Patent GB-278121-A (GB)
Abstract: 278,121. Harris, H. K. July 5, 1926. Monogrammic signs.-Comprises apparatus provided with selectively operated composing or setting means having projecting tripping devices, sign elements also associated directly or indirectly with corresponding projecting tripping devices, and means for imparting relative movement between the two sets of tripping devices to effect a setting of the elements. General arrangement. The girder 25 supports brackets 26 which form bearings for the spindles of chain wheels 27 arranged in a horizontal plane, the chains running in channel members 29 supported from the girder. The wheels 27 are'driven through worm and chain gear from an electric motor 34. Supported by standards 35 is an endless track 37 of T-section vertically above the channel members 29. Unit plates 38 having elements 39 are provided with top and bottom rollers 41, 40 which are so arranged to allow the plates to travel around the curved ends of the track. A stationary composing means 60 shown in chaindotted lines in Fig. 1 is provided. Unit plates. The plates 38 have casings 49 arranged behind apertures in the plate. Each casing supports the pivots 50 of an exhibiting disc 51 one side of which contrasts with the plate 38 and the other side is indistinguishable therefrom. The upper pivot carries a pinion 52 meshing with a quadrant 53 pivoted at 54 to the casing 49. The quadrant is extended rearwardly into a lever arm 55 connected by a bar 57 with a lever 56 at the opposite side of the casing. The bar 57 has five equally spaced holes into any of which a stud 59 may be inserted. When the stud meets a fixed projection, the element is turned to expose the hidden face. The holes 58 are provided so that the stud 59 for each of the elements in each horizontal row of five shall come in a different vertical position. Composing device. This comprises a framework 61 in which jacquard bars 64 are mounted to slide. Their movements are controlled by shaped slots 64<a> in the upper and lower ends. They are retained in the upper position by a common locking bar 66 carried by lever arms 67 and pressed by springs, not shown, behind the shoulder 68. When released the bars 64 are pulled down by springs 70. The bars may be set by hand, keyboard or jacquard drums. As shown, the setting is by a permutation selector device. A number of guided permutation bars 73 are arranged above and transversely to the bars 64 and are drawn to the left by springs 74. They are adapted to be forced to the right by a lever. A number of electromagnets 76 are arranged so that the noses 78 of their armatures control rocking detents 79 adapted to engage the hooked ends of the bars 73. The magnets are energized by impulses according to say the five unit telegraphic code. The released bars 73 are pulled to the left. The bars are formed with notches and according to their relative positions a common groove is formed across them in various positions. On a bar 81 are pivoted levers 82 to which are attached pivoted links 83 pulled to the left by springs 84. Links 85 are pivoted to these links between their pivots and are also pivoted to the jacquard bars. A bail 86 is carried by levers 87 and forces the links 83 to the right against their springs. The links are guided in the slots of a comb formed on the casing and are provided with notches 90 in the upper ends. A rod 91 carried on arms 92 is raised by cam gear on a shaft 98. Driving means. A shaft 99 is driven intermittently from the continuously rotating motor 34 through chain, Geneva and multiplying gears. The number of revolutions of the shaft 99 is sufficient to cause the complete cycle of operations in the composer and is timed to bring the projections of the jacquard bars into position just prior to the unit plates passing thereby. The shaft 99 drives the main shaft 98 through bevel gears 100, 100<a>, of which the latter is attached to one half of a clutching device which is brought into engagement upon the operation of any one or more of the permutation bars 73 so that the shaft 98 is operated and the cam gears on the shaft act upon the rod 92, bail 86, and also act to restore the permutation bars 73 at the close of the cycle. Deleting device. A frame formed by vertical rods 131 and transverse rods 130 is mounted on a driven shaft 129. The vertical rods carry springy projections 132 so spaced that they come against any passing studs 59 which are in exhibiting position and return them to rest. In place of the projections 69 on the jacquard bars coming directly into contact with the studs 59, they may operate to set pivoted levers having lugs at each end adapted to engage the bars 64 and the lugs 59 respectively.