DE2250269C2 - Control device for suppressing the type pressure in power-driven key-operated and memory-controllable typewriters - Google Patents

Description

50

The invention relates to a control device for suppressing the type imprint in power-driven key-operated and memory-controllable typewriters, with a single type carrier that can be moved against the recording medium for printing, with a number of electromagnets actuated according to the respectively selected types or functions until the type carrier is set the selected type or its media publication or non-print-Ijewegung, and also with a special non-6a-pressure Tnste for the non-pressure of a type and with non-printing function keys flir non-Druckfunk-! ion as Lcerechritt , Regression, etc.

Typewriters are known in which the imprint of the «5th entered characters is interrupted and only the switching steps assigned to the characters entered triggered ncr-like facilities serve to determine the length of the characters with normal distance between the words before making a fair copy. To produce a brief with excluded Lines then in a second step the same text is entered again, but with an imprint of the characters, by correcting the spacing between words, emc can be standardized « Line length, i.e. an excluded right line margin be achieved.

To achieve the above-mentioned demand is by the German Auslegeschrift 1 611 447 an order with only a single type carrier that can be moved against the recording medium for printing known to which no impact energy is given when the pressure is not set. The disadvantage here is that the type carrier still makes all adjustment movements including switching to prepare for the printing of the typed character. Only the impression movement is omitted, which is caused by moving the cam disk onto one Non-pressure cam ring section is achieved by the non-pressure key.

The object of our invention is to provide cmc Device for a typewriter of the aforementioned type, but with Ansk RrwKselektromagneiui. When in the non-pressure position you do not press the button next to the suppression of the impression movement the adjustment movements of the type carrier are also omitted.

This object is achieved according to the invention by interrupting the excitation of the electromagnets electrical switches which can be actuated by the non-pressure key or one of the non-pressure function keys is controllable. In particular, two switches are provided here, one of which is in the circuit to the electromagnet for the impression movement and you- others in the circuit to the electric magnets are arranged for the adjustment movement of the type carrier. This creates the possibility that the impression movement is also omitted if the type carrier makes an adjustment by 180 °, d. H, executes the switching movement. Another advantage is that the switching frequency of the electromagnets is brought to a minimum. The electromagnet for the impression movement is only excited if the imprint is not to be taken. The electromagnets for the adjustment movement of the type carrier on the other hand, are only excited to set the type carrier. The parts subject to wear and tear are operated as little as possible. This has a very beneficial effect on the service life of the entire machine.

An embodiment of the invention is described below with reference to the figures. It shows Fig. 1 is a section through the keypad,

Fi g. 2 is a schematic representation for an electromagnetic device controllable setting gear for a type carrier,

F i g. 3 a circuit arrangement for the electromagnets,

4 shows a perspective detail from FIG. 1, in particular the control rail, and

FIG. 5 shows a side view of the control rail from FIG. 1.

For a character selection, when a key lever 1 is actuated according to FIG. 1 an intermediate lever S released via a release lever 3, which in the starting position with a? Nose 1 through the

f >;

$? ■■■.,

Force of the spring 9 held against a stop 11 The mode of operation of the subject matter of the invention is, The intermediate levers 5 have coded approaches folcende:,, 13, which during the longitudinal movement ^ intermediate move during normal writing weh lever 5 coding rocker 15 pivot. These actuate the triggered intermediate levers 15 by means of the Ausra coding rockers 15, contacts 17 β, 17 ft, s wrestled 66 of the control rail 55, i. ft. üieMcuor-17 c, VJd, VJe, which now control pulses via rail 55 is not pivoted and the selection lead wires 19 to an adjustment mechanism of a magnet 29 is not energized. In this case, for each spherical type carrier 23, eccentric drive 50 arranged on a carriage 21 which can be moved along the platen roller, the working cycle of the first drive device is always given with the drive shaft. ₁₀ coupled, since the control member 49 is constantly in the active part of the setting mechanism is in FIG. The shown schematich. The only essential thing is actually only switch 17 e does not need to be actuated each time and that the setting of the type carrier 23 via off selection magnet 29 is not excited, whereby Wahlmagnetc 25, 26, 27, the switching movement over these parts are spared. Only if the intermediate selection magnet 28 and the impression levers 67, 68 of the secondary functions such as switching can be controlled via a selection magnet 29. Empty step, backward step, etc. are operated, the selection magnets 25, 26, 27, 28 bring control the control rail 55 pivoted, as these in the Ba members 30, 31, 32, 33 in the effective range of a first rich of these intermediate levers 67, 68 cores Cut-out drive device 34, which has an eccentric gene, but rather lugs 69, 70. The forward drive 35 can be driven. The control rail 55 is pivoted via a control device 20 via its a.-oi

36 the eccentric drive 35 is closed with a drive shaft 65 of the switch 17 e , dn the Auswin.i-

37 coupled, which magnet via a bevel gear pair 29 is energized and pulls the control member>) 38/39 with a circumferential main shaft 40 in standard from the active region of the first Antnebseinrichtui g DIGEM engaged. The control members 30, 31, 32, 33 34. The eccentric drive 50 is not coupled with the WcIIj, the eccentric drives 41, 42, 43, 44 coupled with a 25 47 and the impression movement is also omitted via a bevel gear pair 45, 46 of the what at the Above mentioned secondary functions also main shaft 40 driven shaft 47. The eccentric is not desired.

