US2287098A

US2287098A - Automatic record changing apparatus

Info

Publication number: US2287098A
Application number: US412707A
Authority: US
Inventors: Harvey C Habegger
Original assignee: Farnsworth Television and Radio Corp
Current assignee: Farnsworth Television and Radio Corp
Priority date: 1941-09-29
Filing date: 1941-09-29
Publication date: 1942-06-23
Anticipated expiration: 1959-06-23

Description

June 23, 1942.

FIG.

H. C. HABEGGER AUTOMATIC RECORD CHANGING APPARATUS Filed Sept. 29, 1941 2 Sheets-Sheet l INVENTOR C. HABEGGER June 23, 1942. c HABEGGER Z,Z87,@93

' AUTOMATIC RECORD CHANGING APPARATUS Filed Sept. 29, 1941 '2 Sheets-Sheet 2 ISA FIG.6 7 FIG.?

a i IN V ENTOR i C HBEGGER kfi ATTORNEY Patented June 23, 1942 AUTOMATIC RECORD CHANGING APPARATUS Harvey C. Habegger, Monroe, Ind., assignor to Farnsworth Television and Radio Corporation, a corporation of Delaware Application September 29, 1941, Serial No. 412,707

1'1 Claims.

This invention relates to automatic recordchanging apparatus and more particularly to an improved mechanism for supporting a stack of records and moving the supported records one at a time to a playing position.

According to conventional drop-down recordchanging apparatus, records are supported above a turntable either by a plurality of peripheral supports or by a peripheral support and means on a centering pin or solely by means on a centering pm.

In drop-down record-changing apparatus where the records are supported by a plurality of peripheral supports the records are moved to playing position either by an element associated with one of the peripheral supports or by means on the centering pin or by having a plurality of knives temporarily moved between the lowermost supported record and the second lower-most supported record at their peripheral edges after which the plurality of peripheral supports temporarily move out of supporting position for per mitting the lower-most supported record to drop into playing position.

In drop-down record-changing apparatus where the records are supported by a peripheral support and means on the centering spindle, the records are moved to playing position by an element associated either with a peripheral support or the centering pin. In drop-down recordchanging apparatus where the records are sup ported solely by means on the centering pin, the records are moved to playing position by imparting a lateral movement thereto by an element associated with the centering pin.

The object of the present invention, therefore, is to provide an improved record-changing appa -ratus incorporating a centering pin which is adapted to support a stack of records, either warped or fiat, by engaging edge portions at the centering aperture of the lower-most supported record.

Another object of the present invention is to provide an improved record-disengaging mechanism which is associated with the centering pin and which releases the supported records one at a time without imparting to the released record any lateral movement relative to the centering pin.

playing position on the turntable in a plane substantially parallel to the turntable.

Another object of the present invention is to provide an improved record-changing and record-disengaging mechanism for a drop-down record changer in which, after all the records have been played, they may be removed from the turntable without removing the centering pin.

Another object of the present invention is to provide an improved record-changing and reoord-disengaging mechanism for operating upon a stack of intermixed records.

In accordanace with the present invention, there is provided a record-changing apparatus which includes a centering pin with a reducedportion in the plane of a second lower-most supported record, first movable means for supporting a sack of records for engaging an edge portion .t the centering aperture of the lower-most supported record, second movable means for moving the se ond lower-most supported record into supporting position with the reduced portion of the centering pin, cam means operatively associated with the first and second movable means for successively moving the second movable means and permitting the first movable means to move out of supporting position whereby the lower-most supported record is released from its supported position.

For a better understanding of the invention, together with other and further objects thereof, reference is made to the following description taken in connection with the accompanying drawings, and its scope and its steps will be pointed out in the appended claims.

In the accompanying drawings:

Fig. 1 is a top plan view of the record-changing apparatus in accordance with the invention showing the turntable and base plate in phantom;

Fig. 2 is a side elevation of the record-changing apparatus showing a stack of records supported over the turntable and two records on the turntable, the top one being in playing position;

Fig. 3 is a fragmentary view of the centering pin showing the means for supporting a stack of records;

Fig. 4 is a. fragmentary view of the centering pin showing the means for supporting the uppermost records of a stack while the lowermost record is being released.

