US2138346A - Phonograph record shaving machine - Google Patents

Description

Nov. 29, 1938. s. G. LANGLEY 2,138,346

PHONOGRAPH RECORD SHAVING MACHINE Filed March 3, 1938 2 Sheets-Sheet l INVENTOR Sam; G. Langley f -aim,

T OR NEY s. G. LANGLEY 2,138,346

PHONOGRAPH RECORD SHAVING MACHINE Nov. 29, 1938.

Filed. March 3, 1938 2 Sheets-Sheet 2 INVENTOR Sam G.La ng"ley BY & LAW

TORNEY Patented Nov. 29, 1938 UNITED STATES PHONOGRAPH RECORD SHAVING MA- CHINE Sam G. Langley, Maplewood, N. J., assignor to Thomas A. Edison, Incorporated, West Orange, N. .L, a corporation of New Jersey Application March 3, 1938, Serial No. 193,640

26 Claims.

This invention relates to machines for shaving phonograph records, and more particularly to the provision of automatically operated means in such machines for facilitating the operation of shaving or resurfacing phonograph records of the type intended for use with dictating machines.

The commercial phonograph, or dictating machine, employs records which are usually cylindrical in form and made of wax-like material. In the operation of recording dictation there is formed on the surface of the record a progressive modulated groove. These recordations are seldom meant to be preserved permanently, but are rather intended to be transcribed from, after which the record is prepared for. re-use by a process of resurfacing which involves the shaving off of a surface layer of the record material of an over-all thickness that is at least equal to the maximum groove depth.

Since such records are usually resurfaced for re-use after each operation of recording thereon, it is desirable to have conveniently operable meansfor effecting the resurfacing of the records. The operation of resurfacing a phonograph record requires a plurality of manipulations, some of which may be automatically performed incidental to others. According to my invention, I utilize effects which occur incidental to the performance of some of the manipulations for effecting other operations or adjustments normally manually performed in the use of the machine. It is a further feature of my invention to utilize such incidental effects for maintaining the proper sequence in some of the operative manipulations of the machine so as to insure its safe operation.

It is an object of my invention to provide new means in record shaving machines for facilitating the shaving operation.

It is another object to provide new automatically operated means for reducing the number of adjustments or manipulations required in the use. of a phonograph record shaving machine.

It is another object to provide, in phonograph record shaving machines, means energized incidental to the operation of conditioning the machine for a resurfacing operation, for moving the resurfacing tool out of operative position.

It is another object to provide, in phonograph record shaving machines, automatically operated means for effecting the movement of the resurfacing tool out of operative position only when the machine is otherwise in inoperative condition.

It is a further object to provide, in phonograph record shaving machines, means operable by a movement of the mandrel while the mandrel rotating means is inoperative for automatically effecting an adjustment or manipulation required in the operation of the machine. 6'

It is a still further object to provide, in phonograph record shaving machines, means for preventing the rotation of the mandrel, as by the mandrel rotating means provided therefor, while the mandrel is out of normal operative position. Other objects of my invention will be apparent from the following description and claims.

In the description of my invention reference is had to the accompanying drawings, of which: Figure 1 is a top plan view of a phonograph record shaving machine showing the resurfacing tool in operative position and illustrating a form of my invention as applied thereto; Y

Fig. 2. is a vertical cross-sectional View taken along the line 2--2 of Fig. 1; 20 Fig. 3 is a vertical cross-sectional view taken along the line 33 of Fig. 2; I

Fig. 4 is a vertical cross-sectional view of a portion of the machine of earlier figures, taken along the line 4-4 of Fig. 1; 25

Fig. 5 is a view generally similar to Fig. 4, but illustrating a modification of my invention; and

Fig. 6 is a vertical cross-sectional view taken along the line 6-6 of Fig. 5. 30 Reference being had to Figures 1, 2 and 3, there will be seen a form of phonographrecord shaving machine in which my invention is preferably employed. This machine comprises a base plate I which is secured to a top plate I by means of the screws l". The plate I has a. reenforcing ribZ, left- hand standards 3 and 4, right-hand standards 5 and 6, and an intermediate standard 'I In the standard 3 there is provided a conically pointed stud 8 which engages a recess in the left end of a shaft 9, thereby providing a thrust bearing for the shaft. The shaft 9 passes. through an oversized hole I (I in the standard 1 and is provided with a mandrel ll for holding a suitable record to be resurfaced. The right end of the shaft 9 is supported by means of an end-gate I2 carrying an adjustable conical stud [3 adapted to engage a recess in the right end of the shaft 9 and be biased thereagainst.

