Patent GB-190429049-A (GB)
Title: Improvements in and relating to Power Transmitting Mechanism and Control Apparatus for Automobiles or Motor Road Vehicles
Inventor: BROOKES ALFRED GEORGE
Filed: 1904-12-30
Granted: 1905-12-30
Abstract: 29,049. Brookes, A. G., [Maxwell-Briscoe Motor Co.]. Dec. 30. Motor road vehicles. - Relates to the general arrangement and construction of the working parts on motor road vehicles, and includes means for operating, interlocking, and lubricating special change speed and clutch mechanism, and a universal joint carrying lubricant for supplying the working parts. Figs. 1 and 2 show an explosion engine 4 driving the shaft 10 through a friction clutch 19 and changespeed gear contained within the case 11. The engine cylinders 5 have jackets 6 connected by tubes 7, 9 to a radiator 8 of the type described in Specification No. 29,049A, A.D. 1904, and an interchangeable frame of the type described in the abovementioned Specification is used to carry the valveactuating mechanism. The two clutch members 19, 20 are normally held in engagement by a spring 21, but may be forced apart by either of two cams 22, 23 mounted respectively upon a shaft 24, journalled in bearings on the gear case 11, and upon a sleeve 26 surrounding one portion of the shaft 24. A foot-lever 30 is linked to the sleeve 26, and, when depressed against the action of the spring 36, causes the cam 23 to engage a plate 27 of a yoke encircling the shaft 24 and having depending arms provided with pins 29 which engage the sliding clutch member 20. A projection 33 of the lever 30 engages one of a series of notches 35 on a quadrant mounted on the vertical change-gear operating- shaft 12, when the gearing is correctly positioned, and thus prevents the gear from being operated while the clutch is in operation, and also prevents re-engagement of the clutch until the changespeed operation is complete. The shaft 12 is connected by links 14, 15, 16 to a shaft 18 having an operating-handle 17. A second handle 41 operates a sleeve 40 connected by links to the shaft 24, and by other links 42, 43 to a brake band 45 carried by a projection 46 of the gear case. The first movement of the handle 41 operates the cam 22 to disconnect the clutch independently of the changespeed gear and foot-pedal 30, and a further movement in the same direction applies the brake. Figs. 11 and 17 show means for operating and controlling the members of epicyclic change-speed gear, consisting of an arm 77 which slides in the gear case 79 and carries a roller 88 and cam-surface 100 so that, when moved to the right, it will successively depress the arms 89, 101 of dogs or grips, one of which is shown in Fig. 17, pivoted on the shaft 91 and carrying lugs 93 adapted to force the brake band 96 into engagement with the outer surface of one of the internally-toothed wheels of the gearing. The fixed end of the brake band may be adjusted from outside the casing by the screw 98. The gear case 79 is preferably formed integrally with the crank chamber 85, and is provided with a handhole covered by a removable plate 86. When the slider is moved to the left, a second cam 102 engages a pivoted lever 103 and forces a sliding cone 107 on the driven shaft 81 into engagement with dogs 108, Figs. 11 and 18, which act on the plate clutch shown in Fig. 18. The latter clutch consists of alternate plates 109 feathered on a bush 113, which is screwed on the shaft 81 and has between them plates 110 loosely mounted on the bush 113 and secured to the inner surface of the projecting rim 118 of the gear wheel 84 by means of the yoke pieces 117. The dogs 108 act on the disc 125 of spring steel, fixed in a recess on the outer clutch plate, and force the clutch plates together, thereby rigidly connecting the driving and driven shafts 80, 81 for high speed. The edges of the clutch plates may be bent up slightly in places, and additional springs 121 engaging a shoulder on the bush 113 may be used to separate the clutch plates when the dogs are released by the plate 102, which engages the arm 172, when the slider is again moved to the right. The change-speed gear consists of the internallytoothed wheel 84 loosely mounted on the shaft 81 and adapted to be engaged by planet pinions 129 mounted on pegs 130 which connect the fixed hub 131 of the shaft 81 and the web 132 of the drum 83. A bolt 134 is used further to connect these parts. Internal teeth on the drum 83 are engaged by planetary gears 136 carried by pegs 137 mounted on the loose drum 82. For low forward and reverse speeds, the dogs 108 are released and the pulleys 84, 82 respectively prevented from rotating by the brake previously described. For high speed, the pinion 141 on the driving-shaft drives the pulley 84 through the planetary gears 129, the latter pulley being clutched to the driven shaft 81. An oil chamber 142, closed by a plug 143, is provided in the shaft 81, and communicates with the chamber 151 in the drum 84 by a series of passages 144, 146, 150. Other passages are shown leading from the chamber 151 to the various members of the gearing. Fig. 8 shows a universal joint having its forked arms 63 connected to the usual cross by threaded pins 65 having washers 76 of felt or other suitable material in grooves at the base of their heads. A conveniently-shaped shell 67 surrounds the cross and has chambers 68 for holding lubricant introduced through a removable screwed cap 70. Holes formed in the material of the hollow cross admit the oil from the chambers 68 to the pins 65.