Figs. 5, 6 and 7 are enlarged fragmentary views of the centering pin showing various positions of the elements for supporting and releasing records.

Referring now more particularly to Figs. 1

and 2 of the drawings, the invention here illustrated shows a record-changing apparatus which includes a base plate III, to one side of which is fixed in a suitable manner a pedestal II, which is adapted to pivotally support a pickup arm I2 in such a manner that the pickup arm may be moved in a horizontal and vertical plane. At the free end of the pickup arm I2 there is provided a reproducer I3 with a stylus I4 for reproducing records.

A bearing element I5 rests on the base plate II) to rotatably support a flanged tubular shaft I6 which extends above and below the base plate III. A turntable I1 for supporting and rotating disc records I8, as shown in Fig. 2, is connected in a suitable manner to the flanged portion of the tubular shaft I6. The lower end of the tubular shaft I6 also has aflixed thereto a frictional driving member I9 and the rotating member 29. The function and operation of the members I9 and 20 will be described hereafter. The driving mechanism for the turntable I1 and the tubular shaft I6 is not shown, but any suitable means may be used which is well known in the art.

Record-supporting and record-disengaging mechanism The mechanism for supporting a stack of records IBA (Fig. 2) above the turntable I1 and for moving the records one at a time to playing position on the turntable is best illustrated in Figs. 2-7 and includes a bracket 2| afllxed in a'suitable manner to the bottom of the base plate Ill. A tubular centering pin 22 is fixed in a suitable manner to the bracket 2|, preferably by a looking nut 23. The centering pin 22 extends upwardly through the tubular shaft I6 and above the turntable I1. Near the upper end of the centering pin 22 there are provided slots 24-24, preferably diametrically opposite to each other. Near the lower end of the slots 24-24 movable members 25-25 are fixed to the centering pin 22. The members 25-25 will also be referred to herein as first movable means. At the free ends of the members 25-25 there are provided ears 26-26 for moving in the slots 24-24 from the positions shown in Figs. 3 and 5 to the positions shown in Figs. 4, 6 and 7. When the ears 26-26 are in the position shown in Figs. 3 and 5, they are adapted to support a stack of records I8A above the turntable I1 by engaging edge portions at the centering aperture of the lower-most supported record. Above the slots 24-24 and on one side of the centering pin 22 there is provided a notch or reduced portion 21 in the plane of the second lower-most supported record. The centering pin 22 has a cut-out portion 29 on the side opposite to the notch 21. Another movable member 29, preferably being fixed to the centering pin 22 near its upper end and having a turned-down ear 30, is adapted to be moved in and out of the cut-out portion 28'. The member 29, which will also be referred to herein as second movable means, is shown in its normal position in Figs. 3, 5 and 7. When the member 29 is moved to the position shown in Figs. 4 and 6, the turned-down ear 30 engages the wall of the second lower-most supported record at its centering aperture and moves it into supporting engagement with the notch 21.

In order to maintain the supported records in a stable, balanced position, there is connected in a suitable manner as shown in Fig. 1 at one side of the base plate I0 and beyond the periphery of the turntable I1 a hinged member 3|. The hinged member 3| is shown in operative position in Fig. 2 of the drawings.

Extending from the cut-out portion 28 through the bottom of the centering pin 22 is a cam member 32. The cam member 32 is adapted to be rotated by a lever 33 which is spring-biased by a spring 34, one end of which is connected to the lever 33 and the other end of which is suitably connected to the base plate I0. The movement of the lever 33 will be described hereafter. The upper end of the cam member 32 is preferably of such shape that it is in engagement with the members 25-25 and 29 at all times. When the cam member 32 is in the position shown in Fig. 5, the members 25-25 are maintained in record-supporting position and the member 29 is permitted to assume a position so that the turned-down ear 30 is out of engagement with any of the supported records. When the cam member 32 is rotated to the position shown in Fig. 6, it performs two functions. First,

it moves the member 29 so that the ear 30 engages the wall of the second lower-most supported record at its centering aperture and moves it into supporting position in the notch 21. Second, it permits the members 25-25 to move to a position so that the ears 26-26 move out of record-supporting position. The upper end of the cam member 32 is also provided with a notch 35. It is seen from Fig. '1 that when the cam member 32 is rotated to the position there illustrated, the notch 35 permits the member 29 to be maintained out of record-engaging position at the same time that the ears 26-26 are maintained out of record-supporting position.

