Classifications

• • G—PHYSICS
  • G10—MUSICAL INSTRUMENTS; ACOUSTICS
  • G10C—PIANOS, HARPSICHORDS, SPINETS OR SIMILAR STRINGED MUSICAL INSTRUMENTS WITH ONE OR MORE KEYBOARDS
  • G10C3/00—Details or accessories
  • G10C3/16—Actions
  • G10C3/24—Repetition [tremolo] mechanisms

Definitions

• the invention relates to a repeating mechanism for pianos with a jack actuated by a pilot, which transmits the key stroke to a hammer nut articulated on a mechanical beam and which is deflected in the course of the stop movement of the hammer about a joint axis in such a way that the frictional connection between the Key and the hammer butt is interrupted, and which is pressed back into its shock-transmitting working position during the return movement of the hammer delimited by a catch moved by the key and a counter catch attached to the hammer butt by means of a jack spring and a spring-loaded repeating arm.
• a repeating mechanism for pianos has already become known (DE-OS 31 39 404), which in principle is constructed and functions in a similar way to the repeating mechanism of a grand piano.
• the jack is pivotally articulated on the free end of a lifting member, which is mounted in the horizontal position by means of a lifting member capsule on a horizontal mechanical beam and is seated on a pilot of the button by a lifting member saddle.
• the repeating lever which is located in an inclined position and is pivotably mounted on a bearing support of the lifting member and on which a hammer roller rests, is arranged above the lifting member.
• a plunger is pivotally mounted on an angled lever arm of the jack, which is opposed by a set screw as a trigger manikin, which is arranged in a bearing tongue of the butt.
• the upper end of this plunger projects through a recess of the repeating lever articulated on the lifting member, the upward movement of which is limited by a second adjusting screw, which is also in the bearing tongue of the butt is arranged.
• This known repeating mechanism is not only very complex and complicated, but also difficult to implement because it consists of too many individual parts that are positionally adjustable and difficult to adjust.
• the invention has for its object to provide a repeating mechanism of the type mentioned above for pianos with a simple, more easily adjustable, cheaper to manufacture and consisting of fewer parts structure and which in its advantageous mode of operation is similar to a grand piano repeater mechanism or at least comes close.
• the jack is articulated and supported directly on the butt eccentrically to the hammer joint in such a way that, in its rest position, it sits either directly on a pilot of the button or on a lifting member pivotably articulated on the mechanical beam and delayed is deflected by the hammer stroke movement and is pivoted next to the pilot or next to a support surface of the lifting member which is limited in the deflection direction and that the repeating arm is arranged either by means of a repeating arm capsule on the button or resiliently pivotably on the lifting member seated on a pilot of the button.
• This solution principle according to the invention is essentially based on the features that the jack is articulated directly on the butt and that the jack is steered in the course of the hammer blow movement next to a support surface which is limited in the deflection direction. Its main advantage over the known repeating mechanism for pianos is in particular that significantly fewer individual parts are required and the entire repeating mechanism is much easier to assemble and adjust. However, fewer parts also mean that the individual buttons or hammers are operated more easily and quickly, and thus a much more sensitive game.
• the invention can be implemented in different embodiments.
• FIG. 1 a repeating mechanism for pianos in their rest position
• Fig. 2 the repeating mechanism of FIG. 1 with the key partially pressed
• Fig. 3 the repeating mechanism of FIG. 1 and 2 in the toner-generating stop position of the hammer
• Fig. the repeating mechanism of Fig. 1 to 3 in through the catcher and countercatcher limited return position of the hammer;
• FIG. 6 shows the repeating mechanism of FIG. 5 in the tone-generating striking position of the hammer
• FIG. 7 shows the repeating mechanism of FIGS. 5 and 6 in the return position of the hammer limited by the catcher and the counter-catcher.
• FIG. 9 the repeating mechanism of FIG. 8 in the final phase of the striking movement of the hammer
• FIG. 10 shows the repeating mechanism of FIG. 8 at the end of the backward movement of the hammer with the key still pressed
