Patent GB-191502700-A (GB)
Title: Improvements in Typewriting Machines.
Inventor: JAMES REGINALD WILLIAM
IPC: B41J19/54
Filed: 1915-02-19
Granted: 1915-08-12
Abstract: 2700. James, R. W., [Remington Typewriter Co.]. Feb. 19. Type-lever actions; case-shift mechanism; shiftkey actions.-(1) The type-lever segment 26, Figs. 1 and 3, and rest 27 are firmly connected by side rods 28 and a central bar 29, and are supported for case-shift at the sides by parallel arms 30 on a rockshaft 32, and at the centre by links 31 mounted at the rear on a pin 35 and connected at the front by a pin 37 to arms 38 of, a bracket 39, through which extends a screw-threaded stud 40 fast in a lug 41 on the segment 26. Nuts 43 on the stud 40 clamp the bracket 39 to a traverse bail 42, which is attached near its ends by nuts 62 to vertical rods 60 fast in lugs 61 on the segment 26. The ends 63 of the bail 42 are provided above and below with pads 65 to limit the case-shift movement, in the upward direction by contact under blocks 64 cast on the sides of the machine frame, and in the downward direction by contact upon plates 71 adjustable on screws 69,70 in lower blocks 68. Duplicate shift-key levers 58 on opposite sides of the machine are connected by links 57 to arms 56 on a rock-shaft 55 carrying a central cam 53, which co-operates with a roller 47 on a frame 44, 45 adjustably attached to the links 31 by bolts 48, 49 extending through slots in the frame. The shift into the lower position is effected by depression of either shift-key ; the parts are returned to the normal upper position by a spring 66. (2) The type-levers 74, 75, Fig. 1, are mounted in two rows of hangers 72, 73 on the segment 26, and are connected by links 80 to levers 78 mounted on a common pivot-wire 79 in a slotted segment 77 formed on the back of the type-lever rest 27. The levers 78 are connected by links 81 to levers 17 mounted in hangers 21 on a fixed segmental support 20. The levers 17 are connected to the key-levers by lioks 14 engaging over hooks 15 on the key-levers ; springs 16 riveted to the keylevers normally retain the links in engagement, but allow easy disengagement. Returning-springs 82 are connected to the lower arms of the levers 78 and also serve to prevent lost motion in the links 80, 81. The levers 78 swing in the same planes as their corresponding type-levers ; when a type-lever is operated, the upper arm of its lever 78 moves into the space normally occupied by the type-lever on the rest 27, and the force acting is confined to a single plane from the front end of the link 81 to the pivot of the type-lever. The links 81 are so arranged that they are inclined to the vertical plane containing the pivots of the levers 17 substantially to the same extent in both case-shift positions, the links swinging on their rear pivots and having lost motion in the front pivots on the levers 78, so that in the case-shift movements the levers 17 are not disturbed and the relations of the levers 78 are not affected. (3) Type-lever repulsers 95, Fig. 1, slide through holes in a curved guide-plate 93 and are advanced by springs 88 connected to levers 87 loosely engaged in slots in the repulsers. The levers 87 are mounted on a common pivot-wire in a slotted rib 85 on the back of the segment 26, and swing in the same planes as their corresponding type levers. Letter-spacing mechanism; space-key actions.-A universal bar connected to escapement mechanism is actuated by impact of the type-levers in both case-shift positions. For this purpose, the repulser levers 87, Figs. 1 and 3, are curved at their rear edges to rock across the face of an arcuate universal bar 102 ; the levers rock across the upper or lower half of the face according to the case-shift position of the segment 26. The bar 102 is carried by three arms 103, 104, 105 pivoted to arms 106, 107, 108 on two rock-shafts 109, 110, which are connected together by means of arms and links 113 .. 118 ; springs 119 return these parts to normal position. A projection 121 of the arm 105 is connected by a rod 122 with the escapement-dog rocker 123. A cross-rod 12 of the space-key is loosely connected by a rod 131 to an arm 130 on the shaft 110.