US1648432A

US1648432A - Sound reproducer for phonographs and the like

Info

Publication number: US1648432A
Application number: US60028A
Authority: US
Inventors: Daniel R Wells
Original assignee: Individual
Current assignee: Individual
Priority date: 1925-10-02
Filing date: 1925-10-02
Publication date: 1927-11-08
Anticipated expiration: 1944-11-08

Description

Nov. 8, 1927.

D. R. WELLS 1,648,432

SOUND REPRODUCER FOR PHONOGRAPHS AND THE LIKE Filed Ot. 2, 1925 3 Sheets-Sheet l lll lll ||||||||1 11| H Nov. 8, 1927.

D. R. WELLS SOUND REPHODUCER FOR PHONOGRAPHS AND THE LIKE ,Fim @en a, 1925 s sneets-snee-z .Zff .4. 32 f2/3Q f/ f C' F' 732 l e zwi Nov. 8, 1927.

D. R. WELLS SOUND REPRODUCER FOR PHONOGRAPHS AND THE: LIKE Filed 051;, z, 1925 J5 Sheets-Sheet 5 a. wv

Patented Nov. 8, i927.

entren sr 'EES DANIEL Bi. /VELIJS, 0F BEADNG, PENNSYLVANIA.

SOND BEPRODUCER FOB PHONOGRAP-S AND THE LIKE.

Application filed. Getober 2, 1925.

This invention relates to an amplifier for sound reproducing or regenerating machines or devices, and which is more especially intended for use on phonographs and more particularly in reproducing musical records, but the essential features of which may also be used in connection with radio sound reproducers.

Itis well known that many sound boxes or horns at present in use in connection with the devices such as are above referred to give out harsh or metallic sounds, and it is also known that in the reproduction of musical records some notes are very imperfectly reproduced while, in some instances, some ne or delicate notes are hardly reproduced at all. This invention has for its object to obviate the objections just referred to by furnishing a sound reproducer or amplifier which, particularly in the reproduction of musical records, will give out the sounds of the instruments or voices perfectly, just as they were originally produced, preserving the original timbre of the instruments or voices. This object is carried into effect by the use of a resonatoror amplier consisting wholly of wood, and which is preferably mounted within a wooden case or cabinet. The resonator or amplifier, in its preferred form, comprises spaced-apart and partly open walls, and the case or cabinet preferably comprises spaced-apart double walls, the outer walls being preferably of open work or skeleton form, all as will hereinafter more fully appear.

In the accompanying drawings Fig. 1 is an elevation of a case or cabinet constructed in accordance with the present invention. Fig. 2 is a plan View of the same, with the cover omitted, showing the resonator or amplifier within the case or cabinet. Fig. 3 `is a detail view showing a special form of the bottom of the cross member of the resonator or amplifier. Fig. l is a sectional elevation on line 4 4, Fig. 2. Fig. 5 is a central longitudinal section on line .5-5, Fig. 2. Fig. 6 is a sectional elevation on line 6-6, Fig. 2. Fig. 7 is a cross section of the resonator or amplifier on line 7-7, Fig. 5. Figs. 8 and 9 are elevations of the inside walls of the case or cabinet. Figs. 10 and 11 are detail views showing the connection of the stylus holder with the reso: nator or amplifier.

Referring `to the drawings, the case or cabinet as' herein shown comprises lmitside Serial No. 60,028.

walls 12 preferably of `fretwork or openwork construction, as shown 1n Fig. 1, and inside walls 13. The inside and outside or double walls of the case or cabinet are spaced apart from each other and are connected together at intervals by blocks 14 and the cabinet is preferably mounted on a stand 15 having suitable legs 16, the cabinet being preferably raised slightly from the stand by blocks or strips 17 of cork, felt or other nonvibratory material. The inside walls 13 of the case or cabinet are preferably provided with narrow slits 13ZL to increase the resonance, these slits being disposed in different ways and any suitable number thereof being provided.

Mounted within. the cabinet is the usual turn-table 18 to receive the records and which will be operated in any suitable or usual manner by a motor within the housing 19. .Supported on a suitable frame 2O within the case or cabinet is the resonator or amplifier which takes the place of the usual tone armand horn of a phonograph, this resonator or amplifier consisting` of a longitudinal member 21 and a cross member 22. The side walls of the longitudinal member' are spaced apart from each other, as more clearly shown in Figs. 2, and 7, these spaced-apart walls being connected at intervals at the top and bottom of said member by vertical cross strips 21a, thus affording a hollow member of partly openwork. construction. The side walls of the said longitudinal member 21 are provided at the portions thereof registering with the cross member 22 with a series of holes 21". Also, the said side walls of the longitudinal member preferably have thinned out portions 21c of irregular shape and at irregular inter-V vals. The top of the cross member 22 is preferably provided with slits 22 which are shown as being straight, but which are not necessarily so, while the bottom 22b of said cross member is provided with a series of slits 22c which are preferably shaped and positioned to indicate the outline of the larger part of a violin. These slits increase the resonance of the thin wooden parts. The top and bottom walls of the cross member 22 of the resonator or amplifier are preferably of varying thickness, tapering as shown in Fig. 7.

The top and bottom walls of the cross member are spaced a art and connected t0- getheivat their outer sides byv strips or pieces 22", and these top and bot-toni Walls being also connected at the inner parts of said members by small bars or props 22e.

