Patent GB-474328-A (GB)
Title: Improvements in locomotives of the type particularly adapted for underground haulage purposes
IPC: B60L13/00
Filed: 1936-12-23
Abstract: 474,328. Locomotives. WATT, T. Dec. 23, 1936, No. 35259. Convention date, Jan. 8. [Classes 79 (i), 79 (ii), and 79 (iii)] [Also in Groups XI and XXX] A frame for a locomotive particularly adapted for underground haulage is of box form and is divided horizontally into upper and lower parts to provide for assembling the driving axles and associated parts from above, the said axles being cushioned between upper and lower pads of resilient material. The locomotive may be propelled electrically or by compressed air, and means may be provided for raising and lowering an electric battery or other power source for replacement. In the construction shown the frame comprises a lower box-form part 3 of welded construction, and an upper part consisting of two channel members 1, 2 and bolted at 5 to the lower part. The side walls of the lower part have slotted openings 6 to receive the housings 9 of bearings for the wheel axles 7, 8. Rubber pads 11, 10 are provided above and below the bearing housings 9, the load being taken by members 12 bolted at 13 to the channels 1, 2 and resting on the pads 11. The lower frame part 3 forms an oil sump and is sealed by the pads 10 and by sealing washers 90 curved to correspond with the spherical races of the self-aligning bearings 95. Reinforcing beams 35, 36 are welded to the lower frame part 3. An electric motor or motors 20 drives a countershaft 15 through chain gearing 23, 24, and the axles 7, 8 are driven from the shaft 15 through chain gearing 25, 27 and 26, 28. A second motor may be provided at 21 also driving the countershaft 15 through chain gearing. A driver's cab or platform comprises a U-shaped frame or draw-bar having arms 61, 62 which slide in brackets 63, 64 on the main frame, so that the cab can be removed or secured in either of two positions, the working position shown or one in which the arms are pushed right into the brackets. The U-frame is secured in either position by pins passing through holes 65 in the brackets and the arms 61, 62. The cab is collapsable, being provided with a floor 67 hinged at 68 and secured by bolts 74, and with side pieces 77 hinged to the floor and secured in place by hooked ends 78 engaging over the arms 61, 62. The battery 22 or like power source is supported by cross members 100 and rests on rubber or like pads 101. A jack is provided on the locomotive for raising and lowering the battery and comprises a cylindrical member 45 slidable within a fixed casing 47 and engaging a screw 51 rotated from the driver's cab by a handle 41, shaft 42, chain gear 43, 44 and bevel gearing 54, 53. The chain and bevel wheels 44, 54 and their shaft 55 are carried by a removable bearing 56 which can be fixed on the opposite side of the jack when a cover plate 59 is removed. The opening in the top of the member 45 is closed by a dust cover 58. When the battery has been raised it is swivelled across the locomotive and lowered on to bearers at each side of the track. The battery box may be mounted on rubber rollers and collapsable legs may be provided to support the battery astride the track instead of the bearers. A head lamp 104 is fixed below the top of the locomotive and its light is directed in either direction along the track by means of a curved reflector casing 105 and a swivelling mirror 107. The risk of damage to the mirror may be lessened by mounting it on pivoted arms 108 held in position by friction means.