US2130158A - Sound recording and reproducing device - Google Patents

Description

Sept. 13, 1938. A. RYSICK SOUND RECORDING AND REPRODUCING DEVICE Filed Dec. 21, 1952 Patented Sept. 13,1938:

UNITED STATES SOUND RECORDING AND DEVICE REPRODUCING Arno Rysick, Dresden, Germany Application December 21, 1932, Serial No. 648,245

, In Germany June 17, 1929 4 Claims.

The invention relates generally to sound rev cording and reproducing devices, and more particularly, to dictating machines adapted for the recording'and subsequent reproducing of sound by the use of a single machine.

' It is accordingly an object of the present invention to produce a unitary device operable to both record and reproduce sound impulses.

A further object of the invention resides in the provision of a machine of the class described, embodying separate recording and reproducing heads, adapted-to be selectively moved into engagement; with a recording disc by a single manipulative means.

Yet a furtherobject oi the'invention resides in the provision of a recording and reproducing machine embodying a turntable adapted to support a disc of recording material, a carriagemovable in a plane parallel to and spaced above the plane I of said turntable, and separate recording and reproducing heads operatively supported on said carriage and adapted to be selectively moved into or out of engagement with a disc on said turntable by means of a single manipulative device.

Other objects and advantages will be in part obvious and in part pointed out hereinafter.

The invention accordingly consists in the features of construction, combinations of elements, and arrangements of parts as will be exemplified in the structure to be hereinafter described, and the scope of which will be indicated in the following claims.

In the accompanying drawing, in which is shown one of the various possible embodiments illustrative of this invention. I

Fig. 1 is a fragmentary top plan 'view of a recording and reproducing device embodying a preferred form of the invention.

Fig. 2 is a fragmentary elevational view of the machine shown in Fig. 1.

Fig. 3 is an illustrative form of circuit arrangement which may be utilized in conjunction with electrical recording and reproducing in a machine of the,type described. Q

Fig. 4 is an enlarged detail view of a part of the structure shown in Figs. 1 and 2.

Corresponding reference characters refer to corresponding parts throughout the several views of the drawing.

As conducive to a clear understanding of the 'invention, it is pointed out that in combined recording and reproducing machines it is highly desirable to be able to readihr condition the machine for' either a recording or reproducing operation. In the present instance, such purpose is accomplished by providing, a manipulative means common to both the recording and reproducing heads, and effective to selectively en-' gage one or the other with a disc upon the machine, or in the alternative, to maintain both the recording and reproducing heads in their elevated or ineffective positions out o'f'engagement with the material of the .disc.

Referring now to-Figs. 1 and 2, a rotatable turntable is indicated .at iii, a vertically disposed 10 shaft ll, joumalled in any desirable manner in the housing. of the machine being adapted to support the turntable for rotary movement in a fixed horizontal plane.

A carriage l 2, is slidably supported for advanc- 15 ing and return excursions of movement in a hori zontal plane, on'spaced guide rods i3 and I4 rigidly supported at their respective ends in the frame of the-machine. In the present instance, the rod l3 lies substantiallyin the plane of the turntable l0 and may be carried in upward extensions of the side frames (not shown). A suitable bore, provided in'the carriage, is adapted to slidably receive the rod l3 and the lower portion of the carriage as shown particularly in Fig. 2, is bifurcated to form spaced parallel legs I5 and it which embrace the rod l4.

I Means is provided'to move the carriage, and in the present instance will be seen .to comprise a feed screw l1 suitably journalled in the side frames of the machine and arranged to be drivingly engaged with the carriage through the medium of a spring actuated segment ll pivotally supported upon a short shaft IS, the ends of which are carried in the legs I5 and it. In this connection it will suffice to point out that suitable provisionis 'made for engaging and disengaging the segment l 8 with the feed screw i1.

The carriage i2 includes a. horizontalfy extend- I ing portion 20, which overlies the surface of the 40 turntable Ill and operatively supports recording V and reproducing heads 2| and 22 respectively. The heads 2| and 22 are independently and joint- 1y movable in vertical planes and jointly movable in horizontal planes to selectively control engage- 4 ment' of one or the other with a recording disc 23, adapted to be carried on the upper surface of the turntable l0. To this latter end, the recording and reproducing heads are provided with rigidly formed and leftwardiy extending tubular portions 24 and 25 which are journalled in-pairs of similar, spaced parallel ears 26' and 21. The ea s 26 and 21 are formed integrally with a sub-carriage 2B movably supp r ed at the righthand end of the part 20, of carriage l2. A rightwardly extending plate 29, fixed to the under surface of the carriage is turned upwardly at to when its tubular part drops thereinto.

