Patent GB-190812957-A (GB)
Title: Improvements in or relating to Signalling or Railways.
Inventor: ZOHRAB EDWARD
Filed: 1908-06-17
Granted: 1909-06-17
Abstract: 12,957. Zohrab, E., and Biggs, E. J. June 17. Recording signals miniature signals; contacts, mechanical.-The apparatus described in Specification No. 9711, A.D. 1892, is iniproved, and means are provided for obtaining a record of the signals passed on an intermittently moving band. The signals are given on the engine by means of inclined counterweighted ramps f<6> mounted on levers g on either side of the track and raised from the signal connexions, the ramps being raised when the signal is at danger. The ramps are adapted to engage pivoted levers g<6> on the engine to raise them to one of two different heights. The levers g<6> have contact-rollers g
 and are pivoted to brackets g<7> on the frame, and when raised they contact with lugs h<4>, h<5> on the enlarged end of a rod f<4>, which is thereby depressed and rods i<1> connected thereto raised. The levers g<6> are guided by pins working in slots g<7 x> <x> on a fixed member, and are reversed by means of pins g<8x>, g<9> on a link h<1>, which is moved over by connexion with a handoperated screw-gear h<3> in the cab. Alternatively the end of the rod f<4> may be forked and the arms of the fork slotted to receive the ends of the levers g<6>, which pass downwards on the padded ends of the slots. The rods i<1>, when raised, raise weighted plungers a which are slidingly mounted in casings a', Fig. 1. A spring-bolt b engages with teeth b<1>, b<2> on the plunger a to hold it in its raised position, in which one of the contact-plates b<3>, b<4> carried by the plunger makes contact between one of the plates b<6>, b<7> and the plate b<5> to complete the circuit of one of the lamps e, e<1> as shown, and to ring a bell e<6> which is placed in the common return. The door of the casing has red and green spectacles f opposite the lamps, so arranged that a red light is shown for danger and a green for safety, the circuit of the danger lamp being closed when the plunger is fully raised. The plunger also carries a plate f<2> which normally shows a blank surface through the window f<1> but which, when raised by the plunger, exposes the indications' line clear' or ' danger' according to the amount of movement. The plunger also carries two projections c, c<1> on which are mounted cam-pieces c<2>, c<3> which are adapted to actuate punches c<4>, c<5> to perforate the paper c<6> which is fed from a roll c<7> mounted in the casing, one punch being operated for safety signal and two for danger. The paper c<6> is fed on the return of the plunger a, which takes place when the driver releases the bolt b from the teeth b<1>, b<2>, by a plate d carried on four pins d<4> mounted on a projection d<2> on the plungers and normally held against the heads of the pins by springs d<3>. Projecting pieces d<5> on the plate serve to engage the the paper when the latter is to be fed forward. On the upward movement of the plunger the plate d forces itself between guides d<6>, d<7> normally held together by springs, but on the return of the plunger the projections d<5> engage the inclined surfaces of the guides d<7> and are forced thereby into engagement with the inner sides of the guides d<6> so as to engage the plate d with the paper and feed it forward. An upward extension of the plunger c may operate a system of levers to open a whistle valve at each actuation, or to apply the brakes. The apparatus may be applied to direct the attention of mail-van clerks to mail standards which are being passed.