Patent GB-190629398-A (GB)
Title: Improvements in or relating to Apparatus for Recording the Time of Signals on Railways and the like
Inventor: HEWITT THOMAS PETER
Filed: 1906-12-24
Granted: 1908-03-24
Abstract: 29,398. Hewitt, T. P. Dec. 24. Typewriters.-A typewriting-attachment is provided in railway &c. signal time-recorders for printing remarks on the record tape. The attachment is shown in duplex form in Figs. 1 and 3 as applied to a duplex arrangement of the signalrecorder described in Specification No. 17,546, A.D. 1906, [Abridgment Class Printing other than letterpress &c.], and comprises a keyboard typewheel mechanism with duplicate type-wheels 2 arranged beside the time-printing wheels 91 and traversed by escapement mechanism for letterspacing. Hammers 59, 60, operated by universalbar mechanism and electro-magnets 57, 58 singly as determined by a switch controlled by a hand-lever 52 and keys 102, actuate the tape-feed trips for any line-spacing additional to the normal feed at each signal. The tapes are led from reels 96 over guides 97, 98 to the receiving-spools 100, so-that there is a vertical run for exposing the printing. The inking- ribbons are led from spools 108 connected by chain gearing 114 to the winding-arbors 116 of the tape motors, over guides 109, 110 to spools 111 geared to spring drums 112. The type-wheels 2 are mounted on shafts 3 geared to a common shaft 5, which is connected by bevel-gearing to two shafts 8 provided with quadrant disks 9 actuated by pivoted arms 12, depressed by the character keys 16 and returned against stops 28 by springs 27. A returning-spring 24 for the shafts 8 is connected to arms 23 loose on the shaft and engaged by stops on arms 20 fast on the shafts. Each key 16 is provided with a projection for depressing one of the arms 12, and with an incline 18 for advancing a sliding stop 15 under that arm. The keys 16 and a space-key 90 engage a universal cradle 30 on a rock-shaft 29, provided with an arm 31 for closing the circoit of the electro-magnets 57, 58, and with a second arm controlling escapement mechanism. The arm 31 engages with a rod 33, Figs. 3 and 6, spring- depressed in a tube 34, and provided with a pin for releasing a detent arm 40 from a disk 42 on a spring-elevated arm 44, which carries a contact 49 and is connected by a toothed sector 45 to a train of gearing 47 including a fan, so that there is delay in the operation of a hammer. The arm 44 is returned by a second pin on the rod 33. The escapement mechanism comprises a rack b7, Fig. 6, connected by arms. 66 with. the type-wheels 2 and propelled by a spring drum, and an escapement shaft geared to the rack 67 and provided with a free-wbeel ratchet 79 controlled by pallets 78 on a pawl-lever 76 actuated by a ratchet-wheel 75, which is operated by a free-wheel device and crank connected with a push-rod 69 engaged by the second arm on the rock-shaft 29. The rack 67 is returned by a hand-lever 89. Alinement of the type-wheels 2 is effected by means of serrated disks 64 on the shafts 3, and V-shaped projections 61 on rods sliding in sleeves 63 on the hammers 59, 60 and pressed downwards by springs. It is preferred to expose time-indicating rollers through slots 107, instead of using hands moving over a face. According to the Provisional Specification, the type-wheel is swung against an impression roller, and may be arranged either behind or beside the time-printing wheels.