It will now be apparent that movement of the sub-carriage will function to selectively'permit either the recording or reproducing heads to engage a disc upon the turntable or to cause both heads to be held out of engagement therewith. Means are provided to move the sub-carriage with respect to the carriage proper and thus predetermine the particular one of theheads which is to operatively engage the surface, or, in the alternative, to maintain both heads in ineiiective position. i

In the present instance the sub-carriage, is actuated by means of a lever arm 33 pivotally supported intermediate its end in the part 20 of the carriage I! by means of a vertically disposed pivot pin 34. The forward end of lever 33 is suitably articulated to the sub-carriage 28, its rear end being provided with a pin 35 which rides in the cam slot 36 of a cylindrically shaped cam 31 join-nailed within the upper endof the carriage I! on an axis substantially parallel to those of the guide rods i3 and H. In the present embodiment of the invention, cam 31 is fixed to a shaft 38 one I end of whichas shown in Fig. 1, is pro'-'ided with an operating lever 39. It will be apparent that rotation of shaft 33 through the medium of lever 39 from the position shown in Fig.1, will function to rotate the .cam 31 thus imparting movement to the pin 35.01 lever 33 so as to move the sub-carriage and its articulated recording and reproducing heads downwardly as viewed in Fig. 1. The extent of this movement of the operating lever 38 will determine whether the recording head will subsequently be permitted to drop into the notch 32 or whether both' heads will be supported by the shoulder 3| of the part 30 of plate 19 so as to maintain both inineifective position.

As shown in Fig. 3, the recording and reproducing heads may be electrically comiected to a suitable amplifying means indicated generally at 40. A conductor ll ior example, is util zed to provide an electrical connection from the recording head ii to the amplifier, and a' conductor 42 similarlyconnects the reproducer 22 and the amplifying unit. A microphone 43 and loud speaker 44 are electrically connected with the amplifying unit through the medium of the conductors 45 and i6 and a conductor 41 may be connected to a suitable -source,.of electrical energy. A conductor 48 may conveniently be employed to provide an electrical connection from a source of energy to a turntable driving motor (not shown), and a switch 49 mounted on the amplifying unit panel is interposed in the power line to the driving motor. A second switch 50 may be arranged to control the electrical circuit to the recording and reproduc- .ing heads.

It will be seen that I have provided a simple and economically manufactured means for selectively controlling recording and reproducing heads to cause one or the other to operatively engage a disc upon the turntable ID, or, in the alternative, to effectively malntain'both'heads in inoperative position.

I claim as my invention:

1. Inc. recording and reproducing device, the combination of a rotatable record carrier, a carriage supported for movement in a plane parallel with and overlying the record carrier, recording and reproducingdevices operatively mounted on said carriage, a lever arm pivoted on said carriage and arranged to Jointly move said recorder and reproducer relative to said carriage in a plane spaced above the plane of the record carrier, means on said carriage to support the recorder and reproducer above and out of engagement with a record on said record carrier. and to permit downward movement of either the recorder or reproducer into engagement with a. record on said carrier'in a single predetermined'position, and manual means to actuate said lever.

- 2. In a recording and reproducing device, the

combination of a rotatable record carrier, a carriage supported for movement in a plane parallel with and overlying the record carrier, recording and reproducing devices operatively mounted on said carriage for movement relative thereto, a

lever arm pivoted on said carriage and arranged to jointly move said recorder and reproducer, a guiding ledge fixed to said carriage and underlying said recorder and reproducer, said guiding ledge serving to support the recorder and reproducer above and out of engagement with a record on said record carrier, and having a notch formed therein permitting downward movement of either the recorder or reproducer into engagement with a record on said carrier, and manual means to actuate said lever.

3. In a recording and reproducing device the combination of a rotatable disc record carrier, a carriage arranged for movement in a plane spaced above the plane of the record carrier, recording and reproducing devices operatively'supported on said carriage and adapted for joint movement relative thereto in a plane parallel to andspaced from the. plane of the record carrier and independent movement in a plane substantially normail to said last mentioned plane to engage a record on said carrier, and. a single manual means effective to move said devices to cause one or the other to engage a record on said carrier.

4. In a recording and reproducing device. the combination of a record carrier, a carriage arranged for movement iii a plane parallel with, and

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