MACHINE FOR CLEARING ROAD'S, 29 



VIII. 



Defcription of a Machine for Clearing great Roads from Mud. 

 Communicated to the Society of Arts, hy the Inventor Dr. John 

 WiNTERBOTTOM, of Ncivbury, Berks*. 



In a defcription of this machine, I ftiall briefly notice the ^achlnft for 

 five principal parts of which it is compofod ; the frame, the from mud» 

 fcraper, the chain, the fledge, and the pole ; becaufe a very 

 accurate mode! accompanies this paper, made upon the ufual 

 fcale of one inch to a foot. 



The frame (fee Plate I. Fig, 1.) confifts of two pieces of 

 timber AA, which at one extremity are formed into a pair of 

 ihafts BB, and at the other are ftrongly united by three tranf- 

 verfe pieces C D E. 



The fcraper F is placed under this frame-work, in an 

 oblique diredion, at an angle of 30°, between two of the tranf- 

 verfe pieces CD, and confeqaently forms an angle of 150* 

 with the line of draught. By this pofition of the fcraper, 

 the machine, when ufed, adually clears itfelf from the mud 

 as faft as it is colie6led, and removes it into a heap on one 

 fide, after the manner of a plough. 



The chain G is connected with a piece of iron-work H, 

 which projeds from the lower end of the fcraper; for here 

 additional power is required, as the whole body of the mud, 

 which has been colleded, muft pafs off by this extremity. 

 Some advantage has alfo been gained by making this end of 

 the fcraper (horter than the other. 



Thejledge II is conftrufled upon the upper part of the 

 frame, that by inverting the machine it can be tranfported 

 without injury to the fcraper, over the moft rough and ftony 

 roads, or pavements, to thofe places where its ufe is par- 

 ticularly required. 



The pole K, which Is moveable, ferves the purpofe of a 

 rudder, that when the machine happens to be forced by any 

 great weight of mud, or folid body of earth, &c. from its 

 proper diredion, it can be eafily reftored to its former pofi- 

 tion : and it may alfo be obferved, that the moderate preffure 



* To whom the filver medal was voted. There is a model in 

 the Society's Repofitory, 



4 of 



