US2491037A

US2491037A - Metal player for sound record tape

Info

Publication number: US2491037A
Application number: US674203A
Authority: US
Inventors: Floyd J Dofsen
Original assignee: Individual
Current assignee: Individual
Priority date: 1946-06-04
Filing date: 1946-06-04
Publication date: 1949-12-13
Anticipated expiration: 1966-12-13

Description

INVENTOR.

F LOYD J DoF'sE:N

M Ms v E f .T T MA F. J. DOF SEN METAL PLAYER FOR SOUND RECORD T APE Flled June 4, 1946 Dec. 13, 194-9 Patented Dec. 13, 1949 UNITED STAT ES PATENT OFFICE 2,491,037 METAL PLAYER FOR SOUND RECORD TAPE Floyd J. Dofsen, San Francisco, Calif. Application June 4, 1946, SerialNo. 674,203

An object of my invention is to provide a metal player primarily designed for reproducing sound from a sound record metal tape. In my patent, 2,060,287, issued November 10, 1936, on a Sound record and process of producing the same, I disclose a metal tape with sound recordings thereon, this tape being connected to a sound transmitter in which one wall constitutes a diaphragm for making the sound recordings audible when the operators finger nail is moved over the side of the tape having the sound recordings.

In the present invention I provide a metal player to take the place of the fingernail, and the player is designed to receive the tape and the operator's fingers can press the player against the surface carrying the sound recordings as the player is moved along the tape. The tape may have any desired sound recordin formed thereon and the particular construction of the tape can take the form shown in my patent above referred to.

The metal player is designed to be stamped out from sheet metaland to be cut and shaped by a blanking and forming die. In this way the metal player can be cheaply constructed and sold at a low price. The metal player has novel means for causing the tape to vibrate in accordance with the sound producing undulations as the player is moved along the tape, these vibrations being transmitted to the diaphragm of the sound transnutter.

The inventionis extremely simple in construction and permits a better sound reproduction to be made from the tape than is possible with the use of the finger nail alone.

Other objects and advantages will appear in the following specification, and the novel features 0! the device will be particularly pointed out in the appended claims.

Figure l is a side elevation partly in section of a small sound transmitter and shows the metal player receiving the sound record tape and being moved therealong, the tape in turn-having one end attached to the diaphragm wall of the sound transmitter or reproducer;

Figure 2 is a diagrammatic view of the metal player on a greatly enlarged scale, the metal tape being received in the player;

Figure3 is a transverse section taken along the line III-III of Figure 2; and

Figure 4 is a plan view of theblank from-which the metal player is formed, the blank being shown .on the same enlarged scale as in Figures-2 and 3.

While I have shown only the preferred formv of L my invention, it should be understood that various changes or modifications may be made within the scope of the appended claims without departin from the spirit and-scope of the invention.

3 Claims. (Cl. 274-41) In carrying out my invention, I provide a small sound transmitter or reproducer indicated generally at A in Figure 1. The sound reproducer may be in the form of a box having a diaphragm wall I and a front will, in which an opening 3 is provided. The box has a cover 4- that car ries a flange 5 designed to enter the box interior as illustrated in Figure 1. The dash line position of'the cover 4 shows how'the'cover can be opened when-it is desired to place the sound tape 3 and the metal player 0 in the box. 'The box has tabs 6 that are folded under the cover when the latter is closed.

I do not wish to 'be'c'o'nfined to any particular type of sound reproducer or transmitter because it is possible to use "a diaphragm without an box or sound directing compartment associatedtherewith. Thediaphra'gmihasa slot 1 through which an end of the sound record tape B is fed and the tape is held against accidental withdrawalby a knots tiedin the tape'end which is received within the sound reproduc'er A.

.As already stated, the metal tape B may be of the type shown in my Patent 2,060,287, although it may comprise any flexible strip made of any material that has sound recordings 9 formed in one side thereof. 'In my copending application, Serial No. 652,092, filed March 5, 1946, on a Method and apparatusl'for proportionately enlarging a sound track, I disclose one means ofma'nufacturing the tape. The present invention pertains to the metal player which is used for vibrating the tape-and t'ocausethe latter to vibrate the diaphragm i to er'nitthe desired sounds.

The metal player is indicated generally at C and I will first describe the shape of the blank from which the metal player is formed. The blank isillustratedin Figure 4 and it will be noted that it is T-shaped. The blank has a stem or main body porti'on'lll and a cross bar I l. The free end of the stem is made circular as shown at 12, and this circular portion has a projection [3 formed at its center. The projection is elongated and extends in the same direction as the longitudinal axis of the stem. A portion of the stem which is disposed close to the cross bar is slotted at M and this slot extends through a greater distance than one-half the length of the stem and provides two relatively thin resilient arms I5 that function in a manner hereinafter .described.

