US3801109A - Record changer - Google Patents

Record changer Download PDF

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Publication number
US3801109A
US3801109A US00147499A US3801109DA US3801109A US 3801109 A US3801109 A US 3801109A US 00147499 A US00147499 A US 00147499A US 3801109D A US3801109D A US 3801109DA US 3801109 A US3801109 A US 3801109A
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United States
Prior art keywords
lever
record
set down
pin
cycle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US00147499A
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English (en)
Inventor
G Kolomayets
M Reed
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Thomas International Corp
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Thomas International Corp
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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B3/00—Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor
    • G11B3/02—Arrangements of heads
    • G11B3/08—Raising, lowering, traversing otherwise than for transducing, arresting, or holding-up heads against record carriers
    • G11B3/085—Raising, lowering, traversing otherwise than for transducing, arresting, or holding-up heads against record carriers using automatic means
    • G11B3/08535—Driving the head
    • G11B3/08538—Driving the head the head being driven by the same means as the record can
    • G11B3/08541—Driving the head the head being driven by the same means as the record can for pivoting pick-up arms
    • G11B3/08545—Driving the head the head being driven by the same means as the record can for pivoting pick-up arms driven by cams
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B17/00—Guiding record carriers not specifically of filamentary or web form, or of supports therefor
    • G11B17/08—Guiding record carriers not specifically of filamentary or web form, or of supports therefor from consecutive-access magazine of disc records
    • G11B17/12—Guiding record carriers not specifically of filamentary or web form, or of supports therefor from consecutive-access magazine of disc records with axial transfer to the turntable from a stack with a vertical axis
    • G11B17/16—Guiding record carriers not specifically of filamentary or web form, or of supports therefor from consecutive-access magazine of disc records with axial transfer to the turntable from a stack with a vertical axis by mechanism in stationary centre post, e.g. with stepped post, using fingers on post
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/14—Electrothermal mechanisms
    • H01H71/16—Electrothermal mechanisms with bimetal element
    • H01H71/162—Electrothermal mechanisms with bimetal element with compensation for ambient temperature

