DE1220869B - Key mechanism for power-driven typewriters with or without punching device - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY GERMAN #W PATENTAMT Int. Cl .:

B 41 j

EDITORIAL

German class: 15 g - 40/01

Number: 1 220 869

File number: J 18853 VII b / 15 *

Filing date: October 12, 1960

Opening day: July 14, 1966

The invention relates to a key mechanism with a normal number of keys, e.g. B. a standard keyboard, for power-driven Typewriters with or without punching devices with selection and adjustment facilities the types assigned to the keys and, if necessary, punch.

To control z. B. Printing devices in typewriters and similar machines, it is known Longitudinally movable, provided with incisions or recesses of different arrangements and sizes Use rails, their respective position to each other in combination with the selected characters is equivalent to.

In such a known arrangement, for example, six rails are provided, their longitudinal movement optionally by the mechanical action of the relevant key lever on the incline Surface of V-shaped incisions worked into the rails is brought about. This longitudinal movement individual rails are then turned into a corresponding angle for adjustment of a character wheel exploited.

In another known arrangement for the reproduction of plain text contained in coded punch cards Information is given to adjust the rails according to the scanned perforation of two Groups of magnets each excite a magnet, and through this the code rails are by means of their Recesses of engaging fingers moved, whereby corresponding contact combinations closed will. These contacts are then used to control a raster printing unit. The recesses in the rails are of different sizes and arrangements.

A well-known wire printer that also uses rails to control the printing elements, has plunger-like transmission members, which are slidable by the associated pressure wires through perforated ribbon-shaped rails are separated. With each printing process, all plungers are against the Rails are pushed, and only those plungers are effective for actuating the pressure wires, all of them Penetrate rails. For this purpose, the rails are of different sizes before the push rod is actuated Steps shifted from their basic position and thus cause one to be printed with regard to their perforations Combination corresponding to characters.

The invention also uses longitudinally displaceable rails with different recesses Arrangement and size are provided and their position in combination the selected characters represents. In contrast to the well-known pre-key mechanism for power-driven typewriters with or without a punching device

Applicant:

International Business Machines Corporation,
Armonk, NY (V. St. A.)

Representative:

Dipl.-Ing. H. E. Böhmer, patent attorney,

Boeblingen, Sindelfinger Str. 49

Named as inventor:

John Edwin Hickerson, Lexington, Ky. (V. St. A.)

Claimed priority:
V. St. v. America October 14, 1959
(846400)

directions but in the invention, the longitudinal movement of the rails after their release a locked position is partially prevented by using only certain selected rails in combination perform an equally large longitudinal movement. The selection of the individual rails is from directly controllable from the keyboard of the machine. The invention is characterized in that each Key is assigned a latching rod that is locked against spring force and can be triggered when the key is pressed by means of an approach over a bracket common to all locking rods, an arm and a handlebar a locking pawl triggers to release everyone who is constantly under the force of tension springs Longitudinally movable rails that have short and long recesses in one according to their coding have the number of buttons or locking rods corresponding total number, and that the selected The locking rod simultaneously engages in the recesses of the rails assigned to their position, with the effectively released rails in combination electrical contacts can be actuated and / or mechanical control functions can be triggered.

In the case of the key mechanism according to the invention, only a slight actuation of the selected key is required, to trigger the corresponding adjustment of the rails. This is advantageous after another

609 589/55

3 4

Embodiment of the invention substantially equal- back side on the plate 3 in front of the keys (in

tert, if the locking rods, which are fastened by means of teeth (Fig. 1 right).

are lockable by designed as a key carrier on the rear (left in FIG. 1) edge of the

