Patent GB-190724803-A (GB)
Title: Improvements in and relating to Type Casting and Composing Apparatus.
Inventor: ELLIOTT RICHARD CORNELIUS
Filed: 1907-11-08
Granted: 1908-11-09
Abstract: 24,803. Elliott, R. C. Nov. 8. Monotype and like machines.-Relates to justifying-mechanism for type-casting or composing machines employing controllers, Specifications No. 18,638, A.D. 1899, and No. 11,140, A.D. 1907, being referred to. The space occupied by the type in a line is recorded in units by a wheel C and in " ems " by a wheel D, the wheel C being operated by a differential gear comprising, in the example shown, three ratchet-wheels A', A<2>, A<3>. The wheel A<1> is rotated through a tooth space when a key corresponding to a type of two units is depressed, and the wheels A<2>, A<3> are similarly rotated for type of three and five units respectively, the pitch of their teeth being arranged accordingly. Each wheel is mounted upon a drum a and rotates upon a shaft H ; within the drums are bevel-gears A' . . . A<7>, the first being secured to the shaft and the last having a pinion A<8> gearing with the wheel C. One or more bevel-wheels A<9> on each ratchet-wheel gear with the wheels A<4> . . . A' as shown. The differential gear is under the influence of a spring connected to a gear-wheel A<13> and a ratchet-wheel, Fig. 2, so that the wheels A', A<2>, A3 always tend to rotate. The ratchet is rotated through a tooth space at each depression of a character key by means of a pneumatic piston A<18>, the tension of the spring being thus kept constant. The rotation of the ratchet-wheels A', A2, A<3> is controlled by bars E, Fig. 4, pivoted at e and having stops E<3> normally engaging the wheels. Each wheel is rotated through one or two tooth spaces according as one or other of two key operated bars F is raised. Rocking of the bar E . to the right brings a stop E<4> into and puts the stop E<3> out of action, and after the return movement of the bar the wheel has been allowed to rotate a single tooth space. Rocking of the bars E to the left brings a spring-controlled sliding stop E<5> into action, so as to allow rotation of the wheel through two tooth spaces. The bar E coacting with the wheel A<2> is diametrically opposite the other two bars. The cumulative action of the wheels is imparted to the wheel C. The ratchet-wheels A<1>, A<2>, A<3> are connected to the members carrying the bevel-wheels A<9> by means of spiral springs, so as to prevent the differential gear from lagging behind the movement of the keys. The " ems " wheel D is driven by the units' wheel C and during its motion, towards the end of the line, a pin thereon operates a segment and pinion to rotate bevel-gearing B', B<2> driving the justification drum B. A pointer D<3> on the wheel D is set, before composition commences, to indicate the length of line to be employed, the composition being completed when the zero on the wheel scale comes opposite a pointer d<1>. A stop D', adjustable by means of an eccentric upon the pointer D<3>, strikes a stop C<2> when the wheel is returned after completion of the line, the wheel C being disengaged from the pinion A<8> for this purpose by means of a pneumatically-operated pivoted arm K supporting the shaft c. Teeth d<2> on the pointer D<3> are held in mesh with teeth on the wheel D by means of a spring d<3>. A spring D<2> tends to return the wheel D, the drum B being simultaneously returned. A space-counting or index arm G connected by ratchet mechanism with the justification space key coacts with the drum to give indications of the justification fraction, which need not be in terms but may, if applied to a machine such as is described in Specification No. 22,208, A.D. 1897, represent the keys that must be depressed to make the justification perforations in the record-strips When applied to a machine wherein the adjustment of the mould for the space type is effected wholly or partly automatically, the drum is built of snail cams side by side equal in number to the largest number of space type likely to occur in the longest line. The drum is fed from the differential gear and is moved endways step by step as the space key is depressed, to bring the cams in turn opposite a feeler. When the line is ready for justification, the feeler is pushed against the drum in order to limit a hand-imparted motion or to affect automatically the mould adjustment ; it may however indicate the justification fraction. The feeler may also be constantly in contact with the drum. When the mechanism is applied to the machine described in Specification No. 11,140, A.D. 1907, the feeler M, Fig. 11, which is moved up to the drum by band or pneumatically, actuates by a lever M<1> the wedge controlling the width of the mould slot N<7>. A piston in an air cylinder N<2> presses against the rod M<4> to hold the wedge in position. The differential-gear operating-bars F are in this machine actuated by the key-operated members which control the delivery of the selected controller plates. According to the Provisional Specification, the justi5cation drum may determine the movements given to a screw controlling the justification wedge in a machine such as is described in Specification No. 11,140, A.D. 1907 ; the pointer, such as G,' co-operating with the drum may be returned to zero after justification by gravity or spring power ; in a modification, the wedge is connected with, but not coupled directly to the feeler ; the drum and feeler may be restored to zero position by the return of the assembly trough ; the ratchet-wheels of the differential gear may each rotate through angles of various amplitudes as required ; the power for driving the ratchet-wheels may be derived from a spring wound up by the key actuation under the control of a let-off or hunting gear, or of a spring escapement or buffer; the movements of the release arm K may be under the control of the assembly trough ; and an index may be provided for determining the adjustment of the stop D<4>.