US1361164A - Phonograph-horn - Google Patents

Description

E. A. LEU; PHONOGRAPH HORN.

APPLICATION FILED FEB. 51,1920.

Patented 1110.119211.v

2 SHEETS-SHEE 2.

F sgfnl EDWARD A'. LEETQ".

Naw-YORK, N. Y., AssreNoaTo MIRRORPHON TALKING MACIINE COMPANY, Il'C.,` 0F BROOKLYN, NEW YORK.

rHoNoeRAPH-HORN.

` To all whom t may concern.'

iBe' it known that I, EDWARD A. Lijn'r, a citizen ofgthe United States, residing at New York, in the county and State of New York, have .invented certain new and useful a Improvements in Phonograph-Horns, of

which the following is a full, clear, and eX-A act specification.'

This invention relates to phonographs, and particularly to horns or amplifying passages therefor, vand has for its object 'to provide a horn and'tone arm Which'will f produce la louder, purer and clearer tone than previous constructions, and. at-the same timeto reduce the cost of manufacture of .such-parts" so that 'the` phonograph may be l-sold 'to the public for less money than those now on 'the market.

The invention contemplates the useof ordinary commercial strawboard for the construction of the horn and tone arm, I having discovered that when made of. such mal' terial,l which is non-resonant, rigid and adapted to vibrate, the tone' is .greatly 1mmeant the inability togive out vibrations' proved. Vhile strawboard is preferred, any other non-resonant, rigid and vibrating -material may be employed Without departing from my invention. By 4non-resonant is audible tothe human ear Whenthe material lis broughtinto contact with sound vibra--j tions. lipusingseveral thicknesses-cime marian with @svi-imacorrigaions..

which occur duringth'e passage of the sound WaVeS 'hIOiflv thginstrumenuthereby pro du'cing a greater volume of sound. By cor-- rugating or otherwi'sebreaki'ng upthe'inner surface of the horn and tomarm, 4more echoes are produced during' the passage-otu the sound Waves therethrough, thereby fur.-

ther inceasingthe volume of sound.l lThe construction of the'instrument ofno'n-reso; nant, rigid material, as eXplamed,gives the necessary strength or intensity to the volumel of sound, vvliile' thedesiredsizeor Jfullness,-

which must'b'p'resent with the strength or. intensityin--ordelf'to'produce the -maximum increase i u volume, may be obtained by coating the sound conducting passages of the horn and tone Vfarm -with a. resilientsubstance, such as shellac, Wet-glue or liquid belt dressing ivhich will remain-sticky or Specification of Letters Patent.' *I

III-iii of Fig. 2.

.. rigidity ments.

Patented Dee. 7, 1920.

Application' mea February 5, 1920. serial No. 356,482.

viscid for an indefinite period. A-further and Avery important advantage of the pres Q ent construction is that the entire sound passage is free from anything which might audibly vibrate during' the passage of the sound -Waves therethrough, so that the resulting quality of tone is an exact reproduction in timbre of the original voice, instrument, combination of voices or instruments, or Whatever made the sound recorded ,on the record.

. The invention Will ,now be described in lconnection with the accompanying drawings, which constitute part of this specification, and then more specifically defined in the claims at the endof the description.

-In theaccompanying drawings, wherein similar reference charactersare used to designate corresponding parts throughout the several views Figure lis alfront elevation of a phonograph constructed ina preferred manner and containing a hornvand tone arm made substantially in accordance with this invention. i

Fig. -2 is a 'central vertical section taken on the line II-II of Fig. 1.

Fig. 3 is a horizontal section on the line Fig.v 4; is a horizontal section taken on the line IV-IV of FigK 2. f

vFig. 5 is a detailed vertical section of the combined horn and tone arm drawn to a larger scale, and

6 is a section-on the line VI--VI of...

Fig. 4, showing the connection of the soundbox to thetonearm. L In Figs. l to 4, inclusive, of the drawings,-

`1 'designates al cabinet having its Walls, par-. ti'tions and doors preferably madeof-.straw board,'each of vsaid walls, etc., being made,l

pup oftwo thicknesses of smooth stra vvboard .2 and 3 separated bya layer of corrugated stravvboard 4 in order to obtain the desi-ted combined with' lightness., 'The number of thicknesses or layers of straivf boardfas well as the formation of said lay#4 ers may, however, be varied to suit requlre- The vcabinet lmay be divided about mid- Way of'its height byl a' transverse horizontal partition: ,thespace below said par-- tition being usedpreferably for' .the storage of records and: for' thai'v lpurpose vfitted with ,resonant,quality/thereof 1V any suitable form or rack or the shelves 6. Access may be had to said storage compartment 7 by means of doors 8 which may be hinged to the opposite sides of the cabinet and fitted with knobs 9. In; theupper portion of the compartment,4 7, just below the partition 5, there are placed two drawers 10 and '11 which have knobs o1` pulls 12 and may be"'1`ed for the storage of needles or 10 styliises, sound boxes, or the like. 'The dra-,wer 11 may be made shallower than the drawer 10, and behind said drawer 11 may Ibefarranged a box 13, Fig. 2, for holding the motor (not shown). The crank 14 for '15 winding the motor is passed through the side of the cabinet and may be unscrewed from the winding spindle in4 the usual way.