In order that the right end of the mandrel I] may be -made free for slidably mounting a record [4 thereon, or for the removal of a record therefrom, the end-gate I2 is pivoted to a boss I5 on the base plate I so that it may swing outwardly from its supporting position to a non-supporting position wherein it is free of the right end of the mandrel. The end-gate I2 is closed, or moved from its non-supporting position to its supporting position, by a clockwise movement about its pivot until its forward extremity strikes against the right end of a guide rail IS, in which position it may be releasably held by a suitable latch l'l.

When the end-gate i2 is in its supporting position the mandrel ll is rotatably supported in an operative position with substantially no end play by reason of the stud I3 being biased against the right end of the shaft. In suchYoperative position, the mandrel l l is in true parallel relation with respect to the guide rail It. For rotating the mandrel there may be provided any suitable rotatory source of power such as an electric motor (not shown) which may be coupled, as by means of a belt l8, to a pulley 19 secured to the shaft 9, a suitable slot 23 being provided in the base plate I through which may pass the belt iii. For controlling the operation of such a motor there is provided a suitable electric switch 2! which is secured to the plate I by the screws 2| and which is normally operable to on and off positions, by means of an arm 22, for respectively rendering the motor operative and inoperative.

Supported by the left and right standards 3 and 5 is a longitudinal rod 23 which is in parallel relation with the guide rail l6 and on which there is slidably'and tiltably mounted a carriage 24. The carriage is provided with an approximately semi-circular and forwardly extending arm portion 25 which is adapted to slidably engage, at its forward lower extremity, with the guide rail Hi, this engagement being made secure by the provision of a weight or ball portion 25 preferably integrally formed withv the arm portion 25. V

The carriage 24 is also provided with a boss 26 in which there is adjustably mounted a resurfacing tool 21. This tool is adapted to be brought into operative position with respect to the record so as to cut away a surface layer of the record materialas the record is rotated and the carriage 24 is steadily moved transversely of the direction of record rotation. In order that such transverse movement may be imparted to the carriage by the rotation of the mandrel H, the carriage is provided with a sleeve portion to which issecured a resilient arm 28 carrying a feed nut 29. When the carriage 22 is in itsnormal lowered positionwith the arm 25 resting on the guide rail [6, the feed nut 29 engages the lower portion of a feed screw 30 rotatably held in the left and right standards 4 and 6. The 'feed screw 30 is provided with. a pulley 3'! which is coupled by means of a belt 32 to a pulley 33 secured to the shaft 9 so that rotation of the mandrel II will cause a rotation of the feed screw 30 to effect thereby a longitudinal movement of the carriage 24 with respect to the mandrel H and the record l4 supported thereon. By this arrangement it is obvious that an upward tilting movement of the arm 25 will cause the resurfacing tool 21 to be moved out of engagement with the record l4, and the feed nut 29 to be similarly moved outof engagement withthe feed screw 30, thereby permitting the carriage to. be manually moved, at will, along the record l4.

The resurfacing tool 21 comprises a knife bar 34 carrying at its inner or lower end a knife blade 35. The knife bar 34 is slidably mounted in an opening 35 which extends through the boss 26. The outer or upper end portion 31 of the knife bar is reduced in diameter and extends loosely through the top 38 of a hollow cap 39, upward or rearward movement of this cap with respect to the knife bar 34 being limited by a head 40 provided on the extremity of the knife bar. A coil spring 4| is disposed about the reduced diameter portion of the knife bar 34 between a collar 42 pinned to the bar and the top wall 38 of the cap 39. Rearward or upward movement of the knife bar 34 is limited by the engagement of a collar 43, secured to the inner end portion of'the knife bar by a set screw 44, with the lower or inner end of the boss 26.

