IMPROVEMENTS IN ROTARY MOTORS
Year: 1882

page_text: LETTERS PATENT to William John Gurd of Sarnia in the County of Lambton
in the Province of Ontario in the Dominion of Canada, Gentleman for an
invention of "IMPROVEMENTS IN ROTARY MOTORS
"
PROVISIONAL SPECIFICATION left by the said William John Gurd at the
Office of the Commissioners of Patents on the 8th April 1882.
WILLIAM JOHN GURD, of Sarnia, in the County of Lambton, in the Province of
Ontario, in the Dominion of Canada, gentleman "IMPROVEMENTS IN ROTARY
MOTORS "
My improvements relate to rotary motors in which the pressure of any fluid acts
upon a series of sliding buckets confined in a circular casing and produces direct
rotary motion.
My improved motor consists of a circular casing containing the driving wheel
concentrically journalled upon such casing by the driving shaft, passing through
stuffing boxes. The induction and eduction orifices are in close proximity at the
rim of the casing internally divided by a projection or abutment suitably packed
under spring pressure.
The driving wheel consists of a hub of proportionately large diameter, the rim
of which works against the face of the abutment. This wheel carries the buckets,
consisting of rectangular bodies sliding radially in slots in the rim and web plate
of the wheel, each pair in the same straight line being connected by cranked or
slotted slides through or by which the driving shaft may pass, so that when one
bucket is receded by a cam near the eduction orifice, the opposite one is projected
and exposed to the pressure of the inflow, flaps of packing material being clamped
to the working faces. Each side of the rim of the wheel has a facing ring which
runs tightly in a corresponding flat groove in the side of the casing, its object
being to strengthen the wheel & to reduce leakage. A cam or guide plate upon
the sides of the casing keeps the buckets in their projected positions during the
requisite period of their respective revolutions.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said William John Gurd in the Great Seal Patent Offico on the
7th October 1882.
WILLIAM JOHN GURD, of Sarnia, in the County of Lambton, in the Province of
Ontario, in the Dominion of Canada, Gentleman, "IMPROVEMENTS IN ROTARY-
MOTORS."
The invention relatos to a rotary motor of that class wherein the inflow pressure
acts upon diametrically reciprocated buckets of the driving wheel, and the object
of the invention is to obtain uniformity of motion. The invention consists of a
cylindrical wheel-case having inlet and outlet apertures in close proximity, an
intervening abutment in frictional contact with a driving wheel concentrically
journalled within the case, said wheel having radially sliding buckets which are
receded and projected by cams in front of the abutment and locked after being
projected until again receded by cams on the heads of the wheel caso.
Fig. 1 is a plan of the interior of the cylindrical wheel case tho wheel reinoved
Fig. 2. is an end view of the wheel removed from the case
Fig. 3. is a section of the wheel on line Z. Z figure 2.
Fig 4. is a section of the case on line X X figure 1.
Fig. 5. is a plan of the inner side of the heads of the case with cam
Fig. 6. is. an end view of the wheel, the buckets and yokes removed
Fig. 7. is a section of the same on line Y. Y.
A, is the cylindrical wheel case having inlet B, and outlet C, in close proximity,
separated by a fixed abutment D, having an inclined face in frictional contact
with the driving wheel which is journalled concentrically in the case by shaft Q,
thus forming an annular water way between the wall of the case and the face of
the wheel of uniform area throughout its entire length, from the induction to the
eduction orifices, the abutment diverting the outflow and dividing it from the
inflow, which passes nearly around the wheel. The face of the wheel, and plate E,
connecting it to the hub, are radially slotted cruciformly up to the hub, and said
slots are occupied by sliding buckets F, which are diametrically connected by
yokos G, G, arranged crosswise, the shaft Q passing through the slots in the yokes.
The driving wheel has flat rims H, H, which run in annular grooves I, I, in the
heads of the case, and fit therein to run without leakage.
K, K, are cams affixed at the discharge outlet in advance of the abutment D, and
against which cams, the buckets successively impinge and are thereby forced.
inwards thus permitting the buckets to pass the abutment, and at the same time
project diametrically the opposite bucket to receive impulse from the inflow
through passage B, to drive the wheel. The buckets are connected so that a
projected bucket is yoked to a receded one, and whon projected are held inter-
mittently locked by cams J, J, on the heads of the case, which cams have contact
by the rotation of the wheel with the inner end of the projected bucket, and on
approaching cams K, K, the bucket passes froin engagement with cams J, J, and is
free to be acted upon by cams K to pass the abutment, after discharging the
water.
L, is a flat spring, one end fixed to a plate M or to abutment D, and to the
opposite free end is attached a plate N. O, is a sheet of packing or leather
underlying plate M, with a flap extending under plate N, to prevent leakage by
covering the joint between the wheel and abutment, the packing or leather flap
being held frictionally against the wheel by the tension of the spring exerted upon
plate N, assisted by pressure of the inflow.

page_text: P is a strip of packing or other flexible material secured to the ends of the
buckets to sweep the walls of the case and thereby prevent leakage while the
buckets are locked by the cams J, J.
The shaft Q is journalled in boxes on the heads of case A, a cap R screwing in
each box holding an internal packing, to prevent leakage.
When the motor is in operation, the inflow passes by the end of a closed bucket
at a quarter section from the inlet before striking a bucket fully projected at the
half section, the pressure remaining in said open or projected bucket during the
next quarter rotation of the wheel and discharges the water through the outlet
during the fourth quarter rotation, two buckets momentarily taking the inflow
until one is cut off by the full projection of the other intercepting the inflow.
I have herein specified the motor as applicable for operation by water, but I do
not confine myself to the use of any particular pressure, as steam and gaseous
fluids may be used with good results.
I claim as my invention
1. In a rotary motor the cylindrical case A, provided with induction and
eduction apertures B and C, cams K and abutment D, said abutment being pro- .
vided with plates M and N, packing O and spring L, in combination with a
concentric wheel mounted centrally upon a shaft within the casing and provided
with buckets F, and yokes E, substantially as and for the purposes described.
2. In a rotary motor the cylindrical case A, provided with the induction and
eduction apertures B and C, cam K, abutment D, said abutment being provided
with plates M and N, packing O, and spring L, and the cam J, in combination
with a concentric wheel mounted centrally upon a shaft within the casing and
provided with buckets F, and yokes E, substantially as and for the purposes set
forth.
In witness whereof I the said William John Gurd have hereunto set my hand
and cool this tonth day of Avat AT 1000