Definitions

  • This invention pertains to a record changer for playing records of different sizes and for performing an automatic record change cycle.
  • None of the foregoing patents show a record changer having minimal number of parts for performing the normal record changer functions, with a common locating point for a plurality of operating levers to reduce and minimize vertical and horizontal tolerance prob lems; the improved actuation of a record spindle mechanism with the spindle oriented to take advantage of this improved operation; the control of the outward limit position of the tone arm from the cycle gear through utilization of the velocity trip link; the improved construction, mounting and set down adjustment for the tone arm and the relation of the set down lever in association with the cycle gear for operation of the lever; and the structure and mode of operation for the reject lever and last record shut off lever.
  • the record changer disclosed herein represents a substantial reduction in cost, both in the cost of parts and assembly operations, by having integrally-molded bushings, studs and other mountings which are molded onto the mounting base of the record changer in a plastic molding operation, with design of other parts, such as the cycle gear, for direct mounting into and retention by the mounting therefor.
  • Structures using plastic molded mounting parts in unrelated fields are shown in Pat. Nos. 3,248,867, 3,397,531, 3,457,719, and 3,496,718.
  • the primary object of the invention is to provide an inexpensive, reliable record changer constructed to utilize inexpensively-molded plastic parts as permitted by a design which minimizes vertical and horizontal tolerances between the parts by mounting a plurality of operating levers at a common reference location and with the levers in stacked engaging relation.
  • Another object of the invention is to provide a record changer, as defined in. the preceding paragraph, wherein the operating parts formed of plastic can be mounted directly onto bearings, studs and other mountings formed of plastic molded directly onto a mounting base of sheet metal wherein separate bearings are not required and a plastic operating part is movably mounted directly to a plastic mounting part.
  • Other objects of the invention relate to the record changer and particularly the tone arm, both in the control of the positioning thereof through limiting outward movement by a velocity trip link which engages between the tone arm and the cycle gear, a mounting of the tone arm including a flexible plastic mounting hub providing for simple adjustment to control the set down position of the tone ann, and structure for assembly of the tone arm and, particularly, the tubular arm thereof carrying the stylus which provides a firm mounting of the tubular arm to reduce rumble.
  • Another object of the invention is to provide a series of operating levers with a set down lever performing a plurality of functions and operated from a cam on the cycle gear and with the cycle gear cam also operating a last record shut off lever, whereby a single cam on the cycle gear as well as a drive connection therefrom to a rocker arm of the record changer provides all of the power required for the record change cycle operation.
  • FIG. 1 is a plan view of the record changer in playing position, with the tone arm in position to commence playing of a large diameter record;
  • FIG. 2 is a plan view of the mounting base and mechanism associated therewith and with the parts shown in playing position and with the record overarm and tone arm omitted;
  • FIG. 3 is a bottom plan view of the structure shown in FIG. 2;
  • FIG. 4 is a vertical section, taken generally along the line 4-4 in FIG. 2, and with part of the turntable, motor-board, and record overarm shown;
  • FIG. 4A is a fragmentary section, taken along the line 4A-4A in FIG. 4;
  • FIG. 5 is a vertical section, taken generally along the line 55 in FIG. 2;
  • FIG. 6 is a fragmentary section, taken generally along the line 66 in FIG. 2;
  • FIG. 7 is a fragmentary section, taken generally along the line 7-7 in FIG. 2;
  • FIG. 8 is a view similar to FIG. 2; with parts omitted and showing the positioning of parts in a record change cycle at the time of ejecting a record for movement to the turntable;
  • FIG. 9 is a fragmentary view of structure shown at the right-hand end of FIG. 8 showing the tone arm in a position for playing a large record;
  • FIG. 10 is a view similar to FIG. 2 with parts omitted and showing the certain parts positioned in a last record shut ofi operation;
  • FIG. 11 is an enlarged, exploded perspective view of a number of components of the record changer
  • FIG. 12 is an enlarged, exploded view of certain parts of the record changer shown in FIG. 11 as well as additional parts;
  • FIG. 12A is a plan view of a tone arm mounting hub and associated structure shown in FIG. 12.
  • the record changer is shown generally in FIGS. 1 and 4 and includes a motorboard, indicated generally at 10, which carries a turntable drive unit, indicated generally at 1 l, for engaging a downturned flange 12 of a turntable 15.
  • the speed of rotation'of the turntable can be varied by adjustment of a slider 16 which, through linkage (not shown) adjusts the drive mechanism 11 in a generally known manner for the desired speed required for playing of a record.
  • a large record 18, such as a conventional size 12-inch record, is shown in position in FIG. 1 for playing by a tone arm, indicated generally at 20.
  • the record 18 is positioned for playing by a spindle, indicated generally at 21, positioned at the center of rotation of the turntable l and having provision for supporting a stack of records.
  • An overarm is conventional in record changers having a spindle 21 of the type shown and has an out-of-the-way position to one side of the record changer or an operative position as shown in FIG. 1 to coact with the record spindle 21 in holding a stack of records above the turntable.
