US1963673A

US1963673A - Reproducing arm

Info

Publication number: US1963673A
Application number: US661063A
Authority: US
Inventors: Carlos E Patino
Original assignee: Individual
Current assignee: Individual
Priority date: 1933-03-16
Filing date: 1933-03-16
Publication date: 1934-06-19
Anticipated expiration: 1951-06-19

Description

Patented June 19, 1934 I UNITED 'STATES PATENT OFFICE 1,963,673 REPRODUOING ARM Carlos E. Patino, Long Island City, N. Y. Application March 16, 1933, Serial No. 661,063

14 Claims. (01. 274-1 This invention relates to reproducing arms for disk record 10, which rotates about the axis 11 use in connection with disk records, and especially in a suitable reproducing machine which forms arms of the amplified reproduction type electrino part of my invention. At 12, I have shown a cally placed in communication with the amplireproducer arm rotatable on the pin 13 'which is .5 fier; and the object of the invention is to provide supported in a suitable casing 14, the latter being 60 means for mounting and manipulating the arm secured to a part of the machine through a brackwith respect to a disk record so as to maintain the et 15. in connection with which the casing 14 inneedle of the reproducer in a. vertical plane, at cluding the arm 12 has a pivotal mounting as right angles to the center or what. may be termed indicated at 16, note Fig} 2 of the drawing, to

the pitch line of the sound producing grooves permit the arm to swing upwardly and down- 65 of the record to eliminate wear on the side edges wardly with respect to the record 10. of said grooves as well as prevent accidental dis- In attaching my improved arm'to a machine placement of the needle from the groove and the and especially when sold independent of the rescratching or marring of the record caused thereproducer machine, I preferably provide the casing 15 by; a further object being to provide means for 14 with a longitudinal, beveled wall tongue 14a 70 rotatably or pivotally supporting the sound reprowhich slidably engages a channeled block ,17 and I ducing head of the arm in connection with the is held in different positions of adjustment by a free end of said arm; a further object being to set screw 18, note Figs. 2 and 4. The arm 12 is provide means at the pivot or fulcrum end of the tubular in form as clearly'seen in Figs. 1 and 2 arm for imparting rotaryv movement to the sound of the drawing, the outer end 12a being slightly 75 reproducing head independent of the rotary movenlarged to receive a block 19 of insulating mament of said arm; a further object being to proterial to which is coupled a tubular extension vide means for swinging the pivoted end of the on an electric reproducer 21, which carries the arm to raise and lower the'same with respect to reproducing needle 22. It will be noted on a conthe record to facilitate the attachment and desideration of Fig. 1 that the enlargement 12a 80 tachment of records with respect to the usual has a slot 23 through whichthe tube 20 is free table supporting said record; a further object to pass as the reproducer head 21 rotates on the being to provide means for adjusting the arm inaxis 24, provided in the end of the arm. ,At the eluding its pivot to properly position the needle of inner end of the tubular support 20 are two electhe reproducer with respect to the record; a still tric spring contacts 25, 25a which complete cir- 85 further object being to provide means including a cuitswith contacts 26, 26a, secured to the block plug at the pivoted end of the arm for placing 19 and to which the circuit wires 27, 27a are atthe reproducer in electrical communication with tached, it being understood that the contacts an amplifying unit; and with these and other 25, 25a are in circuit with the reproducer head objectsin view, the invention consistsin adevice 21 and the reproducing mechanism thereof so 90 of the class and for the purpose specified, which as to transmit the sound vibrations from the is simpleinconstruction,eflicient in use and which grooves 10a of the record 10 to a suitable amis constructed as hereinafter described and plifying unit as in other apparatus of this class. claimed. In the construction shown, the wires 2'7, 27a

The invention is fully disclosed in the followpass through an opening 28 formed in the bottom 95 ing specification, of which the accompanying of the pivoted end of the arm 12 adjacent the 1 drawing forms a part, inwhich' the separate parts pivot 13 and also through an elongated opening of my improvement are'designated by suitable ref 29 formed in the top of the cas'ing14 and extend erence characters in each of the views, and in into the casing, the wire 27 being coupled with which:

