33S 
NEW GARRISON CARRIAGES. 
12’5-in. M.L.B. of 38 tons, Carriage and Casemate Platform. 
I .—The Carriage . 
This carriage is of (C double-plate ” construction, upon Capt. Scott 5 s 
principle—namely, with low brackets, the frames of which are of cast- 
iron, and a well between them. 
The brackets are supported by three transoms, and each is further 
strengthened by a knee-stay. The transoms and stays extend below 
the brackets, to form the well of the carriage, which is completed by 
a bottom plate riveted beneath. The latter does not extend to the 
rear transom, in order to give access there to the interior of the carriage 
for placing skidding when the gun is being mounted or dismounted. 
The eccentric axles of the rear rollers are worked, as in naval heavy 
carriages, by a hydraulic jack,* with an alternative arrangement of 
lever and tackle. The jack is placed upon the left of the carriage, 
inside the bracket, attached to a bearing upon the latter, its ram being 
keyed to a crank upon the shaft; the lever upon the same side of the 
carriage, outside the bracket, keyed upon the end of the shaft. The 
extremity of the lever is formed into a treble block, a corresponding 
quadruple one being attached to the side of the carriage. To bring 
the near rollers into action the lever is pulled down, and when they are 
not in use it is secured by a pawl. 
The elevating gear is similar to that of the “ Devastation 55 turret 
carriage, and consists of an arc, secured to the gun, top and bottom, on 
the right side, worked by a metal hand-wheel outside the bracket of 
the carriage, through a train of wheels and pinions. Attached to a 
bearing upon the bracket is a clamping arrangement, consisting of a 
bow or cramp, two friction-pieces, and an adjusting screw with lever 
handle. Tightening the screw presses the friction-pieces against the 
arc, and clamps it. The gain of power in elevating is 
To attach the carriage to the endless chains of the running-back (or 
up) gear of the platform, it is fitted with nipping gear (Scott’s). 
This consists of a sprocket plate (or plate with projecting teeth) on 
each side (one for each chain), connected by a short cross shaft inside 
the well of the carriage, which plates are lowered, when it is desired 
that their teeth may catch in the chains, by means of a link and 
eccentric, worked by a lever outside the carriage on the left. The 
chains pass through brackets beneath the carriage which hold them up 
to the sprocket plates when the latter are forced down. A counter¬ 
weight is attached to their cross shaft, to keep the sprocket plates up 
and clear of the chains when not in use. 
The carriage is fitted with the usual holding-down clips, buffer 
bracket, &c. 
* This jack is “Tangye’s double-action to 10 tons.” The action of the pump is precisely as 
described for that of tbe lift in the 10-in. muzzle-pivoting carriage. 
elevating 
58'3':1. 
