Patent GB-292225-A (GB)
Title: Improvements in or relating to automatic recording apparatus
IPC: G07C1/08
Filed: 1927-03-14
Abstract: 292,225. Automatic Telephone Manufacturing Co., Ltd., and Smith, S. R. March 14, 1927. Recording particular operations.-In apparatus for record. ing the number and times of working of machines each of the marking or perforating elements is operated by an electromagnet energized intermittently by impulses sent from the machinery, and means are provided for effecting time markings by the energization of an electromagnet co-operating with a wheel adapted to be driven under clock control and having time marking configurations. The time marking wheel is stepped by an electromagnet which also serves to advance the record-strip. The apparatus, Figs. 1, 2, and 4, comprises a casing in which is pivotally mounted a non-magnetic base plate or table 14 over which the record-strip passes from a supply roll on a spindle 78 between feeding rollers 11, 12 to an outlet aperture in the casing. The table 14 is supported in its raised position by a slidable stay 16 which can be slid outwardly to engage the back of the casing, Fig. 4. The marking elements 10 are perforating needles on adjustable spindles 22 and are carried by flexible strips 17 secured at one end to a supporting bridge 18. Each strip 17 carries a block armature 19 for an electromagnet 20 which may be intermittently energized, as by impulse sending mechanism described in Specification 292,224, this mechanism being driven from the machinery whose record is required. The electromagnet 20 consists of two coils supported by metallic screws and a yoke piece 64 from the underside of the table. Movement of the strips is limited by bridges 24, 25, the bridge 24 being adjustable through its spring supporting strips 27 and screws 28. The adjustment of the strips is such that should a magnet remain energized the needle rests lightly on the record surface and so avoid rupture thereof. The time marking device and mechanism for moving the record-strip comprises' an electromagnet 30 energized at suitable intervals from a master clock and having an armature carrying a pawl 35 for actuating a ratchet wheel. The shaft of the ratchet wheel is provided with two worms 37, 38, the worm 37 driving a worm wheel 43 which by means of a friction clutch 71 actuates' a type wheel 72, and the worm 38, through a worm wheel 39 actuating the feed roller 11. Small adjustments of the roller 11 may be made by a thumb screw 29. The ratchet wheel shaft also carries a projection 45 which in each revolution closes the contacts 46, 47 to energize an electromagnet associated with a marking pad 44 to effect the time record. The type wheel mav be provided with symbols to mark minute intervals, additional symbols being provided for the quarter-hours, half-hours, and hours as shown. This wheel may be coupled with another type wheel adapted to distinguish the hours. A diagram of the circuit connections is shown in Fig. 5 wherein the parts 110 - - represent the impulse sending devices at the machines, the parts 120, 121 represent the master clock contact and the magnet energized thereby to advance the record-strip and type wheel, the parts 122, 123 represent the contact closed by the ratchet wheel shaft and the magnet energized thereby to effect the time record, and the parts 124 - - represent the magnets of the individual perforating devices. A condenser 55 is inserted in the circuit to prevent excessive sparking. In a modification the marker carrying arms are supported in notches in the bridge 18 and held by springs attached to pins on the bridge and arms, the lower stop for the arms having tapered grooves to ensure that the perforations are made in the correct position. Specification 292,640 is referred to.