It will be remarked that the crank, A?, and the bearings, _g?_,
are very long. The end the inventor had in view in constructing them
thus was to diminish friction.
To the shaft, A, are keyed the coupling disks, Q, which are cast solid
at a portion of their circumference situated at 180 deg. with respect to
the parts, A squared, of the cranked shaft, the object of this being to
balance the latter as well as a portion of the connecting rod, D.
The shaft, A, also receives the eccentric, E, of the slide valve, the
rod, _e_, of which is jointed to the slide valve rod through the
intermedium of a cross-head, _e?_, analogous to that of the pistons,
and which, like the latter, runs on guides held by the support, b.
The two pistons, _p_ and P, are mounted very simply on the rod, T, as
shown in Fig. 1, and slide in cylinders, _c_ and C, whose diameters
are respectively equal to 270 and 470 millimeters.
The slide valve box, F, is bolted to the cap-piece, B?, as seen in
Fig. 4. As for the slide valve, _t_, its arrangement may be
distinguished in section in Fig. 2. Its eccentric is keyed at 170 deg. so
as to admit steam into the small cylinder during the entire travel,
which latter is 470 mm.
To permit of the expansion beginning in the small cylinder, Mr. Farcot
has added a sliding plate, _t?_, which abuts at every stroke against
the stops, _s_. These latter are affixed to the rod, S, whose lower
extremity is threaded, and which may be moved vertically, as slightly
as may be desired, through the medium of the pinions, S?, when the
hand-wheel, V, is revolved.
Pages:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25