Patent GB-190011495-A (GB)
Title: Improvements in Typewriting Machines.
Inventor: PETERSON CHARLES EMIL
Filed: 1900-06-25
Granted: 1900-11-10
Abstract: 11,495. Peterson, C. E. June 25. Type-writers.-On a base A, Fig. 3, are side pieces a supporting a cross-piece a<1> on which the paper carriage G runs. On the side pieces a is a transverse slotted bar a<3>, with which the notched ends b<1> of the key levers B engage. A slotted bar a<6> guides the levers B, and they are raised and held in engagement with the bar a<3> by springs a<4> in recesses. in the bar a<5>. The levers B engage cam slots c, c' in a pair of cam bars C, C<1>, Fig. 5, placed side by side. Each cam bar is pivoted at its ends to a pair of depending levers, one at each side of the machine. The lower ends of each pair of levers carry a rack bar c<5>, and these rack bars engage opposite sides of a pinion c<6> on the shaft c<7> of the type-wheel D. The cam bars and type-wheel are returned to normal central position by means of cam notches e in the bars engaged by the end E of an arm e<1> fixed on a shaft a<8> having an arm a<9> pulled by a spring a<10>. The arm e<1> is also fixed to a bar a<11> carried by arms fixed to the shaft a<8>, and engaged by all the levers B, so that, when a key lever B is depressed, the arm E is depressed out of the notches e. The carriage G has a bar g sliding in the parts a' of the framing. The plate g has ratchet teeth on its lower edge engaged by a detaining-pawl and a feed pawl operated by a spring and by an arm h<3> fixed to the cross-bar a<11>. Both pawls are moved out of engagement, for the return of the carriage, by a finger lever pivoted on the bar a<1>. In the carriage' are paper-feed rollers g<2>, g<3>, one of which g<2> is provided with a knob for turning it and with a notched wheel engaged by a detent. A shield g<7> is provided to enclose the paper. At each end of the carriage is a bracket carrying a ribbon spool, the ribbon passing from one spool to the other. One spool is rotated by a ratchet thereon engaging a fixed arm on the framing as the carriage moves past. The impression hammer F is pivoted at f in brackets f<1>, and is operated by a slotted link f<3> engaged by a pin on an arm f<5> fixed to the shaft a<8> and cross-bar a<11>. Two frames K, K<1> of wire pivoted at k<1> engage the paper and hold it opposite the type-wheel D. These frames may be pushed back for inspection of the writing, and are returned to normal position by a spring. The type-wheel is provided with three rows of characters, and is shifted by a sliding rod d raised against the pressure of a spring d<3> by a shift key lever engaging the collar d<2>. The shift key lever has fixed upon it two finger pieces, which cause its movement to be limited by a stepped slot according to which finger piece is used to depress it. The rod d has a arm d<4> engaging under the collar d<5> of the type-wheel, and an arm d<8> engaging over the collar. The arm d<8> is formed with a strip d<6> pressed down by the spring d<3> against the collar d<2>. A pin d<10> on an arm d<9> of the shaft c<7> engages and rotates the type-wheel. By turning the strip d<6> on the rod d, the arm d<8> is moved to one side, and the type-wheel may be removed.