US2301936A - Printing calculating machine - Google Patents

Description

1942- H. K. F. EWALD 2,30

PRINTING CALCULAT ING MACHINE Original Filed Sept. 5, 1935 3 Sheets-Sheet 1 IIIIIHIMI' 11W] Iwf14 I ll 1\ l PM I 7 53 @[Wverzlorg 38 35 36 E EWZ I 8 2 A larfieys Nov. 17, 1942. H. K. F. EWALD 2,301,936

PRINTING CALCULATING MACHINE Original Filed Sept. 3, 1935 3 Sheets-Sheet 2 60 54 I /K/T EWEZd Inventor:

Nov. 17, 1942. EwALD 2,301,936

PRINTING CALCULAT ING MACHINE Original Filed Sept. 3, 1935 3 Sheets-Shet 3 Fig. 7

Patented Nov. 17, 1942 PRINTING OAIDULA'HNG MACHINE Heinrich Konrad Friedrich EwaliL Ohemnitz,

Germany; vested in the Alien Property Custodian Original application September 3, 1935, Serial No.

39,065. Divided and this application September 23, 1940, Serial No. 357,987. In Germany September 7, 1934 I Olaims. (Cl. 1971'l'l) This invention relates to bookkeeping and like printing calculating machines and more particularly to mechanism therein for arresting the paper carriage in desired column positions comprising settable stops on the paper carriage cooperating with a frame stop which is brought out of operative position at the end of each machine operation against the action of a spring holding said frame stop in operative position, and a pawl for locking the frame stop in its inoperative position.

The primary object of the invention is to improve. mech'anism of this kind in such a manner that it is possible to print amounts registered in the balance accumulator of the machine separately in diflerent paper carriage positions dependent on whether said amounts are positive or negative balances, and if desired to segregate these amounts simultaneouslyin different accumulators corresponding to their positive or negative character.

According to the present invention this result is achieved by making the pawl which looks the frame stop retractable by means of two diflerent control members which are settable on the paper carriage and assigned to different carriage positions, the control member assigned to a position first reached by the paper carriage being operative or not in dependence on the sign of the amount indicated by the balance accumulator.

A constructional example of the mechanism according to the invention is illustrated in the accompanying drawings in which:

Figure 1 is a sectional view of a machine equipped with mechanism according to the invention,

Figs. 2 and 3 show details of the mechanism in different working positions,

Fig, 4 shows means for controlling the frame stop for arresting the paper carriage,

Fig. 5 is a plan view of the shaft carrying the frame stop.

Fig. 6 shows a detail of Fig. 1,

Fig. '1 shows a device for tensioning the paper carriage spring, and

Fig. 8 is a section on line 0-4 of Fig. ,7.

The machine illustrated has an under frame I in which the paper carriage is slidably mounted in guides 3, I. The paper carriage 2 is moved in the working direction by a tension spring not illustrated, which is attached to a flexible cord ll, Figs. 7 and 8. The flexible cord II is secured to the paper carriage 2 by means of a clip ll is arranged on an extension of a frame plate ll, not shown.

To tension the carriage spring there is provided another flexible cord I2 one end of which is attached to a cord pulley 13. The other end of the flexible cord I2 may be connected to the shaft of a motor which also drives the machine. A gear I4 is fast on the cord pulley I3, which gear I4 engages a rack ii on the paper carriage. when the motor is started its shaft drives the flexible cord I2, rotates. the pulley II and gear I4, and thereby the paper carriage 2 is returned to its initial position and the carriage spring retensioned.

The paper carriage 2 has a base plate with a recess therein in which is mounted a frame 6. The frame 0 has side members extending in the longitudinal direction of the paper carriage and having slots therein for the reception of bars I which carry control members 8 serving to control the several functions of the machine. Said bars I also serve as carriage stops for arresting thepaper carriage 2. The bars 1 cooperate with a frame stop 0 which is fixed on a shaft It totatabiy mounted in bearings I! on the plate II. A spring I3 urges the shaft it constantly in clockwise direction, Figs. 1 to 4, whereby the frame stop I tends to assume the position shown in Figs. 1, 4 and 5 in which it cooperates with the bars I when the paper carriage 2 is drawn in its working direction, for example, by the carriage spring. When the paper carriage 2 is moved in the opposite direction, an oblique surface on the frame stop I comes into contact with the bars I. In this movement of the paper carriage, therefore, each bar I causes a counter-clockwise rotation of the shaft II as it moves past the frame stop I. Immediately after passing a bar I the shaft II and frame stop 9 are restored to initial or locking position. The locking position of the frame stop t is determined in the mechanism illustrated by means of a'locking member it which can rest against an abutment I5 on the plate I l. Accordingto Fig. 5, the abutment II is resilient. In order that the paper carriage I may not make too violent impact against the frame stop 9, the

