US1468138A - Phonograph - Google Patents

Description

Sept. 18 1923. v

H (I). CRIPPEN PHONOGRAPH Filec: Nov. 17 1921 2 Sh aetsSheet l Sept. 18, 1922 1,468,138

iFifKPPEb-i Filed :"m 17-, 1921 2 Sheets-Sheet 2 I generally improve phonographs or so-called Patented Sept. 18, 1923.

HERBERT O. CRIPPEN, 0F SANFQRIJ, FLGRIBA.

rnonccnsrn.

Application filed November 17, 1921. Serial No. 515,896.

To 07511110111 if mny concern Be it known that I, Hammer 0. GRIPPEN, a citizen of the United States, residing at Sanford. in the county of Seminole and State of Florida. have invented certain. new and useful Improvements in l honographs, of which the following is a SliPClllCetiliOll.

This invention relates todmprovements in phonographs.

One of the objects of the invention is to talking machines.

A more specific object of the invention is to provide an improved amplifying casing or horn containing a double tone chamber.

.-\n0ther object is to provide an improved casing, enclosing a tone chamber, which is responsive to the high and to the low notes with utmost fidelity, and which is resonant to an extent that it increases the volume or tone and reenforces all tones, equally vihrating in the same time.

Another object is to provide a vibratable casing enclosing atone chamber and another relatively rigid spaced away casing enclosing. the vibra'table casi leaving a sealed space intervening: bet can the two casings. to thereby provide a resonant chamher outside of the usual sound amplifying horn.

Another object is to provide a sound responsive casing containing a tone chamber and means to tension the chamber, thereby to make it more sensitive to normally in audible sound emanating from the amplify ing casing or horn.

Another ob ect of the invention is to im} prove the cabinet and arrangement of the horn and sound reproducing instrumentality to render scratching of the needle less apparent.

Other objects and advantages of the in vention will hereinafter appear.

In the drawings z- Fig. l is an isometric perspective view of the double casing sound amplifier and modifier containing an inner and an outer tone chamber showing: parts in section.

Fig. 2 is a front elevation of an improved cabinet in one side of which the improved devices are to be contained. 1

Fig. I is a section taken'on line' 3-3 of Fig: 2-.

Fig. 4 is a Fig. 8,

section taken, on line 4-4 of The inner Fig. 5 is a longitudinal section of the born or amplifier with the closed and sealed tone chamber, on the vertical sides only, be- 7 ing omitted from the top and bottom".

Fig. 6 is longitudinal section of the modification of the device shown in Fig. 1.

Iii-all the views the same reference charac ters are emploi eti to indicate similar parts.

The amplifying and improved resonant s n in Fig. 1 and several of the consists of themner casing i enclo will 10 is preferably made of close grain well seasoned spruce, ine, or other suitable responsive material. he casing 10 is not unlike that which usually is used in the best of rphonographs, and may he made of any material best adapted for the purpose. The vibratable casing 10 is surrounded by an outer casing 12 spaced away therefrom to enclose an outer tone chamber 13. The outer wall 12 is preferably thicker than the wall 10 and is made of thoroughly seasoned maple or otherhard wood to afford a, substantially non-vibras-B table backing to reflect the sound into the inner chamber 11. The casing 10 vis provided with openings 14 which may be of any suitable shape, in the form of a scroll as shown, or in any other suitable form thru 8 which the vouter tone chamber 13 communicates with the inner tone chamber 11. The inner wall 10 of the inner casing is tensioned by means of the tone posts 15 which are placed between the walls 10 and*12, and which hold, the former wall under tension just as a similar tone postis placed in a violin to render it more sensitive to sound vi-.

bration.

The two casings, 10 and 12, are sealed to- 9 gether at their ends, at 16 and as at 17, and in some instances to the side wall 10 is open into the interior ottherfmie chamber ll; thus the sound vibration, or Waves of sound, are passed thru the wall of the 10 (member 11 into the outer tone chamber 13, and the waves of sound, or tone, are greatl k magnified and thrown back in increased v0 ume into the inner tone chamber by the resonant effect of the outer tone chamber and the casing wall between the chambers.

01: course the size of the device and thickness of thematerial may be varied to suit other conijhions that may present themselves. The voice and other sounds are 11- the violin, cello, harp, piano, -and otherin-' struments are reproduced in natural tones entirely eliminating the faults heretofore present in phonographs;

In'the modification shown in Fig. 6 there ,are in the outer tone chamber 13 between strings 18 secured to the end piece 16 and tensi'oned by the screws 19. There may bein this chamber as many strings, suchas violin or guitar strings, as may be desired that will vibrate in harmony with the cusing 10, the sound produced thereby being projected by the back wall 12 into the eham- The strings Jet 11, thru the openings 14. 18 may be tuned to different pitch from the wall 10 and from each other, and they may be of dilterent sizes, so as to be responsive to sound'of varying pitch to be projected into the inner tone chamber 11. i

The cabinet containing'casing 20, shown in sect-ion in Fig. 3, has a floor 21, below which the motor for rotating the turntable 22 is situated. The tone arm 24 is provided with a downwardly projecting support 25 the' arm is movable.

pro ect1ng part 27 that 18 in free unobstructwhich is pivoted at 26 about which pivot It-has an upwardly ed eommunieation with the throat 28, connccted to the smaller end of the horn or tone chamber 11, as at 29. Vhen it is desired to put a needle 30 in the sound box 31 the structure may be moved on the pivot 26 a sutticient distance, laterally off the record that is superimposed fromthe table 22.

The front of the chamber containing the turntable 22 and the -tone'arm 24 is normally open, as at 32, capable of being closed by the closure 33, which is hinged at 34 and which is capable of being moved back into the dotted line position, clearly shown, forsound that will be projected from the tone chamber 11.

In Fig. 5 I have shown a difl'erent form of closure for the tone chamber 11 consistingot a curtain. The curtain 40 is contained on a spring roller tfand may be made of suitable tabric, thru which the sound \v1ll issue to some extent, although the curtain maybe entirely placed over the full opening of the chamber 11. The roller 41 may operate as a window curtain roller with a suitable pawl and ratchet device by which the curtain 40 may be raised to any extent or entirely removed from the front of the casing 10.

The cabinet 20, shown in Fig. 2, may have another compartment for containing records and which maybe closed'by a curtain 42 whichis similar to the curtain 37, as more clearly shown in Fig-3. The curtain 37, shown in Fig. 3, may also be drawn to the lower extremity of the opening in the cabinet 20 in a manner similar to the curtain '42 shown on the opposite side f the cabinet, so that both openings in the cabinet may be entirely closed.

There is an uuol'istructed opening from the-tone arm thru the inner tone chamber and the tone chamber being above the operating needle and record 'the scratching produced thereby and the noise of the motor is not carried out thru the horn.

()ne of the addit onal advantages arising from placing the horn above the record carrying turntable is the availability of the solid top of the cabinet as a table.

.ivhile I have herein shown a simple -embodiment of my invention with suggested 'modifica'tions, it is manifest to persons skilled in the art, that considerable other variations may be made in the general arrangement and configuration of the parts,

within the scope of the, appended claim.

Having described my invention what I claim as newnnd desire to secure by LettersPatent, is:- w

' A sound amplifying device conun ising a thin, yielding, soulid-responsive. inner easing, providing a freely open chamber; an outer casing spaced trom the inner casing, said outer casing having thick, rigid walls substantially non-responsive to sound vi bra'tions providing a tone chamber between the casings, said intermediate chamber closed at its ends and means between the two casings to tension the thin inner casing.

In testimony whereof I hereunto subscribed my name.

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