US3847400A - Record players - Google Patents

Record players Download PDF

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Publication number
US3847400A
US3847400A US00353013A US35301373A US3847400A US 3847400 A US3847400 A US 3847400A US 00353013 A US00353013 A US 00353013A US 35301373 A US35301373 A US 35301373A US 3847400 A US3847400 A US 3847400A
Authority
US
United States
Prior art keywords
gear wheel
pawl member
engagement
operating member
pawl
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
Application number
US00353013A
Other languages
English (en)
Inventor
P Evans
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GLENBURN ENG Ltd
Original Assignee
GLENBURN ENG Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by GLENBURN ENG Ltd filed Critical GLENBURN ENG Ltd
Application granted granted Critical
Publication of US3847400A publication Critical patent/US3847400A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • 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

Definitions

  • ABSTRACT An automatic record player having a record changing mechanism which is drivenby a driving means comprising a first gear wheel capable of driving engagement with the second gear wheel rotatable with the turntable, the first gear wheel having a gap in its teeth which during playing of a record lies adjacent the second gear wheel so that the first gear wheel remains stationary.
  • a pawl member is pivotally mounted on the first gear wheel for pivotal movement into and out of engagement with a part associated with the second gear wheel.
  • An operating member is movably mounted on the first gear wheel for engagement with the pawl member to move the pawl member about its pivotal axis. The operating member is engaged by an actuating means provided on the record player. At the end of the playing of the record the actuating means causes movement of the operating member to move the pawl member into its engaging position thus bring the first and second gear wheels into driving engagement.
  • This invention relates tov a record player for playing disc records, which includes a mechanism for executing a cycle of automatic operation upon conpletion of the playing of a record.
  • cycle of automatic operations may comprisethe repositioning of the pick-up and, in some cases the feeding of a new record to the playing position in preparation for the next reproduction.
  • the invention more particularly relatesto an automatic record player of the type specified, which incorporates a driving means for the automatic mechanism in the form of a first gear wheel capable of driving engagement with a second gear wheel rotatable with a turntable, the first gear wheel having a gap in its teeth which during playing of a record, lies adjacent the second gear wheel so that the first gear wheel remains stationary, drive means being provided comprising an abutment member carried by the first gear wheel and movable into driving engagement with the second gear wheel to start movement of the first gear wheel to cause the teeth of the two gear wheels to mesh, whereby the first gear wheel is rotated through a'single revolution, during which said cycle of automatic operations is executed, and returned to its initial position when the gap in the teeth of the first gear wheel again lies adjacent the second gear wheel.
  • a driving means for the automatic mechanism in the form of a first gear wheel capable of driving engagement with a second gear wheel rotatable with a turntable, the first gear wheel having a gap in its teeth which during playing of a record, lies adjacent the
  • An object of the present invention is to provide a new and improved record player of the typespecified.
  • the drive means includes a pawl memberpivotally mounted on the first gear wheel for pivotal movement of an abutment portion of the pawl member which is moved into and out of a position for engagement with a part associoperating member to move said abutment portion into position for engagement with said part of the second gear wheel.
  • the operating member may be slidablymounted on the first gear wheel.
  • the pawl member may include a mounting portion which engages said operating member on the underside thereof whereby the'operating member is supported, at
  • the operating member may be provided with means for engagement with the pawl member to move the pawl member or said abutment portion thereof out of said position.
  • the operating member may be provided with means for engagement with a part fixed relative to the record player, whereby rotation of the first gear moves said portion of. the operating member into engagement with said fixed part to cause movement of the operating member in a direction to move the abutment portion of the pawl out of said position.
  • FIG. 1 is a plan view of an automaticrecord player embodying the present invention
