DE1163582B - Pre-zero suppression device for computer-controlled office machines - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Boarding school Class: G 06 b

German KL: 42 m-29

Number: 1 163 582

File number: L13687 IXc / 42 m

Filing date: October 24, 1952

Opened on: February 20, 1964

The invention relates to a leading zero suppression device for an electromagnetic through a full-key field calculating machine in decadic steps Controlled, record keeping office machine with a numeric contact pad on which the numerical values are set by sliding contacts connected to the slide bars.

So far, the suppression of the zero pressure in such a case took place in that the dem Numerical value »0« corresponding contact point of the numeric contact field either the actuating magnet for the space key or for the zero key. Whether the one or other of these magnets is to be excited, is determined by means of a changeover contact, which is from a relay is controlled, which responds when the first digit exceeding zero is printed and relocates the changeover contact, which is then blocked in its new position. After it has been written down of the amount, the blocking is mechanically lifted.

This arrangement has disadvantages. First, a failure of the relay (for example Sticking of the anchor or the like) or the blocking causes disturbances. Second, one must special device for lifting the block must be provided, and thirdly, there is no possibility of if desired, print a zero before a comma.

The invention shows one way such as a leading zero suppression device can be formed that is not afflicted with any of these defects. It consists in the fact that it can be tilted through the sliding contact slide controlled contact plates are provided, the radial contact points with discharge and Feed line contacts cooperate during their decade-bridging axial contact points can only make contact with each other, such that when a contact plate is tilted, an untilted one Contact plate only receives voltage via the decade contact if it is in a lower decade. In the drawing, the invention is shown by way of example. It shows

1 shows a schematic longitudinal section through one with a forward run suppression device writing calculating machine equipped according to the invention, toggle contact device in rest position,

Fig. 2 is a plan view of the device according to Fig. 1,

3 and 4 show the device according to FIGS. 1 and 2, the contact plates, however, set for a value.

Leading zero suppression device

for computer-controlled office machines

Applicant: (L <r f /

Camille Lavijfe, Paris

Representative:

Dipl.-Ing. R. Müller-Börner, patent attorney,

Berlin 33, Podbielskiallee 68

Named as inventor:
Camille LaviUe, Paris
The co-inventor has requested
not to be named

Claimed priority:

France of October 25, 1951 (No. 618 264)

The numerals of value (Fig. 1) are in the calculating machine 1 entered with a keyboard 2. Each of the keys "0", "1", "2", "3" etc. in each vertical row the keyboard 2 lifts a stop 17 when depressed, which is used to move the rack 15 in a position determined by the numerical value to stop by the stop 18 of the rack starts against the stop 17 of the key. The positions of the racks 15 are known in Way converted into electrical pulses that are available at the outputs 6 'of the contact field stand to operate the electromagnets «8 of recording devices. Everyone corresponds these outputs a numerical value of a digit. A cam 19 is provided in the calculating machine, which completes one revolution with each actuation, with a switch 20 closed each time will.

A sliding contact slide 21 with a sliding contact 28 is assigned to each rack 15. He is slidably guided in a slot 22 of a comb 23.

The sliding contact slide 21 is constantly at 24 in contact with the rack 15, namely by means of a spring 25 which is attached at one end at 26 to the frame of the calculating machine 1 and to its other end engages the slide 21 at 27.

The sliding contact spring 28 can have a series of ten fixed contacts 6, which the values

409 509/202

»0« to »9« correspond to overflow. The sliding contact springs 28 of the individual decades are parallel switched and are connected via the line 29 to the switch 20, which is from the power source 5 is fed through line 30. '

The spatial arrangement of the fixed contacts “0” to “9” and the sliding contact springs 28 is such that when the rack 15 assumes a position which corresponds approximately to the number "3", the Sliding contact spring 28, which belongs to this decade, the fixed contact "3" of the associated row touched. Therefore, when the switch 20 is closed under the action of the cam 19, the fixed contact "3" of the decade of tension.