A guide rod 45 is slidably mounted in an opening 46 which extends through the boss 26, the opening 46 being parallel to the opening 36 in which the knife bar is disposed. At its upper or rear end the rod 45 is secured to the top 38 of the cap 39 by a headed screw 47. The rod 45 is therefore moved with the cap 39 towards and away from the mandrel ll whenever the resurfacing tool .21 is moved to operative and inoperative positions with respect to the record l4. In order that the resurfacing tool 27 willnormally tend to remain in inoperative position the cap 3.9 is biased upwardly by means of a coil spring 45' which is disposed about the guide rod 45 between the top wall 38 of the cap 39 and the upper side of the boss 26..

For moving the resurfacing tool to operative and inoperative positions with respect to the record l4, there is provided an actuating lever 48. which is pivotally mounted on the boss 26 and which comprises a long arm having a short arm extension 49 substantially at right angles to the. long arm. The lever 48 and cap 39 are connected by means of a link member 50 which is pivotally connected at one end to the arm 49 by a shoulder screw or pivot 5|, and at its other end to the cap 39 by means. of a pivot 52 comprising a shoulder screw threaded into the wall of the cap. The lower portion of the link member. 50 has a gooseneck form or shape so that the latter will remain clear of the hub of the lever. H

48 as the lever is manipulated in the setting of the resurfacing tool. However, the gooseneck portion is adapted to engage the hub of the lever 48 to limit the forward movement of the lever to a position in whichthe axis of its pivotal connection to the link member 53' is slightly past dead center with respect to the pivotal axis of the lever 43 and the pivot 52. Itwill therefore be apparent that the lever 48 is releasably locked when it has reached the limit of its forward movement, as shown in Figure 2, by reason of the upward biasing force exerted upon the cap 39 by the springs 4i and 45.

The moving of the resurfacing tool 21 to operative position with respect to the record I4 is eifected by imparting a downward swinging movement to the lever 48. Such downward swinging movement causes the cap 39 to be moved downwardly, thereby yieldingly moving the knife bar 34 downwardly, as by the spring 4!, so that the knife blade 35 isbrought into engagement with the record l4. The knife blade 35 will thus be pressed a short distance into the material of the record, this distance depending upon the compliance of the spring 4| and the adjustment of the collar 42.' The tool setting mechanism is adapted to bring the knife blade 35 into an operative position with respect to the record l4 before the actuating lever 48 has reached the limit of its downward swinging movement. The next further downward swinging movement of the lever 48 then effects a clamping or locking of the knife bar 34 so that it is effectively held in operative position whenever the lever 48 has reached the end portion of its downward travel. The detailed mechanism for effecting the clamping of the knife bar 34, which'may for example be of a form such as is disclosed in a copending application of Thomas C. Brown, Serial Number 164,280, and filed September 1'7, 193'? is not herein necessary to show.

It will be understood that the downward movement of the cap 39 causes a considerable compression of the spring 45 and at least a slight compression of the spring 4|. Such compression results in the storage of considerable potential energy, which energy imparts an upward force upon the cap 39 to lock the lever 48 in its most downward position, in which position the pivot is past the aforementioned dead center line. It will be further understood that a slight upward swinging movement imparted to the lever 48 to return the pivot 5| to a position before the said dead center line will effect the release of such stored energy, thereby causing the cap 33 with its associated parts to be moved upwardly so that it may effect the release of the aforementioned knife bar clamping means and the restoration of the resurfacing tool 21 to its inoperative position. It will thus be obvious that the resurfacing tool is set in operative position by the manipulation of the lever 48 to its most downward position, such manipulation effecting the storage of potential energy which operates to releasably hold the lever 43 in such downward position, and that by imparting a light upward tripping movement to the lever 48, the stored energy is released to move the resurfacing tool to its inoperative position.

