DE3047317A1 - Pocket size braille printer - has six tabs operating press studs and blank index tab - Google Patents

Abstract

The paper supply tape is wound on a reel in the hollow base of the printer. The six tabs pivot about a common axis to operate press studs which press into the paper tape. An automatic index for the paper feed is controlled by the return stroke of the tabs, while a middle tab operates a blank feed. A selective control enables the automatic paper feed to be inhibited so that the user can operate the tabs singly with one finger and then index the tape using the blank feed tab. This enables handicapped users to print correctly. The printer is flat and compact and simple to operate.

Description

Pocket typewriter for Braille blind dot writing

The invention relates to a pocket typewriter for Braille blind dot writing, in which the characters are actuated by means of embossing pins that can be operated by writing keys be embossed in a paper strip, consisting of a flat, closed Housing that contains the mechanism for embossing the characters, for transporting the paper strip and contains the roll of paper.

According to the German Auslegeschrift 1082919 such a Braille pocket typewriter is known, which, however, has the following major disadvantages: It is impossible to do it quickly Writing, possibly shorthand, because of the rectangular shape of the buttons of the Braille character "" ", because of the space bar arrangement on the left and their necessary actuation for the transport of paper strips of characters to characters, as well as because of the missing double stroke. Also must for a Each time the paper roll is put into operation on a swiveling paper roll holder attached and the paper strip between the embossing pins and the counter plate as well as be introduced between the transport roller and counter roller. These preparatory measures must be undone to put away in a bag. In the state of use So this is no longer a pocket typewriter.

Another common Braille strip typewriter is relatively large and heavy and therefore not a pocket typewriter.

As a further disadvantage, it requires more pressure to write and to Commissioning, a housing cover and the space bar must be folded out. she has a somewhat complicated introduction for the paper strip and is against dust prone to failure.

The pocket typewriter according to the invention overcomes the disadvantages of this Machines by the measures specified in the patent claims with the other Advantages: With a size of approx. 14 x 12 x 4 crl -91IC-9OL space, hetrii.Et the room volume and the weight of the pocket typewriter only approx. 25% from that bigger machine. Much easier writing pressure, the usual row arrangement the writing keys as well as the central arrangement of the space bar with the double stroke device, enable professional shorthand use.

No preparations are required for commissioning.

The insertion of the strips is easy even with one hand.

The machine is insensitive to dust and can also can be cleaned quickly and easily.

The attached drawings show the following exemplary embodiments: 1: Top view of the machine without the top cover (29).

Of the parts located below the intermediate surface (23) are only shown: counter plate (8), embossing pin lever (5), transport roller (15), counter roller (16), partition (27) and slot (28).

Fig. 2: Top view of a horizontal section through the machine below the intermediate surface (23) at the height of the embossing pin lever (5).

The left embossing pin levers (5) are in the working position, the right embossing pin lever (5) in rest position. Of the writing keys (1) are the lower cam (4), the cam (20) of the space bar (18) is shown. The cams (4) are located in the paper transport slide (9) with the transport lever (11.) and the pawl (14) and also the space bar cam (20) in the rest position.

The dashed representation of the transport lever (11) shows his Working position for double stroke.

Fig. 3: Side view from the right as a section to the right of the first write key (1) right of the machine center. All moving parts are in the rest position here.

FIG. 4: Side view from the right as a section like FIG. 3.

The write button (1) with the associated embossing pin lever (5) and the The paper transport slide (9) with transport lever (11) are in the working position for embossing a character.

Fig. 5: Side view from the right as a section to the right of the space bar (18).

The space bar (18) is located with the paper transport slide (9) and the transport lever (11) in working position for double stroke.

The write button (1) to the left of the central bearing (24) is indicated by a dashed line the associated embossing pin lever (5) shown in the working position.

The six one-piece writing keys (1) are with the key surfaces arranged in a row next to each other, around one lying transversely at the rear ends yemeinsamc axis (2) can be pivoted vertically and angled downwards at axis (2) (Figures 1, 3-5).

Each write button (1) is on the rear edge of the angled part at the corresponding height of the embossing pin lever (5) assigned to it for actuation shaped into a rearwardly protruding cam (3) (Fig. 3-5).

In addition, the lower one is the same for all writing keys (1) The end of the angled part is shaped as a cam (4) for transporting paper strips with the embossing of a character the paper transport slide (9) to the rear is moved (Fig. 4).

As a special version for writing for hand-damaged blind people with possibly only one finger, the writing keys (1) become without the lower ones Cam (4) executed, whereby without the normally simultaneous paper strip transport the points necessary for a character are embossed one after the other can and now the paper strip transport to the next character position through Press the space bar (18).

