Patent GB-190815049-A (GB)
Title: Improvements in Typewriting Machines.
Inventor: FELL JOHN CORRY
Filed: 1908-07-15
Granted: 1908-10-08
Abstract: 15,049. Fell, J. C., [Brown, A. T.]. July 15. Typewriters. - Typewriters are provided with tabulating-mechanism whereby the carriage may, without previous arrest, be brought to any selected column, or to any selected denominational position in any selected column. Means for " reverse tabulation " are also provided so that the carriage may be arrested at the same letter-space position, whether it be moving to the left under the impulse of its driving-spring or whether it be moved to the right by hand. Hanging on arms 2, Fig. 1, from the carriage 3 is a column-stop bar 1 supporting stops 14, Fig. 8 (four being shown), which are provided with central lugs 14 and lugs 15 laterally displaced to a varying extent. The denomination stops 10 work in a guide 11, and are pivotally carried by the right-hand arms of yokes 8, pivoted at 9, the left-hand arms of which are secured to levers 7 operated by keys 5. The key of highest denomination is at the extreme left. The guide 11 is mounted on a frame 16, pivoted at 17 and having an arm 19 provided with a roller 20, Fig. 3, which normally engages the upper part of an inverted V-shaped slot 21 at the rear end of a lover 22 pivoted at 23. Four column keys 25, 26, 27, 28 operate levers 29, 30, 31, 32, pivoted at 23 and having cam-shaped rear ends adapted to act upon the roller 20, so as to rock the guide 11 to two different extents either to the front or rear of the machine. Thus the key 25 rocks the guide 11 to its full rear extent, and, a denomination key being operated, the corresponding stop 10 co-operates with the lug 15 of the extreme left-hand stop 4, Fig. 1, to arrest the carriage in the first column field. If a column key be not operated, depression of a key 5 causes its stop 10 to co-operate with the lug 14 of the first stop 4 which it encounters. Fig. 3 shows the column keys numbered in accordance with the columns they select. A feedrack 41 on the carriage meshes with two pinions 42, 43, the former being coupled with. a driving- spring 44, and the latter meshing with a pinion 45 having normally a clutch connexion with a toothed member 47, rotatable with but slidable upon a shaft, the rotation of which is controlled by an escapement. A lever 50, Figs. 1 and 18, is connected to an arm 56 on a shaft 53, the bent end 55 of which extends over all the column key-levers, so that depression of a column key throws out the clutch and releases the carriage from its escapement. A suitable escapement is described in Specification No. 4810, A.D. 1907. Pivotally mounted on the shaft 53 is a block 61 to which is secured a universal bar 58, 59 extending over the yokes 8, and to an arm 68, rigidly mounted on the shaft, is pivoted at 70 a floating lever 69 having a pin-and-slot connexion 73, 74 with an arm 75 projecting from the block 61. A pin 71 on the arm 68 engages in a hole in the lever 69 so as to limit the rocking of the lever. A stop rod 77 similar to the rods 10 is connected to the rear end of the lever 69 and is situated at the extreme left of the set of denomination stops, thus constituting the stop of lowest order. Depression of a denomination key releases the carriage but does not raise the stop 77 ; depression of a column key, without depressing at the same time a denomination key, causes the stop 77 to be raised into the path of one of the lugs 15 on the column stops. The motion of the floating lever in this instance does not raise the universal bar 58. A denomination key 13 operates a lever 78 and yoke 79, the left-hand arm of the latter not being extended beneath the universal bar 58, and the right-hand arm being curved downwards at 79, Fig. 2, to lie beneath the pin 71, so that depression of the key raises the stop 77 into the path of the lugs 14 and simultaneously releases the carriage. The frame 16 supporting the guide 11 is movable towards the right against the action of a spring to an extent equal to the combined widths of the column and denomination stops at their point of contact, so that, when pushed to the right for " reverse tabulation," the carriage may be arrested at the same point as when moving to the left. At this point a rod 88, pivoted to the arm 19, moves out of the path of a lever 85, Fig. 18, pivoted on the lever 50 and having a pin-and-slot connexion with the arm 56 on the shaft 53 ; the consequent release of the lever 50 brings the clutch members 45, 47 into engagement and the carriage under control of its escapement.