thereon. The casing-of the paper carriage spring 5 preferably resilient and may be provided with a and to allow the paper carriage 2 to move under the influence of the carriage spring into the: next column position. For this purpose the following means are provided, see Fig. 4. The shaft ll of the'frame stop 9 has a toothed sector I. at-

tached thereto engaging corresponding teeth on a disk l9 which-is rotatably mounted on a shaft 22 and carries a roller 2| operating as a crank pin. When the shaft I! is rotated in clockwise direction the shaft II is rotated counterclockwise and the frame stop I retracted.

A shaft 22 is connected through link means II, it and 81 to the main shaft I of the machine, Fig. 4, on which shaft 22 is mounted a disk 23 to which an operating member 20 is'slidably connected by means of a pin and slot Joint 24, 25, which operating member 20 is acted upon by a tension spring 21. The main shaft ll can be oscillated manually or by an electric motor not shown. At each machine operation theshaft 22 receives an oscillating movement in the first part of which the shaft 22 rocks in clockwise direction. In this rocking movement of the shaft 22 the-operating member 2. slides along the roller 2i of the disk I! and finally away therefrom, so

that it can move to the right relatively to the disk 23, under the action-of the spring 21. vWhen the shaft 22 performs its return stroke in the second part of the machine operation, the operating member 26 engages below the roller 2| and efl'ects a clockwise rotation of the disk I l and resulting retraction of the frame stop 8. During to the lower arm of which -a-link 24 is jointed. The other end of this link 84 is jointed to a lever 28 pivoted at a and acted upon by a tension spring 42 urging it always in anti-clockwise direction. The upper arm of the lever 35 is jointed at 3'! to a locking lever it acted upon by a spring 38, which lever it bears against a fixed pin 40. The end of the upper arm of the'lever II has a shouldered notch ll cooperating with a pin 42 arranged on a lever 44 fixed to the shaft It and this pin serves as a pivot for a locking pawl (l which is connected by a tension spring ll with the upper arm of the lever 25. The lever I. is acted upon by a spring II. The end of the spring 48 isattached to the lever by means of a pin 41 which also acts as a stop for the movement of the pawl 48. In its working pomtion the pawl ll engages behind a square pin 48 on the locking lever ll. see Figs. 2 and 3.

go The pawl Ill carries a pin ll operating as a crank pin and cooperating with a lever ll pivoted on a fixed pin ll. lever II is connected by a link 52 with a lever ll pivoted at and which can be actuated by means of a control member 25 2 on the bar of the paper carriage 2. The shaft 3| ca yin the pawl also has mounted thereon a crank it with a crank pin it cooperating with a link 51 jointed to a bell-crank 52 mounted on a fixed pivot. The bell crank 58 is connected so by a link 52 with alever I also pivoted at 54 and which can be actuated by a control member I on the paper carriage 2. The jointing of the link 51 to the bell-crank i8 is such that the free end of the link 51 can move to and fro by a as small amount in a plane at right angles to the plane of the paper in Fig. l, the amount of movement being longer than the length of the pin it of the crank 55. By rocking the-link 51 it is therefore possible to bring a recess It in the upward movement of the roller 2i under/the the link into or out of engagement with the pin action of the operating member 2|, the roller, after the frame stop 8 has been sufllciently retracted, moves away from the upper surface of the operating. member 20. This releases the spring l3, causing the shaft ll again to rock in clockwise direction and restore the frame stop 9 to its working position before the next bar I comes into its range of action. Since the disk it engages the toothed sector ll and the shaft ii, the disk I. is also returned by the spring ii to theposition shown in Fig. 4, and thereby the roller 2i presses the operating member back to its initial position against the action of spring 21.