  • This overarm 22 is also used to sense the absence of records in the stack to signal the requirement for a last record shut off operation.
  • FIG. 1 Additional controls for the record changer are shown in FIG. 1, including a slide 23 having three positions, as shown by the indicia appearing in FIG. 1.
  • the slide 23, as positioned, provides for normal operation of the record changer while it has two additional positions for either turning off the record changer or causing a reject operation. These functions are carried out in a manner to be described.
  • a third slide 24 operates to control the set down position of the tone arm dependent upon the size of record to be played.
  • This signal is set in manually, rather than having size sense mechanism providing for operation which enables automatic intermix of different size records on the spindle 21.
  • This control of the set down position occurs in a manner to be described.
  • the record changer mechanism is mounted on a mounting base, indicated generally at 25, in the form of a sheet metal plate which rotatably mounts the turntable 15 and which is fastened to the motorboard by threaded members extending through the motorboard l0 and threaded into attachment members 26, 27, 28 and 29 formed of plastic and molded to the mounting base 25.
  • a tubular plastic mounting post 30 extends upwardly from the mounting base 25 and receives the spindle 21 with a hub 31 loosely fitted on the post and retained in position by a snap ring 32, fitted in a groove on the post.
  • This hub has gear teeth 33 on its lower end for coacting with a cycle gear 34 and has a flange at its upper end with a threaded shank therebeneath. The turntable tits under the flange and is held on the hub by a nut 35 threaded onto the threads on the hub.
  • the plastic mounting post 30 is integral with a plastic mounting part 38 having a cylindrical opening 39 for receiving a cylindrical section 40 of the cycle gear 34.
  • the mounting base 25 can be used with mold elements to have plastic parts molded directly thereto, such as the mounting part 38 and post 30, with a connecting flange 41.
  • a series of openings 42 are provided in the mounting base 25 surrounding the cutout in the base which receives the mounting part 38, whereby integral plastic sections 43 are formed in said openings to assure that the mounting part 38 remains in a concentric cylindrical shape upon cooling of the plastic.
  • the cylindrical shank 40 of the cycle gear is provided with a series of flexible finger sections 45, each having a hook-shaped 'lower end whereby the cycle gear can be inserted into the mounting part 38 by inward movement of the fingers 45 and when in final position the hook-shaped ends of the fingers engage the underside of the mounting part 38 to hold the cycle gear in position with said engagement being sufficiently loose to permit free rotation of the plastic cycle gear 34 within the plastic mounting part 38.
  • the overarm 22 for the record changer is fastened to a vertically-extending rod 50 (FIGS. 4 and 6) and is movable within a plastic mounting element 51 molded to the mounting base 25.
  • the lower end of the rod 50 I coacts with a pivotally-mounted plate 52 having a pair of upstanding legs 53 andv 54 extending upwardly and loosely through a pair of openings 55 in the mounting base 25 to permit'pivoting of the plate 52 from the full line position shown in FIG. 6 to the broken line position.
  • the plate 52 is yieldably held in the full line position by a pair of springs 56 fitted around the legs 53 and 54.
  • the overarm 22 and rod 50 descend and are of sufficient weight to pivot the plate 52 to the broken line position and to lower a hook 58 on the plate out of a lever-retaining position to the broken line position shown in FIG. 6.
  • the lower, broken line position of the plate 52 provides a signal that a last record shut off operation should be performed. The downward pivoting of the plate 52 cannot occur until a certain point in the cycle, as described subsequently.
  • the record spindle 21, shown particularly in FIGS. 4 and 5, has a cylindrical body 60 which is slotted along its length to receive an ejector lever 61 pivotally mounted on a pivot pin 62 by an elongate slot 63 formed in the lever to permit vertical movement of the lever as well as pivoting thereof.
  • the pivot pin 62 rests in a groove on top of mounting post 30 to properly locate the record spindle 21. Records are supported on a shelf 64 provided on the spindle body 60.
  • the shelf 64 of the spindle and the plane of movement of the ejector lever 61 extend in a direction which is normal to a line between the spindle and the tone arm mounting which is an orientation rotatably offset from the normal orientation.
  • This orientation permits a direct sweep-action of a rocker arm 71 and a plastic element 77 carried thereon (both described subsequently) in acting along a line parallel to the plane of pivoting movement of the ejector lever 61.
  • the ejector lever 61 in a cycle of operation moves upwardly from the position shown in FIG. 5 and then pivots in a clockwise direction with the upward movement placing the upper end of the ejector lever within a record hole and the clockwise movement then moving the lowermost record off the shelf 64.
  • the spindle body 60 is releasably mounted within the mounting post 30 and is held in position by a leg 65 of a spring shown in FIG. 4A engaging a groove in the lower end of the spindle body.
  • This spring has a series of convolutions 66 wound about a lower end of the attaching member 26 (FIG. 4) with the leg 65 extending therefrom and captured by a plastic element 67- molded to the mounting base 25 whereby the leg 65 remains in the position shown even when the spindle body 60 is withdrawn from the mounting post 30.
  • the other leg 68 of the spring coacts with the ejector lever 61 to urge it to the retracted position shown in FIG. 5.
  • This spring leg 68 is captured by a plastic part 69 on the mounting base whereby the leg remains in the position shown, even when the spindle body 60 is withdrawn.