The crossbar l l-has-accentral portion that is "providedwith a curved edge It which is designed to be aligned with the curved edge l2 when the metal playerstem 10 is bent into its final looped shape. At the center :of the crossbar, I provide fifl qf the stem. When thestem is bent back upon 3 itself to form the looped shape shown in Figure 2, the projections I3 and I! will oppose each other.

The ends of the crossbar have pairs of wings I8-I8 and I9--I9. In Figure 4, the dash lines 20 and 2I at the bases of the wings I8 and I9, respectively, indicate the lines of fold. The wings are bent at right angles to the plane of the cross bar and when thus bent form guide channels D and E for the tape as illustrated in Figure 2. The circular end portion I2 indicated in Figure 4 has dash lines 22 that coincide with the sides of the stem I0, and a dash line 23 that extends at right angles to the lines 22, these lines indicating Where the metal is to be bent.- The circular portion I2 is bent slightly along these lines, as illustrated in Figure 2. The bending is such as to form a slightly cup-shaped cavity for the portion I2, so that the operators finger F when placed in this portion, as shown in Figure .1, will have little tendency to slip ofi from the metal player as the finger is used for sliding the player along the tape. The stem I0 is folded back on itself substantially atits mid-portion so that the circular end I2 will overlie the mid-portion of the cross bar II. The flexible arms I5 permit the stem to be bent in the manner shown and will give a resil-l iency to the circular portion-I2 for causingit to spring away from the cross bar I I when the finger F releases its pressure on this portion. The slot I4 is'disposed nearer to the cross bar H than to the circular portion I2 in order'to provide a nonperforated stem portion Ina that is disposed adjacent to the circular end I2. Such construction gives a larger non-perforated surface against which the finger F can press.

Figure 1 shows the actual size of the metal player and it will be seen that the portion Illa is small in area, althoughit will provide sufiicient breadth for the finger to. rest against. The wings I8 and I9 when bent at right angles to the cross bar complete the forming of the metal player. The circular portion I2 will be positioned between the guide channels D and E. The slot I4 extends slightly beyond the bend or loop I4a so that the resilient arms will form the loop Ma.

From the foregoing description of the various parts of the device, the operation thereof may be readily understood.

'will face each other and this will permit the tape to be placed in the guide channels with the sound recordings}; facing upwardly or downwardly. If the sound recordings face upwardly the projection I3 when pressed against the tape and moved 'therealong will cause the tape to vibrate and should the sound recordings face downwardly, the -'projection I! will cause the tape to vibrate and 'transfer the vibrations to the sound transmitter.

The sound reproducer or'transmitter A is held in one hand as indicated by the hand G in Figure 1, while the metal player C is held in the other hand. The metal player is moved along the tape from a position adacent to the diaphragm wall I to the free end of the tape. During this movement the portion Ifla is pressed firmly down upon the tape and kept in this position throughout the entire movement of the player along the tape. .The vibrations produced by the player moving over the sound recordings are conducted by the tape to the diaphragm wall and will cause the diaphragm wall to vibrate in the same manner. The diaphragm in vibrating will pulsate the air disposed adjacent thereto for causing sound waves to be projected through the opening 3 of the front wall. In this Way the sound reproducer A becomes a talking box should the recordings 9 be such as to produce words. Any manner of sound can be reproduced by the tape and metal player.

I claim:

1. A metal player for a sound record tape comprising a T-shaped member having a cross bar and a stem, the stem including upper and lower portions interconnected by a loop, the upper portion having a free end overlying a central portion of the cross bar, the ends of the cross bar having guide channels for guiding a sound record tape between the central portion of the cross bar and the free end of the stem, the stem being resilient for permitting the free end thereof to be yieldingly pressed down upon the tape.

2. A metal player for a sound record tape comprising a T-shaped member having a cross bar .and a stem, the stem portion including upper and lower portions interconnected by a loop; the upper portion having a free end overlying a central portion of the cross bar, the ends of the cross bar having guide channels for guiding a sound record tape between the central portion of the cross bar and the free end of the stem, the stem being resilient for permitting the free end thereof to be yieldingly pressed down upon the tape, the central portion of the cross bar and the free end of the stem having cooperating projections that register with and extend toward each other to ride along the tape as the player is moved over the tape, the guide channels being aligned with the projections for centering the tape with respect to the projections. I

3. A metal player for a sound record tape and made of resilient material and comprising a T- shaped member having a cross bar and a stem, the latter including upper and lower portions interconnected by a loop, the upper portion having a free end overlying a central portion of the cross bar, said stem having a longitudinal slot extending through the loop so as to increase the resiliency of the stem at the loop, the free end 'of the stem and the centralportion of the cross bar being spaced apart to slidably receive a sound record tape therebetween, the central portion of the cross bar and the free end of the stem hav-- ing cooperating projections that extend toward each other to ride along the tape as the player is moved over the tape.

FLOYD J. DOFSEN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Great Britain Jan. 5, 1938