Driving mechanism for moving the pickup arm and operating the record-disengaging mechamsm The mechanism for moving the pickup arm I2 and for rotating the cam member 32 is best illustrated in Figs. 1 and 2 of the drawings and includes a shaft 36 which is fixed to the base plate I0 and extends downwardly therefrom. A cam wheel 31, flanged at its periphery, is mounted on the shaft 36 and is adapted to be rotated by bringing its peripheral wall into driving engagement with the peripheral wall of the driving member I9 which rotates with the turntable I1. The cam wheel 31 is brought into driving relationship with the driving member I9 by a tripping mechanism which will be described hereafter. After the cam wheel 31 has made one revolution, the driving engagement between it and the driving member I9 is broken by a cutout portion 38 in the peripheral wall of the cam wheel 31 when it moves into a position opposite the peripheral wall of the driving member I 9. One complete revolution of the cam wheel 31 defines a record-changing cycle of operation.

The first operation which the cam wheel 31 performs as it begins to rotate is to elevate the pickup arm I2 out of engagement with a record on the turntable I1. is moved to the turntable, it also lowers the pickup arm I2 into engagement with the initial playing groove of that record. The elevating and lowering of the pickup arm I2 is brought about by a cam surface 40 (Figs. 1 and 2) near the periphery of the cam wheel 31. As the cam wheel 31 rotates, the cam suface 49 is moved under a pin H which is adapted to be brought into and out of engagement with the underside of the pickup arm I2. When the cam wheel And after another record 31 is at rest, the pin 4| rests on a portion 480 of the cam surface 48, as shown in Fig. 2. when the cam wheel 3! begins to rotate for a record-changing operation, a portion 48A of the cam surface 48 moves into engagement with the pin 4| to raise the pin and therewith the pickup arm |2. After the pickup arm |2 has been raised, the cam surface 48 maintains the pickup arm l2 in, its elevated position while the cam wheel 31 is rotating to swing the pickup arm |2 to' its outward-most position, to disengage the lower-most supported record to permit it to fall into playing position on the turntable l1 and to swing the pickup arm back over the initial playing groove of the new record on the turntable. Immediately after the pickup arm I2 has been swung back over the initial playing groove of a record on the turntable, a portion 48B of the cam surface 48 moves under the pin 4| and allows the pickup arm to move downwar ly so that the stylus H in the reproducer I3 omes intoengagement with the initial playing groove of arecord on the turntable.

Another operation performed by the rotating cam wheel 31 is to swing the pickup arm l2 to an outward-most position after it has been raised out of engagement with a record on the turntable and then back over the initial playing groove of a record on the turntable. The pickup arm I 2 has afllxed to its pivotal end a tubular shaft 42 which extends downwardly through the pedestal.||. At the lower end of the shaft 42 there is affxed preferably a bifurcated lever 43 with

arms

44 and 45. The free end of arm 44 has afiixed to it a spring member 46. As the pickup arm I2 is moved in a horizontal plane, the spring member 46 moves over the cam areas 4|58 on the cam wheel 31. When the, spring member 46 is over the cam area 41, it is not in engagement with this cam area and is adapted to move freely. When the spring member 46 is over the cam surfaces 48-58, it is adapted to engage these surfaces and thus it can only be moved againstthe friction created by the engagement of the spring member 46 with any of the cam surfaces 48-58. When the stylus M of the pickup arm I2 is in the initial playing groove of a record on the turntable II, the lever 43 and the spring member 46 are in the positions shown in Fig. 1. the pickup arm I2 is moved toward the tripping groove of a record on the turntable II, the lever 43 and the spring member 46 are moved in a clockwise direction toward a cam wall 5| on the cam wheel 31. After the rotation of the cam wheel 31 has been initiated and the pickup arm |2 has been elevated, the cam wall 5| engages the spring member 46 and moves the lever 43 and therewith the pickup arm |2 in a counterclockwise direction until the pickup arm |2 is in its outward-most position. At the time when the pickup arm I2 has reached its outward-most position, the cam groove 49 moves into engagement with the spring member 46 and maintains the lever 43 and the pickup arm l2 in the outward-most position while the lower-most supported record is disengaged from its supports and is permitted to move into playing position on the turntable. Thereafter, the cam groove 58 moves into engagement with spring member 46 and moves the lever 43 in a clockwise direction (Fig. 1) to a position over the initial playing groove of the top record on the turntable l1.

