404 Description of a Rotative Steam Engine. 



cess being made in that segment which is opposite the door 

 for that purpose; during which time the elastic fluid is shut 

 out; but it enters again when the door leturns fo its seat, 

 and thus the operation continues. 



The preceding particulars are drawn from Mr. Clegg's 

 specification oF his invention. For the following, by which 

 we are enabled to make our readers acquainted with all the 

 parts of a steam engine on this construction, but which 

 being, in some respects, common to all steam engines, 

 were not specified, we are indebted to the patentee, who, 

 on being asked, communicated them with the greatest 

 readiness, and also the drawings from which the engravings 

 have been made. 



The exterior of the engine may have the appearance of a 

 low pillar, an altar, a vase, or any suitable form that fancy 

 may direct. 



*' In fig. 2, c is the condensing vessel, a the air pump, 

 I the air pump bucket, d the hot water cistern, e the clack. 

 fj", the inclined plane for working the air-pump bucket, is 

 fastened on the shaft, and consequently revolves with it. 

 To the air-pump bucket is attached a hollow tube through 

 which the shaft goes. To this tube is fastened a cross bar, 

 at each end of which is a roller r, resting upon the inclined 

 plane: of course when the plane revolves the bucket rises 

 and falls. The plane is divided into two different angles so 

 as to make it more acute whei^he bucket rises, but nearly 

 an angle of 45° where the bucket descends, as represented 

 in the drawing. 



*' Fig. 4 is a view of the engine complete when at work. 



" Fig. 5, a section of the principal part of the engine 

 upon a larger scale, where the same letters employed in de- 

 scribing the smaller section mark the same parts. The in- 

 jection enters the groove above the blocks, and keeps about 

 three inches of water upon them. The injection then en- 

 ters the condenser, out of the groove as seen at X. Each 

 segment or block K is of sufficient weight to resist the pres- 

 sure against that part of their under surface which is over 

 the semi-circiilar chamber, and will generally be about 

 5-eighths of an inch. The blocks may likewise be lifted 

 exactly in their centre of gravity by means of a lever in the 

 upper part of the groove, and worked by a roller or small 

 inclined plane fastened to the shaft, as represented by the 

 dotted lines iu fig. 5; and as it is not necessary for the 

 blocks to rise more than half an inch or 5-eighths, the motion 

 will be very easy; and whatever descending power the blocks 



have, 