  • a central reference or location point is provided for a plurality of operating components of the record changer and specifically by a plastic mounting post 70 (FIGS. 4 and 11) molded in a cut-out in the mounting base 25 and extending both above and below said mounting base.
  • a rocker arm 71 is mounted for oscillation on the lower part of said mounting post beneath the mounting base for operating the tone arm and the spindle ejector lever 61 in a change cycle operation and is driven from the cycle gear 34.
  • the rocker arm 71 fits loosely on the mounting post 70 and is retained in position by a pair of intumed depending plastic legs 72 and 73 formed integrally with the underside of the attachment member 29 (FIG. 3) which engage and guide one end of the rocker arm 71 while the opposite end is movably guided by the head of a threaded element 74 threaded into the lower side of the attachment member 26 (FIG. 4).
  • the rocker arm 71 has an opening 76 to movably receive a plastic member 77 provided with a groove 78 to receive the lower end of the ejector lever 61 and both elevate and pivot the ejector lever 61 in a record change cycle.
  • the plastic element 77 has an internal opening 78 to receive an upturned end 79 of a spring 80.
  • the spring 80 is captured on the rocker arm 71 and, by engagement with the plastic element 77 and with the loose mounting of the latter in the slot 76 of the rocker arm, the plastic element is free to both slide and also rock, against the yieldable force of the spring 80.
  • the rocker arm 71 is provided with a recessed groove 82 to receive the lower end of the ejector lever when the rocker arm is near one limit of its oscillatory path of movement.
  • the rocker arm 71 is oscillated back and forth in a record change cycle by the cycle gear through means of a drive pin 84 extending down from the cycle gear 34 which engages in a slot 85 in the rocker arm.
  • the tone arm is mounted in the manner shown particularly in FIGS. 4, 12 and 12A, with a plastic tubular mounting post 90 extending upwardly from the mounting base and formed integrally with the attachment member 29.
  • the mounting post 90 rotatably mounts a clutch member 91 which fits under a set down cam element 92 having a tubular section 93 extending up around the mounting post 90.
  • a plastic mounting hub 94 fastens to the tubular section 93.
  • a lift pin 95 extends upwardly through the mounting post 90 and is urged downwardly by a spring 96 captured between a flange 97 on the lower end of the lift pin and an insertable plastic member 98 that fits into the base of the mounting post 90.
  • the tone arm mounting hub 94 has a pair of outwardly extending pivot pins 100 and 101 which rotatably mount a tone arm base 102 with a tubular arm 103 of the tone arm 20 extending therefrom and carrying a stylus 104 at an end thereof.
  • the lift pin 95 is operated during a record change cycle by the rocker arm 71 to be elevated and engage the underside of the tone arm base 102 to pivot the tone arm upwardly about the pivot pins 100 and 101 whereby the tone arm can be swung to an outer position beyond the path of the record being lowered to the turntable, with subsequent return of the tone arm to a position where it is lowered to set down position on a record by lowering of the lift pin 95.
  • FIGS. 4, 1 1 and 12 there is a depressed section of the rocker arm having sloped walls 1 10 whereby when the rocker arm is at an inactive position the lift pin is in its lowered position at the base of the sloped walls and as shown in FIG. 4.
  • the rocker arm 71 moves and cams the lift pin up along a sloped wall to the level of the rocker arm which results in lifting the lift pin 95 and at the end of the cycle the lift pin returns to its lower position.
  • the tone arm is lifted, it is moved outwardly by means of an actuating pin 111 on the rocker arm 71 which engages in a notch 112 in the clutch member 91.
  • the clutch member is lifted into firm engagement with the set down cam element 92 by the member 98 and the pins 114 and 115 thereon passing through openings in the base of the mounting post 90 engaging the clutch member 91.
  • the actuating pin 111 On reverse movement of the rocker arm 71, the actuating pin 111 functions to return the tone arm to a set down position, as determined by mechanism to be described and as permitted by the clutch drive through the clutch member 91.
  • the limit of outward movement of the tone arm is controlled by a velocity trip link 120 having a pair of closed-end slots 121 and 122 at'opposite ends thereof.
  • the slot 121 fits onto an upwardlyextending projection 123 on the cycle gear 34 (FIG. 4) at the center of rotation thereof while the slot 122 fits onto a pin 125 extending upwardly from the set down cam element 92.
  • the velocity trip link 120 is retained in association with the mechanism by a headed end of a forcing pin 176 referred to subsequently which overlies the trip link and floats relative to the set down cam element 92 by a constant force member in the form of a weight 127 which loosely fits on the pin 125.
  • a spring could be used in place of the weight.
  • the velocity trip operation will subsequently be described.
  • the dimension of the link and the slots is such that when the outer ends of the slots 121 and 122 are in engagement with the projection 123 and the pin 125, the outward movement of the tone arm is positively limited and continued actuation of the rocker arm and the clutch member 91 does not result in any further movement of the tone arm outwardly.
  • the clutch member 91 can move downwardly to release the pins 116 and 117.
  • the tone arm mounting hub 94 is positioned on the tubular section 93 of the set down cam element by integral fingers and is keyed thereto for rotation with the set down cam element. A series of flexible fingers 130.
  • the tone arm mounting hub 94 is formed of plastic with a hinge section whereby the orientation of the mounting pins 100 and 101 can be varied with respect to the'tubular part 136 of the hub which fits onto the cam extension 93 to provide a simple adjustment for the set down position of the tone arm.