As the stylus of When the cam wheel 31 has stopp d rotat-' ing, the spring member 46 and the arm 43 are back in the position shown in Fig. 1.

The rotating cam wheel 31 also cooperates to move the spring-biased lever 33 and the cam member 32 at the proper time to disengage a supported record from its supports so that it may drop to playing position on the turntable After pickup arm I2 has been swung to its outward-most position, a finger 52 extending downwardly from the cam wheel 31 moves into engagement with the free end of the lever 33 and moves it in a clockwise direction (Fig. 1) against the biasing action of the spring 34. The clockwise movement of the lever 33 moves the cam member 32 from the position shown in Fig. 5 to the position shown in Fig. 6 to release the lower-most supported record to permit it to drop to playing position on the turntable After the lower-most supported record is released, the finger 52 moves out of engagement with the lever 33 and the spring 34 moves the lever 33 and the cam member 32 back to normal position.

Automatic tripping mechanism diate its ends, the lever 53 is slidably connected to a member 54 which'extends downwardly from the bottom of the base plate l8. At the opposite end of the lever 53, there are provided a turneddown ear 55 and a turned-down ear 56. When the lever 53 is moved by the lever 43, the ear 55 is adapted to come into engagement with one end of a lever 58 which is slidably connected to the top surface of the cam wheel 3'! preferably in the manner illustrated in Fig. 1. The opposite end of the lever 58 has a curved-portion 59 and a notched-portion 68, as illustrated in Fig. 1. When the lever 58 is moved by the lever 53, the curved-portion 58 and the notched-portion 68 are adapted to move into the path of a hooked-portion 6| which is provided on the member 28, which rotates with the shaft l6 and the turntable II. When the pickup arm I2 is in the initial playing groove of a record on the turntable, the levers 53 and 58 are in the positions shOWn in Fig. 1. As the record is being reproduced and the stylus l4 of the pickup arm I2 is tracking the playing groove of the record, the lever 43 moves with the pickup arm l2 and moves the lever 53 into engagement with the lever 58. Thereafter, while the stylus of the pickup arm I 2 is still tracking the playing groove of the record, the levers 53 and 58 are moved a predetermined distance toward the member 28 during each revolution of the shaft l6. The movement of the lever 58 a predetermined distance is suflicient to bring the curved-portion 59 but not the notched-portion 68 into the path of the hooked-portion 6| of the member 28. When the hooked-portion 6| engages the curved-portion 59, the lever 58 and the lever 53 are moved a corresponding predetermined distance in a direction opposite to that imparted by the lever 43. When the stylus of the pickup arm l2 moves into the tripping groove of revolution of the shaft |6. The movement of the lever 58 more than a predetermined distance toward the member 20 moves the notched-portion 69 into the path of the hooked-portion 6|. When the hooked-portion 6| engages the notched-portion 66, it moves the lever 58 and therewith the cam wheel 31 sufficiently to move the cam wheel 31 into driving engagement with the driving member l9. After the cam wheel 31 begins to rotate, the hooked-portion 6| moves out of engagement with the notched-portion 66 and the member 20 is of such shape that it moves the lever 58 relative to the cam wheel 31 back to the position shown in Fig. 1.

