Recount of a Patent Pump. 1 9 J 



without injuring the barrel or the pifton leathers ; fo that, 

 befides the avoiding of unrfeceflary tear and wear, the power 

 of the pump is preferved, and not apt to be ■ diminished or de- 

 ftroyed in moments of danger, as is often the cafe with the 

 common and chain pumps : that the valves are not confined 

 to any particular dimenfions, but are made capable of dif- 

 charging every thing that can rife in the fuclion- piece, without 

 danger of being choked: that if there mould happen upon any 

 occafion to be an obftru&ion in the valves, they are both 

 within the reach of a performs hand, and may be cleared at 

 once, without the disjunction of any part of the pump. Be- 

 fides, it occupies very little fpace in the hold, and thus faves 

 room for ftowage. 



But this is not all : the pump under consideration may be 

 hijlantancoujly converted into an engine for extingui/hingfre 9 

 as it commands at will all the advantages which refult from 

 the principles on which forcing pumps are conftru&ed. This 

 is obtained by Amply fcrewing an air veiTel H on the top of 

 the fpout G, while the mouth of the fpout is furniihed with 

 a ftopple, fig. 3. made for receiving fuch pipes and hofe as 

 are common to fire engines. This ftopple is elliptical and 

 tapered, and, being introduced tranfverfely, upon being pulled 

 back becomes immediately tight. 



Thefe parts being provided, all that is necefTary to make 

 the pump aci as a tire engine, after having been ufed as a 

 fucking pump, is to plug up the fpout with the Hopple. 

 When not wanted to acl as a forcing pump or fire engine, 

 thefe parts are not necefTary. 



The advantage to a fhip of having a pump, which, as oc- 

 eafion requires, may either be ufed Tor raifing water or extin- 

 guishing fire *, is too obxious to require comment. It may 

 however be obferved, that in its latter capacity it may alio be 

 ufeful on (hip-board for many common purpofes, fuch as 

 warning the decks and fides, or for wetting the fails in light 

 winds. For thofe purpofes clean water may be applied in 

 various ways, but perhaps the moil fimple is by the ftop- 

 cocks, ufed in many fhips for fweetening them. 



But this pump is not confined to nautical ufes alone; its 

 adaptation extends to the raifing of water in all fiUiation;, 

 and with peculiar advantage where it happens to be mixed 

 with fand, or fub fiances which deftroy other pumps; as, for 

 inftance, in alum works, foap works, mines, quarries, the 

 clearing of foundations : and in its double capacity it will be 

 very convenient in gardens, bleaching grounds, on Weft 

 India etlates, (combining a fiili-houte pump and a fire 

 * lire engines, when w >»ted, aic often out of repair. 



N % engine,) 



