Improved Mechanism for Converting Reciprocating into Rotary Motion.
Year: 1890

page_text: COMPLETE SPECIFICATION.
Improved Mechanism for Converting Reciprocating into Rotary
Motion.
I, JAMES HAYTON of 317 S First East Street, Salt Lake City, in the County of
Salt Lake, and Territory of Utah, United States of America, Machinist, 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 relates to mechanical movements for converting reciprocating
motion into rotary motion; and its object is to provide a new and improved
mechanical movement for said purpose, which is simple and durable in construction
very effective and positive in operation and transmits the power without any undue
friction or lost motion, avoiding all dead centres.
The Invention consists of a frame fitted to slide and provided with two parallel
racks having their teeth facing each other, a segmental gear wheel having its teeth
extending to somewhat less than one-half of the circumference of the wheel, the teeth
being adapted to mesh alternately in the said racks and a shaft mounted to turn in
suitable bearings and carrying the said segmental gear wheel.
The Invention also consists of certain parts and details and combinations of the
same, as will be hereinafter fully described and then pointed out in the claims.
Reference is to be had to the accompanying drawings, forming part of this specifi-
cation, in which figure 1 is a side elevation of the improvement in a central position;
figures 2 and 3 aro like views of the same in the end positions; and figure is a
transverse section of the same on line x figure 1. Similar letters of reference indicate
corresponding parts in all the figures.
The improved mechanical movement A is provided with a suitably-constructed base
plate B adapted to be secured to the frame of the machine on which the mechanical
movement is to be applied. On top of the base plate B is arranged a longitudinally-
extending guideway to the sides of which are secured upwardly extending plates D
supporting at their upper ends a second guideway E, extending parallel to the guide-
way C.
In the guideways C and E is fitted to slide longitudinally a frame F
consisting of the two sides F1 and F2 and the ends F3 and F of which the latter are
provided with heads F and F in one of which is secured a rod G by means of a
pin H. The rod G is connected with the machinery the reciprocating motion of which
is to be converted into rotary motion. The sides F and F fit into the guideways E
and respectively and they are provided at their opposite edges with rack teeth F7
and I respectively, three only in number, as shewn in the drawings. The teeth F
and are adapted to be alternately engaged by teeth I formed on a segmental
wheel J secured by its hub J' on a transversely-extending shaft K mounted to turn
in suitable bearings L and also provided with a fly-wheel N and the usual pulley O
adapted to be connected with suitable machinery to be driven. In the ends F³ and F
of the frame F are arranged semi-circular openings F and Fi adapted to receive
alternately that half of the hub J' of the gear wheel J which is arranged opposite the
teeth I, see figures 2 and 3. As will be seen from the drawings, the teeth I extend
to somewhat less than one-half of the circumference of the segmental gear wheel J so
that when one end tooth leaves the end of the rack teeth F' or F the other end tooth
is in mesh with the corresponding end tooth on the opposite rack F or F', as herein-
after more fully explained.
The operation is as follows;-When a reciprocating motion is imparted by the rod G
to the frame Fa continuous rotary motion is transmitted by the mechanical
movement A to the shaft K in the following manner. When the frame F slides in
the direction of the arrow a¹, and is in the position shewn in figure 1, then the middle
tooth of the teeth on the side F' stands in the middle of the segmental gear wheel J
and by the action of the latter it is turned in the direction of the arrow 6', see figure 1,
וני.מז

page_text: When the frame F nears the end of its stroke, the segmental gear wheel assumes the
position shewn in figure 2, that is the last tooth on tho side is about to be dis
engaged from one end tooth of the seguiental gear wheel J which, by its other end
tooth, is about to be engaged by the first tooth of the other side F. The last two
tooth are in mesh with each other at the end of the stroke and the commencement of
the return stroke, so that when the frame is on the return stroke, the teeth Fe engage
the teeth and thereby direct the segmental gear wheel J in the direction of the
arrow until the frame F is at the end of its return stroke when the last tooth on the
side disengages the corresponding end tooth of the segmental gear wheel J and
the other end tooth of the latter is in mesh with the right hand tooth on the side F¹ so
that on the forward motion of the frame F the gear wheel J is again turned in the
direction of the arrow &' by the toeth F operating on the teeth I of the gear wheel J.
Thus it will be seen that a continuous rotary motion is imparted to the segmontal gear
wheel J and its shaft K by the reciprocating movement of the frame Fin the
gnideways Cand E. It will further be seen that the gear wheel J is free to engage
alternately the sets of teeth F and F on the oppositely-arranged sides and, as
part of the hub of the said gear wheel can pass into the recesses Fº and F1º in the
unds F and F of the said frame F. It will thus be seen that the reciprocating
motion is converted into a rotary motion without the use of pitmen and crank arms
and without any lost motion whatever. It will further be seen that the frame F, by
means of the heads F and F, can be readily attached to right or left handed
machines, as the said heads are adapted to receive rod G coming from the right
or left.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to ho performed, I declare that what I
claim is ;
1. A mechanical movement, comprising a frame fitted to slide and provided with
two parallel racks having their teeth facing each other, a segmental gear wheel
baving its teeth oxtending to somewhat less than one-half of the circumference of the
wheel, the teeth being adapted to mesh alternately into the said racks and a shaft
mounted to turn in suitable hearings and carrying the said segmental gear wheel,
substantially as shown and described.
2. In a mechanical movement, the combination, with parallel guideways, of a frame
fitted to slide in the said guide ways and provided with two parallel racks having
their teeth facing each other, a seginental gear wheel having its teeth extending to
somewhat less than one half the circumference of the wheel, the teeth being adapted
to mesh alternately into the said racks, and a shaft mounted to turn in suitable
bearings and carrying the said segmental gear wheel, substantially as shown and
described.
Dated this 6th day of biny 1890.
J. HAYTON.
By A. M. & Win. Clark,
53, Chancery Lane, London, Patent Agents.