The stylus bar 23 connected with cross piece 24.- preiferably glued to disks 25 oit' cork, felt or linen sot Within thinned-out portions of the side Walls of the longitiidinal meniber 2l ot the resonator or ampliiier, said stylusbar being preferably mounted between adjusting screws 26 tapped in lugs 2' on rcominodate itself to the record and may also be swung aside when a record is l'to be placed on or removed `from the turn-table. The said resonator or amplifier may, ii desired, be .properly balanced on its pivot 3l by a suitable Weight, as 32, oit lead or other heavy material.

lt Will be noted that all the parts oit the oase lor cabinet and oi the resonator and ampliiier are of thin Wood or veneer, these parts being preferably attached together by glue, thus providing a construction which Will have great resonance Without emitting harsh tones, as has been demonstrated in practice,'and capable of reproducing musical tones running from 32 to 5,000 vibrations perl second. By constructingand mounting the oase or cabinet and the resonator or ampliiier as shown and described the entire structure as shown in F l and 2 becomes a vibratory resonant body.

One of the side Walls of the longitudinal member 2l of the resonator or amplifier is preferably o'l.3 hard Wood, as maple or birch,

and thefother side Wall is preferably of relativel sott Wood, as red-Wood or fir. ln both of these walls the grain ot the Woot runs lengthwise the member. The upper and `lower Walls oi the Cross member 22 olif the resonator or ampliiier are preferably olf soit Wood, as red-Wood or tir, with tho grain olf the Wood ruiming orossivise oit the longitudinal member 2L The invention is not to be understooil as heilig-limited to the particular constructions heroin shown a d described, as these may be varied Widely Within the province oit mechanical skill without departing troni the sfcope ofthe invention as deiined by the Claims hereunto appended. i i

`Having thus described my vinvention l claim and desire to sec-ure by Letters Patent: lIA resonator or' amplifier, :tor phonographs ortho l.ilre,'i0rmed Wholly ot Wood Vand "Comprising hollow' llongitudinal and .cross vmembers each having thin walls, said longitudinal member having partly open top and bottom parts, and said cross member having partly open sides and ends.

2. A resonator or amplifier, for phonographs or the like. icornied Wholly of Wood and comprising vhollowl longitudinal and cross members each having thin iva ls, the cross member extending out on both sides of the longitudinal member, l

Y 3. A resonator or ainplitier, v"for phonographs or the liken formed Wholly o't yWood land comprising hollow longitudinal and cross members each having thin Walls, the

Cross member extending out on vboth sides oi the longitudinal member, one of the side Walls of said longitudinal member being oit hard Wood and Vthe other'wall being of relatively sott Wood, withV the'grain of the ivood of both Walls'running lengthwise of said longitudinal member.y

1l. A phonograph having a resonator oi' amplifier formed wiolly of Wood and oomprising hollow longitudinal and cross ineinhers, each having` thin walls, and a stylus'bar connected With the said longitudinal member.

5. A phonograph having a vresonator or ampliiier formed Wholly oi' Wood and coinprising hollou7 longitudinal and cross members each having thin Walls, anda stylus bar Connected With the Ysaid longitudinal memlber.,the upper and loi'ver Walls of saidr cross member being provided with slits to increase the resonance.

`6. A phonograph comprising a oase =hav ing thin, double, Wooden Walls the outer of which is of openivorlr construction, said Walls being connected together at intervals, and a resonator or ainpliiier mounted in said oase and also having lthin Wooden Walls and to which resonator or amplifier al stylus bar is attached.

7. A phonograph comprising a case having thin, double, Wooden Walls the outer ot Which is or openwork eonstruetiomsaid Walls being connected together at intervals and a resonator or amplifier mounted in said case and also `having thin Wooden Walls and to which resonator or amplifier a stylus bar is attached, said r-sonator or ampliiierconsisting oi? hollow longitudinal and eross inembers the former carrying said stylus bar.

t?. A phonograph comprising a oase :having thin double, ivooden Walls, theoiiter ot ich Yis of yopenwoigli eonstriiotion, and a resonator or annpl-ier mounted vWithin .Said

' oase and havingthin Woodeiiwalls g'avliereby a structure -Whiehv is fivliolly"vibratory is provided; Y 9. A phonograph comprising ease lhaving thin, double, wooden' walls, the outer of l which is of openworlr construction, and@ resonator or .amplier `mounted within said oase and havmg thin -Nvooden wa-11s,

resonator or amplier eonsietin'g of longitudinal and cross members of openwork construction; whereby an entire vibratory strueture isprovided, and a stylus holder carried by said longitudinal member.

10. A phonograph comprising a oase having thin, double, Wooden Walls, the outer of which is of openworlr construction, and the inner of which is provided with slits, and a hollow resonator or amplifier mounted Within said case and having thin Wooden Walls; whereby a structure which is Wholly vibratory is provided.

. 11. A phonograph comprisingy a ease-having thin, double, Wooden Walls, the outer of which is of openwork construction, and the inner of Which is provided with slits, and a hollow resonator or amplifier Within said case and having thin Wooden Walls, said resonator or amplifier consisting of longitudinal and cross members of openvvork construction; whereby an entire vibratory structure is provided, and a stylus bar carried by said longitudinal member. v

In testimony whereof I ailiX my signature.

- DANIEL R. WELLS.