Spring steel strips can be triggered, between the par-plate 3, the individual key supports 2 are perpendicular

allel extending ends are assigned the button on a conical 5 guided locking rods 6; each locking bar 6

vexen bulge is arranged. is provided with an elongated hole 8 through which to

For the purpose of resetting the locking rods in guiding the locking rod movement, a round rod 9 their locked starting position and at the same time protrudes. Each locking rod 6 carries on its front Resetting the locking jaws of the rails a tooth 11, which is on an associated projection is in this case, according to a further advantageous embodiment, io 12 rests on the rear edge of the plate 3. on the invention of the bracket, which previously unlocked this way, each locking rod is against the action the rails were used, locked by means of a tension spring 14 by means of an electromagnet. The bottom of everyone liftable. The rails are a further development, the locking bar is offset and designed as a pin 15 of the inventive concept in a particularly advantageous manner in an opening 16 of a U-shaped guide is guided by means of a rail 18 in uniform, aligned 15. Inside the guide rail Long holes in them engaging pin in their 18 are thin ribbon-shaped control rails 19, in Starting position resettable, the pin being referred to as rails 19 on a subsequent one, angeunter the force of an electromagnet swiveling arranges the length with recesses 20,21 Lever is attached. 'are provided. The width of the recesses 20, 21

Further embodiments of the invention, the 20 corresponds to the width of the pins 15; against it The recesses 21 are advantageously designed to be considerably longer in power-driven typewriters Punching device are applicable, relate to the recesses 20, so that they can be used in a the pin 15, which is constantly driven by the stroke, causes a certain longitudinal movement of the ner punch in combination optionally prevent rails 19.

is derisible; this can be achieved either via the 25. Each of the rails 19 is at its right-hand end Rails operated electrical contacts, which in turn are provided with an elongated hole 22 by means of which they Electromagnet for actuating pivotable locking is guided on a pin 23. The pin 23 is on control lever, or attached to the rails by a spring-loaded lever 24, its own Projections that can be pivoted around a bolt 25 in the path of the other hand. That the Punch can be adjusted so that the working 30 bolt 25 is opposite end of the lever 24, stroke of certain punches mechanically immediately as long as this is not actuated, prevented by a will. . locking pawl26 locked, which thus the swivel

The invention is prevented in the following in some movement of the lever 24,

management examples on the basis of the schematic drawing The left ends "of the rails 19 (Fig. 1) are each

explanations. 35 connected to tension springs 28 which hold the rails 19

Fig. 1 shows diagrammatically the arrangement of a constantly trying to pull to the left, so that the

Key mechanism according to the invention, with only the right-hand end of the elongated holes 22 on the pin 23

Understanding essential parts are shown; issue. As long as the rails 19 are shown in the

F i g. 2 shows the longitudinally movable rails are held in position, the recesses are

their recesses, namely in their starting 40 gene 20 and in each case the left part of the recesses

position, as well as the recesses in the individual 21 exactly below the pins 15 of the locking rods 6.

If one of the keys 1 is pressed, it will slide

sign; rear end of the key holder 2 due to its

Figure 3 is a perspective view of an arched shape over the plate 3 and pushes

punching device controlled by the keypad, where- 45 the associated locking rod 6 to the rear, whereby

when some parts are shown in section; this is unlocked. Below buttons 1 is a

F i g. 4 shows the circuit for the axis 29, which controls the stroke of the keys 1, by way of explanation of the keypad 'with the punching device, as soon as the key carrier 2 the locking rod so tang according to FIG. 3, and moved far backwards that tooth 11

F i g. 5 is the perspective view of a punch 50 slides off the projection 12 and thereby the Ab ^

Device similar to FIG. 3, but with immediate upward movement of the locking rod under the effect