Manual tripping mechanism In addition to the automatic tripping mechanism described, the cam wheel 31 may be moved into driving relationship with the driving member l9 by a manual control mechanism. This mechanism includes an L-shaped lever' 61 pivotally connected intermediate its ends to the bottom of the base plate l8 by a pin 68 (Fig. 1). One end of the lever 61 has a turned-up portion 69 which extends through a slot in the base plate I6 and is adapted to be moved into three different positions-a manual playing position, an automatic playing position and a reject position. These positions are marked on the base plate III, as illustrated in Fig. 1. When the lever 61 is moved to manual playing position, its opposite end moves a pin 16 which extends downwardly from the lever 33 until a curved-end 1| on the lever 61 engages the pin 10 to lock the lever 61 in manual playing position. A spring member 13, one end of which is fixed to the lever 61 and the other end of which is adapted to rest against the turned-down peripheral flange of the base plate I, as shown in Fig. l, is adapted to have tension created in it by a movement of the lever 61 to reject position and to have no tension created in it when the lever 61 is moved to manual playing position. Intermediate the turned-up portion 69 and the pin 68, there is afiixed to the lever 61 a rod 14. The opposite end of the rod 14 is slidably connected to the base plate III in a suitable manner such as that shown in Fig. 1. Intermediate the ends of the rod 14, there is afiixed to it a spring 15, the other end of which is fixed to base plate I0. When the lever 61 is in automatic playing position shown in Fig. 1, the spring 15 is under slight tension. However, this tension in the spring 15 is not sufiicient to move the lever 61 from automatic playing position against the action of the spring 13. When the lever 61 is moved by the turned-up portion 69 to the reject position against the biasing action of the spring 13, the action of the lever 61 and the spring 15 on the rod 14 moves the notched-portion of the lever 58 into the path of the hooked-portion 6| of the member 26. When the hooked-portion 6| engages the notched-portion 60, the lever 58 and the cam wheel 31 are moved sufficiently far to bring the cam wheel 31 into driving relationship with the driving member l9. When the operator releases the turned-up end 69 after the lever 61 has been moved to reject position, the tension in spring 13 moves the lever 61 back to automatic playing position.

Mechanism for adjusting apparatus for manual operation When the turned-up end 69 of the lever 61 is moved against the tension of spring 15 to manual playing position, the opposite end of the lever 61 moves into engagement with the pin 19 on the lever 33, as has been previously described and rotates the lever 33 in a counterclockwise direction until the curved-end 1| locks the lever 61 in manual playing position. The counterclockwise movement of the lever 33 rotates the cam member 32 from the position shown in Fig. 5 to the position shown in Fig. '1. As has been previously described, this movement of the cam member 3| adjusts the movable members 25-25 and 29 into a position so that the operator may drop records over the centering pin 22 into playing position on the turntable. When the lever 61 is moved into manual playing position, it also moves the free end of the rod 14 into the path of the turned-down ear 56 provided on the lever 53. In this position, the rod 14 prevents the lever 53 from engaging the lever 58 and thus operating the automatic tripping mechanism.

After a stack of records has been played and The general mode of operation of the recordchanging apparatus will now be described. First, the turned-up portion 69 of the lever 61 is moved to automatic playing position so that the movable members 25-25 and 29 are in the positions shown in Fig. 5. Thereafter, a stack of records |8A is placed on the centering pin 22 to be supported by the ears 26-26. In order to maintain the supported records in a stable, balanced position, the member 3| is moved to engage the top surface of the top-supported record, as shown in Fig. 2.

After the records are placed in supporting position on the centering pin 22, the driving mechanism (not shown) for rotating the turntable l1 and the driving member I9 is initiated.

Thereafter, the operator moves the lever 61 to reject position. This causes the rod 14 to move the notched-portion 60 of the lever 58 into the path of the hooked-portion 6| of the rotating member 28. The engagement of the hookedportion 6| with the notched-portion 60 moves the lever 58 and cam wheel 31 sufiiciently to bring the cam wheel 31 into driving relationship with the driving member l9.

The first function that the rotation of the cam wheel 31 performs is to swing the pickup arm |2 to its outward-most position by bringing the cam wall 5| into engagement with the spring member 46 provided on the arm 44. Thereafter, the groove 49 moves into engagement with the spring 46.