  • the tone arm mounting hub has an integral apertured leg 137 in alignment with an apertured section 138 of the hub and a threaded bolt 139 passes through said apertures and threads into a nut 140 captured in a recess 141 in the hub section 138.
  • a spring 142 surrounds the bolt and is captured between the hub leg 137 and hub section 138. Rotation of the threaded bolt 139 results in flexing of the hub about the hinge section 135 to provide an accurate set down adjustment for the tone arm.
  • a record change cycle operation is initiated by a velocity trip mechanism including the trip link 120 previously referred to.
  • This general type of structure is known wherein the cycle gear 34 has a nontoothed portion, as indicated at 150 (FIG. 2) which is opposite the gear teeth 33 on the hub 31 during play of a record or when the record changer is not in use.
  • a trip pawl 151 pivoted to the cycle gear at 152 is moved to a position wherein a rib formed on the hub 31 engages the pawl and imparts initial rotation to the cycle gear 34 sufficient to bring the teeth thereon in engagement with the hub teeth 33.
  • a revolution of the cycle gear then occurs and continues until the nontoothed portion 150 again comes opposite the hub teeth 33.
  • the trip pawl is operated by the velocity trip link 120 with the latter link following the inward movement of the tone arm during play of the record.
  • the velocity trip link 120 moves inwardly as the tone arm is tracking record grooves.
  • the trip link will engage and move the trip pawl 151.
  • the movement of the trip pawl will be insufficient to cause cycle initiation and the trip pawl will be moved backward by a hub tooth 33 along with the trip link 120 which is permitted by the loose mounting of the trip link 120 to the pin 125 on the set down cam under the urging of weight 127.
  • the rate of inward movement of the tone arm, trip link 120 and trip pawl 151 is sufficiently fast to get the trip pawl in position to be engaged by a hub tooth 33 and initiate the cycle.
  • the velocity trip link 120 is reset to its initial position by outward movement of the tone arm and the engagement of the ends of the slots 121 and 122 thereof as previously described which also limits the outward movement of the tone arm.
  • the trip pawl 151 is reset by a cam shape 155 thereon engaging the hub 31.
  • the reset position of the trip pawl 151 is limited by a stop 156 on the cycle gear 34.
  • a set down lever 150 In addition to the rocker arm 71, there are three primary operating levers of plastic causing various required operations of the record changer. These are a set down lever 150, a last record shut off lever 160, and a reject lever 170. In order to minimize horizontal and vertical tolerance problems, the number of horizontal pivots for these levers is held to a minimum and all three levers are referenced to a single reference or location point and interengage at the common reference point.
  • the common point is the mounting post 70 which extends upwardly through an elongate slot 171 in the set down lever 150, a pivot opening 1.72 in the last record shut off lever and an elongate slot 173 in the reject lever 170. As shown in FIG.
  • the set down lever 150 performs a number of functions. This lever forms part of the mechanism for setting the set down position of the tone arm and detents the cycle gear in an inactive position.
  • the set down lever is held out of interference with the set down cam element 92 during outward movement of the tone arm by a cam on the underside of the cycle gear 34.
  • the set down lever 150 is pivoted to the mounting base 25 by a downwardly extending projection thereon fitting in a pivot opening 181 in a plastic member 182 formed on the mounting base 25 and is spring-urged in one pivotal direction by a spring 183 connected between the mounting base 25 and a pin 184 on the set down lever.
  • a notch 185, at an end of the set down lever coacts with an enlargement 186 at the leading edge of a cam 187 formed on the underside of the cycle gear 34 to hold the cycle gear detented in the inactive position shown in FIG. 2.
  • the size-setting cam 191 has three surfaces 193, 194 and 195 at different radial distances which control the set-down position for 7 inch, 10 inch and 12 inch records, respectively.
  • the size-setting cam 191 is rotatably positioned by operation of the slide 24 to position one of the surfaces for engagement by an end 196 of the set down lever 150 which correspondingly positions an upwardly extending lug 197 on the set down lever for engagement with one of a plurality of steps 200, 201, and 202 on the set down cam element 92.
  • the steps 200, 201, and 202 are in series and provide for differing lengths of return movement of the tone arm 20.
  • Step 201 provides for set down on a 10 inch record and step 200 for a 7 inch record.
  • the size-setting cam 191 is positioned to position the set down lever 150 for a set down position for a 12 inch record, with the lug 197 on the set down lever in engagement with the step 202 on the set down cam element 92.
  • the set down lever is moved out of engagement with the set down cam element 92 by reengagement of the leading end cam 186 with the notch 185 in the set down lever to permit free tracking of a record by the tone arm.
  • the pin 184 on the underside of theset down lever 150 extends through a slot 210 in the mounting base as shown in FIG. 11.
  • the parts are shown in FIG. 8 in a position occurring during a change cycle and at the time of ejecting a record from the spindle shelf 64 to the turntable with the set down lever 150 positioned against the surface 195 of the size-setting cam 191 whereby as the tone arm returns inwardly the set down cam element 92 is held (FIG. 9) in a position to cause the tone arm to set down for playing of a 12 inch record.
  • the reject lever 170 in addition to mounting on post 70 by elongate slot 173 has a second pivot mounting provided by an elongate slot 250 whereby the slots 173 and 250 provide two different pivot locations for the reject lever.
