Datal thi tit lure of Que
1000
HASELTINE, LAKE & Co.,
43, Southampton Buildings, London, W.C.,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Means for Imparting Longitudinal Motion to a
Toothed Bar or Rack.
I, EDWIN GODDARD, of 4, Harleyford Road, Lambeth, in the County of Surrey,
Engineer, do hereby declare the nature of this invention and in what manner

page_text: the same is to be performed, to be particularly described and ascertained in and
by the following statement:-
My invention relates to improvements in means for imparting longitudinal
motion to a toothed bar or rack.
According to my invention I impart longitudinal motion to a toothed bar or
rack from a rotary spindle through the medium of a conical spiral worm whose
axis of rotation is arranged transversely to the plane of the rack teeth.
In order that my invention may be clearly understood and readily carried into
effect I will proceed to describe the same more fully with reference to the accom-
panying drawings in which:-
Figure 1 is a side view of the apparatus.
Figure 2 is a longitudinal sectional view of Figure 1.
Figure 3 is a front view of the toothed bar or rack showing the formation of
the teeth thereof.
Figure 4 is a plan of the conical spiral worm.
A is a case or socket having a tubular projection a. 13 is the toothed bar or
rack which passes freely through suitable openings in the case A but which is
incapable of moving angularly about its longitudinal axis. The teeth of the
rack B are of the form shown in Figure 3. Cis the conical spiral worm which
engages with the rack B and is enclosed in the case or socket A. J) is the spindle
which carries the worm C and is journaled in the tubular projection of the
case A. E is a handle which is secured to the outer end of the spindle D.
The conical spiral worm C is adapted to the pitch of the teeth of the rack B
and is placed at an angle to the said rack, so that one side only of the said worm
engages with the teeth of the rack.
The case or socket A is provided with lugs whereby it may be secured in any
required position.
When the spindle D is rotated by the handle E, longitudinal movement is
imparted to the toothed bar or lack B.
The apparatus is especially useful for operating windows and sky-lights.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:
1. The combination with a toothed bar or rack of a conical worm whose axis of
rotation is transverse to the plane of the rack-teeth for the purpose specified.
2. Apparatus for imparting longitudinal movement to a toothed bar or rack
constructed arranged and operating substantially as described with reference to
the accompanying drawings.
Dated this 15th day of Tun 1900
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.