DE63630C - Device for counting up and down for digits on numbering machines - Google Patents

Description

IMPERIAL

PATENT OFFICE.

The invention relates to a device on digit works of numbering machines to which Purposes of being able to count both forwards and backwards with one and the same number system

In order to number the pages of a book, for example, up to now one had to either use the Leaves first all on the front, then, starting all over again, on the back print; the latter is due to the fact that the pages are always put on and put down again the pressure block is a very annoying and time-consuming job.

Or you first had to skip all front pages with one number each, i.e. the Print pages 1, 3, 5, 7, 9 and so on to the end, then use another number Use down counting and start from the last page number, e.g. B. from 500, skipping Number the reverse sides of the sheets each with a number, i.e. print 500, 498, 496, 494 and so on. The new device needs on the other hand, only one switchover to be carried out instantaneously in order to use the same To be able to number alternately forwards or backwards.

In the drawing, a numerical mechanism equipped with the new device is shown in FIG. 1 in shown in the side view.

A is the frame of the dial , B are the dials that can be rotated around the axis C , D is the shift lever operated by the machine and loosely rotatable on the axis C, E is the ratchet wheel firmly connected to the first dial B , F is attached to the shift lever Switching pawl, which can be lifted out of the ratchet E by an eccentric G , as shown in FIG. 1.

All of these parts are the well-known devices on numerical works for counting in one direction (either only forwards or only backwards).

In order to be able to switch the number wheels of the same number system forwards and backwards, a second indexing wheel H is firmly connected to the first numbering disk B , the toothing of which is opposite to that of the indexing wheel E. In this second ratchet a second pawl / which swings around a pivot j of a lever J (Fig. 2), which has its pivot and support point on the pivot j ¹ , which is provided with a spiral spring j ² , which the endeavor has to move the lever J so that the pawl / comes out of engagement with the ratchet wheel H. This spring β can also be replaced by a spring fastened under the lever J.

A lever K can be loosely rotated on the axis C, which is coupled to the shift lever D and acts against a friction roller j ^{B of} the lever J in order to actuate the shift lever J with the pawl / to advance the indexing wheel H and the numerals. The pawl / can be disengaged by a resilient latch i engaging in a notch (Fig. 2), in which case, when the pawl F is engaged in the ratchet wheel E at the same time (Fig. 3), the dials are only switched forward.

If, however, the pawl / with triggering of the latch i in the ratchet H

engaged and at the same time the pawl F lifted out of the ratchet wheel E by the eccentric G (Fig. i), the switching of the dials B takes place with each stroke of the shift lever D in the opposite direction, backwards, it is counted down instead of forwards.

The attachment of two oppositely directed ratchet wheels and ratchets alone however, it is not sufficient to switch from one dial to the other in both To effect directions, this is rather a change of the transport device between the individual dials necessary.

In Fig. 4 and 5, the two opposing surfaces of two dials B are shown. In the recessed part of the disc, FIG. 5, there is a lever M movable about a pivot τη ^Λ , one end of which is pressed by a spring L against the edge of the disc. In the case of the previously used, only counting in one direction. Works this lever ends at m and hits as soon as the stop plate JV inserted on the pin η in the frame A hits the projection m ^{2 of} the lever M and depresses this lever arm, with the projection m against the end of the on the counter disc B, Fig . 4, fastened lugs O, whereby this counter-disk (which is to be indexed) is pushed further ..

In order to be able to use the same lever M in cooperation with the same stop plate JV when counting backwards to advance the following dial, a stepped extension Ai ¹ with a pin or pin w ^{8 is} molded onto the lever M and the lugs O of the counter disc have at one end the cutouts 0. The plate JV hits when counting down, as shown in Fig. 5, against the projection m ^{2 of} the lever M (when counting up, it hits against this projection from the other or inside) and lifts the approach M ¹ with pin m ³ into the recess 0 of the catch O of the counter-disk, so that the latter is pulled along and switched on. At the one lugs O ¹ above, into the recess 0 opening out Nuth o ^1, which cuts through the lugs and m ³ grants the pin without resistance passage, has, to enable the end, the position of the disk to "half tour" in order, starting from 1 without being able to print a leading zero.

Claims (2)

Patent Claims: 1. A device for counting up and down for numerals on numbering machines, in which, in addition to the switching mechanisms required for counting up, there is a second one for counting down and is characterized in that the pawl, which is hinged to the angle lever J and can be locked on this for disengagement / engages in the ratchet wheel (H) and this together with the number disks connected to it moves backwards as soon as N the thumb (K ) attached to the shift lever (D) moves the lever (J) '. 2. In connection with the device identified under 1., the indexing of the number disks among each other in that the lever (M) used for counting up has an extension (M ¹ ) with pin (m ³ ) and the lugs (O) of the counter disk cut-outs ( o) received, in which the pin (m ^s ) engages as required and thereby takes the next following dial with it. 1 sheet of drawings.