The six one-piece embossing pin levers (5) are between the writing key cams (3) and the rear wall (22) of the housing at the corresponding height of the write key cams assigned to them (3), arranged in three pairs lying across and flat on top of each other, on the outer one The end of each group of three can be pivoted on a common vertical axis (7) stored and at the rear edge of the end pointing towards the center of the machine, one at a time shaped embossing pin (6) protruding to the rear (Fig. 1-5).

A counter plate (8) with exactly the same as the embossing pins (6) Counter-indentations, is attached to the rear wall of the housing (22).

(Figs. 1-5).

The write key cam (3) for one character at the same time actuated writing keys (1), press the front edge of the associated embossing pin lever (5) and swivel them horizontally backwards with their embossing pins (6) between the embossing pins (6) and the counter plate (8) from right to left paper strips (33) guided therethrough (Fig. 2, 4, 5).

The paper transport slide (9), shaped as a flat plate, lies underneath the writing key cam (3) on the housing base (30). It has two openings in the back (10), in which the write key cams (4) engage from above, which enable it to transport paper strips move backwards when embossing a character while transporting the paper strip for word spaces the space key cam (20) the paper transport slide (9) of presses at the front and moves it backwards (Fig. 2-5).

The transport lever (11) lies between the angled parts of the Writing keys (1) and the space bar (18) across the paper transport slide (9), is mounted on the left on a vertical axis (12), engages in the middle with the Drive pin (13) down into the paper transport slide (9) and is from the movements of the paper transport slide (9) at the right end horizontally pivoted to the rear (Fig. 2-5).

At this right moving end of the transport lever (11) the is horizontal pivotable pawl (14) attached. It engages the gear at the back to the right the paper transport roller (15) and turns it into the rest position by pulling the spring returning transport lever (11) counterclockwise (Fig. 2).

The paper strip coming from the paper roll (33) through the slot (28) (33), is between the paper transport roller (15) and the one by the counter roller lever (17) spring-loaded counter roller (16) between the counter roller lever (17) and the housing rear wall (22) transported to the embossing pins (6) (Fig. 2).

For transporting paper strips when embossing a character the pawl (14) is moved backwards so far that it moves backwards to rest position only after the embossing pins (6) emerge from the paper strip (33) engages in the relevant tooth of the gear wheel of the paper transport roller (15) and now the paper transport roller (15) rotates and the paper strip (33) to the next Character passage transported.

The angled one-piece space bar '13) is in the middle between the six writing keys (1), but in the 1 central bearing (213) with their own Axis (19) so far in front of the keypad axis (2) mounted vertically pivotable that when actuated with the angled downwards on the axis (19) and on the lower one At the end of the part shaped as a cam (20) the paper transport slide (9) for transporting paper strips for inter-word spaces presses from the front and moves backwards (Fig. 1-5).

With two lift switches of different heights (21) on both sides the housing intermediate surface (23) attached and individually horizontally under the space bar (18) can be swiveled in, the lifting height of the space bar can be of different lengths for three Word spaces are adjusted (Fig. 1, 3-5).

Except half and a full character spacing as a space between words, the swiveling out of both stroke changers (21) reaches one and a half times the distance to Paper strip transport.

Simultaneously press the space bar (18) with the typing keys (1) at the last character of a word, moves the latch (14) so far backwards, that the paper strip (33) a total of half a word space over the next character position is transported on. This double stroke enables increasing the speed of stenography.

Even with the double stroke, the pawl (14) is moved so far back that only after the embossing pins (6) have emerged from the paper strip (33) the gear wheel the paper transport roller (15) rotates and the paper strip (33) to the next character position transported.

The smallness, lightness, stability and handiness of this particular one pocket typewriter is also suitable for professional shorthand use achieved by the specially shaped one-piece housing frame with the all-round closed vertical outer wall (22), through which halfway up the interior filling horizontal intermediate surface (23), through which from the middle of the housing rear wall (22) double-walled central bearings running forward on the intermediate surface (23) (24), through the writing key axis bearings (25) on both sides, through the webs (26) and through the under the intermediate surface (23) and between the paper space and the lever space located partition (27). An additional reinforcement of the stability causes the top cover (29) and base (30) screwed to the housing frame (Fig. 1-5).

The angular shape and separate storage of writing keys (1) and space bar (18), shape and function of the embossing pin lever (5) and the mechanism for the Paper strip transport, enable the space-saving storage of the paper roll (33) under the keyboard.

This is unnecessary with other machines for transporting paper strips necessary "cross bracket under all tactile levers with the resulting accommodation the paper roll outside of the keyboard and mechanism when enlarged accordingly the machine.