  • FIG. 2 is an underneath plan view of the record player of FIG. 1;
  • FIG. 3 is a diagrammatic exploded'perspective view, to an enlarge scale, of part of the record player of FIG. 1.
  • a record player deck plate is indicated generally at 9 and, in conventional manner, has a turntable 14 mounted thereon for rotation about an axis 15, a pickup arm 17 and a control arm 8 as well as the usual operating controls.
  • the turntable l4 has a downwardly depending boss 7 which is received in a bearing on the deck plate 9, not shown, to rotatably mount the tumtable on the deck plate.
  • the deck plate 9 carries a mechanism indicated generally at 6 arranged to perform the usual record changing cycle of operations'at the end of playing of a record.
  • the mechanism .6 is driven by a first gear wheel 10 having a plurality of gear teeth 11 which mesh with gear teeth 12 of a second gear wheel 13 formed integrally on the lower end of the turntable boss 7 so as to rotate with the turntable about the axis of rotation 15 thereof.
  • a pawl member 18 is pivotally mounted on the first gear wheel 10 by means of a pivot pin 19 fixed to the pawl member and received in a passage 20., see FIG. 2, in the gear wheel 10, the lower end of which is closed by a plate 21 rivetted into position.
  • the pivot pin 19 has a spherical end'which engages on the plate 21 and so provides Y a relatively friction free pivot for the pawl member 18.
  • the pawl member 18 has an abutment portion 22 which is movable intoa position where it projects-outwardly of the periphery of the first gear wheel and hence engages a dog 5 formed on the boss 7 of the turntable, to cause initiation of rotation of the first gear wheel when the second gear wheel is rotated. If desired the abutment portion may engage some other part associated with the second gear wheel such as one of the teeth 12 thereof.
  • the teeth 11 thereof are engaged with the teeth 12 of the second gear wheel 13 and rotation of the first gear wheel continues for a single revolution until the gap 16 again lies adjacent the second gear wheel.
  • the abutment portion 22 of the pawl member. 18 has'been moved out of said position so that when the gap 16 again lies adjacent the second gear wheel rotation of the first gear wheel ceases.
  • the pawl member 18 is made as a moulding in a suitable plastics material and has a transversely extending limb 23 with a hooked end portion 24.
  • a rib 25 projects 45 which engages in a-slot 46 in the first gear wheel so that in co-operation with the lugs 33 the operating member is constrained to slide rectilinearly of the first gear wheel.
  • the first gear wheel is mounted on the record player 47 so that part of the member 42 is positioned outwardly from the end of the limb 23. Also moulded I integrally with the remainder of the pawl member 18is a flexible part 26 which is normally biassed into engagement with the part 27 of the hooked portion 24.
  • the hooked portion 24 also carries a transversely extending lug 28 which has a hemispherical upstanding part 29.
  • the part 29 engages the undersurface of an operating member 30 at approximately the position of the centre of gravity thereof and so the operating member 30 is approximately balanced on the hemisperical part 29 so that the weight of the operating member 30 is carried wholly or almost wholly by the pawl member 18 through the hemispherical part 29.
  • the operating member 30 At its forward end 31 the operating member 30 is cranked downwardly to a position underneath the surface of the first gear wheel ltland forwardly, as indicated at 32 and the forward end is engaged between a pair of upstanding lugs 33 provided on the first gear wheel 10.
  • the downwardly extending part passes through a slot 34 in the gear wheel 10 so that the end forwardly extending part lies below the plane of the undersurface of the gear wheel 10 and hence underlies the usual cam track 10a provided on the upper surface of the gear wheel 10.
  • the pawl member has a downwardly depending projection 18a for engagement with the inwardly facing surface of the cam track 10a provided on the first gear wheel 10 to limit outward movement of the pawl member 18.
  • the operating member 30 hasa transversely extending lug 35 positioned for engagement with the rib 25 on the pawl member 18.
  • the operating member 30, at its rearward end is of generally T-shaped configuration as indicated at 36 and has a forwardly extending part 37 for engagement with the flexible element 26 of the pawl member 18.
  • the T- shaped part also has a generally curved abutment surface 38 for engagement by a' wire actuating means 39, the curved part 38 being generally centered about the axis or rotation of the first gear.
