Climax Geared Steam Locomotives

Geared Steam Locomotive Works

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"A Twenty-Five Ton Geared Logging Locomotive"
Scientific American - October 24, 1896



The geared locomotive is finding increasing favor for work on the heavy grades encountered in mountain logging. The device of coupling on another pair of axles when it is desired to increase the adhesion, which is practicable on trunk railroads, is impossible on the average logging road, on account of the sharp curvature of the line. The length of the rigid wheel base must be kept down to a point which prevents any successful coupling up of many drivers by the ordinary methods.   ***** DO NOT COPY **** Violators will be prosecuted! gearedsteam.com
 

Driving Gear Of Truck For Logging Locomotive.


The 25 ton locomotive shown in the accompanying illustrations is one of a type that is manufactured by the Climax Manufacturing Company, of Corry, Pa, for use in logging camps, coal mines, sugar plantations and under any conditions where heavy grades and rough and uneven track are encountered. The necessary lateral flexibility is obtained by carrying the locomotive upon two end trucks and transmitting the power to the wheels, all of which act as drivers, by means of flexible shafting and bevel gears.    ***** DO NOT COPY **** Violators will be prosecuted! gearedsteam.com

The frame consists of two 8 inch channel irons, and has large corner brackets riveted to the channels and bolted to oak end sills. The channels are also connected by double trussed iron bolsters which distribute the weight to the trucks.
 

Truck of Logging Locomotive For Use On Wood Rails.


The cylinders are bolted to the frame and the power is transmitted from the engine shaft by means of heavy steel bevel gears to a flexible shaft, which runs beneath the frame and over the center of the trucks. The details of the driving mechanism on the trucks are shown in the accompanying illustrations, one of which shows the style with corrugated wheels adapted for use on wooden track and the other for use on ordinary steel rail. At is junction with the trucks the line shaft is provided with a universal joint, and it is carried in cross boxes journaled upon the axles, the alignment being secured by means of sleeve couplings and bronze rings, which hold the gears in mesh and the line shaft in position. The cross boxes are provided with metal liners 14 inches long, adjustable to wear. The two inside pinions, which are cast solid to the horns, are keyed to the line shaft, and thus each wheel of the locomotive is made practically a direct driver. The axles are 4 inches and the line shafts 3 inches in diameter. There are ten coil springs in each truck, one over each axle and the others between the sandboards. A steam brake cylinder is attached to the center of each truck, by which means the use of long brake rods, which cause corner binding on curves is avoided.
 

The latest system of carrying the cross boxes and arranging the gear is that shown in the truck for use on steel rails, where the pinions are arranged on the outside of the axles.    ***** DO NOT COPY **** Violators will be prosecuted! gearedsteam.com

These locomotives are doing good work on logging roads having grades up to 8 feet in 100. In one case a 25 ton engine has pulled four loaded standard gage logging cars, with 3,000 to 5,000 feet of green hemlock logs on each car, up an 8 per cent grade and twelve loaded cars over a 4 per cent grade.    ***** DO NOT COPY **** Violators will be prosecuted! gearedsteam.com

 

A Twenty-Five Ton Geared Logging Locomotive

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This information was transcribed in its entirety from the article entitled "A Twenty-five Ton Geared Logging Locomotive" that appeared on page 316 of the October 24, 1896 issue of Scientific American.

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