US1668051A - Tone harmonizer - Google Patents

Description

May 1, 1928.

- J. B. CRAIG TONE HARMONIZER Filed July ll, 1925 Patented May 1, 1928.

V UNITED STATES JOHN B. CRAIG, 0F CASTLE ROCK, COLORADO.

TONE HARMONIZER.

Application filed July 11, 1925. Serial No. 42,930.

This invention relates to improvements in tone harmonizers, and is more particularly adapted to a device which may be readily and easily attached to the throat portion of the tone arm of a graphophone for the purpose of softening the tones before the same are emitted from the amplifier or horn of the graphophone, and at the same time producing a clear and harmonious tone.

Another important object of the invention is to provide a device of the above mentioned character which is simple in construction, inexpensive, strong and durable and further well adapted to the purpose for which it is designed.

Other objectsand advantages of this invention will become apparent during the course of the following description taken in connection with the accompanying drawing.

In the accompanying drawing forming a part of this application and in which like numerals designate like parts throughout the same:

Figure 1 is a side elevation of the tone harmonizer embodying my invention, showing the manner in which the same is attached to the throat of the tone arm of a graphophone, and being disposed within the cabinet.

Figure 2 is an enlarged longitudinal sectional view through the tone harmonizer.

Figure 3 is a sectional view taken approximatelyon line 3-3 of Figure 2, and

Figure at is a top plan view of the device.

In the drawing wherein for the purpose of illustration is shown the preferred embodiment of my invention, the numeral 1 designates generally a cabinet of any conventional type of graphophone, and extending downwardly into the cabinet is a throat portion 2 of the tone arm 3. Adapted to be attached to the throatof the tone arm at the open end thereof, the smaller rear end of my improved tone harmonizer designated generally by the numeral 4t.

My tone harmonizer com rises a substantially rectangular cross sectional casing which includes the top and bottom 5 and 6 respectively, the side walls 7 and 8, and a front wall 9. As is clearly illus rated in the drawing, the side walls have their upper edges gradually tapering toward the rear end of the casing from a point adjacent the front end thereof and furthermore the side walls gradually converge toward their smaller rear ends. The top and bottom walls 5 and 6 respectively will also gradually taper toward their rear ends for cooperation with the tapering or converging side walls so that the rear end of the casing is substantially smaller than the forward end. Fur thermore, the top wall 5 terminates at a point adjacent the front wall 9 so as to provide a sound emitting passage 10.

An elongated strip of brass or other similar material extends longitudinally within the casing 4 and is secured on the bottom 6. lhis strip is indicated at 11 in the drawing. Extending upwardly from the strip 11 at spaced intervals are the lugs 12, the same being slotted vertically for receiving and supporting th brass strip 13, the sane extending substantially transversely within the casing of the tone harmonizer, and these strios are in the path of the sound entering the smaller end of the casing from the throat of the tone arm. The purpose of these strips is to reduce vibration as well as the sharp tones emitted from the tone arm and the throat which is associated therewith and extends downwardly into the cabinet 1.

The top wall 5 of the casing has formed therein a series of slots 14, the same being arranged in staggered relation with respect to each other and the provision of the slots provides a means for accommodating the resonators 15, the same extending vertically through the various slots and downwardly into the casing 4-, the upper ends of these resonators being provided with suitable openings such as are shown at 16, and through which extends the wire 17, the latter being secured at its respective ends on the outer face of the top wall of the casing so that the resonators will be suspended from the wire through the slots and disposed within the casing in their proper positions. As is clearly illustrated in Figure 2, the resonators increase gradually in length from the rear to the forwardmost one. The ressonators and the brass strips 13 cooperate to obtain full and harmonious tones which are emitted through the passage 10 at the top of the forward end of the casing 4, and from where it enters the cabinet 1 and leads the same through the forward open face thereof. For further obtaining the fullness in the tone, a bell 18 is arranged in the forward end of the casing, the same being secured to the front wall 9 in any suitable manner.

- The tone harinonizer embodying the present invention is preferably constructed of wood and the wooden casing will take care of reed and other string instruments except a piano which is cared for by the wood and metal, the brass strips and the resonators taking care of the band instruments, vocal music, whereby the tone will be properly blended, and the fullness and harmonic effect will be obtained.

A device of the above mentioned character may be readily and easily attached to the throat of the tone arm of a graphophone and will not necessitate any material alterations with respect to the cabinet in which the tone harmonizer is adapted to be disposed when associated with a graphophone. V

While I have shown the preferred embodiment-of my invention, it is to be understood that minor changes in the size, shape and arrangement of parts may be resorted to with out departing from the spirit of the invention and the scope ofthe appended claims.

Having thus described the invention, what I claim as new and desire to secure by Letters Patent is il. "The combination with a phonograph including a cabinet provided with a tone arm, the throat of which extends into the cabinet; of a tone harmonizer comprising a casing having a top and a bottom, said casing being arranged within the cabinet and communieating at its rear end with the throat of the including-a cabinet provided with "a tone 1 ends to the top of the casing,

arm, the throat of which extends into the cabinet, of atone harmonizer comprising a casing having a top and a bottom, said casing being arranged within the cabinet and adapted to communicate at its rear end with the throat of the tone arm, the forward end of the casing being provided with a sound emitting passage, the top of the casing being provided with a series of transversely extending slots, a plurality of resonators-extending downwardly through the slots into the casing, the upper ends of the resonators being provided with registering openings, and a securing wire extending therethrough and adapted to be attached at its respective 3. The combination with a phonograph including a cabinet provided with a tone arm, the throat of which extends into the cabinet, of a tone harmonizer comprising a casing havinga top and a bottom, said casin'g being ar anged within the cabinet and adapted to'communicate at its rear end with the throat of the tone arm, the forward end of thecasing being provided with a sound emitting passage, the top of the casing being provided with av series of transversely extending slots, said slots being disposed in staggered relation with respect to each other, a plurality of resonators extending downwardly through the slots into the casing, the upper ends of the resonators being provided with registering openings, a securing wire extending through the registering openings in the upper ends of the resonators and adapted to be attached at its respective ends to the top of the casing, said resonators increasing gradually in length from the rear one to the forwardmost one.

In testimony whereof I affiX my signature.

JOHN B. CRAIG.

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