  • the slot 250 engages under a headed mounting pin 251 secured to the mounting base 25.
  • a depending pin 255 on the reject lever extends through an opening 256 in the mounting base 25 to coact with an electric on-off switch 258 for the record changer. This switch is shown in the on position in FIG. 2 and has a pair of legs 259 for coaction with the pin 255.
  • the reject lever 170 is controlled by the manual slide 23 of FIG. 1 with a link 260 extending therefrom and connecting with an arm 261 of the reject lever.
  • the reject lever carries a pivoted catch member 300 (FIGS. 7, 10 and 11) which extends downwardly through an opening 301 in the reject lever and is utilized in a last record shut off operation.
  • This catch member is formed of plastic with a pair of laterallyextending pivot pins 302 and 303 fitted into openings in flanges in the reject lever and has an integrally rearwardly extending spring leg 305 engaging the top of the reject lever 170 and yieldably urging the catch member to the position shown in FIG. 7 but permitting upward movement thereof by flexing of the spring leg 305.
  • This catch member coacts with structure on the last record shut off lever 160, to be described.
  • the last record shut off lever 160 is shown in normal inactive position in FIG. 2 and in active position in FIG. 10. Normally, the last record shut off lever is held inactive by the catch 58 on the pivoted plate 52 which is positioned by the rod 50, as shown in FIG. 6 and previously described. When there are no more records in a stack on the spindle 21, the plate 52 is urged to move to the broken line position shown in FIG. 6 wherein the last record shut off lever 160 is released from the catch member 58. This requires slight counterclockwise movement of the last record shut off lever 160, as viewed in FIG. 2 before the actual movement occurs. This movement is caused by the lever 266 pivoted on a tubular plastic member 320 molded to the mounting base 25.
  • the lever 266 is held in position by a headed expansion plastic member 321 fitted in member 320 and an expansion pin 322.
  • a leg 325 of the lever 266 is engaged by the leading end 186 of cam 187 as a record change cycle starts and another leg 326 of this lever engages an end 327 of the last record shut off
  • the lever 266 is urged to the position'shown in FIG. 2 by the spring 265, previously referred to, and functions to return the cycle gear 34 to a normal detent position should it slightly overtravel beyond the detent position shown in FIG. 2.
  • the movement of the last record shut off lever as caused by lever 266 only occurs at the beginning of a record change cycle.
  • the levers are then' positioned as shown in FIG. 10 and with the cycle gear 34 nearing the end of its rotation the leading end 186 of the cycle gear cam engages the lever 266 to pivot it in a clockwise direction as viewed in FIG. 10.
  • the leg 326 of the lever 266 is engaging the end 327 of the last record shut off lever and movement of lever 266 pivots the latter lever in a counterclockwise direction.
  • the interengagement between the lug 355 and catch 300 causes pivoting of the reject lever 170 about the pivot 251 to have the pin 255 on the reject lever engage a switch leg 259 and turn off the switch 258 for the record changer.
  • the tone arm has been held out by the end 340 of the last record shut off lever engaging the set down cam element 92 and preventing inward movement of the tone arm.
  • the last record shut off lever 160 is normally held in position close to that shown in FIG. 6 by the lever 266 engaging with the cam on the cycle gear 34. During the final moment of thelast record shut off operation, the
  • a pair of openings 400 and 401 in the bottom wall tubular arm 103 fit over I spaced pairs of ribs 402 and 403 on the mounting base 102 which extend into the openings.
  • the tubular arm 103 is open-ended whereby a wedge pin 404 can be inserted in between the pairs of ribs 402 and 403 to expand these ribs into tight engagement with the side walls of the tubular arm 103.
  • An end 405 of the pin closes off the end opening of the tubular arm 103.
  • the rocker arm 71 is loosely guided on the mounting post 70 and is loosely held in position by the plastic fingers 73 engageable at one end of the rocker arm and the headed fastening element 74 loosely engageable with the other end.
  • These elements are in a line including the lift pin 95 for the tone arm whereby any twisting forces that might be applied to the rocker arm by the drive pin 84 of the cycle gear are not applied to the lift pin 95. This prevents movement of the lift pin responsive to such forces and any magnification of such movements to the stylus 104 on the tone arm because of the long lever arm involved.
  • the various component mountings can be molded integrally into the sheet metal mounting base 25 and various components including mounting levers can then be mounted thereto and held in position by snap rings and expansion members of plastic to substantially reduce the time in assembly of the record changer.
  • the mounting of a plurality of operating levers at a single reference location and the engagement directly therebetween substantially reduces vertical and horizontal tolerance problems and enables these levers to be made of inexpensively plastic molded parts.
  • the entire mechanism is of a modular construction and directly mounts the turntable whereby the record changer can be mounted in any desired manner with various structures.
  • a record changer having a mounting base with spaced-apart mountings for a rotatable tone arm and a record spindle, a set down cam associated with said tone arm, a pair of mountings on said base intermediate said spaced-apart mountings with one for a rotatable cycle gear and the other being a vertically-extending pin defining a reference location for a plurality of vertically-stacked levers including a set down lever, a reject lever and a last record shut off lever, said pin extending through said vertically-stacked levers, means including interengaging parts providing for interengagement between at least two of said levers, and said levers being in engagement one with another at said reference location to establish and maintain the vertical spacing thereof.