There are as many rows of ten fixed contacts 6 in the contact field as Racks 15, that is to say decades, are present in the calculating machine. This number is equal to that Maximum number of digits that can be mastered with the calculating machine.

The aim of the invention is to suppress such pulses at the outputs 6 'that are zero which are in front of a value-determining figure of an amount. To this end you can For the explanation of the mode of operation it is assumed that the "suppression switch 31" is in Position »right«.

If a certain rack 15 is now brought into the "0" position, ie to the left, it is moved the associated contact plate 32 is only slightly in the counterclockwise direction. These Displacement is not enough to make contact between 62 and 37, and ίο is also not enough to break the contact between 36 and 40. In this position, the Output contacts 6 'for zeros that are in front of a value-determining digit, i.e. upwards of a decade, no current, even if contact plates 32, which correspond to the decade determining the value, are tilted are. For example, this would be the case for the zeros on the HT and ZT racks (Fig. 2 and 4) stand.

In contrast to this, the non-tilted ao contact plates 32 for zeros that are behind a value-determining digit, i.e. down a decade, Tension from the tilted contact plates located upstream of the decade, which lead to the value-determining Decades belong, and are therefore capable of the

transmit the output connections of all fixed 25 voltage pulses. This is sample contacts "0" of the numeric contact field by means of a wise for the zeros the case with the second and

third toggle contact (Z, H in Fig. 4) belong.

In the numerical example "007009" (Fig. 4), the first two are therefore in the pulse transmission Zeros suppressed, and the punch causing the recording, for example, only punches the Number "7009".

If, however, the leading zero perforations are also to be made, the switch 31 (FIG. 1) is in full

be pulled in the opposite direction. To bring the 35 drawn left position. Then contact plates 32 are made of insulating material and no impulses go over the contact plates 32. The NuIlunt carry a contact piece 35 with an output contact 36, speaking fixed contacts 6 that switches in the direction of impulses. (Fig. 1 and 2) with an input contact 37, further
with a decade 40 switching in the axial direction
downward contact 38 and a decade upward con-

Leading zeros suppression device for a full-key field calculating machine in decadic Steps electromagnetically controlled, record-creating office machme with a numeric contact field on which the numeric values are connected to the arithmetic rods Sliding contacts are set, characterized in that tiltable, through the Sliding contact slide (21) controlled contact plates (32) are provided, the radial contact points of which (36,37) cooperate with lead and lead contacts (40, 62), while their decade-bridging axial contact points (38, 39) only make contact with one another can, such that when a contact plate (32)

Changeover switch 31 are interrupted. The impulses for the important ones to be recorded "Intermediate zeros" are then supplied by a leading zero suppression device.

This device is composed of a number of tiltable contact plates 32, which are on a common Axis 33 are pivotably mounted and by a spring 34 constantly in a clockwise

Claims (1)

Claim: bar 39. In the rest position shown in FIGS. 1 and 2, the output contact 36 touches a contact spring 40, which is connected to the changeover switch 31 by a line 41. The contact plates 32 are normally held in its rest position by a shoulder 42 of the associated sliding contact slide 21. When the sliding contact slide 21 is pulled to the left in a position corresponding to a certain number is, the relevant contact plate 32 is released and tilts into a position (Fi g. 3 and 4), in which the input contact 37 touches a busbar 62 which is connected to the switch 20. At the same time the contact between the output contact 36 and the spring 40 is canceled because the Spring 40 is held in place by a stop 43. The decade up contacts 39 and the decade down contacts 38, on the other hand, are arranged so that a contact plate 32, which the in F i g. 3 shown Position, in contact with the neighboring, not tilted decade-down contacts38 remains, but no longer touches the adjacent contact 39 located upstream of the decade, if the latter is not tipped. is tilted, an untilted contact plate (32) only then voltage via the decade contact (39) gets when it lies in a decade deeper. Considered publications: German patent specifications No. 347 637, 606 715, 138, 756 877; Swiss Patent No. 96 494. 1 sheet of drawings 409 509/202 2.64 © Bundesdruckerei Berlin