US1381666A - Power-unit mounting for musical instruments - Google Patents

Description

G. M. RUSSELL. PUWER UNlT MOUNTING FOR MusmAL INSTRUMENTS.

\PPUCATIDN "LED DEC. 26, BIT. 1,381,666. Patented June 14, 1921.

2 SHEfTS-SHEET 1.

G. M. RUSSELL.

POWER UNIT MOUNTING FOR MUSICAL INSTRUMENTS.

1,381,666. Patentedlune 14 21.

ZSHEEYS-SHE AFPUCATIOH FILED DEC. 26. 19W.

UNITED rowan-nun: monn'rm'e FOR musrcn ms'ranmnnrs. v

STAT

as PATENT OFFiCE.

NEW YORK, assrenon T0 AMERICAN PIANO N. Y., a

CORPORATION OF NEW" JERSEY.

Specification of Letters went.

Application filed December as, 1917.

To all i0hom may concern residing in county of York,

the city Onondaga ments, tron.

This invention relates have invented an- Im Power-Unit Mountings for that I, GUY MANLY' Bossnnn, a citizen of the United States of America,

of Syracuse, in the State of New rovement in usical Instruand of which the following is a specificato the mounting of a power plant in automatic musical instruments andis particularly adapted for use in grand piano The principal object of provide an arrangement herein shown as a power plant, an electric motor,

the invention is to of parts by which comprising and a pneumatic exhaust pump may be mounted in an inconspicuous position and so mounted that the vibrations set up during the operation of the power plant will not be transmitted to the frame of the piano in such a way audible vibrations therein.

as to set up Other objects of the invention will be apparent from the following description.

In the accompanying trative embodiment of the shown, and therein- Figu of a grand piano mounted thereon;

drawings, an illusinvention 13 re 1 is a plan view of the underside showing the power plant Fig. 2 is a section on the line 2- 2 of Fig. 3 is a section on the line 3-3 of Fig. 1; and

Fig. 4 is a section on the line 4:"4 of fieferrin to Fig. 1 rear part 0 rim or frame plant is mounted between and consists of a pneumatic 13 driven the post 12, exhaust pump through a belt 15.

In automatic player struments of this character,

1 of the drawings, a grand piano is shown, wit

11 and post 12. The power the its the frame 11 and by a motor 14 pianos or other init is extremely desirable that no vibrations incident to the operation of the power to the sounding vibrations tend port the pump 13, and audible vibrations may plant be transmitted board of the piano, as such to destroy production of the music, provides vibration absorbing the, effective re- This invention means to supthe motor 14 so that not be set up in the receptacles Patented. June 14, 1921.

Serial No. 208,759.

piano as the result'of operation of its power lant.

Herein the pump 13 is mounted'betwcen the post 12 and a part of the frame 11, as shown in Fig. 1. "The pump frame is provlded with supporting members 16 affixed to the pump casing. These S PPOrts enter 17, which'ar'e mounted on the frame of-the player instrument. The holes in the receptacles are of greater size than the supports '16, and these supports are surrounded by a vibration absorbing material 18, which is preferably"madeof a suitable felt. In Fig. 3 it is shown that=the supports are entir y---surrounded b v the felt. The receptacle 17 incloses the felt 18 and the supports with slight press'ure "so that slidng of the sup orting members in the felt 1S permitted. y insulating the supporting members with felt, the vibrations due to the operation of the pump are largely absorbed and therefore not transmitted to the piano.

Under normal conditions the frame of the pump, as represented by 13, tends to move against the supporting post 12 by reason of the belt or equivalent connection with the motor, and in order to prevent the pump frame from moving into contact with the supporting post 12, vibration absorbing member or felt stop 24 is placed between the pump frame 13 and post 12 as shown in *ig. 1. By such a means of insulation substantially all vibrations of the pump 13 when, under operating conditions, are prohibited from being transmitted to the frame of the player instrument.

The motor 14 is provided with a bracket 19 and supported on rods 20 which in turn are supported by the members 21 attached to the frame 11 and post 12. The supporting rods 20 are run through felt bushings 22 in the ends of the bracket 19. The ends of the rods 20 are surrounded by felt pier-cs 23, as shown in section in Fig. 4. and thereby the vibrations incidcnt to the operation of the motor are prevented from being trans mitted to the sounding board of the piano in such a way as to set up audible vibrations therein.

Means may be sition of the motor relatively to the pump for the purpose of tightening the driving belt the same being herein shown as a wedge 25 having a vibration absorbing means 26 mounted on its inclined face. The wedge is slidably mounted on the supportingpost 12. The Wedge may be held in any position by suitable binding apparatus; preferably a plate -27 mounted on the post 12, and having a slot 28 therein which allows a stud 29 to move in the slot and to be tightened when the wedge is in propel-position, the stud being adapted to scre'iv'int'o the Wedge. I i l It is to be understood that the present invention may be variously modified andembodied within the scope of :the subjoiued claims. r Y

I claim as my invention:

1. Supporting means for an electric motor comprising, in eombination, .a yoke atfixed to the motor casing, said-yoke beingprovided with bosses bored at right angles to the armature shaft of the motor; a pair of rods passing through said bosses: vibra-' tion absorbin bushings 'for said bosses; supports for the ends of said rods; and vibration absorbing bushings between said rods and said supports.

2. Supporting means for-an elertric motor comprising, incombination, a yoke affixed to the motor casing, said yoke being.-

. for slidably'supporting said motor from-said pump adapbed'to be slidabl; re-

ceived by said frame; vibration absorbing material interposed between'said extensions and said frame an electric motor; means 4 upon -'sa id frame; vibration absorbing material in-.

terposed'between the motor supports and Ftherframe; and means including vibration ---absorbmg.means.for spacing said pump and motor upon opposite sides of a central frame member.

In testimony whereofxI have signed my name to :this specification this 20th day of December, 1917.

- GUY MANLY nUssELL.

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