US75362A - caldeea - Google Patents

caldeea Download PDF

Info

Publication number
US75362A
US75362A US75362DA US75362A US 75362 A US75362 A US 75362A US 75362D A US75362D A US 75362DA US 75362 A US75362 A US 75362A
Authority
US
United States
Prior art keywords
little
piano
same
strings
points
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
Publication date
Application granted granted Critical
Publication of US75362A publication Critical patent/US75362A/en
Anticipated expiration legal-status Critical
Application status is Expired - Lifetime legal-status Critical

Links

Images

Classifications

    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10CPIANOS, HARPSICHORDS, SPINETS OR SIMILAR STRINGED MUSICAL INSTRUMENTS WITH ONE OR MORE KEYBOARDS
    • G10C3/00Details or accessories
    • G10C3/16Actions

Description

Jak L .L MJ h 2 Sheets-Shet 1.

L. CALDERA & L. MONTU. PIANOFORTE.

Patented Mar. 10, 1868.

2 Sheets- Sheet 2.

L. CALDERA & L. MONTU.

NANO-FORTE.

Patented Mar. 10

.z WWW ma "onms arms m Paufoumo.. wnsnm initeh tst/es atent ffir.

L. CALDERA AND L. MONTU, OF.TURIN, ITALY.

dla ,rlzsnle rrfrmt min twe 3mm! rtnt mit making gm ni the same.

T0 WHOM IT MAY COIGERN:

Be it known that we, L. CALDERA and L. Momo, of Turin, in the Kingdom of Italy, have invented a certain 'new and improved `Piano-Forte, called Malo-Piano; and we hereby declare the following to be a full, clear, and exnct description of the same, reference being had to the accompanying drawings.

One of the most common objections made 'to the piano is that it lacks fullness in its tones. The sole Instrument by which the strings are enabled to prolong their vibrati'ons consists et presentoof the loud or footpedal, which can be used at pleasure by the. pianist. By this means the duration of the waves of sound can be prolonged only during the "forte" passagcs in a piece of music; whilst. during the pianc' passages-that is to say, thepassages in whichkthe sound-should have but little intensity-the sounds obtained are muflied, weak, and possessed of little fullness or duration.

The principal feature of our invention consists in`an improvement which renders the tones of the piano sweet and prolonged, resemhling those Produced by a bow or by a. wind-instrument. In order to attain this result, vwe have oonceivcd the idea of'combining with each pair of strings a little metallic hammer, covered with felt, Dnd. provided with an elnstic or .sprngohandle` Weimpart to this 'little hammer a very rapid oscillatory movemeng'by means of clock-work, or equivalent mechnnism, which aetuates a wave-faceci cam, by which the 'oscillations are produced. The oscillations 'of the little hammer follow each other at intervals 'of time shorter than the duration of Waves of sound, andconsequently n..conti nnous andeeveli soundis Produced:I

To enabie others tfo understand and use our invention, we will now proceed to describe the manner in which the same is or may be carried into efiect by reference 'to the accompanying drawings, in which- Figure lrepresents a side-elevation of'our improved mechanism applied to thevordinary mechanism ofa piano.

Figura 2 is a front view of the samei' The key a of the key-board lifts the little cylindrical rod b, and consequently the lover c,.n'lch turns on its pivot d. This movement `of the l'ever c raises the hopper e, which throws forward the hammernpon the string g. During this time the metal red lz, 'monnte'd'on the axis of the lever'c; is'brought in conta'ct with the shank of'the felted damper j, which rests on^ the string, 'andforces it to move, on its axs k, away from the string, which is thns permitted to vibrate. This arrangement of mechanismis new, and devised by us. The reaction of the springs lm'sufiices to bring all the parts back to their normalposition. The rod n has also, during the same time, caused the lever o to turn upon its centre, and, consequently, by drawing back the other arm' of the lever p, to. disengage the little-hammer g, wbichwe have before mentioned. This little hummer, which is aetuated by aspiral spring in thebarrel A, immediately commences to vibrnte with great rapidity; and 4thns are Produced sounds. prolonge'd and sweet, like those produced by a bow. w

The organization of the clock-work movement will be readily understood. The barrel A actuates the conical fusee B, through the m`edium of the'belt C. The toothed wheel D, mounted on the arbor of the fusee, imparts motion to the pinion E, and, consequently, to the wheel F, the pinion G, and the wave-faced cam H. The projecting parts of this cam successively strike against 'the roller I, thns imparting a rapid oscillatory movement to the little hummer g. The fly-wheel J and the regulator K serve only .to regulate-the m'ovement. The rollers L and M rolling against the axis of the onm render its movement less diflicult, by preventing friction to a certain extent. All the little oscillstory hsmnierspare fixted'on the same arbor, N,'which-ext.on(ls the length of the piano. The movement of the arborisfacilitated by supportin'g it ontwo pointed scrows O P.

