DE46912C - Repeater mechanism for grand pianos and pianinos - Google Patents

Description

IMPERIAL

PATENT OFFICE.

The construction of a mechanism forming the subject of the present invention for grand pianos and pianinos, the aim is to achieve an extremely exact release with or possibly also without repetition.

The attached drawing shows:

Fig. Ι and 1 a, respectively, the mechanics for wings. Pianinos in the position before they strike,

Fig. 2 and 2a the same after striking, while

Fig. 3. the mechanics (for sashes) in the position after a small new button press and

4 shows a section according to xx, FIG. 2a, through the shoulder s on the release arm S ¹ .

The principle of the construction of the present mechanism is this for grand pianos and pianinos same.

A is the hammer chair on which the mastiffs B for the hammers H, Fig. 1 to 3, and with the piano mechanics also the downward mastiffs B ¹ for the rockers W, Fig. 1 a and 2 a, are attached. The pusher S is rotatably mounted in the Hammernufs C and is provided with a projection or projection s formed from felt, cloth or a similar material. The doll is provided with an actuating trigger s ¹ S ¹ and the adjustable, acting on the Stöfser scavenger F are on the key T, Figs. 1 to 3, BEZW. on the rocker W, Fig. ia and 2a, arranged. T ¹ is the balance beam of the keys T, H ^{1 is} the hammer rest bar and R is the keyboard frame. The spring F ¹ acting on the pusher S is attached to the hammer chair A.

In the following, the mode of operation of this mechanism will be explained in more detail.

When the key T is depressed, the hammer H is guided against the string S ⁰ by the pusher S. At the same time, the adjusting disk s ¹ presses the pusher S. from the surface s ² and the hammer falls back after the strike, the pusher S being caught by the catcher F. When the button is released, the spring F ¹ causes the pusher S to be pressed again onto the surface s ^{2 of} the trigger S ¹ , which means that only three elements are used, namely the pusher S, the trigger S ¹ and the spring F ¹ , the triggering is effected.

When the button is completely released, the control dummy s ¹ in conjunction with the projection s sitting on the push button S causes the latter to be carried along by the control dummy s ¹ while the spring F ¹ presses the push button S against the trigger S ¹ and thus the Hammer H is pulled downwards.

The manikin s ¹ is used to push the pusher S off the surface s ^{2 of} the trigger S ¹ and to pull the hammer H downwards.

The spring F ^{1 has the} effect that the projection s occurs below the control dummy when the button is released. The upper part of the shoulder s is shaped to correspond to the diameter of the disk s ¹ , FIG. 4.

The catcher F is by means of a screw f in the key T, Fig. 1 to 3, respectively. in the rocker W, Fig. 1 a and 2 a, adjustably attached, which makes it possible that the hammers can be adjusted.

To adjust the button lever, the adjustment bar L is arranged, which has its pivot point and can be adjusted by means of the pull rod m.

Claims (1)

Patent claim: A 'repetition mechanism for grand pianos and pianinos, characterized in that the pusher S rotatably mounted in the hammer handle C is guided onto the adjustable catcher F when triggered by the doll s ¹ adjustable in the arm S ¹ and, after the key is released, by the in the hammer chair mounted spring F ¹ again on the protrusion of the arm is pressed S ¹ s ^2, where the hammer H recycling 'by means of the adjusting doll s ¹ and attached to the s Stöfser S approach takes place. For this purpose 2 sheets of drawings.