SU735445A1 - Arrangement for damping type levers of typewriter - Google Patents

Description

(54) DEVICE FOR AMORTIZATION OF LEADER-LEVERS WRAPPING MACHINE

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The invention relates to a device for elastic damping of moving levers with a letter, which are located in stationary or similar machines, in particular, having increased printing speeds.

It is known a device for damping the lettered arms of a squeaking mashina, comprising load-bearing racks with movable grooves. elements and shock absorber attached to the support of the lettered levers 1.

This device is not quite suitable for use on fast printing devices. The levers with a letter located on the edges of the elastic lining bounce off and vibrate. In such cases, there is a danger that the levers adjacent to each other with the letter cling to each other as they move or reprint of the same printed sign drops out of print. The loss of the impression leads to the fact that the drive tip of the printing mechanism, which interacts with the drive roller, rises when the lever is bounced off the letter, so that it cannot lead to reprinting. Same danger

may occur with fast printing if the printing mechanism is not yet in its original position. Therefore, its drive tip is not caught by the drive roller, and the printed mark of the lever with the letter is not printed.

The purpose of the invention is to improve the quality of printing.

This is achieved by the fact that the device has spring-loaded plates hinged on racks, while the plates are connected to the support of lettered arms and have grooves in which weights are placed.

.In FIG. 1 shows a device, a vertical section; in fig. 2 - the same, vidv plan; in fig. 3 is a partial section of a spring-loaded plate with a longitudinal groove and a load; in fig. 4 spring-loaded plate and elastic lining in the resting position; in fig. 5 shows the position of the under-20 spring plate and the elastic gasket when receiving the lever with the letter.

With the screws 2, the edges of the lettered segment 1 are supported by protruding above the end part of the lettered segment, opposite carriers 3. On the support of each carrier 3, carrier posts 4 are mounted. On free shoulders 5 with bolts

6 oscillating movable plates 7. On the opposite edges of the movable plates 7 opposite to the bolts 6 are fastened the studs 8, on which the arc-shaped lettered lever 9 is located. The litter lever 9 passes between the movable plates

7 pre-liter segment 1 and parallel to it. On the upper surface of the lettered lever 9 there is an elastic lining 10, for example, of rubber, forming a support for levers with letter 11. Under the support of lettered lever 9, in this case, under the pins 8, in the direction of movement of the levers with letter 11, it is made, depending on the need , a longitudinal groove 12. Bolts 13 pass through the longitudinal grooves 12, on which protruding ends there are disk-shaped weights 14. Between the posts 4 and the movable plates 7, tension springs 15 are placed, which with one end are hung on the supports 4 and on the movable plates 7. Under the action of the force reproduced by the tension springs 15, there are movable plates 7 on the supports 9 on carriers 3. In this case, the direction of the action of the tension springs 15 and the longitudinal axes of the slots 12 lie in the same plane.

In the quiescent position (see Figs. 1, 4), i.e., when the levers with letter 11 are on the elastic lining 10, the movable plates 7 rest on the carriers 3. The bolts 13, and with them the weights 14 are on the base 16 longitudinal grooves 12. After actuation of the levers with letter 11 and after receiving the corresponding impression, they are returned by the force produced by the printing mechanism (not shown in the drawings), as well as its own weight onto the elastic lining 10. Returning arm 9 with the letter 11 is faced with an elastic under LadKom 10, whereby it deflects it and simultaneously deflects the movable plate 7 in the direction of the arrow (see. Fig. 5). The tension springs 15 are tensioned therewith. Loads 14, as well as bolts 13 due to its inertia. at this moment they remain in a quiescent position. Immediately thereafter, the upper ends of the longitudinal grooves 12 collide with the bolts 13 and tighten them in the direction of deflection of the movable plates 7. Thus, a substantial part of the driving energy caused by the lever with the letter 11 on the movable plates 7 is compensated, which is immediately extinguished by tensioned tension springs 15.

After the energy is quenched, the movable plastics 7 under the action of the tensioned springs 15 return to the rest position. The bolts 13 with weights 14, previously captured by the upper ends of the longitudinal grooves 12, thus fall on the base 16 of the longitudinal grooves 12. At this moment the weights 14 begin to counteract the tension of the tension springs 15 and partially absorb it. Thus, the interaction of the movable plates 7 with the carriers 3 will be softer and more elastic. In this way, the energy of movement of the lever with letter 11 is significantly damped, which is then completely eliminated by gently interacting the lever with letter 11 with an elastic lining 10. Therefore, levers with letter 11 after contact with the elastic lining 10 do not rebound and do not vibrate. After the lever touches the letter 11, it is possible to continue typing by it or another lever with the letter 11, to avoid the danger of possible errors.

With fast printing, the movable plates 7 as well as the weights 14 function as described above. In practice, with fast typing, the movement of the movable plates 7 affects the joint operation of the bolts b with the elastic lining 10 in the continuity of soft oscillations and soft movements of the weights 14 within the longitudinal grooves 12. Tension springs 15 have a corresponding function. the rest position is carried out so quickly that they rest on the carriers 3 before the lever with the letter 1 comes into contact with the elastic lining 10.

Claims (1)

Invention Formula A device for damping the typewriter’s levers, containing load-bearing racks with movable weights and a shock absorber attached to the support of the letter-levers, characterized in that, in order to improve print quality, it has spring-loaded plates hingedly mounted on the racks, and the plates are connected to the support lettered levers and have grooves in which goods are placed. Information sources, taken into account during the examination 1. Patent of Germany No. 1561311, cl. 15 g 45/08, 1970. "N v5 Tsa / jriiTf j SPltrr rtrr :: one