Патент USA US2060287код для вставки
Nov. 10, 1936. I F. .1. DOFSEN ‘ 2,060,287 SOUND RECORD AND PROCESS OF PRODUCING THE SAME Filed May 29, 1935 F'IIS__IL__ ' INVENTOR. F/OS/O’ ./. 00/3627 ATTORNEY. ‘2,060,287, Patented Nov. 10, ‘1936 UNITED STATES PATENT ‘ OFFICE SOUND RECORD AND PROCESS OF ‘ PRODUCING THE SAME Floyd J. Dofsen, San Francisco, Calif. Application May 29, 1935, Serial No. 23,983 ’ 4 Claims. (01. 274-43) This invention relates to a sound record and a - process of producing a sound record for use'in small reproducing mechanisms, such as novelties, especially those in which the sound record takes 5 the form of a tape of ?exible material. . An object of my invention is to produce tape sound records in large quantities economically. Another object of my invention is to produce a sound record in which the‘matrix for producing 10 the-record is not unduly distorted during its nor mal life. 1 ' An additional object of my invention is to pro vide a sound record which has a, raised sound track thereon. 15 ' . A further object of my invention is to provid a process of producing a sound record which will I afford a raised track without utilizing an excess of material. ' The foregoing and other objects are attained in 20 the embodiment of the invention illustrated in the drawing, in which- ‘ Fig. 1 is a side elevation, partly in section, of a small sound reproducer incorporating the sound record of my invention. 25 ‘ Fig. 2 is a diagram to illustrate the process of my invention. . Fig. 3 is a cross-section of the tape within the forming rolls. ' ‘ Fig. 4 is a cross-section of my sound record on 30 an enlarged scale. The sound record of my invention preferably comprises a strip of ?exible material, thereby pro viding' a tape, which has a displaced portion the projecting part of which carries a sound track and 35 the depressed portion of which‘is substantially ‘complementary to the raised portion. The proc ess of my invention includes producing such sound record by the simultaneous impression of a sound track on a displaced portion of a tape while the 40 tape is soft, and subsequently permitting the im ' pressed and displaced tape to harden for use. The sound record of my invention is useful in very widely varying environments, but is espe speed over the record, vibrations of the diaphragm 9 are produced, so that audible signals emanate from the aperture 1. Usually a short sentence is impressed upon the sound record l2 and is re-_ produced each time the userjretraces his thumb-,- 5 nail over the sound track. - ‘ ' In accordance with my invention, I preferably provide that the sound record l2 be constructed of celluloid or comparable ?exible material, in the shape of a relatively long, narrow, ?at strip. 10 The tape so formed is preferably provided withan upstanding ridge l3 extending longitudinally of the tape and located centrally between the sides thereof to afford lands l4 and I 6. The ridge I3 is generally rectangular in cross-section and up- 15 stands from the general plane of thelands l4 and I6 in a predetermined amount I‘! which in one in stance is approximately ‘4/1000ths of an inch. The upstanding ridge l3 on its face carries un dulations l8 which represent the sound waves and together constitute the sound track, generally des ignated l9. ' - . In accordance with my invention I preferably displace the material for the upstanding ridge [3 by providing a complementary groove 2I' on 25 the opposite face of the tape I2, which groove is substantially rectangular ‘ in cross-section and corresponds almost exactly to the ridge l3, ex cept for the fact that the height 22 of the groove is ‘substantially more than the height of the" 30 ridge IS, in one practical instance being approxi mately 6/ 1000ths of an inch. The resulting dis placed central portion 23 of the tape is conse quently of lesser thickness than either of the side portions beneath the lands l4 and I6. - 35 In accordance with my invention, I preferably provide my sound record by a process especially, illustrated in Figs. 2 and 3. As shown in these ?gures, a strip 26 of celluloid or comparable ma terial, of sufficient width to provide a plurality 40 (for instance, twelve) of ?nished sound records, is immersed in a bath 21 of warm water, so that the material is softened. The strip 26 is then fed between a pair of rolls 28 and 29, which turn upon their axes at the‘ same rate but in opposite 45 ‘directions. The upper roll '28 is provided with a circular-cylindrical contour, having a sound dis- . depressed portion 3| in which are anchored the persing aperture 1 in the front face thereof and ends 32 of an electrolytically formed sound die a small aperture 8 in the rear face or diaphragm 33. This die in cross-section is 'a thin sheet of 50 9 thereof for the reception of the knotted end ll metal, usually copper, carrying the complement 50 of a sound record l2. For operation, the box 6 of the sound track thereon in a groove 3!, which is held between the thumb and fore?nger of a is duplicated or varied for each of the plurality ,user, who grips therecord l2 between the index of strips with which it is intended to contact. ?nger and the thumbnail of the opposite hand. . The die 33 is wrapped around the roller 28 and 55 When he advances his thumbnail at a constant is con?ned between side ?anges 35 and 36 on 55 cially applicable for use in conjunction with a .45 novelty or small sound reproducer such as is shown in Fig. 1. The device includes a box 6 of 2 2,060,287 the roller 28, which hold the die accurately in position. The roller 29 on its periphery is pro vided with ridges 38, in contour corresponding to the grooves II, and being provided one for each of the plurality of records. The softened tape is fed through the rotating rollers 28 and 28, beginning with the beginning of the die 33, and simultaneously the central por tion of the record or tape is displaced to provide 10 the central portion 23' and the sound track I9 then knotted to form an anchor II for use in the device shown in Fig. 1. ' I claim: 1. A sound record comprising a strip of ?ex ible material having a straight longitudinal ridge of uniform width projecting from one side there of and bearing the sound track, and a straight longitudinal groove on the other side thereof in substantial registry with said ridge. 2. A sound record comprising a ?exible tape 10 is impressed in the surface of each of the rec having its central portion offset from the side ords. Since the pressure between the rollers is portions thereof to form an elevated rectilinear con?ned to the central portion 23 of the tape, . rib of uniform width with the sound track on there is no tendency to stretch or otherwise ‘dis 15 tort the thin die 33 which otherwise would be the case after protracted use. The die 33 is therefore useful almost inde?nitely. During the impression the heat contained in the warmed and softened tape is imparted to '20 the relatively cool rollers 28 and 29, so that simultaneously, or substantially so, the displaced and impressed tape is hardened. As they emerge from the rollers 28 and 29, or subsequently if desired, the individual sound records are out apart at the places indicated by the broken lines 31 in Fig. 3 to provide the individual sound rec ords as illustrated in Fig. 1, each of which is said projecting central portion. 3. A sound record comprising a ?exible tape 15 having a ridge of a predetermined height and width on one side thereof bearing‘ the sound track and having a complementary groove of lesser height on the other side thereof. 4. The process of producing a sound record which ‘comprises advancing a tape to receive the sound track, and simultaneously impressing a sound track of ?xed width on one side of said advancing tape and impressing a complementary groove having said ?xed width on the other side 28 of said advancing tape. FLOYD J. DOFSEN.