Drives 41, 42, 43 set via a differential lever - If the right edge is now excluded, gear 48 is the type carrier 23. The switchover should, the non-pressure button lever 56 m that of the type carrier 23 is pivoted via the eccentric 30 latching position 63/64. Here, via 44, the tension member 58 also the pivot lever 59 yer-The selection magnet 29 controls the control member 49, which pivots, via its arm 61, the control rail, which can be coupled to the drive device 34, 55 to the left against the force of the spring 60 ycr- and eir.c eccentric drive 50 pushes with the drive shaft. This shifting of the control rail 47 couples. The switch 53 is opened via a lever system 51, ie the circuit slide 52 for the impression movement back and forth 54 to the switches VJa ... VJd and the corresponding. corresponding selection magnet is interrupted. In Fig. 3 is a circuit diagram for the selection, setting or switching movement is not shown magnets 25, 26, 27, 28 and 29, which is more possible. In this position the control rail can be controlled using switches VJa ... VJe. In the 40 '55 all intermediate levers 5, 67, 68 abut against the circuit 54 to the selection magnets 25 ... 29 is lugs 71, 69, 70 of the control rail 55. The Steuerein additional switch 53 is arranged, which is in the rail 55 for all functions pivoted, axial displacement of a control rail 55 actuatable whereby the contact 17 e closed and the off is (Fig. 1 and 4). The displacement of this control selector magnet29 is excited. In the non-pressure bar 55 against the force of the spring 60, the non-pressure key lever is not positioned in the area of the keyboard, i.e. both the setting movement and the down »pressure key lever 56, which is arranged in the area of the keyboard Bolt 57 pressure movement of the type carrier 23. The one stan-; Swiveling and a tension member 58 subject to a wear-ended eccentric drives 41, '£ angle lever is connected 59th The angle lever 59, 42, 43, 44, 50 of the differential lever system 48 is, with an arm 61, constantly in contact with the 50. Since the control rail 55 for the spring-loaded control rail 55. In the normal position, suppression of the imprint while running, the non-pressure button lever 56 is on one of the secondary functions such as switching, space step, * ■ stroke 62, while this is in the non- Pressure position regression etc. is already present anyway, erionit its bolt 63 by a locking spring 64 ae- possible the present invention, with extraordinary JOieiten. In Figure 5, the side view of the 55 borrowed little effort is shown under extensive control rail 55, the dash-dotted line of use of existing machine parts and drive the shifted position is indicated. The control elements, including the suppression of the adjustment rail 55, interacts via an arm 5 with the movement of the type carrier 23 in the non-pressure switch 17 e . Position.

1 sheet of drawings

Claims (3)

Patent claims: 1. Control device for suppressing the type imprint in the case of power-operated key and memory-controllable typewriters, with a single one for printing against the recording medium movable type carrier, with a number of electromagnets actuated according to the selected types or functions until the type carrier is set to the selected type or its imprint or Non-imprint movement, and further with. a special no-print key for no-print one type and with non-print function keys for non-print functions, such as space, Step backwards, etc., characterized by the excitation of the electromagnets (25 to 29) interrupting electrical switches (17, 53) whose actuation by the non-press button (56) or one of the non-printing function keys can be controlled. 2. Control device according to claim 1, with which the impression movement of the type carrier can be suppressed, characterized in that two switches (17 e, 53) are provided, one of which (17 e) in the circuit to the electromagnet (29) for the impression movement and the other (53) are arranged in the circuit to the electromagnets (25, 26, 27, 28) for the adjustment movement of the type carrier (23). 3. Control device according to claim 2 with Kodierschwingeii, which can be pivoted by actuating the key and power-driven intermediate lever for actuating the switch to the electromagnet for the setting movement of the type carrier, characterized in that one more, with lugs (69, 70, 71) and recesses (66) provided control rail (55) cooperates with the intermediate levers (5, 67, 68), which can be pivoted by the intermediate levers (5, 67, 68) for actuating the first switch (17 e) assigned to the impression movement and by the in the area of the Keypad arranged non-pressure button lever (56) for actuating the setting movement of the type carrier Zugcord netcn second switch (53) is axially displaceable