US1390238A - Phonograph-horn - Google Patents

Description

UNITED STATES PATENT OFFICE.

EDWARD c. owl m, or GRAND RAPIDS, MICHIGAN, AssIciNon TO SOVILLA OWEN, or

' GRAND RAPIDS, MICHIGAN.

rHoNoGRArH-HoRn'.

I wa ers.

Specification of Letters Patent.

' Application filed March 30,1920. Serial No. 369.968..

To all whom it concern:

Be it known that I, EDWARD C. OWEN, a.

the following 'tobe a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to makeand use the same.

This invention relates to phonograph horns, and is particularly concerned with a novel construction of amplifying horn which may be built into very small compass yet at the same time give a perfect tone with an elimination of all metallic sounds. The horn is especially designed for use in phonographs which may be built into the compass ordinarily occupied by the depth of a suit case, and is of a form and shape to give an extra long travel of the soundwaves. from the tone arm to the lips of the horn with a resultant softening and mellowing of the tones, while the shape of the horn is such that the motor of the phonograph may be received and nested within one-of the curved means of connection of the tone arm of the phonograph to the horn, this connection eliminating metallic and tinny sounds such as are many times present.

For an understanding of the invention and the construction embodying the same,

reference may be had to the following description, in connection with the accompanying drawing, in which: igure 1 is a front view of the horn. Fig. 2 is a side elevation thereof. Fig. 3 is a rear elevation, and Fig. 4 is a horizontal section taken through the horn between the top and bottom thereof, and looking in a downward direction a Like reference characters refer to like parts in the different figures of the drawing.

Patented Sept. 6,1921.

In the construction of the horn, a bottom I 1 of rectangular form is provided, this not only furnishing the under side of the horn but also a bottom or side of the phonograph case. The top 2 of the horn lies a distance above the bottom land is curved gradually upward to its front edge as shown. The

sides 3 and 4 complete the horn so far as the outer structure is concerned.

Side" 3 is formed into almost U-shape with legs 3 opposite side l which is formed of two parts located substantially at right angles to each other and connected by a smooth .eurv'ed portion, the part 3 of side 3 substantially paralleling the opposite portion of the side 4 as shown. The space indicated at 5. bounded by the side 3 serves as a convenient place in which to locate the motor of -the phonograph. f

A dividing partition is located vertically from the rear end of the horn to adjacent the front end, lying substantially midway between the sides 3 and 4 and paralleling the same substantially. This partition terminates about one quarter of the length of the horn back of the front edges thereof as shown.

The tone arm 7 'of the phonograph passes downwardly through the motor board 8 and its lower enlarged end 7 is secured to a block 9 of wood which has an openin therethrough in alinement with the passage in the tone arm, said opening communicating with an opening made in the upperside or top 2 of the horn. The rear end of the horn is closed by a block 10 which, on its front side is downwardly and forwardly. curved to direct the sound waves into the throat of the horn and out at either side of the partition 6. I

A phonograph 'horn as thus constructed has proven particularly practical and serviceable in use. With it, a phonograph may be made which in height is no more than the depth of the ordinary suit case, the height of the front opening in the horn being approximately four inches in practice. ,The outward angular flare of the portion 3 of one side of the horn gives the required on largement for the outer end of the horn for amplifying purposes, and at the same time, the horn is not reduced in length, and a. necessary space left for the installation of-the motor, all tending to the greatest compact ness possible. The division partition 6 serves to clarify the tones, serving as a separator andsounding board and as an absorber' of cross tones which would ordinarily conflict and make confusion of tone. The invention 'is defined in the appended claim and I consider myself entitled to all modiward the front, an outer side comprisingtwo portions lying substantially at right angles to each other and connected by acurved portion, an inner side of substantially U-shape,

the outer portion of which is flared out at said partition extending from the rear end of the horn forwardly toward the front of the horn, a blockclosing the rear end or" the horn, and a second block' attached to the upper side of the born at the rear end thereof, said second block and upper side of the horn having alined openings therein, substantially as described. j

In testimony whereof afiix my si nature.

EDWARD C. OW'EN

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