Ntv) Patentt and Mechanical Inventions. [Marcn I) 



172 



pass. A man placed, as in the sketch, 

 applies his whole weight on one leg to 

 each of these levers in succession ; the 

 effect is that the upright bars become 

 moveable feet, which push the carriage 

 forward at each step in a quantity regu- 

 lated by the length of the channels in 

 which they move, when by the advance 

 of the carriage one of them, as a in the 

 figure, has reached its utmost inclina- 

 tion, the other, as b, which has been 

 meanwhile released of the operator's 

 weight, is by the re-action of the spiral 

 spring brought to its original position, 



and is ready to act in its turo ; the ac- 

 tion of the whole is of course rendered 

 continuous and equable by the.operator's 

 rapid change of position ; two of these 

 levers ai"e arranged on each side so as 

 to afford sufficient power. The ma- 

 chine is directed by a single wheel g-, 

 which has a horizontal motion, and is 

 worked by the handle h, within the 

 reach of the operator. The machine 

 has perfoimed six miles per hour with 

 a considerable load, going up hill with- 

 out difficulty, and passing rapidly 

 down steep declivities in perfect safety. 



DB. cartwright's pedo-motivb machine. 



TbCAPTAiN Charles Phillips, R. N. 

 for certain Improvements on Capstans. 

 The patentee's object in this in- 

 vention is to obviate the difficulties 

 which attend the usual mode of weigh- 

 ing anchoi-s; from deficiency of power 

 in the capstan, and the necessity of em - 



Eloying much manual labour ; and in 

 is choice of the means of effecting his 

 purpose, appears with sound judgment 

 to have used such combinution as from 

 their simplicity are the best suited to 

 the nature of the marine service, and 

 the most effoctively serviceable to the 

 probable cases of emergency. 



In the ordinary capstan, the drum 

 head is fixed upon the square of a spin- 

 dle, and both revolve horizontally by 

 manual power acting on the capstan 

 bars, fitting into the mortices in the 

 dram head as usual. lu ordinary the 



drum head is firmly attached to the 

 barrel, and revolves with it ; but in 

 the improved capstan, their connection 

 is formed by the descent of bolts, which 

 falls info sockets in the barrels or 

 whelps of the capstan, and fastens them 

 together ; or when withdrawn from the 

 sockets, the drum head with the spindle 

 moves iDund, leaving the capstan sta- 

 tionary. 



At the lower part of the spindle the 

 patentee affixes a spur-wheel, which 

 revolves with the spindle and drum- 

 head, and gives motion to three planet 

 wheels, moving round and within a rim 

 wheel. The pivots of the axes of these 

 wheels are supported in two plates, 

 forming a frame or carriage to hold 

 them, and which turns loosely upon the 

 spindle, and as the rim-wheel is sta- 

 tionary, the spur or sun-wheel drives 

 round 