mechanical control of the punch movement of the spring 14 causes

through the strips of the keypad. Behind the locking rods 6 there is one on

In the illustration according to FIG. 1 are in place. known locking device that prevents a complete keyboard with all 55 occurring more than one locking rod 6 excavated at the same time Letters, digits or characters can be appropriate. This lock consists of a U-för key only two buttons 1 shown. Each key 1 is a shaped frame 30 with slots 31 corresponding to it a key support 2 attached, which record from thin gene locking rods 6 when triggered. There is spring steel strip, which as a result of its upward rollers 32 are arched in the frame 30 so as to be longitudinally displaceable Form on 'actuation of the associated 60 stores, and the sum of the distances between the Button changes its effective length. The front individual rollers 32 is dimensioned so that only The ends of these straps are attached to one of the locking rods 6 in the associated slot 31 by means of a retaining plate 4 a plate 3 clamped while its can be brought. When triggering a locking set ends between the surface of the plate 3 rod 6 move in a known manner and a guide plate 5 are freely guided. The 65 rollers 32 of the frame 30 so that all the others Key carrier 2 of all keys can also be blocked from slots 31.

be made of a single piece of spring steel sheet, in the lower half of the rear edge which is cut in the shape of a comb and with its each locking rod 6 is a projection 35, the

5 6

cooperates with a bracket 36, which is pivoted. The contact 52 is part of a control side horizontally over the entire width of the latching circuit, which will be described later.
Rod assembly runs and at its two Aus F i g. 2, the distribution of the recesses 20 ends by means of arms 37 and 38 is pivotably mounted and 21 in the rails 19 and their assignment is to. The arm 38 carries an approach which is connected to the locking pawl 26 via a 5 the individual letters, digits and characters erLenker 41 visibly.

is and this is actuated during the downward movement of the bracket 36 Die on the left ends of the rails 19, so that the lever 24 is released. Such designations serve to identify as long as the handlebar 41 is not actuated, one of the rails 19 when the described tension spring 42 is used ensures that the locking pawl 26 remains in its operative position in a typewriter. The arms 37, a single spherical type carrier, which extend beyond the axis 39 to the rear for the purpose of setting the selected type to 38, and carry tabs 44 as anchors, which are simultaneously rotated and inclined by electro-print magnets 45 are attracted as soon as they are attracted this must be excited. The two upper rails Γ1 and Γ2 are. The excitation of the electromagnets 45 pivots 15 correct the inclination of the type carrier around one or that is the bracket 36 counterclockwise, ie two units, and the remaining rails R1, R 2 upwards, and which are just moving or moving in the lower position. RS determine the rotational movement of the type-specific locking rod 6 is promoted by the bracket 36 by a corresponding number of units, being lifted as soon as it strikes against the shoulder 35 of the clockwise direction of rotation and the locking rod 6. In this return movement for ao negative of the counterclockwise direction of rotation, the locking rod 6 engages the tooth 11 again corresponds to sense.

the projection 12 on the plate 3, so that when using the keyboard described in

Locking rod 6 is locked again. a typewriter of the previously marked

If a locking rod 6 is already raised as long as Art closes when a locking rod 6 is triggered

the associated button 1 is still pressed, then the bracket 36 hits the contact 52, which connects the coupling

the upper end of the locking rod 6 turns on to the end of the magnet of the typewriter. Same-

Key support 2, which bends sufficiently, promptly causes the downward movement of the bracket 36,

in order to lock the locking rod 6 again as described, also unlocking the lever

possible. Simultaneously with the lifting of a latching 24 and releasing the movement of the rails 19 after

rod 6, the locking pawl 26 is left by the 30, unless it is released by the pin 15 of the

Bracket 36 pivoted back into its effective position, given locking rod 6 are held. At the

to lock the lever 24 as soon as it starts moving the clutch magnet of the typewriter

Starting position according to FIG. 1 is reset. a shaft is driven, which via cams the

When a locking rod 6 is triggered, the pin engages the circuits of those contacts 48 which were actuated by the rails 19 in the recesses 20 and 21 of the rails 19 35. The combi; at the same time, the approach 35 pushes the locking rod 6 nation of these contacts 48 then causes the bracket 36 downwards. As a result, the locking magnets of the selection device of the machine, the release pawl 26, are swiveled out, and the lever 24 sets the corresponding letter. Was now equips the longitudinal movement of the rails 19 z. B. the key 1 for the letter A is actuated, so under the action of the tension springs 26. The 40 now becomes, as shown in FIG. 2, only the rail following changes in position of the rails 19 can Γ 2 released for their movement to the left, which causes those rails 19 to move to the left under the effect of a tilting movement of the type carrier around two springs 28 that are triggered at the point on units will.