After a record has been resurfaced the sequence of manipulations to be performed for effecting another resurfacing operation comprises the restoration of the resurfacing tool to its inoperative position and the removal of the resurfaced record from the mandrel. By reason of the use of conical bearings for supporting the record-supporting mandrel-the need for which has been hereinbefore described-and the removal of one of these bearings from a supporting position to free an end of the mandrel for permitting the removal of a record therefrom, the mandrel tends and is in practice permitted to fall substantially in translation, a predetermined extent to inoperative position. In such inoperative position of the mandrel, the shaft 9 rests on the bottom side of the oversized hole l9 provided in the standard I. In order that the stud 8 may be suitably maintained in engagement with the left end of the shaft 9, when the mandrel is in such inoperative position, there is provided on the shaft 9 a collar 53 which is adapted to abut against the left side wall of the standard 1 and thereby limit the longitudinal movement of the shaft. Thus the extent of the fall'of the mandrel is controlled by the size of the hole I0 provided in the standard I.

According to my invention this .fall of the mandrel, which is incidental to the removal of a record therefrom, is employed to perform or effect other useful operations or adjustments. One such operation, for example, is the restoration of the resurfacing tool to its inoperative position, in order to facilitate the operation of the shaving machine. Another such operation is the actuation of suitable means for preventing the rotation of the mandrel, as by the mandrel rotating means provided therefor, whenever the mandrel is out of its normally operative position. In my invention I effect such automatic adjustments and/or control of the shaving machine by simple means actuated incidental to the fall or movement of the mandrel out of normal operative position. The means for effecting such automatic adjustments and/or control of the machine, together with a modified form, are now described in detail.

The means for effecting the automatic release of the resurfacing tool 21 is adapted to be actuated by a member which engages the shaft 9 of the mandrel I at a position adjacent to the intermediate standardv i. This is a particularly convenient place for locating such a member, but it will be understood that according to my invention these automatic control means may be cperatively associated with the shaft 9 at any suitable place such, for example, as at its right end where there normally occurs the greatest movement of the shaft. For normal fall of the mandrel 9 the engagement of the conical stud I3 with the recess in the right end of the shaft, as the end-gate I2 is moved to its supporting position, is relied upon to effect the upward movement of the mandrel H to its normal operative position. When these automatic control means are operatively associated with the shaft 9 at an intermediate point thereof, it is desirable to permit the shaft ii to move a greater extent than would be otherwise customarily permitted, as by the enlargement of the hole Hi in the standard I. In order then to properly restore the mandrel to operative position there is provided an angularly extending cup member 54 on the end-gate l?! which is adapted to engage with the right end of the shaft 9, as the endgate I2, is closed, and move the same upwardly towards its operative position before the stud l3 engages with the shaft. The engagement of the stud it with the recess in the end of the shaft 9 is then relied upon to complete the movement of the mandrel to its operative position as the end-gate I2 is closed or moved to its supporting position.

Beneath the mandrel N there is provided a suitable opening 55 in the base plate I in order that the shaving chips may fall downwardly therethrough and be collected by suitable means (not shown) located under the base plate. Ex-

tending downwardly through this opening is a lever member 58 which is pivotally connected to the intermediate standard I by means of a shoulder screw 51. The member 55 is provided with an upwardly extending and forked portion which is adapted to engage the lower portion of the shaft 9, this forked portion being biased against the shaft by means, of a spring 58. The member 56 has a lower rearwardly extending arm portion 59 which is adapted to impart parallel movement, ina vertical direction, to a barliil which is supported at its ends by parallel motion links 6| and 62. These links are adapted for pivotal movement at their lower ends, by means of the respective shoulder screws 53 and 64 threaded into the plate I, and at their upper ends by sim- .ilar screws threaded in the shanks of spacing rivets 65 and 5% secured to the bar 6i]. For effecting the movement of the bar til the lefthand link iii is provided with an off-set extension 6| which engages with the top edge of the arm portion 59. Thus as the mandrel H is permitted to move downwardly the member 55 will be moved in a counterclockwise direction about the. shoulder screw 57 to cause the arm 59 to move upwardly, such upward movement of the arm 59 causing the bar 68 to be moved upwardly.

