Abstract of
GB156333
156,333. Marks, E. C. R., (Newcombe, W. H.). Oct. 7, 1919. Sound magnifying and directing appliances. - The internal horn of a talking machine, shown in elevation in Fig. 1 and in plan in Fig. 3, is rectangular in cross-section and comprises a flat base 1 gradually increasing in width towards the horn mouth, two vertical sides 2, 3 increasing in height towards the mouth, and a curved or sloping upper wall 4. The neck tube 7 is vertical and an oblique reflector 8 is placed in the corner opposite the neck. The vertical side walls 2, 3 may be concave outwards, instead of plane.
1. A talking machine sound amplifver, rectangular in cross section and coimprising, a flat side gradually increasino in width to the full width of the amplifver; sides at right angles to said flat side and increasing in width towards the greatest width of the amplifyer; a side connectino the last mentioned sides, situated directly opposite said flat side; a mouth piece opening in to the small end of the amplifyer directly opposite said flat side; and a flat surfaced fillet in the cross angle below said mouth piece and on said flat side, substantially as described.
2. A talking machine sound amplifyer, as claimed in Claim 1 wherein the sides at right angles to the said flat side increase in width by a regular curve towards the greatest width of the amplifier, substantiallv as described.
3. A talking machine sound amplifver.
as claimed in Claim 1 wherein the sides at right angles to the said flat side increase in width by having rectilinear sloping edges towards the greatest width of the amplifver, substantially as described.
Dated this 3rd day of December, 1919.
MARKS & CLERK.
Redhill: Printed for His Majesty's Stationery Office, by Love & Malconison, Ltd.-1921.
615
Description
PATENT SPECIFICATION
I, EDWARD CHARLES ROBERT MARES, of 57. & 58, Lincoln's Inn Fields, London,
W.C. 2, Consulting Engineer, do hereby declare the nature of this invention (a communication from abroad from William Henry Newcoombe, of Karangahape Road, Auckland, New Zealand, Picture Framer) to be as follows:The present invention relates to improvements in hornless talking machines.
The object of the invention is to provide in hornless talking machines means whereby an increased amplification of the sound is produced.
According to the invention the usual form of box situated below the sound producing mechanism has fitted within it a chamber of rectangular cross-section. The top of the said chamber is preferably formed by a portion of the inner top of the box structure. The lower part of 156,333 the chamber is preferably constructed as a sloping bottom whose width increases from one end to the other. The tube conveying the vibrations enters the chamber 25 opposite the fiat bottom.
If desired, the bottom portion may be constituted by part of the bottom of the box structure. The two sides adjacent the bottom which complete the chamber 30 of rectangular section that gradually increases in sectional area, curve or slope outwardly.
At the smaller end of said chamber the bottom corner is provided with a curved 35 fillet or other filling in piece whereby the sound is reflected from the sound tube towards the mouth or larger end of the chamber.
Dated this 7th day of October, 1919. 40 MARKS & CLERK.
COMPLETE SPECIFICATION.
Improvements in Hornless Talking Machines.
I, EDWARD CHARLES ROBERT MARES, of 57 & 58, Lincoln's Inn Fields, London,
W.C. 2, Consulting Engineer, do hereby declare the nature of this invention (a communication to me from abroad by William Henry Newcomnbe, 'of 157.
Karangahape Road, Auckland, in the Provincial District of Auckland, in the Dominion of New Zealand, Picture Framer), and in what manner the same is to be performed, to be particularly described and ascertained in and by the following statement:-
56 This invention relates to amplifiers for hornless talking machine of the type fPnce li-I which is rectangular in cross section having a flat side which gradually increases in width, sides at right angles thereto and increasing in width and a 60 side connecting the last mentioned sides, with an entrance or mouth piece at right angles to the first flat side.
Amplifiers of the above mentioned type are known in which a curved neck or 65 passage connects between the throat or mouth piece and the amplifier. Also an amplifier having two side members that first decrease from the mouthpiece end and then increase in a curved manner to 70 the outlet, has been proposed which was Application Date: Oct. 7, 1919. No. 24,490/19.
Complete Left: Dec. 3, 1919.
Complete Accepted: Jan. 7, 1921.
PROVISIONAL SPECIFICATION.
Improvements in Hornless Talking Machines.
156,333 fitted with a flat sound reflecting surface set at substantially 45 degrees in the corner below the said mouthpiece.
The present invention consists in an amplifier for a hornless talking machine of the type first referred to which is provided at the angle below the mouthpiece with a flat surfaced fillet piece.
An amplifver constructed according to IG this invention not only materially amplifies the volume of sound but also serves as a factor or influence in the correct recording or reproducing of musical tones with their true and full values.
1-3 After considerable experiment it has been found that a particular shape of sound chamber gives results vastly superior to that obtained from sound chambers of other shapes.
The chamber is fitted into the interior of a hornless talking machine and connected in the usual manner to the recorder in substitution of the chamber at present in use.
The amplifier receives the vibrations of the recorder through a tube which coinmunicates with the mouth piece and opposite a flat side thereof, the said flat side gradually increasing in width to the full width of the amplifver. The sides adjacent to the flat sides increase in width either in a regular curve or by a slope and the fourth side of the amplifyer is connected to the previous two sides. A fiat surfaced fillet is placed in the crossangle below the mouthpiece and on the said flat side.
The amplifyer is rectangular in cross section and can be constructed of wood, metal, concrete or any other material, as different effects can be obtained by the use of different material.
Referring to the drawings:-Figure 1 is a side view, Figure 2 an end view and Figure 3 a plan view of one form of the amplifyer, while, Figure 4 is a side view, Figure 5 an end view, and Figure 6 a plan view of a modification.
In the illustration 1 represents the flat side which gradually increases in width from the small end of the amplifyer until it is equal to the full width of the latter.
The sides 2 and 3 at riglht angles to the side 1 increase in width towards the amplifyer's greatest width either by regular curves 4, Figures 1 and 2, or are sloped as shown at. 5 in Fiures 4 and 5.
The side 6 opposite the side 1 connects the curved or sloped edges of the sides 2 and 3.
The mouth piece 7 is located at the small end of the amplifver, and enters the latter at right anoles to the flat side 1.
A flat-surfaced fillet 8 is provided in the cross angle below said mouth piece 7 and on the flat side 1.
Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I
