Improvements in Obtaining Rotary Motion from Lineal Motion, and Lineal Motion from Rotary.
Year: 1897

page_text: Date of Application, 16th Feb., 1897-Accepted, 12th Feb.,
1898
COMPLETE SPECIFICATION.
Improvements in Obtaining Rotary Motion from Lineal Motion, and
Lineal Motion from Rotary.
I, ROBERT COOKE SAYER, of 11, Clyde Road, Redland, Bristol, Civil 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:
GENERAL DESCRIPTION.
A rod is provided with a right and left handed spiral threads into which the
right and left ends of a double pawl are alternately thrust by inclines formed at the
ends of the spirals. The pawl is rigidly fixed centrally but able to receive a
rocking motion when the rod is thrust either way, by the incline at one end of a
spiral raising it and passing its other end into the other spiral: the rod receives a
continuous rotary motion by one spiral acting against one end of the pawl and
rotating it in one direction, and when its incline has thrust the other end of the
pawl into the other spiral and the direction of the rod is reversed it again receives
rotary motion in the same direction. A wheel is fixed upon the rod by a key in
a continuous key way and rotates with it. When the wheel is rotated by turning
its handles, being attached, by a collar to a fixture, the rod is thrust either way.
When the power of cylinders is used it acts on a tube instead of the rod and is
keyed to them as well as the wheel or wheels. That their rotary motion may be
reversed a small rod carrying lugs passes within the tube and hinged levers travel-
ling with the inclines lower or raise them when they meet the lugs, to work the
pawl according to the direction of the tube and its spirals: that the direction of the
rotating wheels cylinders tube and rod may be changed the end of the small rod is
susceptable of different rotation to the tube, carries a screw thread into which
another held rigidly by the cylinder or wheel passes, which being traversed rotates
the small rod and its lugs and brings them in a line with the levers of the other
spiral inclines.
See the drawings where,
DETAIL DESCRIPTION.
Fig. 1 is a sectional plan of the rod, spirals and wheel.
Fig. 2 cross section showing the pawl.
Fig. 3 and 4 sections of the spirals and inclines for hand power.
Th

page_text: to like parts. 1 being the tube or piston rod, 11 its pistons, 9 and 10 its cylinders,
12 the small rod having lugs 13 and 14 screw spiral 15 by which its fellow 16 can
rotate it when traversed by a lever 17 acting through the fixed ring 18 and ring 19
that rotates on the arms 20 with the wheel 5 cylinder 10 and rod 12. The inclines
are lowered by their levers 23 that centre at 24 meeting the lug 13 or 14 according
to which end of the spiral approaches the pawl 7 and as it receeds the incline is
again raised by the other side of the lever 23 meeting the lug.
The working is as follows The pawl 7 Fig. 1, being in spiral 3, the rod 1 is
drawn out by the handle 4 and is turned as shown by the arrow the incline 22
meets the pawl 7 raises it and thrusts its other end into the end of spiral 2 which
has not an incline and the return of the rod 1 causes the pawl 7 to act on the
spiral 2 to give continued rotation in the same direction. When the wheel 5 is
turned, being retained by the collar 25 it thrusts the rod 1 in and out from and to
the pawl 7 by alternately causing the spirals 2 and 3 to take against it.
When it is desired to reverse the direction of the wheels 5 inclines 22, Figs. 5 to 8,
are used and when one approaches the pawl 7 in the direction of the arrow 26 its
lever 23 meets the lug 13 of the rod 12 and thrusts it over the spring incline 22
forcing it down, and it reaches the pawl 7 ready to receive its disengaged end': as
the incline 22 returns the lug 13 thrusts it up again, and incline 22 the other end
of the same spiral approaching the pawl 7 the lug 14 of rod 12 being in the path of
the lever 23 of the opposite incline 22, Fig. 8 it is kept up, thrusts up the end of
the pawl 7 for its other end to take into the opposite spiral. When the direction
of rotation is to be changed the lever 17 is thrown over, the spiral 16 is thrust in
or out, as the case may be, and rotates the rod 12 to bring the lugs 13 and 14 in
the paths of the other pair of levers 23 of their inclines 22.
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:
Reverse spirals 2 and 3 formed on a rod or tube and having fixed inclines 22,
or inclines 22 able to be raised or lowered by levers 23 as they meet lugs 13 or 14
on a rod 12 susceptable of relatively differing rotation from its normal with the
tube 1 by carrying a spiral thread 15 in which its fellow 16 rotating with the tube 1
can traverse in either direction and change the lateral position of its lugs 13 and 14
to allow either pair of the levers 23 of the inclines 22 to meet them in either
direction double ended fixed pawls 7 susceptable of a rocking motion when the
rod or tube is traversed to bring an incline 22 of one spiral to raise it and lowers
its other end into the other spiral, the incline 22 of which down, if provided, for
reversing the direction and thereby obtaining continuous rotary motion of a rod
or tube 1, cylinders and 10 and wheels 5: and reversing such motion sub-
stantially as described and shown on the drawings.
Dated this 15th day of Tob 1907