' Fig. 1 is a diagrammatic plan and sectional view and from the resistor, a: wire 30a is grounded to showing one of my improved arms and indicating the ground side 31 of a plug socket which has a the method of its use. .contact 32 insulated therefrom, and to which the Fig. 2 is a section on the line 2-2 of Fig. 1; wire 27d is connected, and a conventional plug Fig. -3 is a section on the line 3-3 of Fig. 2; '33 may be placed in the socket in order to couple 5 and, the electric circuit with an amplifying unit ar- Fig. 4 is a side elevation of the device with part ranged in spaced relation to the casing 14.

of the construction broken away. In order to counterbalance the reproducer head In Fig. l of the drawing, I have shown for the 21 on the end of the arm and to avoid a strain on purpose of illustrating my invention a part of a the pivot 'of the arm, I provide a counterbalance 110 'an electric resistor 30 arranged in the casing 14 weight 34 at the inner pivoted end of the arm. This weightvalso serves to support the needle 22 in proper relation with respect'tdthe grooves of the record to prevent excessive wear thereon. At the lower end of the body"19 is an annular disk or pulley 19a around which a belt 35,- preferably in the form of a metallic ribbon, is passed and to which the belt is secured at a predetermined point to prevent slipping of the belt on the pulley. This belt passes around another pulley 36 secured to the pin or shaft 13, the belt being secured 44 which engage a radial pin 45 secured to the shaft 13. The outer end of the pin 45 has an upstanding part 45a which is disposed between the rollers 44 of the

arms

41 and 42. A spring 46 couples the pivoted ends of the

arms

41 and 42 and serves to support the rollers 44 in constant engagement with the pin 45.

From the foregoing description, the operation of my improved-arm will be readily understood when taken in connection with the accompanying drawing and the following statement. When the arm 12 including the reproducer head 21 is in the outermost position on the record 10, the parts will assume the position shown in full lines in Fig. 1 or the drawing, the head 21 being disposed angularly with respect to the longitudinal plane of the arm or to a line connecting the

pivots

13 and 24. In this position of the parts, it will appear that the needle 22 assumes in the outermost groove or grooves of the record, a vertical position at right angles to the groove, so that th point of the needle will rest on the bottom onl of the groove and will not assume an angular position or tangent with respect to the groove which would cause a wearing out of the side walls of the I groove as with the conventional type of mounting and method of operation of reproducer arms in connection with disk records.

From the full line position shown in Fig. 1, as the record is being played and the reproducer 21 travels inwardly toward the axis 11, the head 21 is gradually swung on its pivot 24 through the action of the cam 39 which rotates or swings withthe arm 12. The movement of the head 21 is controlled by the operation of the

arms

41 and 42 on the pin 45 when said arms are released by the cam 39, that is to say, as the cam 39 would depress the roller 40 of the arm 42 and release the roller 40 of the arm .41,'the roller 44 of thelatter arm would move toward the roller 44 of the arm 42 and move the pin 45 correspondingly, which operation rotates the head 21 or swings the same on its pivot; In this connection, it will appear that the pin 45 is in parallel relation to the needle 22, comparing Figs. 1 and 3 of the drawing, and this parallel-relationship is always maintained. It will thus be seen that when the but regardless of the are, the needle is always maintained at .right angles to the groove, that is to say, through a radial line extending from the axis of the record and through the point in the groove where the pointed end of the needle 22 is positioned.

It will also be understood that by reason of the structural arrangement employed for controlling the angular position of the head 21 or the reproducing needle 22 with respect to the arm, my improved device may be used in conjunction with records of various diameters, the

.head 21 assuming its proper angular relationship at all times, regardless of the diameter of the record, at least within the conventional records now employed. However, the same principles of control may be applied in the reproduction of any size of record, the dimensions of the several parts including the contour of the cambeing modified to suit such changes. At a: in Fig. 1 of the drawing, I have shown by dot and dash lines the plane of the needle, and at x the central line of the arm 12. This represents the innermost position of the arm with respect to the innermost grooves of the record 10.