In order to wind up the spparatus, a key may be fitted on the shank Q, or, preferably, fa. crsnk may be employed, which is placed outside of the piano-case, and'communicates with the wheel R, `through the medium of a Vaucanson, or band-Chain, or other suitable mechanism. This method of vib'rating the strings through the medium o f the hammers g, gives rise 'to a new line ofepins r, a' new curve of the wrest-plan'k, and a new line for the strikngof the strings by the hammerf. i

Figura 3 represcnts these curves, which are constructed as follcrws:

A straight line, b' z',is drawn, which is divided into as many equal parts as there are strings to the pianofor instanee, five octaves or sixty-one strings. At all the points of division perpendiculars'ar erected, which serve to determine the two cnrves. On the perpendicular at b' we take a'b', equal toone-fourtlh of the actual distance between the wrest-plank and the point at which the large hammers strike, and b' l', equ'al to three-fourths of the same distance. The points a' and Z'will be the respectiye points of the two cnr'ves. As the form of the Wrestplank for very heavy orvei'y sharp ton'es is the same, we Will consider a' Z' as the ninth string of=the key-board. In order to obtain theldistance corresponding to'the twenty-fifth string, we take e' d', equal to'o'ne-fifth of the length of Z', and e'. m', eqnal to four-fifths of a' Z'. The points d' and m' will be 4the respective points of the two curves. We obtain in a like manner the other points of the curves, which are then tracedv through all the points. By drawing a line, 'c"l', parallel tob' 74', and 0 ni. 004:` mili. below, we have the line of striking of the small hammers q.

Having now descrihcd our in'vention, and the mhnner in which the same is or may be carried into effect, what we einim, and desire to secure by Letters atent, s-

1; The method of prolongng the vib'rations of the strings of a. piano, snhstontialljr in the manner and by the means herein shown and described. I

2. The combination, with the ordinary striking-hammer, damper, and other parts of the action of a. piano, of an nuxiliai'y oscillatory or'vihratory hummer :md clock-work, 'or equivalent mechanism, for iniparting the desii'ed motion to the same, snbstantially intho manncr and for the purposes herein shown and deseribed.

In test-imony whei'eof, we have signed our names to this specifieation before two subscribing witnesses.

' L. OLDER'A,

.L. MONTU. Witnesses O. LAroUD, .Mms HAND.

US75362D caldeea Expired - Lifetime US75362A (en)

Publications (1)

Publication Number Publication Date
US75362A true US75362A (en) 1868-03-10

Family

ID=2144869

Family Applications (1)

Application Number Title Priority Date Filing Date
US75362D Expired - Lifetime US75362A (en) caldeea

Country Status (1)

Country Link
US (1) US75362A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070186189A1 (en) * 2006-02-06 2007-08-09 Yahoo! Inc. Persistent photo tray

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070186189A1 (en) * 2006-02-06 2007-08-09 Yahoo! Inc. Persistent photo tray

Similar Documents

Publication Publication Date Title
US3316792A (en) Pedal-actuated drum beater device
Blackham The physics of the piano
Ortmann The physical basis of piano touch and tone
US4262576A (en) Percussion instrument striking apparatus
US4019A (en) Pianoforte
US6740800B1 (en) Portable keyboard tremolo musical instrument
US4161129A (en) Modified piano striking mechanism
US2480131A (en) Electrical musical instrument
US4307647A (en) Percussion mallet
EP1287519B1 (en) Piano action with articulated jack
US4854211A (en) Action mechanism of an upright piano
US2084266A (en) Musical instrument
US1259062A (en) Stringed musical instrument.
US2483617A (en) Musical instrument
US5594188A (en) Keyboard musical instrument having key action mechanisms movable to and from strings
US1791720A (en) Piano teaching instrument
Hipkins A description and history of the pianoforte and of the older keyboard stringed instruments
US2329009A (en) Piano action
US3270608A (en) Piano action
Palmieri The Piano: An Encyclopedia
US527533A (en) Martin h
US3453922A (en) Jack and tongue construction for harpsichords and the like
US2466498A (en) Piano action
US4840101A (en) Escapement mechanism for upright piano
US1750051A (en) Wind instrument