US1641297A - Typewriter - Google Patents

Description

Se t; 6, 1927. M. SHIMADA 1,641,297

TYPEWRITER Filed Feb. 5, 1925 five/1781." MRSA/Ma fa.

a the accompanying has 8 Patented Sept. 6, 1921.

UNITED STATES IINOKICHI 8H IMADA,'OF EBARA-GUN, TOKYO-FIT, JAPAN.

,TYPEWRITEB.

Application filed February a, 1925. Serial No. 6,654.

This invention relates to improvements in a type-lever mechanism of a typewriter, and has for its objects to provide a typewriter equipped with a plurality of sets of type 5 bars, either set 0 which can be operated with the same speed as astandard visible typewriter.

According to this invention, the typewriter consistsbriefly of a carria e, a plum ralit of sets of type-bars and a ey-board of t e character used. in. the present well -known machines. The parts are so constructed and arranged to effect typing by means of one key-board which is adapted to operate any one of a pluralityof sets of type-bars mounted in turn in a rotatable basket so that any one set of such type-bars may be brought into operating position. The basket is rotatable preferably by means of a handle for bringing the required set of type-bars into printlng or operating posit1on.

The invention has for its objects to effect typing of many Chinese characters with a degree of rapidity, and at the same'time, is made apphcable to a standard visible typewriter for the printing of letters of different styles, while the mechanism can operate any one set of type-bars with no less efiiciency than that of a standard typewriter.

Other objects, as well as the nature, characteristic features and scope'of the invention will be more readily apparent from the following description taken in connection with drawings and pointed out in the claims forming a part of this specification.

The invention is'clearly illustratedin the accompanying drawin in which Figure 1 is a centrafiectional view of the improved type bar arrangement applied to a standard typewriter.

Figure 2 1s a front view of the same, the

ypewriter being partially broken away to ow. the construction and'arrangement of page. 'nl digure 3 is an e ar erspective view of the type-bar support iiig asket.

Similar characters of reference are employed in all of the above described views to indicate corresponding parts. v

Referring now, more particularly to the 'aceom an each set of typebars i izifiuma wi thin a basket 2 mahaft (8) journall trans riedinturnona theframeof versely in the upper part of the typewriter as the type bars have to swing toward the printing-point (4) of the platen (5) as in a standard visible typewriter, each set of the type-bars is arranged,

around the type-bar supporting basket in a concave form (Fig. 2 and Fig. 3), being thereby well-balanced in weight to ensure of easy operation.

The basket supporting shaft (3), is mounted in the front and rear bearings, (6) and (7), of the frame (8), and is rotated by means of a handle (9) attached thereto. The handle (9) carries an indicator (10) to show the stop in oint of the basket and on the rear s1 e, 1t as a pin (11) which is adapted to be pushed by means of a spring into engagement with one of the holes As soon as the indicator (10) points to the stopping point of the basket or wheel, the pin (11) is sprung into one of the holes 13) on the frame (8), thereby securing the asket in the desired position of adjustment.

The type-bars, pivoted in the bearings (14) at one end, are supported when in operative position by (lfigeat the other end, but as these supporters turned downward, there are provided additional adjustable stops (16) on the shaft (3) to prevent them from alli'ng.

These steps are mounted to reciprocate on the shaft and are fitted with two rollers (17) and (18 and with a cam (19) become ineffective when the type-bars are.

the type-bar supporters tween them, t e cam being secured to the frame (8) with its up er portion reduced towards the frontof t e machine and its lower portion 1 projected toward the rear of the machine ig. 1). The rollers, (17 and 18 operate on these faces of the cam- 19 so that the stops are kept out of the at of movement of the operative type ers and are moved close to the inactive type bars. The cam therefore automatically sets the stops (16) in proper position re ardless 'of the" set of'type bars being use The stops have bent edges (20), which prevent the falling of the inactive type-bars.

As the projecting portions (21) of the type-bars are not directly connected to the levers (22) of the key-board, the type-bar basket can be freely rotated but when a key is presed down to move the lever in the direction of the dotted line, the bent terminal of the key lever (22) strikes the rojecting portion of the correspondingtypear,thereby lifting the type-bar toward the platen to eifect the printing ofthe character.

It is believed in view of the foregoing description that a further detailed description is entirely unnecessary. Likewise it is believed that the advantages of the invention will be readily apparent.

Having thus fully described the invention what is claimed and desired to be secured by Letters Patent is 1. In a typewriter of the visible type, a frame, a plurality of key levers, a shaft journalled transversely in the upper part of the frame, a type-basket carried on the shaft and including a plurality of sets of typebars each set of which is adapted to be arranged to coact with the key levers, a handle for rotating the shaft to consequently arrange the desired set of type bars in position, and cooperative catch and indicating means on the frame for releasably holding the type-basket in the desired posltion of adjustment.

2. An arrangement as claimed in claim 1, wherein the type-basket also includes supporters in the basket near the free ends of the type-bars for supporting the type-bars which are positioned in operative relation with the key levers, and adjustable stops mounted on the shaft and supporting the 5 inactive sets of type-bars which are not in use.

In testimony whereof I have aflixed my signature.

MINOKICI-II SHIMADA.

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