• Fig. 12 shows part of the lifting member of Fig. 11;
• FIG. 13 shows a sectional view XII1-XIII from FIG. 12.
• a mechanical beam 1 for storage on the upper side the butt 3 is arranged a butt capsule 2, which carries the butt by a hammer joint 4.
• the hammer handle 5 with the hammer core 6 and the hammer head 7 "of a hammer 7 1 is fastened to the hammer butt 3 in a conventional manner.
• a counter catch handle 8 with the counter catch 9 is arranged on the hammer butt 3 on the side opposite the hammer head, which interacts with a catcher 10, which in turn is fastened in vertical position directly on the button 19 by means of a catcher wire 11.
• the catcher wire 11 projects through a recess 12 of a repeating leg 13 which runs essentially parallel to the button 19 and which is connected to one by a joint 13 '
• Repeating arm capsule 14 is pivotally mounted.
• the repeating arm capsule 14 is arranged directly on the button 19 and has a horizontal leg 15 with an adjusting screw 16, with which the exact horizontal position of the repeating arm 13 can be adjusted, in which the upper side of the repeating arm 13 is flush with the face of a pilot 20 of the T branches 19 *
• the repeating leg 13 is under the influence of a repeating leg spring 17, which is also fastened to the repeating leg capsule 14 and presses the repeating leg 13 upwards against the adjusting screw 16.
• the pretensioning of the repeating leg spring 17 can be regulated by means of an adjusting screw 18.
• a substantially vertical jack 22 is seated, which by means of A hinge 23 is articulated directly on the butt 3 and is also pressed against a butt set screw 27, which is arranged in the horizontal position in the mechanical beam 1, by means of a jack spring 24, which is designed as a leaf spring, and is attached to the butt 3.
• a trigger screw 25 is arranged on the jack 22, which is fastened transversely in the jack 22 and the head of which rests on a support surface 26 of the butt 3 with a delay when the hammer 7 'strikes ⁇ movement executes.
• a so-called. Kink screw 28 arranged adjustable.
• the damping mechanism consists in the usual way of a damper pilot 29 seated on the button 19, which acts on a damper balance 30 which is pivotably mounted on a damper balance capsule 34 and acts on a damper lever 33 via a damper spoon 32.
• the damper lever 33 is pivotally mounted on a damper lever capsule 34 by means of a joint 36 and is under the influence of a damper spring 35, which exerts a torque on it in the counterclockwise direction of rotation and causes the damper adjusting screw 37 to constantly press against one lifting rod 38 which is usually present is pressed.
• Both the damper scale capsule 31 and the damper lever capsule 34 are each attached in the usual way by means of screws to the measuring device. chanikbalken 1 attached.
• the button 19 is, as from Fig. 2 can be seen, mounted in the usual way on a balance beam 40 by means of balance beam pins 41.
• FIGS. 1 to 4 The operation of the repeater mechanism shown in FIGS. 1 to 4 is as follows: starting from the rest position shown in FIG. 1 and in which the button 19 assumes its normal horizontal position, the repeating leg 13 is in a position in which its upper side is flush with the end face of the pilot 20. If the button 19 is now pressed, the button shown in FIG. 1 shown button section in a pivoting movement upwards. This pivotal movement is transmitted by the pilot 20 directly to the jack 20 and from there via the joint 23, which is arranged eccentrically to the hammer joint 4, to the butt 3 and thus to the hammer 7 * , so that this pivots in the counterclockwise direction around his joint 4.
• the repeating leg spring 17 causes the repeating leg 13 to be raised again until it rests on the snap-off screw 28.
• a slight pivoting of the hammer 7 'or the butt 13 in the counterclockwise direction of rotation is effected. If the button is released slightly in the direction of the rest position by slightly lifting the actuating finger, the jack 22 is positioned above the pilot 20 again under the influence of the jack spring 24, so that by pressing the button again from a partially depressed position the fully depressed position causes a new hammer blow on the string.
• the pilot 29, which acts on the damper balance 30, causes the damper arm 30 to be deflected clockwise around the joint 36, which means that it is lifted off the string during the button operation.
