

Mr. Rider's Rotatory Steam- Engine. 267 



Should you think any farther information than what is now 

 communicated necessary, I shall feel great pleasure in affording it. 



I am, Sir, 



Your most obedient servant, 

 J. RIDER. 



Description of a Patent Rotatory Steam-Engine, manufactured by 

 Job Rider and Co., Belfast. 



Plate IX. The two figures show the parts of a twenty-horse 

 engine, the same marks of reference are used to denote the same 

 parts in both. Fig. 1, is a section cut through the centre at right 

 angles to the axis. Fig. 2, is a middle section cut through the 

 centre of the axis. 



Fig. 1 and 2, the fixed parts are aaaa ; the outside cylinder has 

 a flanch bb near each end, and two internal eccentrics cc ; on the 

 outside of it are two flanched branches — >, one of which con- 

 nects the engine with the boiler, the other with the condenser. It 

 is covered with two ends, eeee, (as shewn in Fig. 2,) each end hav- 

 ing a centre flanched branch, into which is fitted a flanched socket 

 DD, screwed down on hemp packing, shewn by dotted shade. 



The revolving parts are 1, 1, the inside cylinder (which is fixed 

 on the axis 2.2.2.2.) has six cavities, or interstices, d.d.d., into 

 which are fitted sliding valves 3.3.3.3. ; upon each end of it are 

 fitted fianches (Fig. 2,) 5.5.5.5. shewn by the sloping lines; these 

 flanches are screwed together through the arms of the cylinder, as 

 shewn by 6.6.6.6. (Fig. 1,) each flanch having grooves proceeding 

 to its extremity, equal in depth to the rabbet of the flanches upon 

 the cylinder, and coresponding with the valve recess dd, in the in- 

 side cylinder 2.2.2. The sliding valves are made to work steam 

 tight in these grooves ; they are connected by ground steel pins, 

 which pass through the axis, as shewn in Fig. 2, by 4.4.4.4. These 

 pins keep the edges of the sliding valves close to the (fixed) out- 

 side cylinder, both in its eccentric and concentric parts (as shewn 

 Fig. 1,) during the time that the inside cylinder, with its flanches 

 and sliding valves, are turned upon their axis. 



The sliding valves are at their full extent when passing the 



