US2266182A - Calculating machine - Google Patents

Description

Dec- 16, 1941 H. K. F. EWALD ETAL 2,266,182

` CALCULATING MACHINE Filed Aug. 23, 1938 3 Sheets-Sheet l A@ 1 Wawaa rf y r1 Dec. 16, 1941.

CALGULATING MACHINE Filed Aug. 23, 1938Y 3 Sheets-Sheet 2 H. F. EWALD ETAL 2,266,182

Dec. 16,'1941. H. K. F. EwALD ETAL CALCULATING MACHINE Filed Aug. 23, 1938 3 Sheets-'Sheet 3 J J s c m m 0 l Zd H 2dr www@ Ewf MFEQM if@ HGM., 5%

Patented Dec. 16, 1941 CALCULATING MACHINE Heinrich Konrad Friedrich Ewald, Chemnitz,

Friedrich Gustav Hugo Eggers, Siegmar-Schonau, and Ernst Max Tndler, Chemnitz, Germany, assignor to Wanderer-Werke' Aktiengesellschait, Siegmar-Schonau, Germany Application August 23, 1938, Serial No. 226,370 In Germany August 26, 1937 (Cl. 23S-130) 2 Claims.

This-invention relates to printing calculating machines and has for its object a safety device for preventing unauthorized interference or meddling with the machines a'nd more particularly every unauthorized use or disarrangement of the machine by any unauthorized person and against an unauthorized change of the setting by the operator. It is therefore an object of this invention to provide a lock mechanism to lock the frame carrying control members to prevent an unauthorized setting or changing of the machine.

In accordance with the invention a lock is provided for this purposethe closing of which shuts off or arrests all the means which are actuated by the digit keys and sign keys as well as arresting the transversely slidable carriage. The arresting may be limited thereto that the said means, that is the calculating and printing mechanisms of the machine cannot be actuated, but that the keys themselves may be pressed down without however having any influenceon the other elementsl otherwise actuated thereby, and said keys automatically returning to their position of rest.

It is furthermore advantageous, when driving the machine by an electric motor, to provide a special switch for the motor in the feed circuit, which switch is opened by closing the lock in accordance with the present invention. Although the motor generally is not switched on but in the case calculating and printing mechanisms are broug'ht into action, it may however be desired to switch it oi independently thereof in order to prevent the motor from being started, by unauthorized interference of any kind. y

Furthermore, a latch or arrester is suitably provided for the keys of the total taking mechanism or for the elements actuated thereby and preferably by means of a special lock therefor, whereby there will be presented the possibility of preventing the operator to take totals.

Finally in order to prevent any unauthorized change in the setting of the paper carriage control of the machine either by the operator or any other person, a machine having a rider, such as for instance a frame carrying control tappets and being securedfon the paper carriage, may be provided with a latch for locking the means which secure the frame on the paper carriage,

chine. In accordance with this invention any release of the frame carrying the control tappets for changing the adjustment of the tappets is therefore prevented when the machine is locked, because the carriage is arrested, that is, it cannot be brought into that end position wherein the carrying frame can be released for changing the position of any tappets. But even during the working of the machine, any such change of the tappet positions can be prevented, when there is a possibility of release of the carrying frame in the carriage end position by operating the said latch by means of a special key-operated lock provided therefor.

Of the last named devices, that is the locking latch for the keys of the total taking mechanism and that for the arresting of the carrying frame,

lmay also be arranged the one alone.

The drawings illustrate diagrammatcally the invention and show in Fig. 1 a calculating machine in plan view partly in section.

Fig. 2 a side view in the direction of the arrow A of Fig. 1 and partly in section,

Fig. 3 a side view in the direction of the arrow B of Fig. 1 and partly in section,

Fig. 4 a side view also in the direction of arrow B of Fig. 1 partly in section along line IV of said figure, and

Fig. 5 a section taken on line V-V of Fig. 1.

