Patent GB-190316065-A (GB)
Title: Improvements in Type-writers.
Inventor: CANTELO JOHN LOUIS
Filed: 1903-07-21
Granted: 1904-06-02
Abstract: 16,065. Cantelo, J. L. July 21. Type-writers.-Fig. 4 shows a sectional elevation of a machine having a type cylinder or sleeve K, on which the types are arranged in three longitudinal fields or sets having three rows of characters in each field. The key-levers B, B<1> are pivoted on a rod a<2> in the frame A, and are raised by springs b<2>. They are guided vertically by the slotted parts a' of the framing. The spacing-lever X and the universal lever c, c<2> are also pivoted on the rod a<2>. The type sleeve K is capable of rotary and longitudinal movement on a tubular arm I, fixed on a frame H pivoted on trunnions, so that the type sleeve may be swung down on to the platen p. The sleeve is rotated by a rod i<2> passing through the arm I and provided with a tongue i<3> engaging a longitudinal groove in the sleeve. On the rod i<2> is fixed a helical-toothed pinion i in gear with a correspondingly-toothed sector L attached to the end of a rod capable of rotary and endways movement in a tubular arm J, fixed, parallel to the arm i, on the pivoted frame H. The universal frame is formed of three arms rigidly connected by the rod c<3>, and, in its forward end, is pivoted a rocking frame D having the central pivot rod d. Fixed on this frame D is an arm E having a pivoted piece engaging in a groove k<2> in the type sleeve K, the movements of the arm E operating to set the type sleeve longitudinally at each depression of a key. Attached to the frame D is a stop-bail F adapted to engage stops b<1> projecting up from the key-levers. When a key-lever B or B<1> is depressed, it engages the frame D on the front or rear side of its pivot d, and rocks it until it is stopped by the bail F engaging the stop b<1> on the key-lever. The arm E moves the sleeve K to an extent corresponding to the rocking movement of the frame D. Further depression of the key-lever rocks the universal lever c, and makes the impression by rocking the frame H through the medium of a rod G connected to the lever c and to the frame H. The toothed sector L has a depending arm l<2> carrying a pin l<1> engaged by a notch in the upper end of an arm m fixed on a bar M mounted to move transversely on hangers pivoted on the framing. The bar M has upwardlyprojecting teeth formed with #-shaped upper ends. Some of the key-levers, as they are depressed, engage the inclined sides of the teeth, and move the bar to rotate the pinion i and sleeve K, to bring the proper longitudinal row of characters into position. On the sleeve K are ratchet teeth k<4> corresponding in number and position with the longitudinal rows of characters. On the arm J is pivoted a toothed bar j. When the frame H is rocked by the depression of a key, a roller on an arm g<3> projecting from the rod G engages a pin j<1>, and rocks the bar j until one of its notches engages the flange k<3> on the sleeve K, and one of its projections engages between two of the teeth k'. The type sleeve is thus accurately adjusted at the time of the impression. The bail F is preferably pivoted on the rod d of the frame D, and is capable of a limited rocking movement thereon. When the bail engages a stop b<1>, it is moved relatively to the frame D and rocks a lever z pivoted at z<4> on the arm E. The lower end z<8> of the lever z is forked and engages the end z<7> of a detent Z pivoted at its upper end on the framing. The movement of the lever z moves the end z<7> of the detent from under a projection d<4> on the frame D, thereby permitting the printing movement to be completed. This arrangement prevents the accidental impression of any character other than corresponding with an actuated keylever. The types are inked on their way to the printing point, by a roller y<2> on the end of an arm Y pivoted at y<7> on the upper end of a pivot shaft in a tubular post y' on the framing. The arm Y has projections engaged and controlled by a spring y<8> and stop y<3> on the post, so that the arm moves obliquely downwards when the roller y<2> is engaged by the type sleeve, the roller being carried across the face of the selected type. The roller y<2> is removably held on the end of the arm Y by a pivoted retaining-lever y<5>. For shifting from one type field to another, the toothed sector L with its supporting-rod is moved endways by an arm n<1> operated by two shift-keys N, one at each end of the transverse rod n. On each shift-key is pivoted a latch O having two stop-notches o<5>, o<6>, either of which may be caused to engage a stop o<4> and arrest the descent of the key in one of two positions. On the latch 0 is a finger-piece, which, when depressed, rocks the latch forwards or backwards, according to the point at which the pressure is applied. The latch may be rocked to engage the notch o<5> or o<6> with the stop o to hold the shift-key depressed in either position. The platen p is journalled in the sliding carriage P, which is drawn along by a spring-drum, and is spaced by escapement dogs on a rocker-bar U on horizontal pivots. The dogs engage the rack p<1> on the carriage. The rocker U is operated by a link W connecting it with a lever w, one end of which is pivoted at w<3> to the universal lever, and the other end is connected by a link w<1> to the spacing keylever X. On the link W is a projection w<5> having two stops, one of which arrests the movement of the movable spacing-dog according to the extent of depression of the link. One stop permits of a one-tooth and the other of a two-tooth or double-space feed of the rack. The depression of a key-lever B, B<1> or of the spacing-key X moves the link W to effect a one-tooth feed, but the depression of a key-lever and the lever X together effects a double space. A paper-guide S is fixed on the carriage at s<3>, and is formed with a fold s<4> in which lies the pivot rod of pressure-rollers s<1>. Openings are cut in the guide for the rollers s<1>. On the upper end of the guide S is engraved or formed a scale consisting of alternate broad marks and spaces of equal width. On the carriage is a rod R on which are longitudinally-adjustable margin and carriage stops r<1>, each having a finger engaging the teeth of the rack p<1>, and held in engagement by a spring in the tubular part of the stop r<1>. These stops engage parts of the dogrocker U when the carriage is brought to the ends of its movements. On the rod R is a bail-like clip q<5> for holding the paper down on the platen. One of the stops r' operates a bell hammer pivoted on an inclined post on the framing. The printing point is located by a pointer on the dog-rocker U. Line-spacing is effected by a lever Q having pivoted to it a hooked pawl q<1> engaging a ratchetwheel fixed to rotate with the platen. The lever Q also carries a pin, which lifts the paper clip q<5> off the paper when the platen is rotated. The amount of line-space is regulated by means of a stop-piece q pivoted on the platen spindle. A ledge q<8> on the stop q arrests the movement of the lever Q. The stop q is held in adjusted position by the engagement of a finger piece q<6> thereon in one of a series of notches in the framing.