Patent GB-429411-A (GB)
Title: Improvements in train-carried devices for automatically recording different signal aspects
IPC: B61L3/10
Filed: 1934-06-02
Abstract: 429,411. Recording signals on trains. HASLER AKT.-GES. VORM. TELEGRAPH - ENWERKSTATTE VON G. HASLER, Berne, Switzerland. June 2, 1934, No. 16520. Convention date, June 2, 1933. [Class 105] A train-carried device for recording different signal aspects and the operation of an " alert " push by the driver at the approach to .signals or to level crossings where the driver must give a warning audible signal comprises a plurality of styles and a device which is movable relatively thereto to enable selected styles to be actuated in combination. A slidable and rockable plate 14 actuates styles 1, 2, 3 or 2, 3, 4 denoting an unobserved or observed signal according as the plate is in an upper or lower axial position, depending on whether the driver operated an alert push 32 within the required distance from a signal, and also actuates such styles 5.. 8 as are selected by the signal aspect through the particular polarities applied to two track ramps. Different audible or visual signals are given and the brakes applied according to the particular signal aspect. The signal aspect is transmitted by the electrical conditions of two ramps which selectively allow the armatures of four polarized electromagnets 34 .. 37 to drop and so position fingers 18 .. 21 over the recording styles 5 .. 8 which, after a short interval, are actuated by the rocking plate 14. The plate 14 normally occupies an upper position, Fig. 11, but drops to the lower position shown in Figs. 8, 9 when the driver operates the " alert " push 32 ; after a certain travel the plate 14 is returned to the upper position. Thus when a signal is passed after the driver has operated the " alert " push within the required distance the plate 14 is in the lower position and the recording pins 2, 3, 4 are actuated, the style 4 being actuated by the ridge 14<1> on the plate and the styles 2, 3 by a loose arm 23 engaged by a lug 25 of the plate 14. If the driver is not alert the styles 1, 2, 3 are actuated as the plate 14 is then in the upper position. The operation of the " alert " push 32 actuates the style 1 through a rocking lever 31 and an arm 28 on a rock shaft 27 which carries the arm 26 engaging the loose arms 23, 24 one or other of which thus actuates the style 1. The rocking of the shaft 27 disengages a continuously reciprocating pawl 71 from its ratchet wheel 16 which allows the rod 13 carrying the plate 14 to drop ; the pawl 71 then re-engages the ratchet wheel 16 and after a certain travel of the train the rod 13 and plate 14 are returned to the upper position, the pawl then moving over a mutilated sector of the ratchet wheel. The rocking of the plate 14 is effected by the release of a spring plunger 63 which acts, through a bell-crank lever 69, on the arm 70 of the rod 13. This release is effected, after a certain delay so that the selector fingers 18 .. 21 for the recording styles 5 .. 8 may be in position, by the dropped armature of any one of the polarized electromagnets engaging in a lost-motion slot of a rod 49 or 65 which respectively directly and indirectly remove a stop 511 from below a pawl 54 to allow the pawl to engage a continuously rocking arm 55 whereby the pawl removes a stop 60 from the spring plunger 63. The plunger 63 is reset by the arrangement shown in Fig. 17 in which a continuously rotating cam shaft reciprocates a lever 124 with a nose 124<1> adapted to actuate a pawl 121 which normally is out of the line of action. The pawl 121 is carried by a lever 119 and is of bell-crank shape with the other leg butting on a pin 123 on the bell-crank lever 69. When the plunger 63 rises the lever 69 rocks and the pin 123 therefore allows the pawl 121 to rock into the line of action of the nose 124<1> so that the lever 119 is depressed and forces the plunger 63 down whereupon the stop 60 retains the plunger. When the lever 124 next rises the spring 128 rocks the bell-crank lever 69 back and the pin 123 of the lever 69 then rocks the pawl 121 out of the line of action of the continuously rocking lever 124. The depression of the lever 119 also depresses a rod 118 by which the armatures are returned to lie against the poles of their magnets. Audible or visual or miniature signals may be given by the released armatures operating spring contacts which are retained in action for a desired time by detents 96 which are retracted when a ratchet wheel 74, which was released on receipt of the track signal, is restored to its normal position by a continuously reciprocating pawl 72. A lug 107 on the ratchet wheel 74 operates a rod 106 acting on a re-set flap 104 which has adjustable screws 103 to act on the detents 96. In order that at a danger signal the signal on the train shall not be automatically cancelled, the particular adjusting screw 103 is retracted so that the particular detent 96 is not actuated. A braking is given by a neutralizing current flowing to a polarized brake control magnet 135 over the contact which is maintained closed as above described. The train danger signal and the braking can only be cancelled by a push 111 and an underframe push 139 but do not arise if the driver operated the alert push 32 within the prescribed distance since a contact 134 would then be open in the line to the magnet 135. At the approach to a level crossing the driver gives an audible warning by means of a push 140 closing a contact 143 ; the push 140 also operates the recording apparatus by acting on a lever 142 which independently actuates the lever 31 and rock-shaft 28, 27. The polarized electromagnets 34 .. 37 comprise four cores arranged on each of two pole shoes 38, 39 which are polarized by two horseshoe magnets 40. For travel in the reverse direction a switch is operated through a friction device on the axle-driven control shaft to change the connections over to the other pair of ramp-contacting shoes.