US1735283A - Gramophone - Google Patents

Description

NOV. 12, 1929. w s HQY 1,735,283

GRAMOPHONE Filed Aug. 13 1926 10 5 FIGJ 8/ arr.

Patented Nov. 12, 1929 UNITED STATES HENRY WILLIAM SEW HO Y, OF DUNEDIN, OTAGO, NEW ZEALAND GRAMOPHONE Application filed August 13, 1926. Serial No. 129,013.

This invention relates to mechanically operated musical instruments commonly known as gramophones, phonographs and the like, for reproducing sounds.

The object of my invention is to eliminate vibration, by providing an amplifier having the advantages of a full floating horn in that the outlet of the tone arm is inverted in or der to render the cabinet housing the said tone arm, and the horn applicable to a combi- I at about the centre of vibration of the top and bottom of the amplifier, and between it and the top and bottom of the sound box, as inclicated in the accompanying drawings.

Referring to the drawings accompanying '25 this specification,

Figure 1 is a perspective view of a combination gramophone and dinner waggon constructed in accordance with my invention.

Figure 2 is a sectional plan view through 302-2 in Figure 1.

Figure 3 is a sectional elevation through 33 in Figure 1.

There is a cabinet preferably composed of eight sides, 1, 1A, 1B, 1C,1D, 1E,'1F, 1G, the 5 sides 1A, 1B, 1C, 1D, 1E, forming permanent sides of the cabinet, and support at their upper and lower extremities the top 2 and bottom 3 respectively. The top and bottom extends sideways on'either side of the cabinet to be rigidly supported by means of the columns 4:. On either side of the cabinet are the super-imposed shelves 5 made fast at one end -to the cabinet and at the other to the column 4. The bottom 3 is mounted on suitable castors 6 and handles 7 are attached to either end of the top 2, making the cabinet portable.

The cabinet is divided horizontally into three compartments. The bottom compartment 8 houses the motor 9 and may be probase bar 22.,

vided with fittings for storing disc records.

The central compartment 10 houses the rotating disc 11 and tone arm 12 of themachine. Three of the sides namelyl, 1G and 1F of the central compartment 10 are hinged at 13 to the cabinet to open for the convenience of getting at the tone arm 12 for inserting needles, and to replace records on the rotating disc 11.

The upper compartment 14 contains the horn or amplifier, which has the advantage of a full floating horn,'the inner end 150i which is bent at right angles'to project downwardly through the partition 16 between the upper compartment 1 1 and the central compartment'lO, the hole in the partition 16 being large enough to ensure clearance for the said downwardly projecting part 17 of the horn. The end of the downwardly projecting part 17 is connected to the inverted tone arm 12,which is suitably suspended to enable it to swivel in the ordinary manner.

" The horn is composed preferably of thin timber and comprises four sides, a top 18 and a bottom 19 slightly bent along the length of the horn, the convexity formed being on I the inside thereof. There are two sides 20 and 21 which embrace the top and bottom 18 and 19 on either side to form a rectangular shaped horn or amplifier; the mouth of the said horn embracing the three sides 1, 1F, and 1G of the cabinet which sides are operable upon hinges to open or/and to close.

A base bar 22 is disposed within the compartment 14 and is adapted to liealong the top of the amplifier between the top 2 of the cabinet and the top18 of the amplifier, and is gluedv or otherwise secured in place to rigidly support the said top 18 of. the amplifier. A sound post 23 placed perpendicular to the base bar 22 at about the centre of gravity of the top 18 of the amplifier is in contact with the top 2 of the cabinet and the There is a sound post which is prefer ably adjustable and provided with a threaded portion 25, which is adapted tofit an internally threaded hole in the partition 16.

the bottom 19 of the amplifier at about the The portion 26. is adapted to press against cent-re of gravity thereof and is necessarily perpendicular to the said bottom 19. An octagonal head fashioned on the said adj ustable sound post is provided for adjusting the post to add or/ and lessen the tension upon the bottom 19, for the purpose of toning the amplifier. The sides 1, 1G, and 1F,of the top compartment 14 are preferably of ornamental design having fretwork panels lined with silln'gau ze or the like materials, and the sides and '2-1 of the amplifier may be also ornamented with fretwork or have a monogram cut therein to act in a certain degree as a sounding board when the space at the rear of the horn, which is embraced by the five sides 1A, 1B,1C. 1- l ancl 132, of the cabinet, may be rendered to some value as an ampl fier,

lVhat I claim as new and desire to secure by Letters Patent is-; o

1. A sound-reproducing machine, compri ing a cabin havi g a l gat d base, a corresponding top, pillars rising from the base and supporting the top, upper and lower shelves arrangedin spaced relation to each other and to the top and bottom to provide lower, intermediate and upper spaces, the

shelves being connected to and supported'by the pillars, a vertical wall extending from the bottom of the cabinet to the lower shelf and formed in part to provide doors, said wall defining a lower compartment of the full width but of less length above the bottom, a wall extending from the intermediate 5 to the upper shelf and" formed to provide doors, said last named wall forming an intermediate compartment aligned with and corresponding in sectional dimensions to the lower compartment, a motor housed in the lower compartment, a turn table mounted in the intermediate compartment and operated by the motor, and an amplifier secured between the upper shelf and the cabinet top, .a means for varying the tone of the amplifier mounted in the upper shelf and bearing against the amplifier, and a reproduce-r in communicationwith the amplifier and arranged in the intermediate compartment.

2. A sound-reproducingmachine, comprising a cabinet having an elongated base, a corresponding top, pillars rising from the base and supporting the top, upper and lower shelves arranged in spaced relation to each other and to the top and bottom to provide lower, intermediate and upper spaces, the

shelves being connected to and supported by the pillars, a vertical wall extending from the bottom of the cabinet to the lower shelf and formed in part to provide ,doors,'said wall defining a lower compartment of the full width but of less length above the bot tom, ,a wall extending from the intermediate to the upper shelf and formed to provide doors, said last named Wall forming an intermediatecompartment aligned with and corresponding in sectional dimensions to the lower compartment, a motor housed in the lower compartment, a turn table mounted in the intermediate compartment and operated by the motor, and an amplifier secured between the upper shelf and the cabinet top,

said amplifier having a width at its outlet my ha HENRY WILLIAM ,SFEVV HOY.

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