Referring particularly to Figures 2 and 3, therewill be seen a lever 81 pivotally mounted on a rear projection 24' of the carriage 24 by means of a shoulder screw 68. The lever 87 has an upper arm 69 which extends laterally and then forwardly to come into engagement with the underside of a pin 18 carried by the lever 48, the pin'IO extending laterally of the lever 48 and being located forwardly with respect to the pivoting axis of this lever when the lever is in its most downward position. The lever 81 also has a lower arm II which extends downwardly and forwardly so as to overlie the bar 88. By this arrangement it is obvious that an upward movement of the bar 68, such as would be caused by a downward movement of the mandrel Ii, will cause an upward or clockwise movement of the lever 48. As hereinbefore described, a slight clockwise movement of the lever 48 will cause the pivot 5i to be moved over the dead center line determined by the pivotal axis of the lever 48 and the pivot 52, thereby releasing the lever 48. to cause the resurfacing tool to be moved to inoperative position.

In order that the mandrel II may not be set in rotation, as by the mandrel-rotating means, while the mandrel is in inoperative position, I provide means which operate to lock the switch 2| in off position as the mandrel II is in its downward o-r inoperative position. For this reason there is provided, at the right front portion of the base plate I, a supporting member 1| which is secured to the reenforcing rib 2 by the screws I2 (see Figures 2 and 3). Journalled in the supporting member II is a shaft I3, carrying at its forward end a crank member M which projects,

through a slot 75, upwardly and forwardly of the base plate I, and is adapted to engage, by means of a socket portion I8, the upper end of the switch arm 22. The socket portion 18 fits fairly snugly over the end of the arm 22, and affords a ready grip for an operator to grasp and move it to cause the arm 22 to effect the on and off positions, of the switch 2|. Secured to the rearward end of the shaft 13, as by means of the collar 11, is an upwardly extending arm I8 which is pivotally connected, as by a shoulder screw 19, to a bar 88. The bar 88 extends leftwardly along the base plate I and is provided with a longitudinal slot 8| at its other end portion so that it may be slidably supported by means of a shoulder screw 82 extending through the slot 8| and threading into the base plate I. Thus it is apparent that the bar 88 will slide leftwardly and rightwardly as the switch 2! is operated to its respective on and off positions.

Provided on the member 55 is a forwardly extending arm 83 which overlies the left end portion of the bar 88, in which end portion there is provided a shoulder 84. When the mandrel II is in its upward or operative position, the arm 83 is in its upward position, so that it rides over the shoulder 84 to permit the switch 2I to be operated to its on position. However, when the mandrel II is in its downward or inoperative position the arm 83 is in its downward position so that it will abut against the shoulder 84 whenever an attempt is made to operate the switch 2| from its off position to its on position, the arm 83 being supported laterally by having its forward end portion slidably engaging a vertical slot 85 provided in the reen forcing rib 2. The abutment of the shoulder 84 against the arm 83 prevents the operator from starting the mandrelrotating means. As a result the operation of the machine is safeguarded in that the mandrel II is prevented from being set in rotation whenever it is in its inoperative position.

In Figures 5 and 6 there is shown a modified form of my invention. In this modified form the parallel bar 68 is moved upwardly incidental to the fall of the mandrel II by electro-mechanical means. Such means comprise a suitable electromagnet 86 having an armature 81 which is propelled rightwardly, as shown in Figure 6, with sliding movement whenever the electromagnet is energized. The armature 8'! is pivotally connected, as by a shoulder screw 88, to a downwardly extending arm 89 of a link member 98 which serves in place of the link member 6| of my first embodiment. Thus as the electromagnet' 8G is energized the parallel bar 68 is moved upwardly to cause the resurfacing tool 21 to be moved to inoperative position as hereinbefore described. When the electromagnet 88 is unenergized, the parallel bar 88 is moved downwardly by means of a suitable spring such as 9|.