Through an elongated opening (32) in the bottom cover (31) can with the groping fingers detected the reduction in the diameter of the paper roll (33) (Fig. 2-5).

To insert a new roll of paper (33) your finger is pushed through the opening (32) of the bottom cover (31) opened, now the paper roll (33) open the axle is plugged into the paper space, then the paper strip (33) through the slot (28) introduced to the paper transport roller (15), push through the counter roller lever (17) taken by the counter roller (16) and finally by pressing the space bar (18) transported to the embossing pins (6) (Fig. 2).

All levers are held or held by springs (not shown).

moved back again.

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Claims (5)

Pocket typewriter for Braille blind dot writing patent claims 1. Pocket typewriter for Braille blind dot writing, one of the characters into a paper strip by means of embossing pins to be actuated by writing keys be embossed, consisting of a flat, closed housing that houses the mechanism for embossing the characters, for transporting the paper strip and the paper roll contains; characterized in that for the six-point system of Braille blind dot writing six angled one-piece writing keys (1) (Fig. 3-5) with the key surfaces arranged in a row next to each other (Fig. 1), one at the rear Ends transverse common axis (2) are vertically pivotable (Fig. 3-5), and that a) each write key (1) on the rear edge of the angled downwards at the axis (2) Part at the corresponding height of the embossing pin lever (5) assigned to the actuation is shaped into a rearwardly projecting cam (3) (Fig. 3-5); b) at all Write keys (1) in the same way the lower end of the angled part as Cam (4) is formed (Fig. 3-5) and hereby for simultaneous paper strip transport embossed with a character, move the paper transport slide (9) to the rear moved (Fig. 4); c) in the case of a special version of the machine for hand injured persons Blind people with possibly only one finger, the writing keys (1) without the lower ones Cams (4) are executed, whereby without the normally simultaneous paper strip transport the points necessary for a character are embossed one after the other can and now the paper strip transport to the next character position through Press the space bar (18). 2. Pocket typewriter according to Patent Claim 1, characterized in that that six one-piece embossing pin lever (5) between the writing key cam (3) and the rear wall (22) of the housing at the corresponding height of the write key cams assigned to them (3), arranged in three pairs lying across and flat on top of each other, on the outer one The end of each group of three can be pivoted on a common vertical axis (7) are stored and each embossing pin lever (5) on the rear edge of the machine center pointing end is formed into a rearwardly protruding embossing pin (6) (Fig. 1-5), so that the write key cams (3) each common for one character actuated writing keys (1) on the front edge of the associated embossing pin lever (5) and press this with the embossing pins (6) horizontally backwards against the Paper strips (33) passed from right to left in front of the counter plate (8) pivot (Fig. 2, 4, 5). 3. Pocket typewriter according to claim 2 characterized by, a) the paper transport slide (9), which is shaped as a flat plate and which is located under the write key cam (4) lies on the bottom (30), which has two openings (10) at the rear into which the write key cams (4) engage at the top and use it to transport the paper strip move backwards from character to character (Fig. 4) while transporting the paper strip for word spaces the space key cam (20) the paper transport slide (9) of presses in front and moves it backwards; b) the transport lever (11) between across the angled parts of the writing keys (1) and the space bar (18) the paper transport slide (9) is on the left on a vertical axis (12) is stored, in the middle with the driving pin (13) down into the paper transport slide (9) engages and from the movements of the paper transport slide (9) on the right End is pivoted horizontally backwards (Fig. 2-5); with the one moving on the right End of the transport lever (11) the horizontally pivotable pawl (14) engages back to the right in the gear of the paper transport roller (15) and it due to the pulling action of the spring-loaded transport lever (11), which returns to the rest position rotates counterclockwise (Fig. 2). 4. Pocket typewriter according to Patent Claim 3, characterized in that that the one-piece angular space bar (18) in the middle between the six Writing keys (1) arranged, but in the central bearing (24) with their own axis (19) so far in front of the writing key axis (2) is mounted vertically pivotable that it with the one at the axis (19) angled downwards and at the lower end as a cam (20) molded part, the paper transport slide (9) for paper strip transport for Wo rt presses gaps from the front and moves them backwards (Fig. 1-5); b) that two lift switches (21) of different heights on both sides on the intermediate surface of the housing (23) are attached and can be individually swiveled horizontally under the space bar (18), whereby the stroke of the space bar (18) for three word spaces of different lengths can be set (Fig. 1, 3-5). 5. Pocket typewriter according to patent claim 4 characterized by the special shape of the one-piece housing frame with all brackets (22-28) for space-saving accommodation of the mechanism and the paper roll (33), making them Smallness, lightness, stability and handiness of the pocket typewriter is reached.