US1927167A - Mechanism for shaving cylindrical record tablets - Google Patents

Description

Sept. 19, 1933. w. s. FRIDELL MECHANISM FOR SHAVING CYLINDRICAL RECORD TABLETS 2 sheets-sheet 1 Filed Feb. 5, 1932 57 Z6 J Z7 Pfg. 2

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A TTORNEY Sept. 19, 1933. w. s. FRIDELL MECHANISM FOR SHAVING CYLINDRICAL RECORD TABLETS Filed Feb. 5, 1932 2 Sheets-Sheet 2 INVENTOR. Willis 5. Frz'dell.

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A TTORNEY Patented Sept. 19, 1933 PATET FFiCE vMCHANISM( FOR SHAVING CYLINDRICAL RECORD TABLETS Willis S. Fridell, Washington, D. C., assignor to Thomas A. Edison, Incorporated, West Orange, N. J., a corporation of New Jersey Application February 5,

14 Claims.

This invention relates to improvements in the mechanism for shaving cylindrical record tablets such, for example, as those used on commercial phonographs.

In the conventional form of shaving machine for such record tablets, the part carrying the knife, must be pressed down by the operator against the wax cylinder, a spring being interposed between the knife and the point at which pressure is applied to Jcarry it into engagement with the surface of the cylinder. This pressure or tension must be maintained until the knifebar is locked in position by separate levers and clamping means provided for the purpose.

My present improvement is directed to an improved form of knife-supporting, setting, and locking mechanism, and it is therefore the principal object of my invention to provide a' knifebar and controlling'mechanism therefor which is more automatic in its operation than the designs now in use.

Another object of my improvement is to provide a mechanism which will obviateithe necessity for taking a second cut or a plurality of cuts across the surface of the cylinder.

An ancillary object of my invention is to obtain a mechanism which will speed up the operation of shaving of the record cylinders.

Other and further objects will appear to one skilled in this particular art, after reading the specication, in which:

Figure l is a top-plan View, on a reduced scale, of an entire cylinder shaving machine, except that only onek end of the operating motor is shown.

Figure 2 is a side elevation of the machine shown in Figure 1,

Figure 3 is a right-hand end elevation of the machine shown in Figures l and 2.

Figure 4 is a View, substantially Afull-size, of the knife-bar housing in approximately the same position which it occupies in Figure 3, and looking at the same side shown in Figure 3, certain parts Nithin the housing being shown in dotted lines, and the knife itself and chip-guard being removed. v

Figure 5 is a View of Figure 4 looking at the right-hand end.

Figure 6 is a section on the line 6-6 of Figure 5.

Figure 7 is a View of the bottom side of the knife-bar housing.

Figure 8 is a side elevation of avmovable knifebar support.

Figure 9l is a view of the left-hand end of Figure 8. l

` ing screw 13.

1932. serial No. 591,113

Figure 10 is a view of the right-hand end of Figure 8.

Figure l1 is a fragmentary central view on the line H-H of Figure 1, showing the automatic stop mechanism utilized in setting the knife-bar. n

Figure 12 is a fragmentary plan view looking down on the top of Figure 11, certain of the parts being shown in dotted lines.

Figure 13 is a View showing the cylinder and position of the knife bar and cutting tool just at the instant the cutting tool engages the cylinder and before the shaver arm is moved to the position shown in Figure 3. The View also shows the final position of the cutting tool as indicated in Figure 3. p

Figure 14 is an enlarged fragmentary view taken approximatelyon the line 14-14 of Figure l1.

In the description which follows, the holder or conventional parts of the shaving mechanism will be referred to briefly, and only for the purpose of making my improvements clearly understood.

1n the various views of the drawings, wherein like numbers refer to corresponding parts, 1 is a frame preferably of metal, to which is attached a driving motor 2. rIhe rotor shaft is connected 'through a universal joint 3 to a shaft 4 carried by a suitable support 5. The shaft 4 also carries a cylindrical mandrel 6 for supporting the record tablet '7.

The frame 1 also carries two bosses or pedestals 8 and 9, between which is supported a rod 10 carrying the shaver arm l1 which is fastened to a sleeve 12 by any satisfactory means as by clamp- The sleeve 12 also carries a flexible 90 arm 14 on the extremity of which is mounted a plate 15v having screw-threads cut therein for engagement with the feed screw 16 supported between the bosses or pedestals 17 and 18. The feed screw 16 is operated by a pulley 19 driven by 95 a belt 20 from -pulley 21 on the shaft of the motor 2.

