IMPROVEMENTS IN ROTARY MOTORS
Year: 1882

page_text: PROVISIONAL SPECIFICATION left by Edwin Ambrose Brydges at the
Office of the Commissioners of Patents on the 1st May 1882. A communi-
cation by Alexander Sieckenius, of the town of Gleiwitz in the Kingdom of
Prussia and Empire of Germany.
EDWIN AMBROSE BRYDGES of the firm of Brydges & Co Engineers and Patent
Solicitors of 6 St. Leonard's Terrace Upton in the County of Middlesex and of
the City of Berlin in the Empire of Germany
66 IMPROVEMENTS IN ROTARY
MOTORS A communication by Alexander Sieckenius of the town of Gleiwitz in
the Kingdom of Prussia and Empire of Germany
33
This invention relates to improvements in rotary motors and especially
I to the attainment of a precise action of the expansion gear
II to the construction of the drum or piston
III to the packing of the said drum or piston and the rings of the same and also
to the slide, and to the closing of the said slide by means of an air buffer or spiral
springs.
Steam enters the cylinder through the inlet valve and drives round the drum or
piston or causes the same to revolve
The slide remains closed until the same is raised by the curve attached to the
periphery of the said drum.
After the passage of the said piston the slide is closed again by means of an
air-buffer or a spiral spring may be employed for the same purpose.
The exhaust steam passes out at the exhaust pipe; an excentric by means of
suitable connection levers operates on the pawl of the expansion governing
apparatus, the governor of which is driven direct from the axle or shaft of the
fly wheel by means of suitable pullies or drums.
By the employment of this apparatus which is in direct communication with the
inlet valve of the cylinder, any desired degree of expansion is possible.
The drum or piston is keyed on to the axle or shaft of the fly wheel and is
rendered tight against the walls of the cylinder by means of suitable rings in the
sanie.
These rings can be pressed up by means of spiral springs, which are adjustable
from the outside.
The front packing ring is entire whereas the rear ring is slotted.

page_text: In order to prevent the springs from becoming warm by the heat of the cylinder
and thus losing their elasticity the same are enclosed in an open cylinder tube or
casing outside of the cylinder.
The tightening of the rings against the drum or piston is produced by a spring
which is put under tension by means of two screws and which presses against a
bolt or pin which bolt or pin transfers the pressure on to the rings.
The said bolt or pin is provided at the rear with a square flange and and this
enables the stuffing box to be drawn up and tightened by means of a nut.
After the stuffing box is tightened up the nut is loosened and the spring begins
to act In order to prevent the stuffing box from working out a small channel or
orifice is so arranged that steam from the cylinder enters and presses against the
stuffing box, in which case the spring must be stronger than the steam pressure
upon the bolt or pin.
Those surfaces of the drum or piston packing or tightening rings, which press
against the said drum or piston are provided with cavities or recesses which in
consequence of their alternate positions continually lubricate the working or sliding
surfaces and thus prevent the rings from becoming stuck or jammed with the drum
or piston ie preventing the piston from firing.
Such said cavities or hollows must be narrower than the slide.
As already stated the drum or piston is provided with a curved projection or
extension which is cast or made of one piece with the body of the said drum or
piston,
The strip or lath which by the pressure of adjustable springs tightens the upper
surface of the piston or drum against the cylinder may be made of metal or other
suitable material. Suitable pieces of metal or other material are let in at the sides
for performing the same service, these said pieces are each pressed out by means of
adjustable spiral springs.
A modification of the method of tightening or packing the piston may be
employed in which small tapered metal plates are forced apart by a conical wedge
piece.
The cavity or recess for the bolt or screw in the drum or piston is covered by a
small metal plate.
If the motor is to be employed as pump or blowing engine or ventilator, the
drum or piston can also be provided with leather packing.
The tightening of the upper part of the piston may also be effected by means of a
suitable strip or rod in which slots are planed for carrying the side tightening or
packing strips.
These said strips are caused to press against the cylinder by means of springs.
By the pressure of the steam acting upon the slide the front surface of the same
is pressed steam tight upon its bearings or guides, upon which it is ground or
the packing of the slide may be effected by means of inlaid copper strips, or
strips of other suitable metal which expands more than the iron; the former
method of tightening the slide is however preferable on account of its simplicity.
When the motor is employed for creating a blast the drum or piston is provided
with cavities or recesses at the side in which by the operation of the said drum or
piston air is collected.
The speed of the drum or piston compresses the air to such an extent that the
coid oir acts as packing