In order to prevent return movement of the frame stop 0 at the end of a machine operation, there is provided a crank 22, the pin 28 of which can be brought to bear against the operating member 26 in such a manner that movement of the latter by the spring 21 cannot take place. When the crank 20 is brought into the position shown in Fig. 4, there is consequently no forcing back of the frame stop 8 and the paper carriage will not effect a movement at the end of the machine operation, but will remain in its previous position. 7

The locking member ll on the shaft ll cooperates with a pawl 20 flxed on a shaft II, the arrangement being such that the pawl 20 will drop into its worki position behind the looking member I raised during the retraction of the frame stop I, and willthus prevent restoration of the frame stop 0 to its locking position under the action of the spring It. The pawl ll may be brought into operative position by a key 32 the stem of which acts on a bell-crank ll 7 It. The rocking of the link I! is eifected by the lever I mounted on the shaft l2 which can be rotated, through connections not shown, either by hand or automatically in dependence upon a change of sign in the amolmt indicated by the balance accumulator. To actuate the shaft 62 in accordance withchange of sign of the balance accumulator contents, there may be used the means shown, for example, in U 8. Patent No.

1,046,552, which patent describes a machine empioying mechanism for actuating an indicator of the sign of the accumulator content.

The control members l are so arranged on the paper carriage that the control member I acting 55 upon lever CI is operative in thepaper carriage position reached by the carriage prior to the position in which the second control member 8 acts upon the lever 52.

The mode of operation of the described mecheo anism is as follows:

In normal operation of the printing calculating machine, in each machine operation the disk 23 is rocked causing the shaft 22 carrying the operating member 26 to effect an oscillating 65 movement of the disk It and consequently a retraction of the frame stop 8 whereby the bar I previously held by the frame stop 9 is released and the paper carriage 2 caused to efl'ect ,a movement until the frame stop, under the action of the spring i3, becomes operative to engage a,so1,aas 3 II is rotated clockwise about pivot 16 and its shouldered recess ll releases the pin 42 of lever u. The lever 44 then moves clockwise under the pull of spring 83 and brings the pawl 30 mounted on the same shaft 3| into engagement with the locking member ll fixed on the shaft ll of the frame stop 9, see Fig. 2. Simultaneously the locking pawl 45 is released by the pin 41. During the movement of the lever 44 the locking pawl therefore moves downwards and engages behind the square pin 48 of the locking lever u. The lever ll, during the rocking of the lever 85, slides to the right of the fixed pin ll and snaps behind the same, see Fig. 2, thus locking the parts shifted by the key 32, in their new position. Fig. 2 shows the positions of the parts under depression of ke 32.

n the ensuing machine operation, the frame stop I is retracted in the manner above described, in the'course of which the rocking member ll fixed on the shaft II, also effects a rocking movement and forces the pawl 3| backwards against spring 88 until the pawl II can snap behind the rocking member I. see Fig. 3. The pawl il in this position prevents the frame stop I from returning to operative position under action of the spring ll. Consequently the paper carriage 2 moves under the action of this spring until the frame stop I, by return movement of the pawl II, is capable of again becoming operative to stop the paper carriage 2 at the next bar I.

In the course of the paper carriage movement the control member G on the bar I actuates the lever ll and draws the link I to the right, Fig. 1. If the contents of the balance accumulator has a certain sign. for example positive, the link I! has its recess N in engagement with the pin ll of crank ll, whereby upon actuation of the link I] the pawl 3| is rocked out of its locking position. Under the action of the spring I! the frame stop I would then assume its operative position and would arrest the carriage 2. If, however. the contents of the balance accumulator does not have the determined sign. for example if it is negative, then the link II is operated by the lever II on the shaft 02 in such a manner that its recess 4 is out of engagement with the pin I. of crank 55. Actuation of the link II thus does not affect the pawl 80 in its locking position and the paper carriage 2 continues its travel notwithstanding the operation of the link II.

On further movement of the paper carriage the second. control member I acts upon the lever II and operates the lever 5| through the link ll. This lever presses against the pin ll on the pawl II and thereby rocks the pawl against the action of spring 83 out of its locking position. 'Ihis releases the locking member ll whereby the frame stop I moves into position under the action of spring II to arrest the paper carriage.

On return of the pawl II into the position shown in Pig. 1 the lever 44 rocks upwardly. The square pin 48 of the pawl 43 then raises the locking lever 38 so that it is carried above the fixed pin ll. Since the notch in the locking lever ii is no longer operative, the lever 38 is returned under the action of spring 43 into the position shown in Fig. 1.

In consequence the shouldered notch ll of the lever 38 again liesbelow the pin 42, and the locking pawl ll is forced back by the pin 41 and released from the square pin it of the locking lever u. At the end of the described operation all the parts of the mechanism are back in the position shown in Fig. 1.