  • a record changer as defined in claim 4 wherein said reject lever has a pair of pivot points with one defined by said pin and another by a second pin, said reject lever having means to permit pivoting thereof about either of said pins with movement about said first mentioned pin actuating said pawl and further movement about said second pin actuating switch.
  • a record changer having a tone arm with an actuating lift pin for lowering and raising the tone arm, a mounting base, a rocker arm pivotally mounted intermediate its opposite outer ends to said base, means on the rocker arm for actuating the lift pin, a cycle gear having an eccentric drive pin engageable with the rocker arm to oscillate the rocker arm through a cycle, and a pair of supports on said base for the outer ends of said rocker arm for movably guiding said rocker arm, with said supports, the lift pin and said rocker arm pivot mounting all lying along a straight line whereby any tipping movement of the rocker arm will be about an axis extending along said straight line to not cause any movement of the lift pin.
  • a record changer having a mounting base, a change cycle gear rotatably mounted on said base, a velocity trip pawl rotatably mounted on said cycle gear, a tone arm rotatably mounted on said base and having an upstanding pin, a velocity trip link extending between said pin and the velocity trip pawl, said trip link having opposite ends, a guide pin on said cycle gear at the axis of rotation thereof, and a pair of elongate closed end slots adjacent opposite ends of said link with said slots associated one with each of said pins, said slots being dimensioned to have an end of each slot engage the associated pin and define a limit position for outward movement of the tone arm and at the same time set the location of a link end to the velocity trip pawl.
  • a record changer as defined in claim 7 wherein said tone arm is moved out and in relative to a turntable during a record change cycle by power operated means including a clutch which permits overtravel of the power operated means when the tone arm is held in said limit position by the velocity trip link.
  • a record changer having a turntable, a metal mounting base, a rotatable tone arm and a record spindle spaced therefrom and at the rotational center of the turntable, a rocker arm movable through a record change cycle to operate said tone arm and spindle for change of a record, and a cycle gear mounting on said base for operating said rocker arm, plastic elements molded to said mounting base providing mountings for said tone arm, spindle, rocker arm and cycle gear, cutouts in said mounting base to receive said plastic elements, a series of small openings around at least one of said cut-outs and spaced therefrom to receive plastic which is integral with the plastic of the plastic element in position in said one cut-out, a molded plastic hollow stud extending upwardly from the mounting base intermediate the cycle gear and the tone arm mounting, a series of operating levers of plastic material including a set down lever, a reject lever and a last record shut off lever, each of said operating levers having an opening to receive said stud, said levers being verticallystacked on
  • a record changer having a mounting base rotatably mounting a change cycle gear, a tone arm and set down cam connected for movement together and rotatably mounted on said base, a record size selector member rotatably mounted on the base adjacent said set down cam, a set down lever pivotally mounted on said base and having one end adjacent the cycle gear and the other end adjacent said size selector member, said set down lever having a locating flange adjacent said other end thereof, means yieldably urging said set down lever toward the size selector member to control the position of the locating flange relative to the set down cam, and a cam on said cycle gear having an initial secinitial section coacting with said one end of the set down lever during initial rotation of the cycle gear to hold the set down lever away from the set down cam and size selector member.
  • a record changer as defined in claim 1 1 including a last record shut off lever pivotally mounted to said base, means for locking said last record shut off lever in an inactive position and responsive to absence of records in a stack to be played to free said last record shut off lever from an inactive position for movement during a record change cycle, means on said set down cam for holding said last record shut off lever in an intermediate position when the tone arm is in an inner position, means urging said last record shut off lever to a hold position to engage and hold said set down cam in an outer position when the tone arm reaches its outermost position, and a power lever operable by said cam on the cycle gear to return the last record shut off lever to said inactive position.
  • a record changer as defined in claim 12 wherein a reject lever is pivotally mounted on said base and has a spring-loaded catch member, an electrical switch operable by said reject lever, and a lug on said last record shut off lever movable to a position adjacent said catch member when the last-mentioned lever moves to said hold position whereby subsequent return of the last record shut off lever to said inactive position shifts said reject lever to operate said switch to a changed condition.
  • a record changer as defined in claim 13 wherein said set down lever, reject lever and last record shut off lever are each formed of molded plastic and are stacked in engagement one with another and with a common pivot point for said reject lever and last record shut off lever whereby engagement between said lug and catch member is assured.

