US1594436A - Line-spacing mechanism for typewriting machines - Google Patents

Description

Aug. 3 1926.

A. R. G. VOGT LINE SPAGING MECHANISM FOR TYPEWRITING MACHINES Filed Nov. 14, 1924 2 Sheets-Shoot 1 Aug. 3 1926. 1,594,436

A. R. G. VOGT LINE SPACING MECHANISM FOR TYPEWRITING MACHINES Filed Nov. 14. 1924 2 Sluts-Sheet 2 Patented Aug. 3, 1926.

UNITED STATES 1,594,436 PATENT OFFICE.

ALFRED RICHARD GEORG VOGT, OF CHEMNITZ, GERMANY, ASSIGNOB TO WANDERER WERKE, FORMERLY WINKLHOFER AND GERMANY.

JAENICKE' A. G., OF SCHOENAU, CHEMNITZ,

LINE-SPACING MECHANISM FOR TYPEWIRITIN G MACHINES.

Application filed November 14, 1924, Serial No This invention relates to line-spacing mechanism for typewriting and similar machines and its object is to obtain an intermediate line spacing without employing more than one feed ratchet, one detent pawl and one feed roller.

In the case of the devices hitherto known an intermediate line-spacing has usuall been effected by employing a plurality 0 feed ratchets having teeth of different pitch, and displacing the platen cylinder with the feed ratchets in their axial irection.

All these line-spacin devices are costly in their construction an give rise to many kinds of inaccuracies in use.

In order to remove these disadvantages, according to the invention, the line-space adjustin shaft is constructed in a new way.

Wh1le retaining an adjusting device of known construction, the line-spacing adjusting shaft is arranged so as to be capable of being turned to different angular positions for the normal line spacinig widths and of being longitudinally disp aced for intermediate line spacings for varying the movement of the ratchet wheel, one or more separate locking devices being provided for retaining the shaft in the set angular and longitudinal positions, respectively. The smallest line distance here amounts to a multiple of the number of teeth of the linespace ratchet wheel. Furthermore all the feed widths are effected by means of a single detent roller.

One constructional example of the invention is illustrated in the accompanying drawing, wherein Figure 1 is a side elevation of the device in the position of rest, adjusted for normal feed widths of one, two and three line spaces.

Figure 2 is a plan of the device shown in Figure 1.

Figure 3 is a side elevation of the device in the position of rest, adjusted for intermediate feeds.

Figure 4 is a side elevation of the device after effecting a two-line spacing movement. Figure 5 shows the same device after effecting a 2% line spacing movement.

Figures 6 to 8 illustrate details.

The platen journal 1, with platen-freerun 2 and line-spacing ratchet wheel 3, rests in the bearing plate 4;. The feed slide 5, which is guided on the pins 6 on the plate 4;

annular groove 18 is 749,865, and in Germany November 16, 1923.

against the line-spacing ratchet wheel by a torsion s ring connected at 8.

The ang e iron 10 is secured b a screw 11 to the feed slide 5 and has fixe to it the guiding pm for the compression spring 13. The pin 1s guided at the other end in a hole in the bolt 12.

A small bracket 14 secured to the bearing plate 4 receives the line-space adjusting shaft 15, WlllCll is provided with a stop pins 16, and also a handle 17. The shaft 15 which is capable of turning and sliding in the bracket 14:, is retained in the set angular position in a known manner b the spring-pressed ball 26 (Figure 8) which drops into correspondlng rests or notches 15. In order to hold the adjusting shaftfast in its retracted position for feeding the normal distances, an rovided, into whicn drops the lever 19, which is pivoted on the pin 26 passed through the bracket 14 and 1s sub ected to the pressure of the spring 19. The detent lever 24 rotates about the bolt 25 and carries the arrestin roller 26, which rotates on the pin 27 The lever 24: is pressed on to the'line-spacing wheel 3 b the torsion spring 28, one end of which a uts against the pin 29 on the plate 4 whilethe other end abuts against an offset ortion 241 of the lever 24. The detent rol er disengaging lever 30 is pivoted on a rivet 31 on the bearing plate 4.

The method of operation of the improved line-spacing mechanism is as follows:

The control of the feeding and also the adjustment of the line distance is effected in the manner hitherto known. In the feeding of normal distances, that is, of one, two or three lines, the line-space adjusting shaft 15 is drawn to the left right up to its limiting engage the teeth of the ratchet wheel 3 until arrested by the stop pin 16 after the ratchet wheel has rotated through an angle corresponding to a single line s ace. Similarly by turning the shaft 15 unt1 the middle pin 16 lies in the path of the pawl 71, which allows the slide to travel further before being arrested, a two line space is obtained and when the extreme right-hand stop is placed into the path of the pawl a three line space is obtained. The pawl 7 travels towards and away from the ratchet Wheel in a horizontal direction, riding over the teeth of the latter during its return movement.

For intermediate line spa-:e feeds the arresting lever 19 must be lifted up, thereby releasing the adjusting shaft so as to enable it to shift one division towards the right. When the shaft 15 is in this position, it is retained in set an ular position in a known manner by the spring-pressed ball 23, which lodges in the notches of the adjusting shaft 15. The small single space feed is in the case of this device equal to a dis lacement of two teeth of the line-space rate et wheel 3. In the case of a double space feed the said distance corresponds to a displacement of three teeth correspondingly in the case of the other normal feeds always one tooth more.

As the ratchet wheel is only rotated by whole distances between the teeth, only one detent roller is necessary. Furthermore the platen may be rotated at will by hand, and

will nevertheless yield the desired line space at any time, even when feeding the first line.

In conclusion it may be'observed that instead of the division of the feed wheel described and the shifting of the stop pin, the division may even be a smaller one, and the shifting of the adjusting shaft an even more extensive one.

What I claim is 2-- Line spacing mechanism for typewriting machints, comprising in combination a line spacing ratchet Wheel having the distance between two adjacent teeth corresponding to a sub-multiple of one line space, a spacing pawl adapted to engage the teeth of said ratchet wheel, means for advancing said pawl to engage the teeth of the ratchet wheel and rotate it, an adjusting shaft having means for regulating the line-spacing movement ofthe pawl, said shaft being capable of adjustment to different angular positions for the normal line spacing movements of the pawl and of longitudinal displacement for varying the movement of the ratchet' wheel by one or more teeth, means for looking the adjusting shaft in the set angular position and means for locking the shaft in the set longitudinal position for the purpose set forth.

In testimony whereof I have signed my name to this specification.

ALFRED RICHARD GEORG VOGT.

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