The mechanism according to this invention makes it possible to cause the paper carriage of a printing calculating machine, by merely pressing the key, to Jump through any desired number of column positions and to stop in one or the other of two predetermined carriage positions, in dependence upon the character, positive or negative, of the amount registered in the accumu-.-

lator.

The present application is a division of my co-pending application Serial No. 39,065, filed September 3, 1935, now Patent No, 2,258,090, issued October 7, 1941.

I claim as my invention: 1. In a bookkeeping machine the combinatio of a machine frame, a paper carriage slidably arranged on the machine frame, means for moving the paper carriage in its normal direction, stop members arranged on the paper carriage, a stop shiftably arranged on the machine frame for cooperating with the stop members to stop the paper carriage in any column position, yielding means for holding the stop in its operative position, an oscillating main shaft, actuating means connected with the main shaft for bringing the stop during the last period of each oscillating movement of the main shaft to an inoperative position, a latch for lockin the stop in its inoperative position, two means independent of each other for bringing the latch to its non-locking position, a member settable into two different positions, two control members arranged on the paper carriage in different column positions, each of the control members coacting with one of the said two means, and coupling means between the latch and that one of the two means which coacts with the control member which is arranged in the first of said column positions, said coupling means being connected with the settable member for being made effective or ineffective in dependence on the position of the settable member. i

2. In a bookkeeping machine the combination of a machine frame, a paper carriage slidably arranged on the machine frame, means for moving the paper carriage in its normal direction, stop members arranged on the paper carriage, a stop shiftably arranged on the machine frame for cooperating with the stop members to stop the paper carriage in any column position, yielding means for holding the stop in its operative position, an oscillating main shaft, actuating means connected with the main shaft for bringing the stop during the last period of each oscillating movement of the main shaft to its inoperative position, a latch for locking the stop in its inoperative position, a spring for bringing the latch to its locking position, a crank connected with the latch, two settable means, a member settable to two different positions, a, rod for bringing the latch into its non-locking position, the rod being connected on the one end with the one of the two settable means and guided on the other end by the said settable member and being connected with or disengaged from the crank in dependence upon the podtion of the settable member, a lever connected with the other of the two settable means for bringing the latch into its non-locking position, controllable means for holding the latch in its non-locking position against the action of the spring, and two control members arranged on the P p r carriage in different column positions, each of the control members acting upon one of the said two settable me member, which acts upon the setta e means connected with the rod, being arranged on the paper carriage in the first of said column positiona 3. In a bookkeeping machine the combination of a machine frame, a paper carriage slidlably ative position, a latch for locking the stop in its inoperative position, a spring 'for'bringing the latch to its locking position, a crank connected with the latch, two settable means, a member settable to two different positions, a rod for bringing the latch into its non-locking position,

aeoaaso that control column positions, and a key for setting the controllable means to their ineffective position.

4. In a bookkeeping machine the combination of a machine frame, a paper carriage slidably arranged on the machine frame, means for moving the paper carriage in its normal direction, stop members arranged on the paper carriage, a stop shlftably arranged on the machine frame for cooperating with the stop members to stop the paper carriage in any column position, an oscillating main shaft, actuating means connected with the main shaft for bringing the stop during the last period of each oscillating movement of the main shaft to an inoperative position, a latch for locking the stop in its inoperative position, a spring for bringing the latch to its locking position, a crank connected with the latch, two settable means, a member settable to two different positions, a rod for bringing the latch into its non-locking position, the rod being connected on the one end with the one of the the rod being connected on the one end with the one of the two settable means and guided on the other end by the said settable member and being connected with or disengaged from the crank in dependence upon the position of the settable member. a lever connected with the other of the two settable means for bringing the latch into its non-locking position, controllable means for holding the latch in its non-locking position against the action of the spring, two control members arranged on the paper carriage in different column positions, each of the. control members acting upon one of the said two settable means, that control member which acts upon the settable means connected with the rod being arranged on the paper carriage in the first of said two settable means and guided on the other end by the said settable member and being connected with or disengaged from the crank in dependence upon the position of the settable member, a lever connected with the other of the two settable means for bringing the latch into its nonlocking position, controllable means for holding the latch in its non-locking position against the action of the spring, and two control members arranged on the paper carriage in different column positions, each of the control members acting upon one of the said two settable means, that control member, which acts upon the settable means connected with the rod, being arranged on the paper carriage in the first of said column positions.

HEINRICH KONRAD FRIEDRICH EWALD.'

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