the pin 15 engages, long recesses 21 after the imprint of the set character

point; on the other hand, the rails with short 45 are the rails 19 by the writing

zen recesses 20 held by the pin 15. machine-controlled excitation of the electromagnet

Each of the rails 19 carries near the end at which 51 is retracted into its starting position; The springs 28 attack approximately the same time, on one side another electric shock 47 is triggered by cam contacts, which closes the affected circle by the electromagnet 45 during the longitudinal movement, so the rails 19 to the left an associated cone 50 that the bracket 36 also the released locking rod 6 clock 48 closes. According to FIG. 1 are six rails sliding back into their locked position. The bracket 19 and six contacts 48 are provided, which each individually 36 also actuates the locking pawl 26, so or in any combination that the lever 24 is locked after the return of the rails according to the selection of the longitudinally moved 19.
Rails 19. 55 The keys shown in FIG. 1 also

To reset the rails 19 in their output controllable punching device according to FIG

Position according to Fig. 1, the lever 24 with a number of punches 205, which in corresponding

angled part 50 provided as an anchor, which are supported by the bores in a block 206 and

an electromagnet 51 is attracted as soon as there is a recess 207 in the base

this is excited. The lever 24 is against 60 block 206 through this up to its bottom

swiveled clockwise, pulls through the pin extend side. Each of the punches 205 is from

23 the drawn-out rails 19 back and is surrounded in a coil spring 208, which is between the

the previously described way by the pawl 26 lower part of the recess 207 and a collar ",

locked. At the rear end of the arm 37 (in Fig. 1 209 on the punch 205 is effective, so that the

left) a further contact 52 is arranged, each of which protrudes 65 punch 205 beyond a plate 210, the

Weil is then closed when it is attached to the upper part of the block 206 under the action and the

a triggered latching rod 6 of the bracket downward loading recess 207 covers. Block 206 is open

moves away and thus the lever 37 can be displaced in a clockwise direction

their upper end is screwed to a fixed plate 214; between the plate 214 and the Plate 210, compression springs 215 are effective, so that the block 206 is pressed down. On the bolt 212 a die plate 216 is arranged between the heads and the block 206, the stepped Has holes 217 for receiving the punch 205 as soon as the die plate 216 is up is moved. Spacer washers 218 are located between the block 206 and the die plate 216, in order to enable the insertion of the recording medium to be punched, e.g. tape.

In the plate 214 bores 220 are provided for receiving the upper ends of the punch 205, when these are moved up with block 206. At the bottom of the plate 14 are at 222 L-shaped lever 221 is attached pivotably parallel to the plane of the plate. According to the number the 'control rails 19 are six punch

205 and six levers 221 are provided. One end of each of the levers 221 interacts with one of the bores 220 in FIG the plate 214 together, and each lever 221 is pressed against a stop 225 by a tension spring 224 held in which position the end of the lever 221, the bore 220 leaves free. The opposite Ends of levers 221 are associated with electromagnets 226 which, when energized, pivot the lever 221 and thus the closure of the holes 220 by the opposite Effect ends of levers 221.

Is a lever 221 during the upward movement of the block 206 under one of the bores 220, the corresponding punch 205 is stopped by the lever 221 and, since the die plate 216 with the block 206 is moved upwards, pushed through the bores 217, wherein a The recording medium lying between the block 206 and the die plate 216 is perforated at this point will. As in the circuit diagram of FIG. 4 is shown by the rails 19 of the keypad Controlled contacts 48 connected to the electromagnet 226, so that in the recording medium the holes corresponding to the pressed key are punched.