Landscapes

  • Automatic Disk Changers (AREA)
  • Transmission Devices (AREA)
US00147499A 1971-05-27 1971-05-27 Record changer Expired - Lifetime US3801109A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US14749971A 1971-05-27 1971-05-27

Publications (1)

Publication Number Publication Date
US3801109A true US3801109A (en) 1974-04-02

Family

ID=22521808

Family Applications (1)

Application Number Title Priority Date Filing Date
US00147499A Expired - Lifetime US3801109A (en) 1971-05-27 1971-05-27 Record changer

Country Status (8)

Country Link
US (1) US3801109A (fr)
BE (1) BE784075A (fr)
CA (1) CA948115A (fr)
DE (1) DE2222962A1 (fr)
FR (1) FR2139116B1 (fr)
GB (1) GB1356491A (fr)
IT (1) IT958050B (fr)
NL (1) NL7206567A (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3894740A (en) * 1972-10-13 1975-07-15 Philips Corp Switching device, particularly for a record player or changer
US3963245A (en) * 1974-01-12 1976-06-15 Trio Electronics Incorporated Apparatus for automatically returning a pick-up arm in a record player
JPS51103150A (en) * 1975-03-07 1976-09-11 Matsushita Electric Ind Co Ltd Kinzokuseikibanheno goseijushiseibuhinno itsutaikeiseihoho
JPS51115928U (fr) * 1975-03-14 1976-09-20
JPS5226938U (fr) * 1975-08-18 1977-02-25
FR2397039A1 (fr) * 1977-07-05 1979-02-02 Dennis James Changeur automatique de disques
US4291886A (en) * 1977-07-05 1981-09-29 James T. Dennis Automatic record changer

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2457106A (en) * 1944-01-24 1948-12-21 Farnsworth Res Corp Phonograph apparatus
US2983515A (en) * 1950-05-11 1961-05-09 Admiral Corp Automatic record player
US3110500A (en) * 1959-05-19 1963-11-12 Hansen Hans Christian Phonographs
US3197212A (en) * 1963-03-04 1965-07-27 Warwick Electronics Inc Record changer
US3218078A (en) * 1962-11-28 1965-11-16 Vm Corp Automatic record changer
US3248867A (en) * 1963-11-07 1966-05-03 Sunbeam Corp Clock motor and movement
US3346261A (en) * 1965-07-26 1967-10-10 Admiral Corp Phonograph spindle actuation lever
US3394938A (en) * 1964-10-08 1968-07-30 Warwick Electronics Inc Record changer

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2457106A (en) * 1944-01-24 1948-12-21 Farnsworth Res Corp Phonograph apparatus
US2983515A (en) * 1950-05-11 1961-05-09 Admiral Corp Automatic record player
US3110500A (en) * 1959-05-19 1963-11-12 Hansen Hans Christian Phonographs
US3218078A (en) * 1962-11-28 1965-11-16 Vm Corp Automatic record changer
US3197212A (en) * 1963-03-04 1965-07-27 Warwick Electronics Inc Record changer
US3248867A (en) * 1963-11-07 1966-05-03 Sunbeam Corp Clock motor and movement
US3394938A (en) * 1964-10-08 1968-07-30 Warwick Electronics Inc Record changer
US3346261A (en) * 1965-07-26 1967-10-10 Admiral Corp Phonograph spindle actuation lever

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3894740A (en) * 1972-10-13 1975-07-15 Philips Corp Switching device, particularly for a record player or changer
US3963245A (en) * 1974-01-12 1976-06-15 Trio Electronics Incorporated Apparatus for automatically returning a pick-up arm in a record player
JPS51103150A (en) * 1975-03-07 1976-09-11 Matsushita Electric Ind Co Ltd Kinzokuseikibanheno goseijushiseibuhinno itsutaikeiseihoho
JPS5324220B2 (fr) * 1975-03-07 1978-07-19
JPS51115928U (fr) * 1975-03-14 1976-09-20
JPS5411848Y2 (fr) * 1975-03-14 1979-05-26
JPS5226938U (fr) * 1975-08-18 1977-02-25
JPS5535830Y2 (fr) * 1975-08-18 1980-08-23
FR2397039A1 (fr) * 1977-07-05 1979-02-02 Dennis James Changeur automatique de disques
US4291886A (en) * 1977-07-05 1981-09-29 James T. Dennis Automatic record changer

Also Published As

Publication number Publication date
FR2139116B1 (fr) 1973-07-13
GB1356491A (en) 1974-06-12
NL7206567A (fr) 1972-11-29
DE2222962A1 (de) 1972-12-07
BE784075A (fr) 1972-09-18
FR2139116A1 (fr) 1973-01-05
IT958050B (it) 1973-10-20
CA948115A (en) 1974-05-28

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