Patent GB-190502119-A (GB)
Title: Improvements in Signal Indicating Devices for Locomotives.
Inventor: ZEPPELIN FERDINAND GRAF VON
Filed: 1905-02-02
Granted: 1905-07-20
Abstract: 2119. Zeppelin, Ferdinand, Graf von. Feb. 2. Indicators, station, stopping- place &c.-A disk on an indicator placed on the locomotive is geared from the locomotive wheels to rotate once during a complete journey between terminal stations, and to sound alarms and give visible signals on approaching a signal. Fig. 5 shows a_plan view, and Fig. 6 a view in elevation of details. The disk 4 is provided with projections 5 on each face, one set of projections for each complete journey, and is rotated by its shaft 3 through spur-gearing from a shaft 2 rotated by worm or other gearing from the locomotive wheels. Just before reaching each signal, a projection 5 on the inner face of the disk 4 engages with an arm 6 on a shaft 7, which it depresses, rotating the shaft 7. and lowering an arm 8, which supports a lever 10 pivoted on a shaft 13 against a spring 11. The spring 11 then lowers the lever 10, which presses the arm 8 further down, and continues the rotation of the shaft 7, thereby sounding an ordinary bell alarm by means of a toothed sector 12 attached to the shaft 7. The mechanism is restored to its original position for further operation by the next projection 5 by a spring clutch mechanism 17, set in operation by a bevelled projection 14 on the lever 10, which moves over a centrally-pivoted forked lever 15, to cause engagement of two clutch members 17, 18, the latter of which is fixed on the continuously-rotating shaft 2. The portion 17 is thus rotated, and, by means of an attached arm 22 with a roller 23, depresses one arm of a lever 21 pivoted on the shaft 13, thus raising the other arm of this lever 21, which by means of a roller 20 raises an arm 19 fixed on the shaft 7, which is thus rotated back into its original position. This raises the lever 10 again, and lowers the arm of the lever 10 carrying the bevelled projection 14, so that a spring is allowed to separate the clutch members 17, 18 once more. This disengagement is, however, prevented until the clutch has made a complete revolution-so as to restore the shaft 7 fully to its original position, by a pin 27 fixed to the framework engaging in a notch 26 in an annular ring attached to the clutch portion 17. This pin 27 rides outside the annular ring, maintaining the clutch engagement until a complete rotation has been made, to allow the notch 26 to come round opposite the pin 27 again. A ratchet mechanism on the shaft 2 drives the wheel 28 of the gearing in one direction only so that the disk 4 may only rotate in one direction. A bevel changewheel gear, Fig. 5, is employed to drive the shaft 2 and allows the apparatus to be disengaged in the middle position, or allows the shaft 2 to be driven in either direction to provide for the engine running tender foremost. To call the attention of the driver to temporary signals used in case of repairs to the track or the like, auxiliary coacting levers 30, 31 on the shafts 3, 7 are provided, and may be placed in relative operative position by hand operated slides 32, 33. The angular position of the lever 30 is determined at the beginning of a journey by the position of a pointer 34 on a fixed circular distance scale 35, and another pointer may travel over a concentric scale marked with indications of the ordinary signals to indicate visibly to the driver the precise signal for which the alarm has just sounded.