Below the mandrel 6, a rectangular opening 80 is provided in the frame 1 for the passage of chips l resulting from the shaving operation. Adjacent ioo the rear of the opening 80, a rib 81 is provided across the frame 1 for the purpose of strengthening and stiifening the frame at this point. The arm 11 rcarries a downwardly extending finger 54 adapted to engage the rib 81 to limit the move- 105 ment of the arm 11 in one direction as may be seen in Figure 3.

The shaver arm 11 is provided with a stop lug 22 which engages a straight edge 23 carried on the frame of the machine.

From the above brief description, it will be seen that when the shaver arm 11 is moved to the right on the support rod 10, and dropped down so that the stop lug 22 engages the straight edge 23, the screw 15 will engage the thread of the feed screw 16, and when this is rotated by the motor 2, the shaver arm 11 will be carried toward the left, and the knife carried in the holder 24 will take a cut or shaving from the outer surface of the cylindrical record 7.

My improvements to the general mechanism of the machine will now be described.

Mounted on the bracket 25 attached to the shaver arm 11, is a rectangular-shaped housing 26 having a bent cover plate 27 adapted to close one side and one end thereof, the short arm 28 of the cover closing the end of the casing. Within the casing 26, are positioned two V slideways 29 and 30. These V slide-ways are preferably bent up from sheet metal, or they may be out from angle-shaped strips, The member 29 has a saddle 31 attached at one end and a similarlyshaped saddle 32 at the other end. The saddle 31 in provided with anotch 33 which is formed at an angle so as to provide a cam surface 34 to be engaged by a screw 35 carried by the casing for the purpose to be hereinafter explained. The saddle 32 is provided with a pair of recesses 36, in each of which is positioned a pair of springs 37, the purpose of which will be directly explained.

The slide-way member 30 has similar saddles 31', 32 which are not provided with the cam surface or the recesses but are provided with screw-threaded holes to receive the screws 38 and 39 for holding the cover 27 in place. The slide-way member 30 is fixed in position within the easing 26, while the slide-way member 29 is movable therein.

Between the movably-mounted slide-way member 29 andthe fixed slide-way member 30, there is,` a sliding bar, hereinafter referred to as a knife-bar 40. The bar 40 is substantially square in cross-section and is provided throughout its ylength with a cylindrical bore 41 adapted to slidably support a plunger 43. Positioned within the upper part of the bore 41, is a spring 42 adapted to rest on the end of the plunger 43. To the outer end of plunger 43 is attached a knifeholder 24 carrying a knife 45 preferably of sapphire. The knife-bar 40 and phunger 43 are held together by set screw 44. The knife-bar 40 carries a pin 46, the end of which operates in a slot 47 in the cover plate 27. The pin 46 and slot 47 act to determine the extreme positions to which the knife may be moved, in one of which they act to prevent the shaving of a cylinder below a predetermined minimum diameter.

On the side of the casing, opposite the cover 27, there is attached a bracket 48 having ears which support a pivot pin 49. On the end of the pivot pin 49, there is mounted, by means of a screw 50, a lever arm 51 which is adapted to engage a stop member 52 (see Figs. 1 and 2) for the purpose to be directly explained.

The pivot pin 49 carries a secondary pin 53 which projects through a slot in the side of the casing 26 to a point just below the saddle 32 on the slide-way 29, whereby, when the lever 51 is operated, the' slide-way 29 is moved longitudinally.

The nger 54 of arm 11 is adapted to engage, under one condition of operation, an interference piece or stop member normally biased to a position within a slot 82 in the rib 81 and comprising a latch 55 fastened by a pivot pin 56 to a horizontal lug on a lever 57, which extends downwardly through the opening in the frame and is in turn pivoted on the under side of the frame of the machine by a pivot screw or pin 58. The lever 57 is biased by a spring 59 against the frame, while the latch 55 is held against a stop pin 61 carried on the lever 57, by a spring 62. Thus the interference piece or stop member is capable of a compound motion for the purpose which will be made clear in the description of the operation of the machine.

The machine is equipped with a compound lever arrangement comprising a hand-operated arm 63 acting through a link 64 and connecting rod 65, link 66, to the lever 67. The lever 67 has pivotally mounted thereon, a shoe 68 having a limited movement whereby it will self-align itself in engagement with the end 69 of the record cylinder when the lever 63 is pulled toward the operator, looking at Figure 2. When the lever 63 is toward the operator, the shoe 68' engages the end 69 of the record cylinder and pushes it off the cylinder support member 6, but the record cylinder is prevented from being thrown oil' the support, because the lever 63 is brought into its path before this can happen. The lever 63 is provided with a leaf spring 63 to prevent breakage of the cylinder. I have thus provided a simple and eifective way of removing the record cylinder from its support without injury thereto.

llt may be remarked in passing that the levers 79 and 71 carried on the slide-bar 72, are engaged by the member 14 at the limit of its travels,

for operating a switch mechanism 73 for con- 1f trolling the operation of the motor 2.

