LOGGER, STEAM. This name is to a traction-machine devised by Mr. '1'. Glover. which can be driven by steam over a snow road, and which, it is claimed, will ''draw after it from 30,000 to 40,000 ft. of The machine is mounted on two sleds, midway between which the boiler is located. The boiler is of steel, 5i- ft. in diameter. 7 ft. with 320 2-in. and to a pressure of 150 lbs. The engine is 10 X 12 ft., and of double upright pattern. There are four wheels on the 4 ft. in diameter, 3 tons. Each wheel is 1 ft. wide, and on its face there are 17 teeth, 9 in. apart. The of these teeth is 3 in. ; they are held in place by bolts and if less traction-power is teeth of a shorter can be affixed. The axle of the drivers is of steel, 6 in. in diameter, 7 ft. and half a ton. If desired, two of the wheels may be removed, and the two placed on the axle in any position The is simply a wheel in front, which places the of the forward sled in any desired position by means of a link-belt chain over the wheel, over pulleys attached to either side of the 'frame, and !nude fast to the The drive-chain, between the and the drivers, is made of 1+ in. Ulster iron, and 18 lbs. to the ft. The is 28 ft. and, of course. a machine of that size could not be driven over other than a level road. To overcome this difficulty, the drivers and the are sup . ported by separate frames. the pivot-point of their connection about the middle of the front- sled. By the drive-chain and the the two frames are disconnected, and the horse (the as it were, may be taken from between what, one to be the lung timbers forward from the drivers. The bolts the two frames
slide in slots: in the ends of the thills there are imbedded powerful and to compress these to a proper tension are jack-screws, which are made fast to the frame. It will thus be seen that the act as a cushion, and that the will adapt itself to the unevenness of a road. '1'o further assist in this purpose there is a steam-piston. the box of which may be seen in the over and immediately in front of the wheels. The piston-latx is fastened to the frame of the and when necessary the rear sled. the of the and part of the boiler, can be lifted clean from the by the use of Lhe piston. thereby law two points of contact, the front sled and the drivers, and at the stone time additional upon the latter. Increased traction of the is obtained by the use of exhaust-st eau). The wheels are decked, and around the edges, under the frame. are heavy rubber curtains. which nearly reach to the road surface. The wheels thus work in a steam-box. are heated by steam, and when I hey pass over snow it is damped and compressed, and in COW immediately converted into solid ice. mtwhine about 12 tons, and attains a speed of 5 miles per hour.
Loop, Steam : sec Steam-Loop.
Low 11 ri see 31 ill Grain.
Machine-Gun : see ordnance.
Mazazine Ri th? : see Eire-Arms.
ie Si Pa nil Or : see Machinery.
31a nza ilesv Bronzi.: sits A I toys.
13'uoldwork : see Wood-Machines.
3Ianine Engines: see Engines. Marine.