. The Street railway journal . ontaining a tension reel provided with an automaticadjustable locking device and a retractor arm of suitable length,receiving the power of the springs E through the medium of thearm F and yoke G. In Fig. 1 there is a maximum of spring powerand a minimum of leverage. In Fig. 2 the order is reversed, theminimum of spring power and maximum of leverage at H, whichin this machine gives 75 per cent more power in the last the retractor springs can be wound up by the ratchets D toagree with the trolley-pole tension, the vicious action of unneces- ward pull of
. The Street railway journal . ontaining a tension reel provided with an automaticadjustable locking device and a retractor arm of suitable length,receiving the power of the springs E through the medium of thearm F and yoke G. In Fig. 1 there is a maximum of spring powerand a minimum of leverage. In Fig. 2 the order is reversed, theminimum of spring power and maximum of leverage at H, whichin this machine gives 75 per cent more power in the last the retractor springs can be wound up by the ratchets D toagree with the trolley-pole tension, the vicious action of unneces- ward pull of an inch or two is given on the trolley, the lockingdevice is thrown out of gear and the trolley can be manipulatedwith the utmost freedom. After the trolley is replaced on thewire the arm is raised to an upright position, and the lockingdevice set in action, the small lever being locked so that itcannot be tampered with. Fig. 3 illustrates the locking device,which permits the conductor to manipulate the trolley with FIG. I.—RETRACTOR READY FOR SERVICE power on the start is obviated in case the harp should bepressed against the wire. The spring power at E is divided, and should one of the springsbreak it still leaves energy enough in the remaining one to getthe trolley out of danger. It is claimed that the breaking of bothsprings would merely change the machine into a trolley catcher,and that a broken spring can be replaced in three minutes with-out removing the device from the car. The action may be breifly described as follows: When the caris running and the trolley is on the wire the tension-reel accom-modates the variations in heights of line, but when the trolleyjumps from the wire, a sudden upward movement of 3 ins. or 4ins. locks the reel and raises the latch C. The arm then swingsdown like a movement of the human arm, and carries the tiolleywith it, the reel remaining securely locked while in that when a small lever, which is raised to an
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
