Патент USA US2130931код для вставки
Sept. 20, 1938. > A. RYSICK = 2,130,931 DRIVE FOR RECORDING AND REPRODUCING_DEV_ICES Original Filed March 7, 1935 2 Sheets-Sheet 1 7/‘? var? fan. Sept. 20, 1938. 2,130,931 A. RYSICK DRIVE FOR RECORDING AND REPRODUCINGDEVICES Original Filed March 7, 1935 75 2 (1%. Q 2 Sheets-Sheet 2 *A \ Patented Sept. 20, 1938 2,130,931 UNITED. STATES’ PATENT OFFICEv 2,130,931 DRIVE FOR RECORDING AND REPRODUC ING DEVICES Arno Rysick, Dresden, Germany Application March 7, 1935, Serial No. 9,811. Re newed May 20, 1937. In Germany March 2, 1934 7 Claims. This invention relates to driving means for the turntable of plate or disc recording and/or re producing devices. ' One object of the invention resides in the pro ‘ vision of new and improved means of the char-. acter described, which shall be economical of manufacture, compact; and effective to drive the turntable of a dictating or like machine at any 10 one of a plurality of different speeds. - Yet another object of the invention consists in the provision of driving means of the character described, which may be readily manipulated to produce a wide range of. operating speeds of the turntable from. a single constant speed of the 15 driving means, the speeds of the turntable being arranged to be accelerated or decelerated in mi ((71. 74-190) also embraced by a bow II disposed on the plate 5. The plate 5 has also a projection I2 similar to the projection I3 arranged on the opposite end of the plate 6. Between the two projections I2, I3 a tension spring “is ?xed which has the Ol tendency to draw the displaceable plate 6 into its highest end position. The plate 6 constitutes the engageable and dis engageable carrier for the transmission gears. and for this purpose is provided with a bearing bolt 10 I5 which, directly above the plate 6, supports a friction disc I6 connected with a superposed fric tion disc I‘! of smaller diameter. Above the fric tion disc I'l_ the journal or bolt I5 carries an e1 bow lever I8 provided at its angular end with a journal or bearing pin I9 for a third-friction disc 20 ofmedium diameter and articulated at its free end to a control lever 23 by means of _ in the following description of a preferred em- . the hinge pin 2| and the drawbar 22. The con 20 bodiment of the invention which has been se-.. trol lever 23 is arranged on a pivot 24 which is lected for illustration in the accompanying draw disposed outside the range of the turntable in ings. It will be understood however that many the frame of the device. In Fig. 1 one end posi changes in form, construction and arrangement, tion of the control lever 23 is shown at which may be made ‘by those'vskilled in the ‘art,_ without the friction disc 20 engages directly between the 25 departingirom the scope and spirit of the inven— friction disc 2 arranged on the motor shaft I and 25 tion as expressed in the appended claims. the driving edge 3 of the turntable. As indicated In the accompanying drawings: in the drawings, at this position, the other fric Figure l is a plan view of a driving means em tion discs I6, I‘! will not contact with the driv I bodying a preferred form of the invention, the ing edge 3 or the friction disc 2 on the motor nute or relatively great increments. Other objects and advantages will be apparent 30 turntable being partially broken away to better illustrate the driving means. Fig. 2, a similar view as that shown in Fig. l, but with the driving members differently ad I Justed; 35 Fig. 3, a side view of the driving members; and a Fig. 4, a view of the drive in disengaged posi on. A prime mover, preferably an electric motor (not shown) is arranged to drive a shaft I, the , upper end of which is provided with a plurality of stepped driving cones 2. The depending ?ange 3 of the turntable joumaled on a vertical axis A is shown in vertical elevation in Fig. 3 and in plane cross-sectional views‘ in each of Figs. 1, 2 .H and 4. It will be understood that the disc-sup porting surface of the turntable is coincident with the plane de?ned by the upper edge of the flange 3, as shown in Fig. 3. " To the frame 4, shown inv Fig. '3, of the motor, . not shown, a plate 5 is secured forming the car rier for the entire switching arrangement. This base plate_5 carries a set screw ‘I on which an other plate 6 is guided by means of the slot 8. The plate 6 further possesses a lengthening piece 9 which at its front end carries a roll I0 and is shaft I. In Fig. 2, the other end position of the 30 control lever 23 is shown, at which the friction disc 20 arranged on the bell crank I8 is indicated - only by dots and dashes to improve the view. At this position of the parts, the plate 6 has been farther drawn up by the spring I II. The bell crank I8 has been swung about the pin I5 to render motion of the carrier 6 impossible. The parts are then in the position at which the largest friction disc I6 engages the driving wheel 2 whereas the friction disc I‘! ?rmly connected with 40 the friction disc I6 hugs‘the edge 3 of the turn table. Transmission is effected from the motor shaft to the driving edge 3 of the turntable by means of the wheels 2, I6, I1. At the position of parts according to Fig. 1 the turntable will have a speed of approximately 78 revolutions, which corresponds to gramophone speed, so that discs on which sound has been recorded at this speed by a suitable device can be instantly reproduced by a gramophone. 