Patent GB-190828145-A (GB)
Title: Improvements in and relating to Typewriting and Similar Machines.
Inventor: CRISP CHARLES
Filed: 1908-12-24
Granted: 1910-03-24
Abstract: 28,145. Crisp, C. Dec. 24. Typewriters and like-machines.-(1) Type actions for line-printing type-wheel and sliding type-bar machines applicable also to the production of stereotype matrices, stencils, perforated paper, &c. The type-wheels A, Fig. 1, can rotate in either direction under the influence of weights K, and are normally held stationary by hooked arms L engaging projections J on the wheels. Beneath each wheel is a series of vertically-sliding stops g adapted to be projected by the keys into the path of projections J, J<1>, J<x> on the wheels, which are thereby arrested at different points of their rotation. The stops are preferably of the form shown in Figs. 3<b> and 3<c>, so that they are frictionally held in position in their bed H ; or the friction may be applied by a comb-like device b<1>, Fig. 3d. The stops g are raised by a row of sliding pins f, mounted in a travelling carriage F and operated by universal bars P and rotating rods c from the keys E. The projections on the type-wheels are of two or more different lengths, and the stops g can be projected by separate keys to different extents so that each stop represents a number of characters of the type-wheel. The carriage F is moved on, step by step, by an escapement operated by the universal bars P so that it comes to rest beneath each type-wheel in succession. A projection on the carriage withdraws the hooked arms L in succession so as to permit the wheels to be rotated by their weights K. The stops g are in the form of a split pin or equivalent device so that the projections on the type-wheels are gradually brought to rest between the two portions of the stop ; or the arrangement may be reversed and the split portions placed on the wheels. Before the printing occurs, the type-wheels are alined by a knife X which is mounted between the platen supports and engages notches in the wheels. After printing, the type-wheels are returned to normal position by a collecting-frame Y, which rotates on the shaft B of the type-wheels, engages the projections on the wheels, and is operated by a rack o<1> during the up-stroke of the printing-lever O. The stops g are pulled down by a grid device, which engages shoulders on the stops and is operated by the printing-lever. The type-wheels are caused to rotate in the opposite or clockwise direction by a pawl 9, which is moved by a shiftkey 2 into the path of the projections Jx on the wheels. The pawl 9 by a kicking action causes the weight K to pass the vertical axis of the wheel so that it rotates in the clockwise direction. The pawl 9 is connected with the travelling carriage F so that it may act on each wheel in succession. A device 'moving with the carriage F and operated by a special key is provided for pulling down an incorrectly-set stop and for returning the wheel arrested by it to normal position. According to the Provisional Specification, the type-wheels may be replaced by travelling or reciprocating bars. (2) Justifying-mechanism. The type-wheels are separated by springs a<1>, Fig. 10, disposed between adjacent wheels. The last few wheels have holes a' which normally register with pins a<3>, and the end wheel bears against a rod q<7> which is withdrawn by the operation of the printing-lever. The last wheels which have not been operated then slide on to the pins a<3>, but the boles in the last operated wheel no longer register with the pins a3 so that the wheel is arrested thereby. (3) The platen N is supported by brackets n on sliding rods q, and is pulled down on to the type-wheels by depression of the printing-lever O. (4) Linespacing mechanism. As the platen rises, it is rotated by stationary pawls n<1> which engage ratchet-wheels on the ends of the roller. (5) The inking or carbon ribbon X, Fig. 12, is arranged in known manner at an angle to the line of type. (6) Type-wheels. According to the Provisional Specification, the type-disks are stamped out with a serrated circumference upon which a characterbearing strip or strips can be secured.