Patent GB-191300561-A (GB)
Title: Improvements in Embossing-typewriters.
Inventor: SLOAN ROBERT ALEXANDER
IPC: B41J3/38
Filed: 1913-01-08
Granted: 1914-03-09
Abstract: 561. Sloan, R. A., [Montague Mailing Machinery Co.]. Jan. 8. Type-wheel machines for embossing metal.-Relates to machines for embossing metal of the kind in which a die-wheel carries upper and lower sets of sliding dies, and comprises the provision of two radial levers and an axial slide for operatiog the dieplungers. Index setting - arrangements; driving-mechanism; hammer-impression arrangements; alining for impression.-(1) The machine shown in Figs. 2 and 3 is power-driven and comprises a die-wheel 1 carrying dies 6, 7, provided with studs 14 engaging plates 15, 16 which are engaged by a number of springs 17 and serve to return the dies after each operation. The plates engage retaining- rings 18, 19. The die-wheel is mounted by ball bearings on a hollow post 25, which is secured by nuts 26, 27 and acts as a tie between the upper and lower parts of the framework. The bearings are adjusted by means of a clutch-collar 31 which engages a screwed sleeve 30. The die-wheel is connected by bevel-gearing 2 to a setting-knob 4, and is connected by gearing 24 to a pointer 21 reading over an index-dial 20. The die-plungers 12, 13 engage radial levers 26<1>, 26<x> which are pivoted at a, d and are connected by an axial slide 32 arranged in the post 25. The slide is connected by a rod 32 to a crank-pin 34 on a shaft 38 carrying a loose-driving wheel 39 which is provided with a one-revolution clutch. (2) The clutch preferably consists of a disk 40 which is secured to the shaft and is provided with a spring-pressed pin adapted to engage slots in the driving-wheel. The pin is normally held retracted by a wedge 43 which is secured to a rock-shaft 44 and is provided with an arm m adapted to be engaged by a cam on the disk 40. In operation the die-wheel is set by means of the knob 4 and the shaft 44 is then rocked by means of a handlever 47, the wedge being thereby lifted and the pin permitted to engage the driving-wheel. The shaft makes one revolution and is then arrested by the withdrawal of the. pin by means of the wedge, this being re-set in the path of the pin by the action of the cam on the arm m. (3) The alinement-detent is lifted by means of a cam-lever 51, into engagement with a toothed part of the retaining-ring 19 on the die-wheel. To ensure a quick action of the alinemeat-detent, the lever 51 is given a greater movement than is required to lift the detent and the excess movement is absorbed by a spring 55 which drives the detent. (4) In the machine shown in Figs. 16 and 17, the radial levers 26<a>, 26<b> and the axial slide 32<a> are arranged so that the strains set up during impression tend to press the frame-members together instead of tearing them apart as in the machine described above. The lever 26<a> is pivoted at 26<x> and is connected by the axial slide 32<a> and a yoke 98 to an eccentric A on a shaft a<x>. The lever 26b is pivoted at 97 and is forked to engage eccentrics B on the shaft a<x>. The levers 26<a>, 26b engage plungers 12, 13, the lever 26<b> being provided with a bearing-ball 26<d>. The shaft a<x> is rocked backwards and forwards through a quarter of a revolution at each operation, preferably by means of a hand-crank 99. The die-wheel is set by a knob 4<a> geared to a shaft which is geared to the die-wheel and carries a pointer 20 reading over an index-dial. Matrix carriages and supports; matrix clamping- arrangements; carriage scales.-The metal blank is mounted in a carriage shown in Figs. 2 and 3 and comprising a frame 57, 58, 59 and a pivoted bar 60, which is tensioned by a spring 62, the blank being arranged between the bars 57, 60. The bar 60 is grooved to receive the blank; and the bar 57 is formed with lugs 70, 71 to engage the blank. The bar 60 is provided with a scale 60<a>. The bars 58, 59 are mounted to slide for line-spacing in guides 88, 89, secured to a hollow bar 87, which can slide for letter-spacing in a fixed guide 94 provided with rollers 95<x>. Line-spacing mechanism. - The bars 57, 59 of the carriage are provided with racks 61 engaging pinions 62 on a shaft 64 which can be rotated for line-spacing by hand-knobs 65, 66. The knob 66 is provided with a notched flange s engaging a detent-roller 67, which is mounted on a lever 68 and is engage by a spring 69<x>. Letter-spacing mechanism.-The machine shown in Figs. 2 and 3 is provided with letter-spacing mechanism of the following character. A rack 92 on the carriage gears with a vertical shaft 73 provided with a friction-brake consisting of a flange 74 arranged between the frame-plate t and a leather washer 75, which is pressed downwards by means of a disk 76 adjustable by a screw 77. The shaft 73 carries a ratchet-wheel 78, which is engaged by a pawl 79 on a lever 80 connected by a link 81 to hand-lever 82 which is pushed to the right for spacing between words, the pawls 79 being operative during the return movement of the lever 82 by means of a spring 83. The ratchetwheel 78 is operative automatically for spacing between letters by means of a pawl 84 on a lever 85 connected by a link 56 to the cam-lever 51 which is rocked at each impression. In the machine shown in Figs. 16 and 17, the letter-spacing mechanism is ar anged so that a full-stroke of the hand-lever 99 operates both the letter-spacing and the impression mechanisms, but a half-stroke of the hand-lever operates the letter-spacing mechanism for spacing between words, but does not give a long enough stroke to the plungers 12, 13 to operate the dies. The mechanism comprises a pawl 103 on a lever 104 connected by a link 105 to a lever 106 controlled by a cam 107 on the shaft a<x>, which carries the hand-lever 99. A full-stroke of the hand-lever retracts the pawl over one tooth and part of another tooth of the ratchetwheel 102, and, on release, the pawl is returned by a spring 108 and operates the ratchet-wheel through one tooth. A half stroke of the hand-lever retracts the pawl over one tooth and thus imparts the same feed as a full stroke. The hand-lever is provided with a finger 99<b> arranged under a guard 99<a> which serves to arrest the hand-lever when a full-stroke is given and is provided with a mark for showing the half-stroke position. Carriage-releasing arrangements.-The feed-rack 92, Fig. 2, is pivoted and can be pressed backwards for carriage-release by means of thumblevers 91. The rack is normally held in engagement by means of a spring-pressed roller 92.