US1400985A - Phonograph-amplifier - Google Patents

Description

J. A. RAYDER.

PHONOGRAPH AMPLIFIER. APPLICATION FILED JAN. 17, 1921 Patented Dec. 20, 192i,

3 SHEETSSHEEY 3.

INVENTOR r e d u a R A h a w W my;

ATIORNEY WITNESS:

drawn to a reduced scale,

Application filed. January 1'7,

T'o {ZZZ whom it may concern Be. it known that L'Josnrrr RAYnnn, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented new and usetul Improvements in Phonograph-Amplifiers. of which the following is a specification.

This invention relates to phonographs or talking machines and it has more particular reference to cabinets therefor. the main object'being to provide a cabinet withwhich is combined an extensible horn, said extensible horn being so constructed'and arrangedthat when in use it is properly sup ported while an uninterrupted flare is pre sented for the amplification of the sounds reproduced by the travel of the tone arm over the recordr Another object of my invention is to provide a combined phonograph cabinet and extensible horn whereby the volume and distinctness of the sounds produced are greatly enhanced.

A further object of this invention is to provide a. novel means associated with the amplifier or extensible horn whereby the tones or sounds reproduced from. the record are more evenly distributed and at the same time greatly clarified in quality; in other words an important feature resultant to my novel construction of amplifier and er; tensible horn is that the customary metallic sounds associated with phonographic rcpro-- ductions is practically eliminated.

ll ith the foregoing primary and other objects in View as will later on become more apparent as this description proceeds my invention consists essentially in the novel features of construction, combination and arrangement or" parts hereinafter fully described and more specifically defined by the appended claims.

In the further disclosure of thd invention reference is to be had to the accompanying sheets of explanatory drawings constituting a part of this specification, and in which like characters of reference designate the same or corresponding parts in all the views.

4 Figure 1- is a side elevation of my im proved phonograph cabinet and extensible amplifier or horn, partly broken away and in section to better disclose the extensible horn in collapsed or closed in position.

2 'is a front elevation of the cabinet Specification of ti yersal 33."

r 1g. side elevation to Fig. 1, out tensible ampllner or horn in tully extended position.

iig. 18 a sectional plan taken approxiitely on the line in the preceding Fig. a front view looking directly into the inner section of the extensible aniplitier or horn and drawn to an enlarged scale; and, M

Fig. 6 is a detail side view hereinafter more particularly Referring now more particularly to the drawings the numeral 10 designates the phonograph cabinet generally which supported on feet ll. and divided into upper and lower compartments 12. 13 respectively. the latter of which is provided with spaced shelves 14. for the storage of records. side doors l5 furnishing a closure thereof. The upper compartment 12 is closed in by a cover or crown It; provided with a'surrminding lip 17 wherebya dust-proof joint is insured, and the back 18 of said upper conipertinent is rabbeted and made removable for the purpose hereafter explained. Hinged doors 19 close in the front of the upper com partment l2.

Arranged within the upper compartment 12 a box-like structure 20 conveniently rectangular in conlig ration and said st .lcture is of dimensions to be a sliding fit be tween the side walls 21, runners 22 being provided for cooperation grooves 23 where by the box-like structure 20 is guided as well limited in its movement. Supporting legs having appropriate casters 25 thereunder are fitted beneath the front of the box-like structure 20 for supporting same wherrin extended position as shown in Fi 3, and it is to be particularly noted that when the said structure 20 is in closed position the legs Ell lie snugly against the front of the cabinet pletely close in the front of the box-like structure within the upper compartment 12.

Supported within the box-like structure 20 beneath the tor 26 of appropriate pattern and the spin die 27 thereof supports the turn-table 28 on which the record 29 is placed.

The tone arm proper comprises trio sections 30, 31, ill former of which carries reproduce mile said sections are con nected together a knuckle joint or uni= supported by a horizonta disof a part defined.

upper wall thereof is the moposed brace 34 conveniently secured to the side walls 21 is a depending elbow section 35 which is flanged at its upper part to house a ball or antifriction bearing 36 for the inner end of the tone arm section 31 and at the lower end of said elbow section- I attach the inner portion 37 of an amplifier as by a flanged connection 38. ThlS 1nner portion 37 is preferably flared outwardly from a circular end where it is connected to which comprises a dished member 40 pro- .vided with a threaded shank 41 for adjustable engagement in the wall of the aforesaid elbow section 35', said dished member 41 being tesselated or corrugated at 42. To

' each of the tesse'lations or corrugations 42 on the dished member 41, I attach the inner end of a tone conveying wire or string 43, the free end whereof is connected to an ap propriate key or peg 44 passing through the 'aforesald clrcumscribing band 39 and outer end 37 of the amplifier portion 37, and it will be readily understood that in this'manner I provide a simple and effective means whereby the strings 43 can all, be accurately tuned to the requisite and same pitch whereby the sound waves traversing the tone arm sections 30, 31, and elbow 35 when reproduction is taking place will be evenly distributed about and around the amplifier por 'tion 37 use of the distributing means just described Furthermore, I find that by the the usual metallic tone is to all ordinarily discernible purpose entirely eliminated, while the tonal effect is considerably enriched and rendered more approximate to the sounds recorded.

Built into the aforesaid box-like struc-- ture is the mouth or outer portion 45 of the amplifier and it is made of a cross section conformin ner ampli er section 37, so that when said gradual amplification of sound results as will be clearly understood by those skilled in the art to which this invention appertains.

In use and assuming the cabinet is closed up as shown in Figs. 1 and 2, the user first opensthe doors l9, and draws out the boxlike "structure 20-which is supported by the legs 24:to its full extent as shown by Figs. 3 and 4. A record 29 is placed on the turntable 28 and the tone arm section 30 swung out from the position shown in dotted lines in Fig. 4 to the full line position shown in Figs. 3 and 4. The motor 26 is started and it will be readily seen that reproduction from the'record 28 will take place in the ordinary and well known way, with the added advantages'of increased amplification of sound, and due to the employment of the strings 43 an enhanced and clearer tonal effect will result.

l/Vhile I have described and shown the best known form of my invention at present known to me I wish it clearly understood that various changes and other combinations thereof may be readily' evolved to adapt said invention to different types and forms of talking machines, and it is intended to hereby include all such reasonable modifications as fairly fall within the scope of the appended claims.

Having described my invention what I claim as new and desire to secure by Letters Patent isgj- 1. In a phonograph, an amplifier, strings disposed about its inner surface and means for adjusting said strings simultaneously.

2. In a phonograph,-an amplifier, a dished member adjustably mounted at the inner end of' the amplifier, pins at the outer end.

thereof and strings having their ends connected with the dished member and the said pins.

- JOSEPH A. RAY ER.

to the outer end 37 of the in In testimony whereof I afiix my si nature.

Images