Upon the main frame or casing I of the calculating machine there is arranged on one side a lock 2, Fig. 1, the crank-like member 3 of which carries a pivot pin 4, Fig. '4, upon which the rod 5 is pivoted and which also engages the slide 6 horizontally movable in a long slot provided in the stand I. The member 3 is fastened to the shaft 2 of the lock 2. The rotation of the member 3 in both directions is limited by a pin 3 which is provided on the machine frame I; The other end of the rod 5 as shown in Fig. 4 grips the pin 1 of the lever 8, which latter is mounted on the shaft 9 mounted in bearings in the main frame I. This shaft also carries a second lever I0 connected with the rocker I3 turning on a pivot I2 in the main frame I, by means of the rod II which is parallel to the key surfaces. Motor keys I5, each provided with a side nose Il, are arranged in the casing I. On pins I6 are suspended the latches I1, which together with the rocker I3 form an arresting chain between the members of which, at any one time only a single one of the noses I4 can be situated, so that also only one of the motor keys I5 can be depressed in coupling position.

In the casing I at the side ofthe shaft 9 a shaft I8 is revolubly mounted. A lever I9 is mounted on shaft I8 and having a pin 20 engagingin a longitudinal slot in the rod 2I which is linked to the pin I of the lever 8.

On shaft I8 are provided levers 22, one for each o rder f the amount keys 23 and for the row of sign keys 24.` In each lever 22 there is a slot in which the pin 25 engages. There is a pin 25 on each releasing rail 26, which latter is arranged slidably under the key surfaces in the main frame I and which is actuated by a spring 21. Each rail 26 possesses a plurality of hooked noses 23, for holding down the keys 23 and 26 which are depressed against the force of the springs 26.

A lever 36 on shaft I8 is provided at right angle to the levers 22 and this lever 36 is provided with a longitudinal slot, into which the pin 32 projects which is fastened on the releasing key 3l. The shaft i6 also carries the lever 33 as shown in Fig. 2 which lever can be rotated in clockwise direction for locking the arm 36, this arm being pivoted on pin 35 in the casing I at a distance below the total key 36 for taking the totals from the accumulatore. The arm 3d may also be locked by the rotatable member 3'iof a lock 38, this lock being positioned on the side wall of the casing I.

The slide 6 engages a lever 36 which is rotatably mounted on the bottom of casing I, and the other end of the lever is engaged by the rod 6@ which transfers its movement to the vertically slidable shaft 42 through the intermediary of a bell crank lli as shown in Fig. 3. The shaft or rod i2- acts from below on the lever member 66, which is under inuence of the tension spring d3, Fig. 5, and one arm of which carries internal teeth situated opposite the gear wheel d5 for driving the carriage.

To the slide 6 there is also linked the push rod 46 which acts with its stud di of insulating material on the control spring @8 pushing against the contact 69.l This contact breaker formed by these two contacting members may serve for disconnecting the feed current for the driving motor of the machine.

In the carriage 5I, Fig. 5, is mounted on bearing points or pins 52, 53 a box-like frame 56, which may serve for reception oi members for controlling the paper carriage column positions and various functions of the machine. Such members are for instance shown in French 63, while tensioning the spring 65, is turned by the lug 66 arranged in the main frame I, thus setting the lever 58 free, so that the tooth059 can be disengaged from the gear Wheel 56 by operating the lock 62. The bearing point 53 may now be screwed out far enough to permit the removal of the frame 5U from the carriage.

If after the use of the machine the lock 2 is operated, then the member 3 turns upwards counter-clockwise from the working position of the machine shown in Figs. 3 and 4. It then pushes the slide 6 towards the right, so that the contact spring 48 is lifted from the corresponding contact 49 thereby breaking the motor circuit. By the displacement of the slide 6 the lever 36 is turned and the rod 40 drawn forwardly in the machine whereby the shaft 42 drops by its own weight. 'Ihe lever member 44 can now be turned by the spring 43 thereby placing its toothed arc in mesh with the gear wheel 45 thus arresting the same, so that consequently no movement of the carriage is possible. Furthermore, the member 3 has also displaced the rods Patent No. '795,028 and in the corresponding U. S. application Serial No. 39,065, filed September 3, 1935. This patent shows control tappets and control members inv a frame which is .re'