The space in the cabinet above the partition 5 is preferably divided into two compartments by a partition 15 extendingI rear-- wardly from "the front of the 4cabinet nea-r the top thereof downwardly and rearwardly to the partition 5 near the back of the cabinet. v The compartment l16 below and in front of said partition 15' contains the turntable 1T mounted on the projecting spindle 18 of, the motor, andthe tone arm 19 which is a part or continuation of the horn 20 and has the sound box 21' attached thereto in anyv suitable manner, as by the tubular extension 22 of said sound box frictionally'engaging a rubber gasket 23 fitted in an opening v24 in the end of the tone arm. The portion of the tone arm which merges into the horn extends through a slot 25 in the partition 15. The compartment 16 may be closed by doors 26 suitably hinged or otherwise -mounted on the cabinet and provided with hand knobs.

27. lVhen the doors are closed all sound of scraping of the needle on the record is shut in so that it is not audible to the listener during the playing of a record.

' One or more electric lamp bulbs 28 may be supported in the upper portion of the compartment 16, Fig. 2, so as to throw light on the turntable and facilitate'the changing of records and needles. Said lamp or'lamps may be supplied with electric current from any suitable source in any suitable manner,

as by a dry battery 29 through circuit wires W69, containing..a.sutablesivi-tch31PM-MMM V. 1 As best shown in Fig. 5, the horn and tone 'iwalls thereof being composed of two thick- V,nesses or layers 32 and 33 of smooth strawiboard spaced apart by transverse members- ,534 to form an air chamber 35, and an inside layer of corrugated strawboard 36. The inner surfaces of said horn andtone arm are gcoated at 37 with the resilient substance already mentioned. The provision-of the air chamber or cushion around the horn and ltone arm increases thc desirable resiliency tof saidA parts as (yelliis yimproves the non- .Xarm are made integral or in one piece, the

The horn and tone arm are supported to swing freely both vertically and horizontally by a double hinge compensating .device .38. comprising vertical members 39 and 40 hinged together by a flexible strip of cloth '41, or the like, a pair of horizontal members- 42 and 43 hinged together by a similar ilexible strip 44, and a cradle 45 embracing the lower portion of the horn. The vertical' member 39 is secured to the back of the cabi-1 net in the compartment '46 back of the partition 15, while the horizontal member 43 carries the horn embracing cradle 45. The vertical member 40 and horizontal member 42 are rigidly connected togetherpreferably by the diverging arms 47. 'A resilient support 48,`preferably a coiled'spring, .is attached at one end'to the mouth of the horn and at the otherend to the vertical member 4() for yieldingly retaining the uppery end portion of said horn-in proper position and l so that it may follow the movements of the lower portion thereof and the tone arm on the double hinge support.

The compartment'46 may have additional walls 49 within the main walls of the cabinet 1 to increase the rigidity and resiliency of thiscompartment.. In the walls of the cabinet above said additional walls 49 openings 50are formed for the escape ofthe sound waves, and said openings are preferably covered. on the inside with silk as at 51, Fig. 2. A piece of similar material 52 is also 'stretchedacross the topof the compartment v 46 above the openings 50. Said 'silk coverings are designed for masking the horn and excluding dust.

- lVithin the top of the compartment 46 there is a ledge 53 to' which a dome shaped cover 54 is hinged at 55 and on-which it is supported when closed. The silk piece 52 may also be attached to this ledge, preferably to the under edge thereof.. At one side ofv said ledge a rack 550 may be provided to c0- operate with a prop 56 pivoted to the cover andadapted to be adjusted with its free end in any one of the notches of the rack for supporting the cover at any desired angle as suggested in dotted lines in,Fig.`2. .In Fig. 4, 57 indicates the usual speed controlling lever for the motor, said lever projecting from bei low the edge of the turntable.

The cabinet structure and the compensating doublehinge support for the horn are claimed in 4separate'applications filed herewith.

Having thus described my invention, what l'. claim as new and desire to secure by Letters Patent of the United States is i; 1. A phonograph horn having a smooth wall and a corrugated wall arranged with the ridges between its corrugations against 1,551,164 l e" I rugated wall arranged with the ridges bephonographs having spaced inner and outer tween its oorrugations against the inner surwalls and a corrugated lining for the inner face of the inner smooth Wall. l Wall.

3. A phonograph horn having spaced 6. An integral horn and 'tone arm for f15if 5 inner and outer walls, and a corrugated linphonographs having a vsmooth Wall and a ing for the inner wall. corrugated wall arranged with the ridges b e- 4. A phonograph horn having spaced intween its corrugations aains't the inner surner and outer walls, and a corrugated lining face of said smooth wa Y v for the inner wall coated with a-resilient su'b- In testimony whereof I have signed my' 20 10 stance for the purpose speciied. name to this specification. 5. An integral horn` and tone arm for EDW. A. LEET.

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