Patent GB-190216314-A (GB)
Title: Improvements relating to Typewriting Machines
Filed: 1902-07-22
Granted: 1902-10-30
Abstract: 16,314. Leganke, C. F., Stackpole, R. D., and Fisher Book Typewriter Co. July 22. Type - writers. - Relates to machines for writing upon a sheet spread out on a flat platen, the writing-mechanism travelling to and fro over the paper as the writing proceeds. The machine is shown in perspective view in Fig. 1, and in longitudinal section in Fig. 5. Fig. 4 shows the platen with the machine removed and the workholding frame raised. The writing-carriage 2 is adapted to traverse a frame 1 which works upon the main track - rails 3, these being toothed for the greater portion of their length to engage with the pinions of the linespacing mechanism. The work-holding frame comprises parallel members 27, 28 connected by end plates 31, 32 and secured by arms 30 to the track-rails 3. The toothed portions of the trackrails are hinged at 6 to the rear sections 5, which are secured to the platen 4. When the travelling frame 1 is pushed back to its rearmost position, it rests on the sections 5, and the hinged rails 3 are free to rise with the work-holder. A transverse rock-shaft 10, Fig. 5, tensioned by coiled springs 11, bears arms 7, Figs. 4 and 5, terminating in antifriction rollers 9, and, when the rails 3 are relieved from the weight of the frame 1, the arms 7 lift them, as shown in Fig. 4. The platen 4 comprises a metal plate 12 faced with a suitable writing-surface 13. At each side of the platen is a guard rail 15 grooved at 16 to receive retaming-gibs or keys on the travelling frame 1 ; the work-holder, track bars, and travelling frame being thus positively held down on the platen while writing is procceding. Stop projections 18 limit the rearward movement of the travelling frame, and the hooked portion 26 of a latch 19 covers the open end of the groove 16, and thus limits its forward movement. When the latch is snapped over to uncover the groove 16 and allow the machine to be removed, the hook 26 engages a notch 26<a> in the track-rail 3 and locks the work-holder in the depressed position. The members 27, 28 of the work-holding frame are grooved at 34, 36 to receive and guide the edges of a carbon duplicating-sheet 35, of which the unused portion is wound on a bobbin 42 and the used portion on a bobbin 43 carried by the track-rails 3. The machine is specially adapted for writing on a folded bill or sheet, usually perforated at the fold. The bill is slipped over the member 27, against which the bight or line of fold abuts. The lower or duplicating portion of the bill rests on the platen, and the upper portion overlies the carbon sheet, which is thus enfolled by the two leaves of the bill. The arms 30 have inclined aligning-edges 33, which constitute guides for positioning the folded bill endwise. A work-gauge 37 is rigid with the work-holding frame, and its lower surface is flush with the lower surface of the left-hatrd rail 3, the work-gauge being thus normally in contact with the platen]. Pins 38 depend from the workgauge, or enter sockets 39 formed in the platen. When the bill is slipped into its place on the work-holding frame, the file holes in the lower sheet of the bill are disposed over the sockets 39, and, when the track-rails are depressed, the pins 38 pass through the file holes in the work and secure it positively in the aligned position. The top edge of the bill is gripped by a work clamp 68, which is depressed by the forward movement of the travelling frame. The spools 42, 43 are easily removable, the former having open bearings at both ends and the latter an open bearing at 53 which can be closed by a notched plate 50. Guide-rollers 57, 55 support the carbon sheet where it enters and leaves the platen. The machine is provided with two inking - ribbons adapted to print in red and black ink. The supporting and shift mechanism for these ribbons may be of any suitable character. In a modified form of the machine, the spool 43 is journalled in bearings on the front edge of the platen, and the carbon strip passes over the platen independently of the work-holding frame. In this case, the duplicate or lower portion of the bill may be of transparent paper, both portions being above the carbon sheet, instead of embracing it. An inked cloth or like copying-surface may be fixed on the platen when the work is of the nature just described, the carbon sheet being dispensed with.