While the groove 49 is in engagement with the spring 46, the pickup arm I2 is maintained in its outward-most position and the finger 52 extending downwardly from the cam wheel 31 engages the lever 33 and moves it in a clockwise direction against the biasing action of the spring 34. The clockwise movement of the lever 33 rotates the cam member 32 from the position shown in Fig. 5 to the position shown in Fig. 6. This movement of the cam member 32 first moves the movable member 29 outwardly to the position shown in Figs. 4 and 6 to move the second lower-most supported record horizontally into supporting position with the notch 21. Second, it permits the movable members 25-25 to move to the position shown in Figs. 4 and 6 for disengaging the lower-most supported record and permitting it to drop into playing position on the turntable [1. After the lower-most supported record has been released from the ears 2626, the spring 34 returns the lever 33 and the cam member 32 to the position shown in Figs. 1 and 5, thus, again permitting the stack of records to be supported by the ears 26-26.

Thereafter, the cam groove 50 on the cam wheel 31 moves into guiding relationship with the spring member 46 on the arm 44. The continued rotations of the cam wheel 31 moves the lever 43 and therewith the pickup arm 12 to a position where the stylus l4 of the pickup arm I2 is over the initial playing groove of the top record on the turntable l1. Thereafter, the portion 403 of the cam surface 40 on the cam wheel 31 permits the pin 4| to move downwardly tolower the stylus l4 of the pickup arm l2 into engagement with the initial playing groove of the top record on the turntable l1.

When the stylus 14 of the pickup arm comes into engagement with the initial playing groove of the top record on the turntable H, the cutout portion 38 in the peripheral wall of the cam wheel 31 moves into a position opposite the peripheral wall of the driving member i9 and thereby the driving engagement between the cam wheel 31 and the driving member I9 is broken.

As the stylus l4 tracks the playing groove of a record on the turntable H, the arm 45, frictionally connected to the lever 53, is in engagement with the lever 58 and while the stylus l4 of the pickup arm I2 is still tracking the playing groove of the record on the turntable H, the levers 53 and 58 are moved forward and backward during each revolution of the shaft [6. These alternate movements of the levers 53 and 58 are imparted by the arm 45 and the hookedportion 6! of the member 20, respectively. When the stylus I4 enters a tripping groove of the record on the turntable H, the levers 53 and 58 are moved sufiiciently far toward the member 20 to cause the notched-portion 60 of the lever 58 to come into engagement with the hooked-portion 6! of the member 21. Thereupon, the hooked-portion 6| moves the lever 58 and therewith the cam wheel 31 sufficiently far to bring the cam wheel 31 into driving engagement with the member l9 to be driven through another record-changing operation.

While there has been described what is at present considered the preferred embodiment of the invention, it will be obvious to those skilled in the art that various changes and modifications may be made therein without departing from the invention and it is, therefore, aimed in the appended claims to cover all such changes and modifications as fall within the true spirit and scope of the invention.

What is claimed is:

1. A record-changing apparatus comprising a centering pin, first movable means on said pin for supporting a stack of records by engaging an edge portion at the centering aperture of the lower-most supported record, a reduced-portion on said pin in the plane of the second lower-most supported record, second movable .means for moving the second lower-most supported record into supporting position with said reduced portion, movable cam means for successively moving said second movable means and permitting said first movable means to move out of supporting position whereby the lowermost supported record is released from its supported position, and means for driving said cam means.

2. A record-changing apparatus comprising a fixed centering pin, first movable means on said pin for supporting a stack of records by engaging edge portions at the centering aperture of the lower-most supported record, a reduced-portion on said pin in the plane of the second lowermost supported record, second movable means associated with said pin for moving the second lower-most supported record into supporting position with said reduced-portion, cam means for successively moving said second movable means and permitting said first movable means to move out of supporting position whereby the lowermost supported record is released from its supported position, and means for driving said cam means.