movably secured on the paper carriage as shown in Figs. 14 to 16. The bearing point 53 is threaded into. the carriage andcan accordingly be axially adjusted by means ofthe hand wheel 54. Unscrewing the pin will permit the lifting out of the frame 50 from the carriage 5I for example for changing the positions of control members. Upon the bearing pin 53 there is secured the gear wheel 56 under the .hood or casing 55. Within the hood a two armed lever 58 is mounted to turn on the pivot 51, said lever 58 carrying a tooth 59 opposite the gear wheel 56 and is bifurcated at its4 end, Fig. 2. The crank-like member 66 engages the bifurcated arm of the lever 58 by means of a pin 6I, said member being part of the lock 62A provided on the casing 55. I'he other end of the lever 53 is arrested by the angular latch 63 pivoted on the pin 64 inthe carriage 5l. When the carriage 5I arrives in its right hand end position, then the angular latch or links 5 and 2l, Fig. 4, and thereby rotated the shafts 9 and I3 counter-clockwise. The shaft 9 thus'drives the rod II forward in the machine and has also turned the rocker I3 on its pivot,

whereby the latter becomes pressed against the arresting latch Il, so that the row of arresters or latchesis now closed and thus no motor key can be depressed. By shaft I 8 the rails 26 are also moved forward in the machine through the intermediary of lever 22, Fig. 3. Should then one of the amount keys 23 be touched, it cannot produce any displacement of the rail 26, but does also not engage below the corresponding hooked nose 29 of the rail 26, and will not accordingly be held depressed, but will instead immediately jump up, as soon as released. No positioning of the rails 6l is thus possible, their moving moreover being stopped on account of the non-rotation of the motor.

With the turning of the shaft I8 the lever 33 is turned clockwise upwards, Fig. 2, which shows the other side of the machine. Thus it will grip under the arm 34 and hold it stationary, so that the total key cannot be depressed any more.

After the use of the machine the carriage is generally placed in thev middle position. The angular latch 63, actuated by the spring 65, then lies in the path 'of the lever 58. The same cannot therefore be brought into the position to set the gear wheel 56 free by the opening the lock 62, so that any unscrewing of the bearing points 53 and consequent removal of the frame 50 is made impossible. The latter, can, therefore, only be taken out when theA lock isopen, but the lock can only be opened with the carriage in end position but on the contrary however, it can be closed with the can'iage inany'position.

Advantageously the construction of the lock 62 may be of such a kind that its key can only beV removed with the lock in closed position. -The operator of the machine-would be compelled to close the frame lock', if he wants to take away his key at the end of the operation. If he then also dutifully locks the main lock 2 of the mal chine, then every part of the latter is arrested in a number of ways and accordingly any unauthorized use is also actually prevented, even if the motor current cut out and furthermore the removal of the frame carrying the control members in made impossible in case the carriage does not stand in its right hand end position. Y

Even in the latter case any change of the adjustment of the control members is, however. only possible with the lock 02 unlocked. Also such change by the operator is therefore prevented when the key for the lock i2 is withheld from him. The same also applies to the total key 3i which has already been arrested by the closing of the main lock l, but which key itself may also be locked -by means of the lock 38. By means of the lock 3l the operator may also be pre, vented from taking totals, if only his superio will take the totals.

The releasing key 3| is not disturbed or moved by turning the shaft Il upon closing the lock 2, because its pin 32 is not carried along with the longitudinal slot of the lever 3l. When again the lock 2 isnpen the shaft Il can be turned'by tapping the releasing` key Il, without moving the rod 2|,forthe reason that the pin 2l of the lever Il can move freely in the long slot of the rod (Fig. 4). The releasing key can therefore during the use of the machine be used without hindrance and without having any iniiu .ce on the lock 2.

We claim as our invention:

1.*A calculating or like machine comprising a machine frame, a carriage slidably arranged on the machine frame. a box-like frame, means for securing the box-like frame on the carriage. an operable member for locking the securing means, a latch for' locking the said member in its locking position, a spring forcing the latch to its locking position, and an abutment provided on the machine frame for bringing the latch to an inoperative position in a certain column position of the carriage against the action of the spring.

2. A machine according to claim 1, in which a key-operable lock is provided for operating the locking member only when the latch has been brought to the inoperative position.

HEINRICH KONRAD FRIEDRICH EWALD. FRIEDRICH GqsTAv HUGO EGGERs. ERNST MAX TANDLER.

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