It will be understood that while I have shown various details of construction for carrying my invention into eii'ect, I am not necessarily limited to the specific structural features herein shown and described, and various changes therein and modifications thereof may be made within the scope of the appended claims without departing from the spirit of my invention or sacrificing its advantages.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. A reproducer device for disk records comprising an arm pivoted at apoint outwardly of the periphery of the disk in such manner as to permit the swinging movement of the free end of the arm over said disk, a reproducer head carried by the free end of the arm and includingthe usual reproducing needle, means controlled by the swinging movement of said arm and extending through said arm for imparting independent swinging movement to the head with respect to the free end of said arm, a casing at the pivoted end of said arm and in connection with which said arm is rotatably supported, and means within said casing controlling the operation of said first named means.

2. A reproducer device for disk records comprising an arm pivoted at a point outwardly of the periphery of the disk in such manner as to permit the swinging movement of the free end of the arm over said disk, a reproducer head'carried bythe free end of the arm and including the usual reproducing needle, means controlled by the swinging movement of said arm and extending through said arm for imparting independent swinging movement to the head with respect to the free end of said arm, a casing at-the pivoted end of said arm and in connection with which said arm is. rotatably supported, means within said casing controlling the operation of said first named means, and means for pivotally supporting the casing to a stationary support to permit swinging movement of the arin vertically toward and from said record.

, 3. A eproducer device for disk records comprising arm pivoted at a'point outwardly of the periphery of the disk in such manner as to permit the swinging movement of the free end of the arm 'over said disk, areproducer head cari by the freeend of the arm and includingloi) the usual reproducing needle, means controlled by the swinging movement of said arm and extending through said arm for imparting independent swinging movement to the head with respect to the free end of said arm, a casing at the pivoted end of said arm and in connection with which said arm is rotatably supportedand means for pivotally supporting the casing to a stationary support to permit the swinging movement of said arm vertically toward and from said record, said last named means including means for adjusting the casing with respect to said last named pivotal support.

4. A reproducer device for disk records comprising an arm pivoted at a point outwardly of the periphery of the disk in such manner as to permit the swinging movement of the free end of the arm over said disk,'a reproducer head carried by the free end of. the arm and including the usual reproducing needle, and means controlled by the swinging movement of said arm for im-- parting independent swinging movement to the head with respect to the free end of said arm, said means including a cam rotatable with said arm.

5. A reproducer device for disk records comprising an arm pivoted at a point outwardly of the periphery of the disk in such manner as to permit the swinging movement of the free end of the arm over said disk, a reproducer head carried by the free end of the arm and including the usual reproducing needle, and means controlled by the swinging movement of said arm for imparting independent swinging movement to the head with respect to the free end of said arm,

said means including a cam rotatable with said arm, and a finger on the pivot of said arm controlled and operated by members engaging said cam to regulate the swinging movement imparted to said reproducer head.

6. A reproducer device of the class described reproducer head, and means in said casing actuated by said arm in the swinging movement thereof for controlling and regulating the movement imparted to said reproducer head.

'7. A reproducer device of the class described comprising a casing, an arm mounted upon and pivoted to said casing, said arm being tubular in form and the free end thereof having a pivotin connection with which a reproducer, head is mounted to swing on said pivot with respect to the free end of the arm, means mounted in said arm for coupling both of said pivots together whereby rotary movement of the first pivot will be transmitted to the second pivot to swing said reproducer head, and means in said casing a'ctuated by said arm in the swinging movement thereof for controlling and regulating the movement imparted to said reproducer head, said last named means comprising a cam movable with said arm, and members actuated by the cam and in operative engagement with said first named 8. A reproducer device of the class described comprising a casing, an arm mounted upon and pivoted to said casing, said arm being tubular pivot controlling the rotation thereof.

in form and the free end thereof having a pivot in connection with which a reproducer head is mounted to swing on said pivot with respect to the free end of the arm, means mounted in said arm for coupling both of said pivots together whereby rotary movement of the first pivot will be transmitted to the second pivot to swing said reproducer head, means in said casing actuated by said arm in the swinging movement thereof for controlling and regulating the movement imparted to said reproducer head, said last named means comprising a cam movable with said arm and members actuated by the cam and in operative engagement with said first named pivot controlling the rotation thereof, and means for pivotally mounting the casing in connection with a support to permit vertical, swinging movement of said arm.

