Improved Means for Converting Reciprocatory into Rotatory Motion.
Year: 1895

page_text: Date of Application, 13th June, 1895
Complete Specification Left, 12th Mar., 1896-Accepted, 18th Apr., 1896
PROVISIONAL SPECIFICATION.
Improved Means for Converting Reciprocatory into Rotatory
Motion.
I JOHN REDFORD of 75 Rupert Street, Great Lever, Bolton, in the County
of Lancaster, Joiner, do hereby declare the nature of this invention to be as
follows:-
My said invention relates to improved means for converting reciprocatory into
rotatory motion and is applicable for example in the construction of fluid pressure
motors and other apparatus. For instance as applied to a steam engine I connect
the outer end of the piston rod or trunk to a sliding cross-head having a collar or
collars sliding upon a cylindrical revolvable body formed with spiral grooves and
carried in bearings, projections or bowls from the collar or collars engaging with
the said spiral grooves. The reciprocation of the piston rod in the usual manner
has the effect of rotating the spirally grooved cylinder to and fro, the amount of
rotation per stroke being fixed by the pitch of spiral, length of stroke and other
factors. Upon the end of the revolving and reversing cylinder I fix a toothed
pinion which gears with the toothed periphery of a sector suspended or mounted
upon a suitable pivot so that as the spirally grooved cylinder rotates to and fro, the
sector is also vibrated to and fro. The vibrating sector is connected by a connecting
rod to a crank on a crank shaft, the shaft being thereby revolved and imparting
rotatory motion in the ordinary manner. The arrangement of the parts com-
prising my improvements could be varied without departing from the spirit of
my invention.
An advantage derivable from my invention is that I am enabled to lengthen the
crank as compared with the available piston stroke.
Dated this 12th day of June 1895.
EDMUND CHADWICK, F.1.C.P.A.,
Agent.
COMPLETE SPECIFICATION.
Improved Means for Converting Reciprocatory into Rotatory
Motion.
I, JOHN REDFORD of 75 Rupert Street, Great Lever, Bolton in the County
of Lancaster, Joiner, do hereby declare the nature of my said invention and in
what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :-
My said invention relates to improved means for converting reciprocatory into
rotatory motion and is applicable for example in the construction of fluid pressure
motors and other apparatus. For instance, as applied to a steam engine I connect
the outer end of the piston rod or trunk to a sliding cross-head having a collar or
collars sliding upon a cylindrical revolvable body formed with spiral grooves and
carried in bearings, projections or bowls from the collar or collars engaging with
the said spiral grooves. The reciprocation of the piston rod in the usual inauner
has the effect of rotating the spirally grooved cylinder to and fro, the amount of

page_text: rotation per stroke being fixed by the pitch of the spiral, length of stroke and other
factors. Upon the end of the revolving and reversing cylinder I fix a toothed
pinion which gears with the toothed periphery of a sector suspended or mounted
upon a suitable pivot so that as the spirally grooved cylinder rotates to and fro, the
sector is also vibrated to and fro. The vibrating sector is connected by a connecting
rod to a crank on the crank shaft, the shaft being thereby revolved and imparting
rotatory motion in the ordinary manner. The arrangement of the parts com-
prising my improvements could be varied without departing from the spirit of my
invention.
An advantage derivable from my invention is that I am enabled to lengthen the
crank as compared with the available piston stroke.
Fig. 1-Sheet 1--is a longitudinal side elevation of my invention for converting
reciprocatory into rotary motion. Fig. 2-Sheet 2-a plan of same, and Fig. 3 an
end elevation of crosshead.
A is the cylinder of a steam engine or other fluid pressure motor; B piston rod;
C sliding crosshead; D the slide bars; E the slide blocks; F, F pedestals or
bearings; G spur pinion; H standards; I sector; J connecting rod; K crank
pin; L crank; M crank shaft; N pedestals for supporting crank shaft; O the
foundation plate for carrying or supporting the apparatus, and P the driving pulley,
which may be substituted by a rope pulley, spur or bevel gear or their equivalents
as required according to the class of machinery to be driven.
The rod or trunck B of the steam or other fluid pressure motor cylinder A is
attached to the sliding crosshead C, the ends of the latter being provided with the
blocks E which slide in the bars D mounted on the foundation plate O. The cross-
head C is provided internally with the projections Q which fit and slide in the
spiral grooves W on the cylindrical revolvable body R. The latter is carried and
supported in the bearings F mounted on the foundation plate 0. The recipro-
cating action of the piston rod B in the usual manner moves or operates the
crosshead C by. which the spirally grooved cylinder R is rotated to and fro, the
amount of rotation per stroke of the piston in the cylinder A being fixed by
the pitch of the spiral, length of cylinder, or other factors employed. Upon the
end of the revolving and reversing cylinder or body R is fixed the toothed pinion G
which gears with the toothed periphery S of the sector I; the latter being suspended
from or mounted upon the pivot or centre T in the bearings U on the top end of
the standards H to allow the sector I to vibrate to and fro as the spirally grooved
cylinder rotates. The sector I is attached by the connecting rod J to the crank L
on the crank shaft M, the latter being revolved thereby.
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 general arrangement, construction, and combination of parts composing the
improved means for converting reciprocatory into rotary motion, as hereinbefore
described and as illustrated in the annexed drawings.
Dated the 7th day of March 1896.
EDMUND CHADWICK, F.I.C.P.A.,
Agent.