• the repetition angle i.e. H . the angle by which the key 19 must be moved back towards the rest position before a new hammer blow on the string not shown in the drawing can be effected can be varied by the snap screw 28. It is clear that the torque to be applied by the repeater leg spring 17 must be sufficiently large so that the repeater lever 13 is able to counteract the weight torque of the hammer 7 'and to overcome this and the jack 22 on the raised pilot 22 to lift.
• a lifting link capsule 31/1 is provided in this embodiment, on which a lifting link 45 is mounted in the manner customary for pianos.
• the damper spoon 32 which causes the damper arm 33 to be lifted off, is fastened to a short lever arm of the lifting member 45.
• the lifting member 45 which is in its horizontal rest position in FIG.
• a repeating leg 13/1 is arranged by means of a joint 47, which has a repeating leg head 13/2 protruding through the recess 46 from bottom to top with a somewhat obliquely running support surface 13/3 and which is provided with a break-through screw 28/1 protruding through an opening 49 of the lifting member 45, which comes to rest on the underside of the mechanical beam 1.
• a helical compression spring 17/1 the repeating arm 13/1 is on an essentially U-shaped, supported the recess 48 and the recess 46 bridging support bracket 45/1, which is part of the lifting member 45 and a deflection of the repeating arm 13/1 downwards.
• This support bracket 45/1 lies on the head of a pilot 20/1 of the button 19/1.
• the catcher wire 11 is fastened with the catcher 10/1 in a conventional manner, which cooperates with a counter catch 9/1, the counter catch stem 8 is fixed in the butt 3.
• the pilot 20/1 presses the lifting member 45 and the jack 22 which is supported thereon, so that an impact movement of the butt and the hammer 7 'in the counterclockwise direction of rotation about the hammer joint 4 is done.
• the jack 22 is then also pushed through the trigger screw 25 resting on the support surface 26 of the butt 3 into the position shown in FIG. 6 shown position pivoted, in which the lower end of the jack 22 is next to the bearing surface 46 'above the repeating leg head 13/2 and thus no longer has a direct connection to the lifting member 45.
• the repeating leg spring 17/1 causes a lift on the Repeater leg head 13/2 seated jack 22 to the height of the support surface 46 'of the lifting member 45 and the jack spring 24 pivot the jack 22 clockwise around its hinge 23, so that the jack 22 comes to rest against the jack adjusting screw and rests on the support surface 46' of the lifting member 45 .
• a hammer blow can be carried out again from the key position that has already been or still partially depressed by completely depressing the key again.
• Fig. 8 to 13 shows a further exemplary embodiment of the repeating mechanism for pianos according to the invention, which differs from that of FIG. 5 to 7 mainly differs by a different design of the lifting member and the repeating leg.
• 8 to 13 such individual components which are also present in the same or similar form with the same mode of operation in the exemplary embodiments described above are provided with the same reference numerals.
• the somewhat slimmer and higher cross-sectional shape of the mechanical beam 1/2 used in this exemplary embodiment results in somewhat changed geometric relationships.
• the jack 22/2 has a greater length than the jack 22.
• the jack 22/2 is also articulated by means of a joint 23 on a butt 3/2 of a hammer 7 'and is provided with a release screw 25 which comes to rest on a support surface 26 of the hammer 3/2 and a deflection of the Jack tongue 22/2 causes when the hammer 7 'executes its striking movement about the axis of the joint 4.
• the butt 3/2 is pivotally mounted in the butt capsule 2, which in turn is attached to the mechanical beam 1/2 in the usual way.
• a lifting member 45/2 is pivotably mounted about an articulation 31/2 below the mechanical beam 1/2 in an essentially horizontal arrangement has short lever arm 45 'and a longer lever arm 45 ".
• the damper spoon 32 is arranged in the usual way, which acts on the damper arm 33 in the manner already described above.
• the longer lever arm 45" extends over the end of the key 19/2 provided with a pilot 20/2, so that it executes a pivoting movement upwards when the key 19/2 is struck.
• the area resting on the pilot 20/2 is provided with a damping pad 50 on the underside of the lifting member 45/2.
• a fork support 51 is firmly attached to the top of the lifting member 45/2.
• this fork support 51 has two fork legs 52 and 53, between which there is a slot-like cavity 54.
