ExlubUed at Whidm'. 
521 
link has been adopted, no less than seventeen engineSj most of 
them compound, being so fitted. Among the more noticeable of 
these is the arrangement adopted by Messrs. Clayton & Slndtle- 
worth (Art. 4978) for getting over a certain amount of hunting 
on the block which commonly takes place. In the top of the 
central weight of the governor is a glass-lined cylinder about 3 
inches diameter and 4 inches deep. The spindle of the governor 
passes through this, and is fitted with a piston packed with a 
single ring, and a small air hole is provided to allow of the 
escape of some air. As the counterweight works up and down, 
the air between the piston and the bottom of the cylinder is 
compressed or exhausted, and so checks the rapidity of move- 
ment, while the small hole and the leakage along the governor 
spindle and the piston allow the air to assume its normal state 
when the counterweight is at rest, at any position due to the 
speed. 
Messrs. Ilornshy (Art. 5063) attain the same end by causing 
the governor to act by means of a short lever on a rocking shaft, 
on to one end of which is keyed an eccentric about 7 inches dia- 
meter ; the eccentric strap is in one piece cut through at one 
side, the ends being held together by lugs and a bolt, so that 
the degree of tightness can be adjusted. The eccentric strap 
actuates the sliding block connected with the expansion slide, 
and the friction of the strap on the large sheave serves to damp 
the energy of the oscillations. 
Messrs. Ransomes, Sims & Jefferies showed a Sixteen Horse- 
power Horizontal Engine with Special Expansion Gear. (Art. 
4997.) — This engine has a cylinder 13 inches diameter by 2 
feet stroke, which actuates a crank shaft in the usual manner. 
The valve gear is, however, peculiar, and deserves attention. 
The steam admission valves, which are of the double beat kind, 
are at each end of the top of the cylinder, ari'anged so as to 
leave as little clearance space as possible. The exhaust-valves, 
which are of the cylindi'ical slide variety, are at the liottom, 
with their axes at right angles to the cylinder, and worked 
by a special eccentric on the crank shaft in the usual manner. 
The steam-valves are lifted by means of levers having fulcra 
nearer to each other than the two valves. The outer ends of 
the two levers grip the valve-spindles through cross heads, the 
position of which on the spindles can be adjusted by means 
of nuts fitting on to screws cut on tlie spindles, and the valves 
are further contracted by spiral springs coiled on the spindlea 
and abutting against a cross bar, which is secured to a cen- 
tral bracket and extends over both valves. The tail ends of 
the levers are turned to eacli other, and almost abut against 
