DE92092C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

The present modification of the pianinomechanics protected under No. 87694 consists in a changed position of the rotatably suspended counter-catcher tongue and the repetition link. The latter is stored on the catcher arm arranged in the bridge D instead of on the counter catcher arm or on the short pusher arm. The hammer retraction is effected by means of a strap which is attached to the catcher tongue on the one hand and to the catcher arm or to the bridge on the other.

In the drawing, FIG. 1 shows a mechanism without a special repetition element, in FIG. 2 and FIG. 3 shows a mechanism with a repeater element.

In contrast to the previous embodiments, in FIG. 1 the counter catcher tongue B is suspended directly from the hammer boss A instead of on an arm α of the counter catcher and is made angular instead of straight. The lower part of the tongue B is provided with a nose b and is connected to the pin d ' attached to the front of the bridge D by the band g . . ' The hammer A 'is held in the vicinity of the strings S after the hammer has been struck by pressing the catch tongue B against the bar J, in which the stops i for the pusher C are adjustably supported. So that the pusher C is immediately given the opportunity to step under the hammer nose when the button is pressed the slightest, the hammer is held for a moment by the nose b of the catch tongue B resting on a projection of a resilient metal bracket F , which is on the bar J is attached and can give way to the rear resiliently. As soon as the band g is pulled tight when the bridge D is retreating, the tongue B is pulled away from the metal bracket when the pusher C has moved back into its position under A when the further retreat is made. The tongue B then also pulls the hammer back. A felt pad f is arranged between the bar / and the metal bracket F.

The catcher V consists of a metal pin, the spoon-like widened end ν of which presses the tongue B against the metal bracket F on the bar J. The friction of the tongue B on the bracket F and the catcher end ν becomes very small, so that the mechanism can be operated with very little effort and with the same keystroke far more force can be developed while playing than with the previous mechanisms. In order to bring this even more to the fore, the upper end of the pusher c is also provided with smooth sheet metal fittings, in such a way that the triggering and pressing of the pusher under the hammer notch, which is done in the usual known manner, also causes less friction than since then.

In the mechanics with repetition member, as shown in Fig. 2 and 3 in the rest state and after

The hammer or the catcher tongue is held in place by means of the repetition link H , which is rotatably mounted on the catcher arm V and pushed upwards by spring k, instead of by means of attachment b and metal bracket F. The hammer retraction is also effected by coupling the opposing catcher arm V with a pin b ' attached to the tongue B by means of band g . The pressing of the tongue B after the hammer has hit the bar J is provided by a stop v \ der, which is adjustably mounted in the catcher arm V , as well as the stop side of the bar J, against which the tongues B are pressed, also covered with smooth sheet metal to reduce friction can be.

The repeater H has a peculiar hook shape so that the bent end of the stop pin O can insert into the recess h of the tongue H and no friction occurs. The stop pin O is fixed in a bar M , which rests on the continuous bar N by means of a hollow bar m and can be brought into a more or less inclined position by fastening screws attached to the side of the latter (above and below), whereby the end ο of the stop pin O the tongue H approached respectively. can be removed from the same. The exact setting of each individual stop pin is done by turning it in the bar M.

During the greater part of the hammer movement or at the beginning of the same and after the hammer has been struck, the repetition member H is always close under the tongue B. Only the last stop is effected by the pusher C alone, in that the member H is held back by the stop pin O. to avoid pressing the hammer against the strings. Immediately after the hammer is struck, the strap g is somewhat loose and when the bridge D goes back, the hammer is raised by means of its catching tongue B on the repetition link H until the strap g is tightened. In the meantime, the pusher C immediately steps under the hammer again. As already stated above, the fabric surface of the tamper leg c is also covered with sheet metal to reduce friction.

This repeater mechanism with a special repeater element is also said to be extremely light .work.

Claims (2)

Patent Claims: 1. An embodiment of the protected under no. 87694 Pianinomechanik with pivotally suspended at the Hammernufsf.AJ scavenger tongue (B), wherein the lower part of the tongue with a shoulder (b) provided is taking place during the return of the hammer on the projection of a resiliently attached to a continuous strip (J) of a metal bracket (F) , whereby the hammer is prevented from falling back for a moment, so that the pusher can again step under the hammer nose. 2. In the case of the repetition mechanism identified under 1., the replacement of the metal bracket / T ^) and the paragraph (b) of the catcher tongue (B) by a special repetition member (H), which is mounted in an arm (V) , by a spring (Jc) is always pressed against the lower end of the tongue (B) and stops the hammer retraction caused by means of the ribbon (g) after the stop until the ribbon becomes taut, so that the pusher has time to step under the hammer nose again, however the repeater (H) prevents the hammer from pressing against the strings. . 1 sheet of drawings.