„Mr. DEARBORN'S T ump-Engine. 52 1 
nd 
gU (IOTI A aT ut A tenu etos 
* 
D 
Rim "n, a ol piece, with a highs in $t loses: end, to see 
"the end of thé tube, atid réfts on: the/fhoülder a P; on thé dower 
end of this head à leather is nailed, having a hole in its centre 
^fimilár to the hole in «he wood; another leather of the fame 
form is put on the top of the tube, and à cirele of thin plate- 
“brafs between them ; the two leathers and the bras being 
preffed between’ the lower end of .the head and the fheulder of 
‘the tube ; their edges are reprefented by 0. KN and LM 
are the edges of two- pieces of plank which are as wide as the 
"head, and ‘hailed faft to it, each of them having a tenhon going 
through a mortice in the end of the piece O P ; each tener has 
a hole for a forelock at gg. OP isa piece of plank as wide 
as the fides, having a hole in its centre threugh which the tube 
paffes, and a mortice on each end for the teanons to pafs through. 
ANM isacap. vrare two pieces nailed on the fide of the 
ube, with a truck in the lower end of each, to lelen the fric- 
‘tion of the head in its horizontal revolution. g g are forclocks 
to wedge the head down; and prevent the water from finding a 
paflage out at the joint: op. 3 Riis a wooden conductor; the 
end Q being folid, the end Rebored with a {mall auger, s is a 
‘bolt going through the conductor and head, fecured on the back 
with a forelock or nut ; this bolt is round near the head and 
fquare in the middle. ¢ x w x is a piece of iron or brafs to pre- 
went the head of the belt from wearing into the wood. $ Sare 
ropes to dire& the conductor. 
Fig. 4. is the head without the as HIE Lid ; & b cdisa 
thick brafs plate perforated to prevent dirt from cloging the con- 
ductor, and nailed with leather under it to the head. The 
fquare hole in the centre is made to the fize of the bolt, and 
prevents it from turning. The conduétor has a hollow cut 
Stí round 
t 
