Patent GB-191007330-A (GB)
Title: Improvements in or relating to Typecasting Operations.
Inventor: CRISP CHARLES
IPC: B41B3/00
Filed: 1910-03-23
Granted: 1911-06-26
Abstract: 7330. Crisp, C. March 23. Single-type composing and casting machines; keyboards and driving-mechanism.-A matrixsetting apparatus for use in composing and casting single types is of the same character as the line-printing typewriter described in Specification 28,145/08, comprising a series of matrixdisks which are rotatable in either direction for character selection. The disks a<2> are each arranged over a series of stops a<5> which cooperate with a series of pins a<9> mounted in a travelling carriage a<8>, the pins a<9> being arranged over a series of longitudinal bars b which are connected to the keys a<4>. The carriage is connected by jointed levers b<9> to a spring drum b<4>, and is moved step-by-step across the machine under the control of the mechanism shown in Fig. 7, comprising a shaft b<5> which is controlled by an escapernent b<8> and is formed with an archimedean screw which engages the carriage. The escapement is the same as that described in Specification 7755/11, and comprises a rocking arm which is operated by all the keys and is provided with fast and loose dogs c<1>, c<Î> which engage an escapementwheel c. The means for rotating the disks comprises a " kicking-member " b<1> which is slidably mounted on a square shaft b<2> and is connected to the carriage a<8> by a link b<3>. The shaft b<2> is adapted to be driven in either direction from the shaft b<5> by means of sets of gearwheels b<6>, b<7>, which respectively drive the shaft b<2> in the same direction and the opposite direction to the. shaft b<5>. The sets of gear-wheels are alternately clutched in by clutches d, d', which are connected by links d<3Î> to a " change- " key ". When a key a<4> is pressed, the corresponding bar b raises one of the pins a<9> and thereby projects the corresponding stop a<5>. Upon release of the key, the kicking-member b<1> impinges on a lug on the disk and causes the disk to rotate to the set position determined by one of the lugs d' and the stop a<5>, the carriage a<8> then stepping forward to the right to the next disk and the projected pin a' dropping by gravity to the normal position. The stops a<5> and the lugs d' may be formed from springs so as to grip one another. The disks a<2> are mounted on rollers a<3> and are balanced so that when slightly displaced they will rotate in the direction of displacement. The disks are held in normal position by the engagement of notches a<7> with the top rollers a<3>. Each of the stops a<5> may select two characters on the disks, the character selected being dependent on the direction of rotation of the disks as determined by the " change-key." In some cases the stops a<5> may each be arranged to be projected to a number of levels so as to be capable of selecting a number of characters, the disks being in this case provided with a corresponding number of stop-lugs d<3>. The travel of the carriage a<8> is limited by adjustable stops c<8> each consisting of a sleeve which may slide on the frame and is provided with a spring locking-catch adapted to engage a rack. When the required number of disks have been set, the carriage a<8> is returned by means of a link which is operated by the alinement-lever c<Î> described below, the link and the lever being provided with a spring connexion which yields when the carriage is arrested by the stop c<8>. The alinement lever c<x> is operated by a cam c<13>, and is connected to rods d<4> which control devices for alining the set matrices and for returning the disks and the stops a<5> to initial position. The alining-device consists of a longitudinal bar d<5> which is adapted to engage notches d<6> in the disks, and is operated by cams d<8> which are engagable by lugs e, e<1> on one of the rods d<4>. The bar is brought into engagement with the disks on the down-stroke of the rods and is released on the up-stroke. The disks are returned to the initial position by means of a " collecting-frame " comprising a longitudinal bar e<6> which is pivotally mounted on a frame e<5> consisting of side arms which are pivoted on a shaft c<3>. During the down-stroke of the rods d<4>, a pawl e<7> rotates the frame e<5> and brings a projection thereon into engagement with a latching-lever e<8>, the rotation of the frame also bringing a projection on the bar into engagement with a spring f<1> and thereby moving the bar against the tension of springs e<12>. During the up-stroke of the rods d<4>, a lug e<9> thereon releases the latch e<8> and permits the springs f to return the frame e<2> to the initial position, the bar being thereby released from the spring f<1>, thus permitting the springs e<12> to swing the bar and thereby return the disks by engaging notches e<4>. The " collecting-frame " returns the disks in the same direction regardless of the direction of rotation during setting. The disks are arrested in the initial position by the ' engagement of the notches a' with the top rollers a<3>, a comb being provided for retarding the disks near the time of engagement. The comb consists of spring-fingers f<3>, f<4> carried by links f<2> which are controlled by tappets f<6>, f<10> on the rod d<4>. During the down-stroke, the tappet f<6> brings the fingers down on to the disks so that on the return of the disks during the up-stroke, the lugs d<3> enter between the fingers and are retarded, the fingers being afterwards swung back clear of the disks by the tappet f<10>. The stops a<5> are restored by means of a frame a<10>, which engages bosses a<11> on the stop and is depressed by the rods d<4>. The connexion between the rods d<4> and the frame a<10> consists, as in Specification 28,145/08, of a bell-crank lever which rides off an abutment when the frame a<10> has been depressed and thus permits the rods d<4> to continue their stroke. The correction of errors is effected by a device similar to that described in Specification 28,145/08, comprising a series of catches mounted on the carriage a<8> and operated by a key to depress the erroneously set stop, the corresponding matrix - disk being returned to the initial position by a spring-operated lever on the carriage. A comb similar to the comb f<2> may be provided in connexion with this device. The frame a of the apparatus is mounted on slides b<11> and is drawn up against the moulds b<15> during the casting operation by means of a cam b<12> which is connected to the frame by links b<13>, b<14>.