9. A reproducer device of .the class described comprising a casing, an arm mounted upon and pivoted to said casing, said arm being tubular in form and the free end thereof having a pivot in connection with which a reproducer head is mounted to swing on said pivot with respect to the free end of the arm, means mounted in said arm for coupling both of said pivots together whereby rotary movement of the first pivot will be transmitted to the second pivot to swing said reproducer head, means in said casing actuated by said arm in the swinging movement thereof for controlling and regulating the movement imparted to said reproducer head, said last named means comprising a cam movable with said arm and members actuated by the cam and in operative engagement with said first named pivot controlling the rotation thereof, means for pivotally mounting the casing in connection with a support to permit vertical, swinging movement of said arm, and means at the pivoted end of the arm for counterbalancing thefree end thereof.

10. A reproducer device of the class described 115 comprising a casing, an arm mounted upon and pivoted to said casing, said arm being tubular in form and the free end thereof having a pivot in connection with which a reproducer head is mounted to swing on said pivot with respect to 120 the free end of the arm, means mounted in said arm for coupling both of said pivots together whereby rotary movement of the first pivot will be transmitted to the second pivot to swing said reproducer head, means in said casing actuated 125 by said arm in the swinging movement thereof for controlling and regulating the movement imparted to said reproducer head, the coupling means between said pivots comprising pulleys secured to the pivots, and a non-extensible belt 130 passed around and secured to said pulleys.

11'. A reproducer device of the class described comprising a casing, a pivot shaft mounted in the casing and extending through the upper end thereof, a reproducer arm rotatably mounted on the protruding end of said shaft and including a sleeve portion extending into said casing, a cam on said sleeve portion within the casing, two curved control arms pivoted I in the casing and normally held in engagement'with said cam, a finger projecting radially from said shaft within the casing and in connection with which the free end of said curved control arms operate to control rotary movement imparted to'said shaft, said reproducer arm carrying at its free end a reproducer head rotatably mounted in the free end of said arm, and means coupled with said pivot shaft for placing said head in operative engagement therewith to impart rotary movement to the head in the rotation of said pivot shaft.

12. A reproducer device of the class described comprising a casing, a pivot shaft mounted in the casing and extending through the upper end thereof, a reproducer arm rotatably mounted on the protruding end of said shaft and including a sleeve portion extending into said casing, a cam on said sleeve portion within the casing, two curved control arms pivoted in the casing and normally held in engagement with said cam, a finger projecting radially from said shaft within the casing and in connection with which the free end of said curved control arms operate to control rotary movement imparted to said shaft, said reproducer arm carrying at its free end a reproducer head rotatably mounted in the free end of said arm, and means coupled with said pivot shaft for placing said head in operative engagement therewith to impart rotarymovement to the head in the rotation of said pivot shaft, said curved control arms including anti-friction rollers engaging said cam and said finger.

13. A reproducer device of the class describe comprising a casing, a pivot shaft mounted in the casing and extending through the upper end thereof, a reproducer'arm rotatably mounted on the protruding end of said shaft and including a sleeve portion extending into said casing, a cam on said sleeve portion within the casing, two curved control arms pivoted in the casing and normally held in engagement with said cam, a finger projecting radially from said shaft within the casing and in connection with which the free end of said curved control arms operate to control rotary movement imparted to said shaft, said reproducer arm carrying at its free end a reproducer head rotatably mounted in the free end of said arm, means coupled with said pivot shaft for placing said head in operative engagement therewith toimpart rotary movement to the head in the rotation of said pivot shaftpsaid curved control arms including antifriction rollers engaging said cam and finger, and means forrpivotally and adjustably mounting said casing inconnectionwith a support. v

14. A reproducer device of the class described comprising a casing, a pivot shaft mounted in the casing and extending through the upper end thereof, a reproducer arm rotatably mounted on the protruding end of said shaft and including a sleeve portion extending into said casing, a cam on said sleeve portion within the casing, two curved control arms pivoted in the casing and normally held in engagement with said cam, a finger projecting radially from said shaft within the casing and in connection with which the free end of said curved control arms operate to control rotary movement imparted to said shaft, said reproducer arm carrying at its free end a reproducer head rotatably mounted in the free end of said arm, means coupled with said pivot shaft for placing said head in operative engage-