In order that the electromagnet 86 may be operated incidental to the fall or downward movement of the mandrel II to inoperative position, there is provided a member 92, in place of the member 58 of my first embodiment, pivotally mounted on the standard I and having an upwardly extending and fork shaped portion 93 held in engagement with the shaft 9 by means of a spring 94. The member 92 has a lower forwardly extending arm 95 which is similar to the arm 83 of my first embodiment except for having a portion 98 of increased width. Secured, as by the screws 91, to the base plate I is a bracket 88 which supports in cantilever fashion the upper and lower springs 99 and I88 of an electrical switch I8I. These springs are insulatedly mounted one above the other by means of the insulation pads I82 which are held in place by the screw I82. Near the forward ends of these springs there are provided suitable electrical contact points 99 and I88 which are adapted to come into engagement as the upper spring'99 is moved downwardly. The springs 99 and I88 are serially connected in a line I 83 which is adapted to supply the power for energizing the electromagnet 88, the line I83 being provided with a plug I 84 for making connection with a suitable source of power.

The spring 99 is provided with an insulating pad 485 at its forward end which biasingly engages the portion 96 of increased width of the arm 95. The contact points 99' and I88 are normally open; therefore, as the arm 95 moves downwardly, as by the downward movement of the mandrel, the spring 99 is moved downwardly to cause the contact points 99 and I 88' to close, thereby closing the line I83 which supplies the power to the electromagnet 86. Thus the downward movement of the mandrel II will effect an upward movement of the bar 88 to cause the resurfacing tool to be moved out of operative position, as the mandrel II is restored to operative position the bar 68 will be moved to its down ward position to permit the resetting of the resurfacing tool. Moreover, as the arm 95 is in its downward position it will abut against the shoulder 84 of the bar 88 whenever it is attempted to operate the switch 2| from its 01f position to its on position, thereby preventing the combination of a mandrel for supporting a record movable from a normal operative position; means for controlling the movement of said mandrel; a resurfacing tool; means for setting the tool in operative position with respect to a supported record when said mandrel is in operative position; and means for moving said tool out of operative position as an incident to the movement of the mandrel from its normal operative position.

2. In a phonograph record shaving machine, the combination of a rotatable support for a record movable substantially in translation from a normal operative position; means for controlling the movement of said support; a resurfacing tool; means for setting the tool in operative position with respect to a supported record; and means operatively associated with said record support for automatically moving said resurfacing tool out of operative position in response to the translational movement of said record support. a

3. In a phonograph record shaving machine, the combination of a'mandrel for supporting a record, said mandrel being movable downwardly substantially in translation to an inoperative position; a resurfacing tool; means for setting the tool in operative position with respect to a supported record; and means for moving the tool out of its operative position as an incident to the downward translational movement of the mandrel.

4. In a phonograph record shaving machine, the combination of a record-supporting mandrel rotatable about its longitudinal axis and otherwise movable from a normal operative position; a resurfacing tool; means for setting the tool in operative position; and means operatively associated with said mandrel for automatically moving said resurfacing tool out of operative position in response to the movement of said mandrel from said normal operative position.

5. In a phonograph record shaving machine, a mandrel for supporting a record; a movable end-gate; a resurfacing tool movable to an operative position with respect to a supported record; means for imparting upward movement to said mandrel incidental to the operation of moving said end-gate to a supporting position; and means, actuated by the gravity acting on said mandrel, for moving said tool out of operative position incidental to the operation'of moving said end-gate out of a mandrel-supporting position.

6. In arphonograph record shaving machine, a mandrel for supporting a record; an end-gate movable to a mandrel-supporting position; a resurfacing tool movable to an operative position with respect to a supported record; means for imparting an upward movement of predetermined extent to said mandrel as said end-gate is moved through a portion of its travel; means for effecting further upward movement of said mandrel to operative position as said end-gate is moved through the remaining portion of its travel; and means, actuated by the downward movement of said mandrel as said end-gate is moved out of said supporting position, for moving said resurfacing tool out-of operative position.