Coming now to the operation of the shaving mechanism, let it be assumed that the shaver arm 11 is traveling to the left (see Fig. 1) and taking a cut on the record cylinder 7. As the 1 lever 5l, mounted on the knife-bar housing 26, engages the stop 52, the pin 53 is operated to engage the saddle 32 on the slide-Way 29, as has been explained. This raises the slide-way 29, which has been held in close engagement with 1 the knife-bar 40, by reason of the cam surface 34, and the cooperating screw 35, together with Y the downward action of the springs 37. As soon as the slide-way 29 has been raised as above explained, its grip on the knife-bar 40 is broken 1 and the knife-bar 40, which has passed by the left-hand end of the cylinder 7, drops down until the pin 46 engages the lower end of the slot 47. At the same time, the motor is stopped by reason of the switch mechanism previously explained. l

The knife is now ready to be reset to take another cut on the same cylinder if desired, or to shave another cylinder. This resetting is done by the operator taking hold of the knob 74 and raising the same until the nger 54 strikes the 1 rib 81 of the frame'l, or the knife clears the cylinder, and then moving the shaving arm 11, with its sleeve l2, to the right (see Fig. 1) on the rod 10. Presently the finger 54 on the shaving arm il strikes the latch 55 which is rotated 1 against the tension of spring 62 until it strikes the edges of slot 82 in rib 81 where it is held against further motion thereby preventing, for the moment, further movement to the right.

The operator then starts lowering the shaver arm 11, which act will bring the cutting tool 45 into contact with the surface of the cylinder 7 about as lindicated in Figure 13. Further lowering of the shaver arm 11 to the position shown in Figure 3, will cause the knife-bar 4o to be 1 pushed inwardly within the casing against the tensionY of the spring 42,and as the shaver arm l1 is lowered, the cutting tool will slide on its end surface on the cylinder as the knife-bar 4f) is pushed inwardly until, when the stop lug 22 on the arm l1 engages thestraight edge 23, the cutting tool will be in about the position indicated by 76 in Figure I3, which is the normal cutting position of the tool. While the knife-f bar is being moved into resetting position as just described, the slide-way 29 is being urged downwardly by the springs 37 to its lower-most position, since the lever 5l hasV been moved away from engagement with the stop 52. As theslidev way 29 moves downwardly, the pin`35 carried to clear the latch as indicated in Figure 11, so

that the spring 62 will cause the latch to return to its normal position against the stop pin 61. In this position it presents the right hand edge of its inner end portion to the finger 54 of the arm 11 which may now be raised to disengage the feed nut. This movementl causes the finger 54 to engage the latch 55 at the right-hand edge of its inner edge portion and since the latch is held against movement by reason of its engagement with pin 61, further movement of the arm will force the lever 57 and latch 55 out of the way so that lthe arm 11 may be freely moved to the right to the starting position. It is to be noted that the latch 55 is so mounted as to offer 'little or no resistance to the movement of the finger 54 which readily pushes it out of the way when the shaver arm 1l is moving to the left to take the shaving out on the cylinder.

From the preceding description, it will be seen that all the operator is required to do is to raise the shaver arm 11 after the shaving cut has been made, move it to the right until it engages the stop, drop the shaver arm 11 to the position shown in Figure 3, immediately raise it, and move the arm to the extreme right and drop it into said bar to releasably lock the same againstv longitudinal movement in one direction, said device being ineifective to lock said bar against longitudinal movement in the other direction.

2. In a record shaving machine, a knife bar, a support on which said bar is mounted for longitudinal movement, and means comprising a member carried by said support and automatically movable into locking relation with said bar upon the application to the bar of force in one direction lengthwise thereof.

3. In a record shaving machine, a knife bar, a

support on which said bar is mounted for longitudinal movement, means comprising a member carried by said support and movable thereon into frictional engagement with said bar, and means rendered operable upon the application to the bar of force in one direction lengthwise .thereof to effect such engagement.

4. In a 'record shaving machine, a knife bar longitudinallyl movable to and from operative position with respe'ctto arecord mounted in the machine, and a member for locking said knife bar. against longitudinal movement, said member being movable'to and from operative locking position and being biasedV to such position, the locking member when in operative position being effective to hold said bar against longitudinal movement in but one direction, said knife bar upon the applicaltion of force thereto in the other direction of its longitudinal movement effecting movement of said member to inoperative position.