3. A record-changing apparatus comprising a fixed centering pin, a pair of movable members on said pin positioned diametrically opposite thereto for supporting a stack of records by engaging edge portions at the centering aperture of the lower-most supported record, a reducedportion on said pin in the plane of the second lower-most supported record, movable means for moving the second lower-most supported record into supporting position with said reduced-portion, cam means for successively moving said movable means and permitting said pair of movable members to move out of supporting position whereby the lower-most supported record is released from its supported position, and means for driving said cam means.

4. A record-changing apparatus comprising a tubular spindle, first movable means on said spindle for supporting a stack of records by engaging edge portions at the centering aperture of the lower-most supported record, a reduced-portion on said spindle in the plane offthe second lower-most supported record, second movable means for moving the second lower-most supported record into supporting position with said reduced-portion, cam means rotatable in said spindle for successively moving said second movable means and permitting said first movable means to move out of supporting position whereby the lower-most supported record is released from its supported position, and means for driving said cam means.

5. A record-changing apparatus comprising a fixed centering pin, first movable means on said pin for supporting a stack of records by engaging edge portions at the centering aperture of the lower-most supported record, means for engaging the top-supported record for balancing the stack of records in supported position, a. reduced-portion on said pin in the plane of the second lower-most supported record, second movable means for moving the second lower-most supported record into supporting position with said reduced portion, cam means for successively moving said second movable means and permitting said first movable means to move out of supporting position whereby the lower-most supported record is released from its supported position, and means for driving said cam means.

6. A record-changing apparatus comprising a fixed centering pin, a pair of movable members on said pin positioned diametrically opposite thereto for supporting a stack of records by engaging edge portions at the centering aperture of the lower-most supported record, a reducedportion on said pin in the plane or the second lower-most supported record, movable means associated with said pin for moving the second lower-most supported record into supporting position with said reduced-portion, cam means for successively moving said movable means and permitting said pair of movable members to move out of supporting position whereby the lowermost supported record is released from its supported position, and means for driving said cam means.

7. A record-changing apparatus comprising a tubular spindle, first movable means on said spindle for supporting a stack of records by engaging edge portions at the centering aperture of the lower-most supported record, a reduced-portion on said spindle in the plane of the second lower-most supported record, second movable means associated with said pin for moving the second lower-most supported record into supporting position with said reduced-portion, cam means rotatable in said spindle for successively moving said second movable means and permitting said first movable means to move out of supporting position whereby the lower-most supported record is released from its supported position, and means for driving said cam means.

8. A record-changing apparatus comprising a fixed centering pin, first movable means on said pin for supporting a stack of records by engaging edge portions at the centering aperture of the lower-most supported records, means for engaging the top supported record for balancing the stack of records in supported position, a reduced-portion on said pin in the plane of the second lower-most supported record, second movable means associated with said pin for moving the second lower-most supported record into supporting position with said reduced-portion,

v cam means for successively moving said second movable means and permitting said first movable means to move out of supporting position whereby the lower-most supported record is released from its supported position, and means for driving said cam means.

9. A record-changing apparatus comprising a tubular spindle, a pair of movable members on said spindle positioned diametrically opposite thereto for supporting a stack of records by engaging edge portions at the centering aperture of the lower-most supported record, a reduced-portion on said spindle in the plane of the second lower-most supported record, movable means for moving the second lower-most supported record into supporting position with said reduced-portion, cam means rotatable in said spindle for successively moving said movable means and permitting said pair of movable members to move out of supporting position whereby the lower-most supported record is released from its supported-position, and means for driving said cam means.

10. A record-changing apparatus comprising a fixed centering pin, a pair of movable members on said pin positioned diametrically opposite thereto for supporting a stack of records by engaging edge portions at the centering aperture of the lower-most supported record, means for engaging the top-supported record for balancing the stack of recordsin supported position, a

reduced-portion on said pin in the plane of the 7 second lower-most supp t d rec rd. movable means for moving the second lower-most supported record into supporting position with said reduced-portion, cam means for successively moving said movable means and permitting said pair or movable members to move out of supporting position whereby the lower-most supported record is released from its supported position, and means for'driving said cam means.

