DE1075349B - Automatic color switching for computer-controlled typewriters for certain values, signs or booking columns - Google Patents

Description

Automatic color switching for computer-controlled typewriters for certain values, signs or posting columns, it is often desirable to use certain Values or signs in a different color from the usual font. colour to write. Switching devices that can be operated manually are therefore required on typewriters provided by the optional one of two or three ribbon zones in the area of the type stop can be brought. With booking machines are already Ribbon switching mechanically coupled with the minus key has become known. Furthermore, the switching movement has been proposed for a tabulating machine triggered by a camshaft driven by an electric motor. Between the camshaft and the reversing mechanism is provided with a clutch operated by an electromagnet is controlled. The arrangement is relatively complicated and expensive. aside from that the magnet must be provided with a continuous current winding, as it will last for the duration of the Domes, d. that is, until the printing in a different color is finished, under Electricity stands.

According to the invention, a color switch is proposed in which two optionally acting on the ribbon zone switch, which are alternately reset Electromagnets are provided, one of which from the calculating machine via a Control relay is operated and the other through the paper, vague in certain Positions receives voltage, with the magnets actuated by these in the circuits There are cut-off contacts that supply power after the magnets have been attracted interrupt.

The aim of the facility is to ensure that the "red spelling" can be used for multiple purposes. Numbers with a minus value can be highlighted once will; on the other hand, it is also possible to use numbers over a certain value, z. B. over 10,000 or 100,000, to be specially marked. Likewise, in banking Deposits to a specific account or deposits from a specific customer can be identified quickly and clearly using red letters.

Shall numbers above or below a certain value in red letters appear, the device for color switching via the calculating machine is closed control, while with red writing after selecting other points of view that are not according to the numerical value to operate the device manually via a keyboard is. If a whole column, e.g. B. the balance column should be labeled in red, switching on to "red" can be done in exactly the same way as switching off using the paper trolley being controlled.

With reference to the drawing, an embodiment of the invention and their mode of action explained in more detail. With the reference numbers given in the drawing are designated in detail: 1 and 2 the switching magnets, 3 and 4 the switching magnets associated limit switch, 5 and 6 two windings of a not shown Control relay, 7 the switch-on contact and 8 the normally open contact of the relay., 9 the Changeover contact for magnets 1 and 2, 10 the switch-off contact of the control relay and 11 and 12 the poles of the power source.

By means not shown in the drawing, e.g. B. a controlling keyboard of a typewriter, the switch-on contact 7 of the control relay is briefly closed when a subtraction process is initiated or when the calculating machine is pulled into minus. This creates a circuit that runs from pole 11 of the power source via switch-on contact 7, the relay winding 5 back to pole 12 of the power source. The control relay is excited via winding 5, closes its normally open contact 8 and at the same time switches the switchover contact 9 assigned to it for magnets 1 and 2. The normally open contact 8 closes a circuit from pole 11 of the power source via normally open contact 8, relay winding 6 and switch-off contact 10 to pole 12. In this arrangement, winding 6 serves as a holding winding, while winding 5 is only intended to excite the relay. Since the relay remains in the excited position via the holding winding 6, the switch-on contact 7 can be opened again. The changeover contact 9 closes the circuit to excite the changeover magnet 2. This pulls on, causes the ribbon to switch from black to red and then switches off by opening its associated limit switch 4, but remains in its end position or is locked, so that the limit switch 4 cannot close again.

The two magnets 1 and 2 are mechanically connected to each other, or the coils sit on a core, whereby the magnets alternate when excited put back. Magnet 2 is only returned to its basic position when magnet 1 is pulled withdrawn, the limit switch 4 closes again.

After completion of the write process, e.g. B. at the end of the column or when changing columns in the booking work, is through program-defining means, z. B. on the paper cart attached control rails or riders, the disconnection contact 10 open. Through this the circuit of the holding winding 6 is interrupted; the control relay drops out, opens its normally open contact 8 and puts the changeover contact 9 into the one in the drawing position shown. This switching of the contact 9 creates a circuit from pole 11 via limit switch 3, switchover magnet 1 and contact 9 to the other pole 12 of the power source closed back. The switching magnet 1 attracts, leads the The ribbon switches back from “red” to “black” and opens when it is reached End position the limit switch 3 associated with it, with which the circuit is interrupted again is.

Claims (1)

PATENT CLAIM: Automatic color switching for computer-controlled Typewriters for certain values, signs or posting columns, thereby characterized in that two selectively acting on the ribbon zone switch, themselves alternately resetting electromagnets (1, 2) are provided, of which the one is actuated by the calculating machine via a control relay (5, 6) and the other receives voltage through the paper trolley in certain positions, whereby in the circuits the magnets of these actuated cut-off contacts (3, 4) are located after the When the magnets are attracted, interrupt the power supply. Considered publications: U.S. Patent No. 1780 630.