'7. In a phonograph record shaving machine, the combination of a record-supporting mandrel movable from its normal operating position; mandrel-rotating means; control means for rendering said rotating means operative; a resurfacing tool; tool-locking means; means for releasing the tool-locking means incidental to the movement of said mandrel; and means for locking said mandrel against said movement whilev said rotating means is in operation.

8. In a phonograph record shaving machine, the combination of a record-supporting mandrel movable from its normal operative position; mandrel-rotating means; control means for rendering said rotating means operative and inoperative; a resurfacing tool; tool-locking means; means for releasing the tool-locking means incidental to the movement of said mandrel while said rotating means is inoperative; and means for locking the means for releasing said toollocking means while said rotating means is operative.

9 In a phonograph record shaving machine, the combination of a record-supporting mandrel rotatable about its longitudinal axis and otherwise movable from a normal operative position; mandrel-rotating means; control means for rendering said rotating means operative; a resurfacing tool movable to an operative position; means for moving the resurfacing tool out of operative position incidental to the movement of the mandrel from said normal operative position; and means for locking said mandrel against movement from said operative position while said rotating meansis operative. y

10. In a phonograph record shaving machine,

' the combination of a rotatable record-supporting mandrel movable to and from normally operative position; means for moving said mandrel to, and for holding the same in, operative position; mandrel rotating means; control means for rendering said rotating means operative; a resurfacing tool movable to operative position; means for effecting themovement of the resurfacing tool out of operative position incidental to the movement of the mandrel from its operative position; and means to prevent the rotation of said mandrel by said rotating means while said mandrel is outof operative position.

11. In a phonograph record shaving machine, the combination of a record-supporting mandrel rotatable about its longitudinal axis and otherwise movable from normal operative position; mandrel rotating means ;'control means for rendering said rotating means operative; and means for locking said control means while said mandrel is out of operative position.

12. In a phonograph record shaving machine the combination of a rotatable record-supporting mandrel movable to operative and inoperative positions and biased towards said inoperative position; means for moving said mandrel to, and for holding the same in, operative position; mandrel rotating means; control means for said rotating means; and means to prevent the rotation of said mandrel by said rotating means While said mandrelis out of operative position.

13. In a phonograph record shaving machine, the combination of means having operative and inoperative positions for supporting a record; a resurfacing tool; means for setting the tool in operative position with respect to a supported record; means for storing potential energy incidental to the operation of putting the recordsupporting means in operative position for the resurfacing of said supported record; and means for utilizing .said energy to move said resurfacing tool out of operative position.

14. In a phonograph record shaving machine,

the combination of a record-supporting mandrel; mandrel-supporting means movable into supporting and non-supporting positions; a resurfacing tool; means for setting the tool in operative position with respect to a record on said mandrel; means for storing potential energy incidental to the operation of moving said mandrel-supporting means into its supporting position; and means, operated by said energy incidental to the movement of said mandrel-supporting means to its non-supporting position, for moving said resurfacing tool out of operative position.

15. In a phonograph record shaving machine, the combination of means having operative and inoperative positions for supporting a record; a resurfacing tool; means for setting the tool in operative position with respect to a supported record; means for storing potential energy of position in the record-supporting means incidental to the operation of putting the same in operative position for the resurfacing of said supported record; and means for utilizing said energy to move said resurfacing tool out of operative position.

16. In a phonograph record shaving machine, a system comprising a rotatable record support movable into and out of operative position, and a movable end-gate for said support; a resurfacing tool movable to an operative position with respect to a supported record; means for storing potential energy in said record support incidental to the operation of putting said system in operative condition for the resurfacing of said record; and means, actuated by the potential energy stored in said support, for moving said resurfacing tool out of operative position as said system is put out of operative condition.