11. A record-changing apparatus comprising a tubular spindle, first movable means on said spindle for supporting a stack of records by engaging edge portions at the centering aperture of the lower-most supported record, means for engaging the top-supported record for balancing the stack 01' records in supported position, a reduced-portion on said spindle in the plane of the second lower-most supported record. second movable means for moving the second lowermost supported record into supporting position with said reduced-portion, cam means rotatable in said spindle for successively moving said second movable means and permitting said first movable means to move out of supporting position whereby the lower-most supported record is released from its supported position, and means for driving said cam means.

12. A record-changing apparatus comprising a tubular spindle, a pair of movable members on said spindle positioned diametrically opposite 'thereto for supporting a stack of records by engaging edge portions at the centering aperture of the lower-most supported record, a reducedportion on said spindle in the plane of the second lower-most supported record, movable means associated with said spindle for moving the second lower-most supported record into supporting position with said reduced-portion, cam means rotatable in saidspindle for successively moving said movable means and permitting said pair of movable members to move out of supporting position whereby the lower-most supported record is released from its supported position, and means for driving said cam means.

13. A record-changing apparatus comprising a fixed centering pin, a pair of movable members on said pin positioned diametrically opposite thereto for supporting a stack of records by engaging edge portions at the centering aperture of the lower-most supported record, means for engaging the top-supported record for balancing the stack of records in supported position, a reduced-portion on said pin in the plane of the second lower-most supported record, movable means associated with said pin for moving the second lower-most supported record into supporting position with said reduced-portion, cam means for successively moving said movable means and permitting said pair of movable members to move out of supporting position whereby the lower-most supported record is released from its supported position, and means for driving said cam means.

14. A record-changing apparatus comprising a tubular spindle, first movable means on said spindle for supporting a stack of records by engaging edge portions at the centering aperture oi! the lower-most supported record, means for engaging the top-supported record for balancing the stack of records in supported position, a reduced-portion on said spindle in the plane of the second lower-most supported record, second movable means associated with said spindle for moving the second lower-most supported record into supporting position with said reducedportion, cam means rotatable in said spindle for successively moving said second movable means and permitting said first movable means to move out of supporting position whereby the lowermost supported record is released from its supported position, and means for driving said cam means.

15. A record-changing apparatus comprising a tubular spindle, a pair of movable members on said spindle positioned diametrically opposite thereto for supporting a stack of records by engaging edge portions at the centering aperture of the lower-most supported record, means for engaging the top-supported record for balancing the stack of records in supported position, a reduced-portion on said spindle in the plane of the second lower-most supported record, movable means for moving the second lower-most supported record into supporting position with said reduced-portion, cam means rotatable in said spindle for successively moving said movable means and permitting said pair of movable members to move out of supporting position whereby the lower-most supported record is released from its supported position, and means for driving said cam means.

16. A record-changing apparatus comprising a tubular spindle, a pair of movable members on said spindle positioned diametrically opposite thereto for supporting a stack of records by engaging edge portions at the centering aperture of the lower-most supported record, means for engaging the top-supported record for balancing the stack of records in supported position, a reduced-portion on said spindle in the plane of the second lower-most supported record, movable means associated with said spindle for moving the second lower-most supported record into supporting position with said reduced-portion, cam means rotatable in said spindle for successively moving said movable means and permitting said pair of movable members to move out of supporting position whereby the lower-most supported record is released from its supported position, and means for driving said cam means.

17. Record-changing apparatus comprising a centering pin, first movable means on said pin for supporting a stack of records by engaging an edge portion at the centering aperture of the lowermost supported record, a reduced portion on said pin in the plane of the second lowermost supported record, a second movable means for moving the second lowermost supported record into supported position with said reduced portion, and movable cam means operatively associated with said first and second movable means for successively moving said. second movable means and permitting said first movable means to move out of supported position whereby the lowermost supported record is released from its supported position.

HARVEY C. HABEGGER,

CERTIFICATE OF CORRECTION.

Patent No. 87,098. June 5, 1911.

HARVEY C. HABEGGER.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 5, sec- 0nd column, line' claim 1, strike out "movable"; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 1st day of September, A. D. 1911,

' Henry Van Arsdale, (Seal) Acting Commissioner of Patents.