50 At the position of parts according to Fig. 2 the turntable has a slower speed amounting approxi mately to only 33 revolutions and being suited only for dictating machines for taking as much dictation as possible on each plate.“ slight regu 55 2 2,180,981 lations of the speed are possible by axially dis placing on the motor shaft the driving wheel with, and arranged to be rotated by, said ?rst mentioned wheel and to drivingly engage the The engagement of the friction wheels will always be maintained, as the ?ange on said disc, a friction wheel journaled on said lever eccentrically of the lever. axis and adapted to simultaneously engage both the prime mover and disc ?ange in one position of said lever, means to actuate said lever, and means to actuate said carrier. . 2 formed as a cone. spring It takes care that the friction discs are properly pressed in between the motor shaft and the driving edge. ' ' The switching device is used also .as starting 2' and stopping device for the machine by having 10 a. control lever 26 movably arranged on a. pin 25 in the machine frame. The control lever 26 3. In a drive of the character described, the combination of a prime mover, a, rotatably sup 10 ported disc, a carrier member slidably mounted in is pwitioned with its front end in a guide 21 underlying relation with respect to said disc and which ?xes the end positions of the control lever in close proximity thereto, a plurality of fric 26. On another pin 28 arranged in the machine tion wheels journaled on a. ?xed axis on said 16 frame an adjusting lever 29 is provided which member for joint rotation in» planes parallel to 15 with its front sloping end is placed on the guide the plane of saidv disc and intermediate the disc roll l0 disposed on the plate 6. The lever 29 and carrier member, a lever pivoted on said fric is articulated to the control lever 26 by means tion wheel axis, a friction wheel journaled on of a drawbar 30. The control lever 28 projects said lever for rotation in a plane parallel to the from the casing of the device and can be brought \ plane of said disc, at depending ?ange on said 20 into one or the other end position. At the posi disc, means to move said carrier member into tion of the control lever 26 shown in Figs. land 2 and out of position to cause said plurality of the adjusting lever 29 is so high up that the wheels to provide a driving engagement between friction wheels are in engagement with the edge said prime mover and the ?ange on said disc, of the turntable and the motor shaft, so that and means-to move said lever to cause the wheel transmission of motion from the driving motor _ thereon‘ to form a driving engagement between a said prime mover and said ?ange when said car to theturntable is possible. On the other hand, if the control lever 28' is brought into the posi tion according to Fig. 4, the adjusting lever 29 rier is out of position with respect to said plu rality of wheels. will be moved so as to press with its front end upon the guide roll l0 and thus push the car 4. In a drive of the character described, the combination of a prime mover, a rotatably sup rier G for the friction wheels i6, i1, 20 into low ermost position to bring it out of engagement ported disc, alcarrier member slidably mounted with respect to said disc and in close proximity thereto, a plurality of friction wheels journaled with the turntable as well as with the friction cone 2 on the motor shaft i. Transmission of on a. ?xed axis on said member for joint rotation 35 motion is thereby interrupted and the turntable in planes parallel to the plane of said disc, a lever stopped. It is immaterial whether the control lever 23 is in the position according to Fig. 1 or 2, that is, whether the one group of friction 40 ‘wheels is in operative position or the other fric tion disc. Starting and stopping by means of‘ the lever 26 is possible without any trouble, as pivoted on said carrier, a friction wheel journaled on said lever for rotation in a plane parallel to all the control parts are articulated to one an other and capable. of cooperating in any motion. The invention is not'limited to the embodi 45 ment shown, but may be carried out in other ways. For example, the displaceable - carrier could carry several sets of friction wheels which alternatively become operative, so that the tum table can rotate at more than two speeds. I‘ claim: . 