Patent GB-190702205-A (GB)
Title: Improvements in Typewriters.
Inventor: HEYS WILLIAM GEORGE
Filed: 1907-01-29
Granted: 1907-06-20
Abstract: 2205. Heys, W. G., [Universal Typewriter Co.]. Jan. 29. Typewriters.-Relates to a type-bar action and case-shift for visiblewriting book, flat-platen, or top-strike cylindrical-platen machines. A flatplaten machine is shown in the drawings and the type-carriage arrangement, line-spacing mechanism, and margin-stop arrangement are described. The type-heads t, Figs. 1, 4, and 13, are transverse to the type-bars 5, which are disposed in two groups about an alinement guide b on pivot shafts k, arranged in triangular frames m and operated by cranks e from the key-levers i, so that the type-bars swing across the line of vision. The type-heads t are approximately parallel to the corresponding pivot shafts k. The type-bars in each group are mounted in a row radiating from the printing point, the pivot shafts k converge, and the type bars and heads are arranged in Úchelon, as shown in Fig. 13. The several typefaces on each head are at different inclinations, and the shift movement comprises a rocking movement of the frames m about pivots on a swivel o and a box p, and a transverse movement of the box p. When the type-faces are in one plane, as may be used with a cylindrical platen indicated in dotted lines at 62, Fig. 13, the rocking movement is not required. Fig. 7 shows the shift-key mechanism ; the shift-key levers 18, 26 operate an arm 9 on a rock-shaft 13 by means of slots 20 and a crankpin 10, and an arm 5 loose on the shaft 13 by means of cams 21. From two arms 9 on the shaft 13, the two frames m are rocked through connexions 37 with gauge arms q, moving between stops r. The boxes p have connexions 11, 12 with the shaft 13, and are retained by yokes fitted with stopscrews for studs 2 on the boxes. Locking-dogs 3, 4, loose on the shaft 13 and connected in pairs by cross-bars 16, 17, co-operate with the studs 2. The arm 5 actuates the dogs 3, 4, the adjacent dog 3 being lifted by a finger 22 on the arm 5, and the adjacent dog 4 by a pin 25 on a lever 24 depressed by the finger 22. The shift-keys are each provided with a catch 27 for engagement under the guidebarj of the key-levers i. Detachable connexions are provided between the cranks e, Fig. 13, and key-levers i, and comprise a screw-threaded socket w hinged on the key-lever ; a stem y adjustable-in the socket w and provided with a crank-pin fitting in an eye in the crank e ; and a spring z bearing on the end of the crank-pin to retain it in the eye. The key-levers i are mounted on fulcrum-plates f in two diverging groups, as shown in Fig. 1. The cranks e are arranged in a line between the frame pivots and this line is preferably parallel with the fulcrum-plate f, so that the key-levers i make uniform connexions with the cranks e. The typeheads t rest on a cushion on supports 3<1>, Figs. 1 and 13. The alinement guide b, Figs. 1 and 4, comprises two jaws, and the type-heads are provided with notches on one side only, one jaw only being provided with the guiding-teeth c. The bed a, Fig. 1, supporting the type-bar mechanism, traverses on the carriage, and is guided at the rear by grooved rolls 40 running on a cylindrical guidebar 41, so that the bed can be turned on the guidebar. The guide-bar has a longitudinal adjustment through a letter space by means of a screw-threaded sleeve, engaging a tooth 67 and operated by a handle 68. The guide-bar carries the feed-rack of the usual letter-spacing devices. The line-spacing movement of the carriage is effected by a pinion 45 engaging a rack 44 on the platen frame. The pinion 45 is actuated by a spring pawl 47, Fig. 8, on a lever 46, normally retracted by a spring 66 so that the pinion 45 is free and the carriage can be adjusted according to a printing-line index 50. The lever 46 is depressed automatically on return of the bed a by means of a catch 57 on a toothed arm 51 engaged by a rack 52 movable on the carriage by the engagement of a trip on the bed a with an adjustable dog on the rack. This dog serves as the margin stop, a tail-piece 55 on the catch 57 temporarily locking the pinion 45 and the rack 52, and at the same time effecting release of the catch 57 from the lever 46, which is returned by the spring 66. Provision is made for variable spacing by an adjustable stop 56 for the piece 55. On the advance of the bed a, the piece 55 is disengaged from the pinion 45 and the catch 57 is re-engaged with the lever 46 by return of the rack 52 by a toothed arm 54, Fig. 1, connected with a spring 53.