LOCOMOTIVE ENGINE. 
445 
m 
which extend in the opposite direction to the lever p". The lever, p", is keyed upon 
the cross shaft q", and the other two, p‘"p", upon another shaft q", both extending 
to the side of the engine, and turning in carriages, like the weigh bars i" i'", and 
having the vertical levers r" r" fixed upon their outer ends. The levers r" r” are 
connected by the link $" attached to both; and one of them, r", extends above the 
joint, and is attached to the end of the long bar t", extending to the back of the engine, 
and connected to a similar lever, u, upon a short shaft, v", which is fixed on the 
frame at the side of the fire-box. On the outer end of this shaft, v", and close to 
the hand railing of the engine, is fixed the long handle w", which moves between 
guide plates attached to the hand rail; the outer guide having a notch in the middle 
to hold the lever w" in a vertical position, and another at each extremity of the passage 
between the guide plates. 
In Plates LXXXIX., XC., and figs. 1, 3, and 4, Plate XCI., the lever w" is shewn 
pushed over into the forward notch, pulling the levers r" r" forward also, by the 
bar t" and link s"; causing the lever p" to be raised by the means of the cross shaft 
q, and to pull up the ends of the eccentric rods e e", by the suspending rods o o", 
making the notches in them take hold of the pins in the bottom levers, Ji h", of the 
weigh-bar. The two forward working eccentrics, E / E", are thus put into gear, 
and made to work the slides of the two cylinders, and cause the engine to be pro 
pelled forwards. The other two lifting levers, p"p", are at the same time lowered 
by the lever r" being pulled forward, letting down the rods f" f" of the reversing 
eccentrics by the suspending rods 6" o', so that their forks clear entirely the pins 
in the levers, n" n"; leaving them free to move with the weigh-bar, and in exactly 
opposite directions to the eccentric rods f"f" below them. 
When the hand lever w" is placed in the centre notch of the guides, or in a 
vertical position, as shown in fig. 2, (Plate XCI.,) the side levers r" r" are brought 
upright, and the lifting levers p"p"p" made horizontal; so that the ends of the 
middle eccentric rods are let down, and the notches in them escape from the pins in 
the bottom levers of the weigh-bars: and the outside eccentric rods, ff, are only 
raised into a similar position, and are still not in contact with the levers of the weigh- 
bars. The slides will therefore cease to be worked, although the eccentric rods 
continue moving, and the engine will not be propelled any more, as the steam con 
tinues pressing upon the same side of the pistons. 
But when the hand lever w" is pulled quite over into the back notch of the 
guides, the positions of the eccentric rods are reversed; the outside lifting levers, 
p p, being raised into the same position that the other lever, p, had before, and 
drawing up the ends of the rods f'f" of the reversing eccentrics F' F", to catch 
the pins in the levers n" n" of the weigh-bar upon one of the inclined planes of