Patent GB-191027652-A (GB)
Title: Improvements in Street or Station Indicators for Electric Trains, Tram-cars and the like.
Inventor: ALWIES HERMAN
Filed: 1910-11-28
Granted: 1911-06-21
Abstract: 27,652. Alwies, H. Nov. 26, 1909, [Convention date]. Reel and web apparatus. - A station indicator comprises a band B, Fig. 7, wound between rollers 5, 11 and over auxiliary rollers, a shaft 53, rotatable in unison with the band B, connected by means of a spring to a switch 52, and driven by one of the auxiliary rollers 16 through ratchet gearing. The switch 52 controls the driving - motor c. An electromagneticallycontrolled stop 56 cooperates with the armature 52 intermittently with the aid of a cam, and is operated by a controlling - magnet in circuit with a switch, operated by means on the line of route. The motor armature may be provided with a band brake, Fig. 21. A pair of clutches on the winding-rollers enables the direction of travel of the bands to be changed. A projection 41, Fig. 2, strikes an arm 50 and rotates a switch 44, which is controlled by a spring abutting on its squared end and which has conducting-pieces for completing the circuit between a pair of contacts and through the conductors 59, 75, 76, magnets 70 and return wire 77. The magnets 70 attract the armature 71 against the action of springs 73 and liberates the pin 55 on the switch 52 from a holder 56. The tensioned spring of the switch 52 carries it round until the projections 55 engage a rod 78, Fig. 18. The circuit is completed through the motor. A cam 84a on a disk 84 moves a cross-head 88 and sliding rod 78 to the right against the action of a spring 89, releases the pin 55 and allows the switch 52 to be turned by its spring until a lug 52<a> engages a finger 92 on the rod 78. The motor continues to rotate the shaft 53 and so winds up the spring of the switch 52 again. The cam 84 moves the rod 78, and the pin 55 moves on to the shoulder 56, again leaving the motor circuit open. The shaft 53 is stopped by the lugs 93, 52<a> coming together. If the switch 45 accidently stops in its closed position, the machine does not make more than one operation, because a shoulder 95 on the rod 57 engages the pin 55 after one revolution. The machine may be operated by a push-button 97, Fig. 16, or a switch 96. The switches 62, 63, 100 may have the one set of members secured to the roof of the casing and the other set to the door, so that they are operated by the opening and closing of the door. The reversing- means comprises a fixed cam 32, Fig. 8, and a rotating handle 34, which causes a pin 32<1> on the rod 29 to move along the cam, whereby the rods 29, 30, joined by a lever 31, mounted on a pivot 31<a>, move in opposite directions so as to operate a reversing pair of clutches, thus allowing the motor-driven wheel 8 to drive either of the winding-on rollers. The bandbrake on the motor has one end fixed to a pin 116, Fig. 21, and the other to a slide 118, which is connected to an arm 120 by a lever 123, pivoted at a point 124. The arm 120 is fixed to a field-magnet c, which is pivoted at a point 113. When the motor circuit is open, a spring 122 pushes the slide 118 and tensions the band 115, and when the circuit is closed, the magnets 111, 112 are attracted together, and thereby slacken the band 115. The display band is attached to perforated side bands, which engage pins on the rollers 16. The windows of the casing, Fig. 1, may have shutters 20, 21, 22, so that with the band moving through a uniform distance at each operation, a different series of notices is shown according as the shutters are turned upwards or downwards.