5. In a record shaving machine, a rotatable record support, a carriage, said carriage and support being relatively movable transversely of said support, a knife bar mounted on said carriage for movement toward and away from said support, said knife bar being biased to one limit of such movement, means for locking said bar in .operative position with respect to a record mounted iny said machine, and means for releasing said locking means, said releasing means being automatically actuable uponcornpletion of and in response to the relative transverse movement of said carriage and support in one direction.

6. In a record shaving machine, a rotatable record support, a carriage, said carriage and support being relatively movabler transversely of saidsupport, a knife bar mounted onsaid carriage for movement toward and away from said support, said knife bar being biased to the inner limit of such movement, means for locking said bar in operative position with respect to a record mountedin said machine, and means for automatically releasing said locking means upon completion of and in response to the relative transverse movement of said carriage and support in one direction.

7. In a record shaving machine, a rotatable record support, a carriage, said carriage and support being relatively movable transversely of said support, said carriage also being movable toward and away from the axis of said support, a knife bar mounted on said carriage for movement towardand away from a record on said support, said bar being biased to the inner limit of its said movement and being movable toward the other limit of such movement to operative position by engagement of its knife with said record upon movement of said carriage toward the axis of said support, and means for locking said bar in operative position.

8. In a record shaving machine, a rotatable record support, a carriage, said carriage and support being relatively movable transversely of said support, said carriage also being movable toward and away from the axis of said support, and a knife bar mounted on said carriage for movement toward and away from a recordv on said support, said bar being biased to the inner limit of its said movement and being movable toward the other limit of such movement by camming engagement of its knife with said yrecord upon movement of said carriage toward the axis of said support.

9. In a record shaving machine, a rotatable record support, a carriage, said carriage and support being relatively movable transversely of said support, said carriage also being movable toward and'away from the axis of said support, a knife bar mounted on said carriage for movement toward and away from a record on said support, said bar being biased to the inner limit of its said `movement and being movable toward the other limit of such movement to operative position with respect to said record by engagement of its knife with the record upon movement of said carriage toward the axis of said support, and releasable locking means normally effective to lock said bar against movement toward the record support but which is ineffective to lock the same against movement away from said support.

10. In a record shaving machine, a rotatable record support, a carriage, said carriage and support being relatively movable transversely of said support, a knife bar mounted on said carriage for movement toward and away from operative position with respect to a record on said support, said carriage also being movable to effect setting of the knife-bar in its said operative position, and means for preventing movement of said carriage to starting position before the knife-bar setting movement thereof.

11. In a record shaving machine, a rotatable record support, a carriage, said carriage and support being relatively movable transversely of said support, a knife bar mounted on said carriage for movement toward and away from operative position with respect to a record on said support, said carriage also being manipulative to effect setting of the knife-bar in its said operative position, and means cooperative with said carriage and necessitating such manipulation of the carriage before the same is moved to its starting position.

l2. In a record shaving machine, a rotatable record support, a carriage, said carriage and supportbeing relatively movable transversely of said support, a knife bar mounted on said carriage for movement toward and away from operative position with respect to a record on said support, said carriagerbeing movable toward and away from said support and when positioned away from said support being freely movable toward the starting position, movement of said carriage toward said support being effective to move said knife bar to operative position with respect to said record, and a member located in the path of movement of said carriage transversely of the support, said carriage when in knife bar setting position being adapted to clear said member.

13. In apparatus of the class described, a rotatable support for cylindrical records, land means for ejecting a record from said support comprising a member which is movable into and out of the path Aof movement of the record from said support, said member being moved into said path upon the operation of said means to eject said record.

14. In apparatus of the class described, arotatable support for cylindrical records, and means for ejecting a record from said support comprising a resilient bumper member which is movable as a result of the actuation of such means into and out of the path of movement of the record from said support, said member being moved into said path only upon the operation of said means to eject said record.

WILLIS S. FRIDELL.

CERTIFCATE @F CRRECTON.

Patent No. 1,927,167. sepemeef es, 1933.

WILLES S. ERDELL It is hereby eei'ied hat error annesso in toe printed speoiieetiens of the above numbered Datemi iequiring ooireeon as oiows: Page 2, Eine 24, for "in" read is; and line 5L for phonger" eed plunger; page 3, line H, eieim 8, strike out "smi" seeond ooeorrenoe; Eine i4-3? ater "movement" inserti the words to operative position; and line M6, ehe-i "sappen" insert the semina and words and means im' locking said bei' in opeetive position; and imt he said Letters Patent should be read with hese eorrections therein that the seme may conform to the record of the case in the Pafren ice.

Signed and seaied this 21st day of Novenlbef, An D. 1933.

F. M. Hopkins (Seal) Acting Commissioner of Patents.

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