1. A drive-for a recording and reproducinggde vice for plates or discs, comprising a casing, a turntable in said casing, a driving edge on the 55 circumference of theturntable, a driving motor in said casing, a movable carrier displaceably dis posed on said casing, a bearing pin on said car rier, ‘a lever pivoted on said bearing pin, _a pair of friction wheels ‘journaled on said bearing pin the plane of said disc, 2. ?ange on‘ said disc, means to move said carrier member into and out of position to cause said, plurality of wheels to provide a. driving engagement between said prime , rier. 5. In a drive of the character described, the combination of a prime mover, rotatably sup ported disc, a ?ange on said disc, 2. carrier mem ber slidably mounted with respect to said disc 50 and in close proximity thereto, a plurality of fric tion wheelsjoumalled on a ?xed axis on said member for joint rotation in planes parallel to the plane of said disc, yieldable means tending to slide said carrier member in a direction to pro vide a driving connection between said‘plurality of wheels, said prime mover. and‘ the ?ange on said disc, a lever pivoted on said carrier, a fric tion wheel journalled on said lever for rotation lever, said carrier being movable into and- out of ~position-"to establish a driving connection fromv means to move said carrler'in a direction reverse 65 effective to move the wheel thereon into and out of position to establish a driving connection from said motor to the said edge of the turntable. 2. In a drive of the character described, the 40 mover and the ?ange on said disc, and means to move said lever to cause the wheel thereon to form a driving engagement between said prime mover and said ?ange in one position of said car 45. and a friction wheel journaled on said movable said motor through said pair of wheels’ to the driving edge of said turntable, said lever being 30 in a plane parallel to the plane of said disc, 60. vto that in which the carrier is moved by said yieldable' means to disengage the driving con nection between said prime vmover and said disc and means to rotate said lever to form a driving connection between said prime mover, the wheels on said lever and said disc. I ' combination of a prime mover, a rotatably sup-" 6. In a drive of the character described, the 70 ported disc having a depending ?ange. a carrier combination of a prime mover, a. rotatably sup 70 member slidably mounted in underlying relation ported disc, a carrier member slidable between with respect to'said disc, a lever journaled on two positions, a plurality of friction wheels jour- said carrier,’ a ‘friction 'wheel on said carrier co nailed on a. fixed axis on said member for joint axial with saidplever and adapted to engage said prime mover, a second‘ friction’ wheel coaxial rotation in ‘planes parallel to the plane of said disc, a‘?ange on said disc, a lever pivoted on said 76 - 3 . carrier, a friction wheel iournalled on said lever for rotation in a. plane parallel tovthe plane of said disc, means tending to move said carrier into one or‘ its said positions to cause said plurality two spaced positions, yieldable means tending to move said carrier to one of said positions, a plu rality of friction wheels journalled on said mem her and operable in the position to which said of wheels to provide a_ driving engagement be yieldable means tends‘ to move said member to tween said prime mover and theilange on saidv provide a driving connection between said prime disc, manual means to‘ move said carrier to the _ mover and said disc, a friction wheel movably sup second of the said positions to disable the driving on said carrier member for rotation on connection between said prime mover. said plu ported an axis extending parallel to the rotary axes of 10 rality oi wheels and said disc, and means to actu said plurality of friction wheels, means to move ate said lever to cause the wheel thereon-to form said carrier to the second of its positons in which 10 a driving engagement between said prime mover said plurality of wheels are disabled from driv and said ?ange when said carrier occupies a po ing connection between said prime mover and sition identified with the disabled condition of said disc, and means to move said last mentioned said plurality of wheels. friction wheel bodily when said carrier occupies 7. In a drive of the character described, the said last mentioned position to provide a driv 15, combination of a prime mover, a rotatably sup connection between said prime mover, said ported disc, a carrier member slidably supported ing last mentioned friction wheel and said disc. with respect to said disc in close proximity there 20 to, said carrier member being movable between mo nrsrcx. 20 '