For- the up and down movements of the block

206 and the die plate 216 are at their ends. Cam follower plates 228 fastened with recesses 229 in which disks 231 are eccentrically fastened on a shaft 230 and which cause the die plate 216 to be raised and lowered when the shaft 230 rotates. When an electromagnet 234 is energized, a clutch 233 causes the drive to be transmitted from a continuously rotating belt pulley 235 to the shaft 230. The electromagnet 234 is energized under the control of the contact 52, which is closed each time a button 1 is pressed three cams attached, actuate contacts CB-I, CB-2 and CB-3. The contacts CS-I are connected on the one hand to the positive side of the power source and on the other hand through the rail-controlled contacts 48 and the electromagnets 226 to the negative side of the power source. The contacts CB-2 and CB-3 control the connection of the electromagnets 45 and 51 to the power source, as can be seen from FIG.

In Fi g. 5 shows a punching device which is similar to that of FIG. The rails also assume the functions of the levers 221 in FIG. 3 and the circuit with the contacts 48, the electromagnets 226 and the contacts CB-I, which means a significant structural simplification. This arrangement enables

ίο that while the rails do the operation of the punching device 3 control, they simultaneously also the contacts 48 for a printing unit or a other punch according to FIG. Press 3.

Claims (7)

Patent claims: 1. Key mechanism with normal number of keys, e.g. B. a standard keyboard for power-driven typewriters with or without punching device with facilities for selecting and setting the The types assigned to the keys and, if necessary, punches where longitudinally movable, Rails provided with recesses of different arrangements and sizes in one of the selected ones Characters are adjustable in combination representing position, characterized in that that each key (1) is locked against spring force (14) when the key is pressed releasable locking rod (6) is assigned, which by means of a projection (35) on all locking rods (6) common bracket (36), an arm (38) and a handlebar (41) a locking pawl (26) triggers zur'Freigabe all constantly longitudinally movable rails (19) which are under the force of tension springs (28) and their coding correspondingly short and long recesses (20, 21) in one of the number of buttons (1) or locking rods (6) have the corresponding total number, and that the selected locking rod (6) at the same time into the recesses (20, 21) of the rails assigned to their position (19) engages, whereby by the effectively released rails (19) in combination electrical Contacts (48) actuatable and / or mechanical. Control functions can be triggered. 2. Key mechanism according to claim 1, characterized in that the locking rods (6) by means of Teeth (11) can be locked and triggered by spring steel strips designed as key supports (2) are, between the parallel ends of the key (1) on a convex curvature is arranged. 3. Key mechanism according to claim 1, characterized in that to block the not triggered Locking rods (6) a known frame receiving the unlocked locking rod (6) (30) is provided with longitudinally movable rollers (32), the sum of which is less than the strength of two locking bars (6). 4. Key mechanism according to claim 1, characterized in that for the purpose of resetting the locking rods (6) in their locked starting position and for the simultaneous resetting of the locking hooks (26) of the rails (19) of the bracket (36) can be raised by means of electromagnets (45). 5. Key mechanism according to claims 1 and 4, characterized in that the rails (19) by means of a pin (23) engaging in them in uniformly aligned elongated holes (22) their initial position can be reset, the pin (23) on one under the force of an electromagnet (51) pivotable lever (24) is attached. 6. Key mechanism according to claims 1 to 5 for power-driven typewriters with punching device, characterized in that the stroke of constantly driven punch (205) by means of the contacts (48) controlled, by electromagnets (226) pivotable lever (221) optionally preventable in combination is. 10 7. Key mechanism according to claims 1 to 5 for power-driven typewriters with punching device, characterized in that at the ends of the rails (19) aligned transversely to their direction of movement, the effectiveness of constantly driven punch (205) mechanically selectively preventing projections (238) are arranged . ίο Publications considered: German patent specifications No. 961038, 964 609, 1120471;
U.S. Patent Nos. 2,353,083, 2,643,753, 941,2,919,002. 1 sheet of drawings 609 589/55 7.66 © Bundesdruckerei Berlin