DE1274139B - Lock script control device for an interchangeable latch switch lock - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

[nt. CL:

B 41 j

German KL: 15 g - 27/03

Number: 1274139

File number: P 12 74 139.8-27 (010518)

Filing date: November 17, 1964

Display day:!. August 1968

The invention is concerned with an improvement in a switch lock that has an indexing rod on the paper cart of a typewriter with two tooth pitches of different lengths, alternately releasable pawls (change pawls) in direct interaction with the Coarse-toothed carriage shift rod works. She has set herself the task, this kind of key switch with a simple, controllable device for working with double character step for generation to be provided by blocking script.

The well-known change pawl switch lock works so that that of the two pawls that just the paper trolley by engaging its switching rod and creating the corresponding reveal of an elongated hole the pawl stops on a guide pin fixed to the frame, by one on a release arm on her attacking step trigger is lifted out of the switch rod, so that she is the train follow a spring engaging it against the step ao direction of the paper carriage, that is, in the gripping direction and after just one way you can cover your release arm with the step release can withdraw from the action of the same, in order to immediately return to theirs under the train of the same spring Ready position to fall into engagement with the shift rod teeth. Meanwhile the other one Switching pawl that was in readiness in a corresponding manner from the previous lifting process, from the next tooth face of the switching rod on the one that starts moving after the described triggering Car captured in order from him in the direction of the step up to the plant of their corresponding elongated hole embrasure to be taken along on the guide pin and to stop him in this contact position. Because of the Half a shift rod division of different lengths of the two pawls is followed by this stop a carriage step of the length of half a shift rod division, the latter so to achieve of a certain, e.g. B. the normal character step twice as long as this must be.

According to the knowledge of the invention, you only need the standby of the two pawls, which alternately control a carriage step equal to half a shift rod division equal to a character step, z. B. to raise by a barricade switch for the duration of the barricade writing and thus ineffective to cause the other pawl after it has been triggered to stop the paper trolley after a step equal to a full switching rod division, equal to a double character step. To block script control device for a
Interchangeable latch switch

Applicant:

Olympia Werke A. G., 2940 Wilhelmshaven

Named as inventor:

Helmut Ressel, 2940 Wilhelmshaven

for this purpose, the two pawls get close to their with the toothing of the shift rod cooperating teeth additional, in the direction of gripping pawl lugs with which they in their gripping and readiness position cover a blocked font lifter, which by the known device can be actuated to switch to barricade and with this switchover the currently in standby position lifts the pawl located. In their working position the ratchets, however, have the additional Latch noses no overlap with the lock script extractor.

According to the invention, by the barricade switching device the ratchet that is in the ready position cannot be directly accessed by the barricade collector, but indirectly via a state switched to blocking script at the same time the ratchets of the step release subject to the barricade removers are excavated.

In this way, both ratchets can perform their functions for step backwards, carriage lift and tabulation regardless of the position of the locking script switching device, so both with normal and with Do block-type writes.

The drawings show one possible embodiment of the invention, namely

F i g. 1 the arrangement of a locking script extractor in an effective action in cooperation with the locking script release latch noses and

F i g. 2 shows the arrangement of FIGS. 1 in normal font.

According to the invention, the pawl, which is not intercepting, is arranged such that it can be lifted out by actuating a corresponding actuator. _{For this purpose, a barrier font lifter 4 (} FIGS. 1 and 2) is arranged, which is mounted pivotably and displaceably on the pivot axis 2 with an elongated hole A ₁ and in its left position - which applies to the barrier script - with a lifting edge 4 2 the latch lugs 7 _4th

809 588/49

or H _{4 of} the pawl that is in readiness is covered. With a release end 4 ₃ , the lifter 4 lies above the step release 5 and, when it is actuated, is activated together with the load-bearing ratchet — in FIG. 1 of the pawl 7 - detected and pivoted clockwise, with its lifting edge 4 ₂ the pawl nose 1I ₄ of the pawl 11 lying on the tooth I ₂ in readiness detected and this out of overlap with the rack teeth - tooth I ₂ - brings.

After the pawl 7 has been triggered when a locking step is triggered, has already withdrawn from the step trigger 5 by its gripping movement to the right and, _{lying on the back of the tooth I 1} , has fallen into the next tooth gap in front of the tooth I ₂ , the switching rod 1 moves to the left and has the effect that even if the step trigger 5 and thus the lifter 4 return to their illustrated rest position very early, the tip H _{2 of} the thereby released pawl 11 no longer in front of, but behind the tooth I ₂ in readiness for tooth I. ₃ comes up for a next step and can no longer influence the paper trolley step that is currently being carried out.

As long as the lifter 4 is in the left, in FIG. 1 is the position shown, each time the step trigger S triggers a block script step 2 1 by the pawl 7.

With a position of the pawls as a starting point, as shown in FIG. 2 is shown, remains with the same position of the lifter 4 as in FIG. 1 - this combination is not shown on its own - the operation of the ratchets 7 and 11 compared to the previous description with reversed roles. Initially, the pawl 11 carries and is triggered together with the lifter 4, which latter lifts the other pawl 7, so that only the pawl 11 controls the barricade step 2 1 = T , as long as the lifter 4 is in the left position according to FIG is located.

If normal writing is to be used, a plunger 8 '(Fig. 1 and 2) is moved in the direction of arrow 14 (Fig. 2) by resetting the customary blocking-type dialing device, whereby an angle lever 9', which is supported at 15 in the frame , is pivoted clockwise and, with a bend 9 / grasping behind a switching edge 4 / of the lifter 4, pulls it to the right, against the action of a spring 3 that _{engages one eye 4 4 of} the lifter 4 and moves it into its left, Effective position tries to pull, as far as its elongated hole 4 _± with its right reveal 4 _t ' allows this. As a result, on the one hand, its lift-out edge 4 ₂ comes out of engagement with the latch nose 7 ₄ or 1I ₄ of the pawls 7 and 11 that are in readiness, and on the other hand its release end 4 _g out of the range of motion of the step trigger 5, so that the switching pawls 7 and 11 work normally and alternately trigger a single character step t.

Claims (1)

Claim: Control device to achieve a locking script for an interchangeable pawl switch lock that works directly with a coarse-toothed indexing rod on the paper trolley of a typewriter, in which the respective supporting, of two by half a switching rod division, of different lengths on a frame-mounted pivot axis in an elongated hole can be longitudinally displaced by up to the specified dimension guided and spring-loaded switch pawls in the gripping and engagement direction can be triggered alternately by a step trigger acting in the direction transverse to the switching rod from the switching rod teeth and, after being triggered by its spring, this step trigger is immediately arranged to re-enter the next tooth gap of the switching rod in the gripping direction, characterized by a means Switch (8 ', 9', 9 /) actuatable, two-armed, on the pivot axis (2) of the switching pawls (7, 11) mounted lifter (4, 4 ₃ ), which against the pull of a spring (3) with its lifting edge (4 ₂ ) can be adjusted longitudinally by means of the switch in the area of the pawl lugs (7 ₄ , 1I ₄ ) and can be pivoted about the pivot axis (2) using a step trigger (S). Considered publications: German Patent Specifications No. 280 042, 975 956; U.S. Patent Nos. 1994544, 2536 619. 1 sheet of drawings 809 588/49 7.68 © Bundesdruckerei Berlin