• fork legs 52 and 53 each have a support surface 55 and 56, to which stop horns 57 and 58 are connected. These stop horns 57 and 58 serve to secure the support of the jack 22/2 on the support surfaces 55 and 56.
• the arrangement of the support fork 51 on the lifting member 45/2 is made so that the lower of noise-damping material, for. B. leather, existing rounded foot 59 of the jack 22/2 in its rest position on the support surfaces 55, 56 in the in the Fig.
• a leaf spring 63 is attached to the lifting member 45/2, the foot piece 63 'of which is inserted from above into the cross section of the lifting member 45/2 and which emerges from the top of the lifting member 45/2 merges into an essentially horizontal leg 64, which extends in the longitudinal direction of the lever arm 45 "between the two fork legs 52 and 53 below the foot piece 59 of the jack 22/2.
• This spring leg 64 which as a result of the approximately right-angled arc-shaped bend permanently under an upward, ie. is spring force directed against the foot piece 59, forms in this embodiment the repeating leg, which in the embodiment of FIG. 1 to 4 in the form of a lever arm 13 and in the embodiment of FIG.
• the spring leg 64 is integrally connected by a bow 65 to a second spring leg 66, the rounded end piece 67 of which rests resiliently on the outside 68 of the jack 22/2 and with respect to the joint 23 exerts a torque in the clockwise direction of rotation on the jack 22/2.
• the spring leg 66 thus forms the jack spring in this embodiment, which in the embodiments of FIG. 1 to 7 consists of a separate leaf or bar spring 24.
• the repeater leg and the jack spring thus consist of a single part, namely a leaf spring 63 which is fixedly attached to the lifting member 45/2.
• repetition leg is at the same time designed as a spring leg 64 of the leaf spring 63, in the place of which a rod or wire spring could also be used, no special repetition leg spring is required in this embodiment, as is the case with the exemplary embodiments described above is.
• a catcher 10/2 is also present here, which is by means of a
• the lifting member 45/2 is also provided with a ribbon wire 69, which is connected by a ribbon 70 to the counter catch 9/2. This prevents the spring leg 64 from lifting the hammer out of its rest position.
• the hammer handle 5 In the rest position of the hammer 7 ', the hammer handle 5 does not rest against the hammer bar 70, which is shown only schematically, consists of damping material and serves only as a baffle bar.
• the hammer bar 70 which is shown only schematically, consists of damping material and serves only as a baffle bar.
• Kink screw 28/2 For the adjustable limitation of the upward movement of the spring leg 64, on the underside of the mechanical beam 1/2, a so-called. Kink screw 28/2 arranged.
• the hammer 7 makes a stroke movement around it . Joint 4 in the counterclockwise direction.
• the stop surface 26 moves against the release screw 25 of the push-pull tongue 22/2 until it finally abuts it and the push-tongue 22/2 also deflects in the counterclockwise direction of rotation about the joint 4.
• the hammer position in which this deflection movement of the jack 22/2 begins is shown in Fig. 9 shown. It can be seen that in this position the spring leg 64 of the leaf spring 63 already bears on the snap-off screw 28/2 and can no longer follow the further upward movement of the lever arm 45/2.
• the described exemplary embodiments show that the repeating mechanism according to the invention only requires two or three additional parts compared to a piano technique without a repeating device, and that these parts hardly take up more space than normal piano mechanics.
• the adjustment of the individual parts to one another is also very simple and clear, so that the repeating mechanism according to the invention can be implemented easily and at low cost.

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• Physics & Mathematics (AREA)
• Engineering & Computer Science (AREA)
• Acoustics & Sound (AREA)
• Multimedia (AREA)
• Electrophonic Musical Instruments (AREA)

Applications Claiming Priority (4)

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Family

ID=25830994

Family Applications (1)

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Family Cites Families (8)

• 1985
  • 1985-12-05 DE DE19853543064 patent/DE3543064A1/de active Granted
• 1986
  • 1986-03-17 WO PCT/DE1986/000115 patent/WO1986005912A1/de not_active Application Discontinuation
  • 1986-03-17 EP EP86901807A patent/EP0216830A1/de not_active Ceased
  • 1986-12-02 KR KR860700861A patent/KR880700383A/ko not_active Ceased

Non-Patent Citations (1)

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