17. In a phonograph record shaving machine, the combination of a record-supporting mandrel movable for storing potential energy of position therein; means for releasing said energy comprising movable mandrel-supporting means; a resurfacing tool movable to operative position; means for storing potential energy incidental to the movement of said resurfacing tool to operative position; and means, actuated by the energy stored in said record-supporting mandrel, for releasing the energy stored by themovement of said resurfacing tool to operative position to cause said tool to be moved out of operative position.

18. In a phonograph record shaving machine, the combination of a mandrel for supporting a record; an end-gate capable of imparting upward movement to one end of said mandrel incidental to its movement to a supporting position; a resurfacing tool movable to operative and inoperative positions with respect to a supported record; tool-locking means for holding said tool in its operative position; means operatively asso ciated with said mandrel for releasing said toollocking means incidental to the movement of said end-gate from its supporting position; and means energized incidental to the movement of said tool to its operative position for moving the same to its inoperative positionupon the release of said tool-locking means.

19. In a phonograph record shaving machine, the combination .of a record-supporting mandrel movable from an operative position; a resurfacing tool movable to operative position with respect to a supported record when said mandrel is in operative position ;-means for storing potential energy incidental to. the operation of moving said mandrel and tool to their respective operative positions; means actuated by the energy stored by the movement of said mandrel to operative position for releasing the energy stored by the movement of said tool to operative position; and means actuated by said released energy for effecting the movement of said resurfacing tool to inoperative position.

20. In a phonograph record shaving machine, the combination of a record-supporting mandrel movable to and out of a normally operative position for effecting the storage of potential energy therein while in said operative position; a resurfacing tool movable to operative and inoperative positions; tool-locking means for holding said tool in its operative position; means, actuated .by the energy stored in said mandrel, for releasing said tool-locking means; and means energized incidental to the movement of said tool to its operative position for moving said tool to its inoperative position upon the release of said tool-locking means.

21. In a phonograph record shaving machine, the combination of a movable mandrel for supporting a record; mandrel-supporting means movable to and out of a supporting position; a resurfacing tool movable to an operative position with respect to a supported record; and

electro-mechanical means for moving said resurfacing tool out of operative position incidental to the operation of moving said mandrel-supporting means out of operative position.

22. In a phonograph record shaving machine, the combination of a record-supporting mandrel movable to an inoperative position; a resurfacing tool movable to a position operative with respect to a supported record when said mandrel is in operative position; an electromagnet for moving said tool out of operative position; and means operated by the movement of said recordsupporting mandrel to inoperative position for actuating said electromagnet.

23. In a phonograph record shaving machine, the combination of a record-supporting mandrel movable to and out of operative position; man: drel-supporting means movable to and out of supporting position; a movable resurfacing tool; manually operable means for moving said tool in operative position with respect to a supported record; tool-locking means; an electromagnet for controlling .said tool-locking means; and switch means operated by the movement'of said mandrel for controlling said electromagnet.

24. In a phonograph record shaving machine, the combination of a mandrel for supporting :a record, said mandrel being movable to and out of operative position; supporting means movable to' a position for holding said mandrel in operative position; a resurfacing tool movable to a position operative with respect to a supported record when said mandrel is in operative position; an electromagnet for effecting movement of said tool out of operative position; and switch means operated by the movement of said mandrel for controlling said electromagnet.

25. In a phonograph record shaving machine, the combination of a record-supporting mandrel movable to operative and inoperative position; a movable resurfacing tool; tool-locking means for holding said. tool in operative position; an electromagnet for releasing said tool-locking means; and switch means controlling said electromagnet for effecting the release of said tool-locking means incidental to the operation of moving said mandrel out of operative position.

26. In a phonograph record shaving machine,

the combination of a movable record-supporting mandrel; means for moving said mandrel and maintaining the same in operative position; mandrel rotating means; control means for rendering said mandrel-rotating means operative; a resurfacing tool movable to operative position; an electromagnet for effecting movement of said tool out of operative position; switch means operated by the movement of said mandrel for controlling said electromagnet; and means for preventing the operation of said switch means while said mandrel rotating means is operative.

SAM G. LANGLEY.

Images