  • the T-shaped part 36 is also provided with an upstanding lip 40 for engage.- ment with a pair of downwardly depending pegs 41 provided on a member 42, fixed to the underside of the record player deck plate 9, and spaced adjacentthe axis closely above the first gear to prevent upward movement of the pawl member 18 and operating member 30 out of engagement with the first gear.
  • the actuating wire 39 is caused to be moved inwardly towards the axis of the pivot of the first gear wheel 10 either by the usual inward motion of the record player pick-up arm 17 at the end of playing a record or manually and the end of the wire 39 engages the surface 38 and displaces the operating member 30 transversely of the first gear wheel 10.
  • the curved part 38 is provided as a safety precaution in case a user moves the pick-up arm inwardly during a record changing cycle of operation. If this were done and if the curved part 38 were not provided then as the first gear wheel 10 rotates the wire 39 would engage a side portion of the operating member 30 and thus damage would be caused.
  • the flexibility of the element 26 ensures that there is no damage to the mechanism of the record player 47" if outward movement of the pawl member 18 prevented for any reason, for example if the abutment portion 22 thereof is aligned with the dog 5 which would prevent outward movement of the pawl 18.
  • the mechanism has the usual tap back facility so that the pawl member 18 does not drivingly engage the dog 5 except when a large and rapid inward movement of the pick-up arm occurs at the end of playing a record when the pick-up is travelling along the run out groove of the record.
  • a record player for playing disc records which includes a mechanism for executing a cycle of automatic operations upon completion of the playing of one record, incorporating a driving means for the automatic mechanism in the form of a first gear wheel capable of driving engagement with a second gear wheel rotatable with the turntable, the first gear wheel having a gap in its teeth which, during playing of a record, lies adjacent the second gear wheel so that the first gear wheel remains stationary, drive means being provided comprising a pawl member carried by the first gear wheel and movable into driving engagement with a part associated with the second gear wheel to start movement of the first gear wheel to cause the teeth of the two gear wheels to mesh, whereby the first gear wheel is rotated through a single revolution during which said cycle of automatic operations is executed and returned to its initial position when the gap in the teeth of the first gear wheel again lies opposite the second gear wheel, wherein the pawl member is pivotally mounted on the first gear wheel in relatively friction free pivot means for pivotal movement of an abutment portion of the pawl member into and out of a position for
  • a record player according to claim 1 wherein the pawl and operating members are provided with an overload connecting means comprising an elongate inherently resilient tongue member integral with the pawl member and an abutment part on the operating mem-- ber engageable with said tongue member and effective to communicate movement of the operating member to the pawl member to move the abutment portion of the pawl member into said position for engagement with said part of the second gear wheel and to permit movement of the operating member in said direction to move the abutment portion of the pawl member into said position if movement of the pawl member is prevented.
  • an overload connecting means comprising an elongate inherently resilient tongue member integral with the pawl member and an abutment part on the operating mem-- ber engageable with said tongue member and effective to communicate movement of the operating member to the pawl member to move the abutment portion of the pawl member into said position for engagement with said part of the second gear wheel and to permit movement of the operating member in said direction to move the abutment portion
  • a record player as claimed in claim 2 wherein said tongue is resiliently biased into engagement with a part of the pawl member and is movable away from said part against said resilient bias.
  • a record player as claimed in claim 1 wherein the operating member is provided with means for engagement with a part fixed relative to the record player whereby rotation of the first gear moves said portion of the operating member into engagement with said fixed part to cause movement of the operating member in a direction to move the abutment portion of the pawl member out of said position.

Landscapes

  • Holding Or Fastening Of Disk On Rotational Shaft (AREA)
  • Automatic Disk Changers (AREA)
  • Transmission Devices (AREA)
US00353013A 1972-04-20 1973-04-20 Record players Expired - Lifetime US3847400A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1829172A GB1424681A (en) 1972-04-20 1972-04-20 Record players

Publications (1)

Publication Number Publication Date
US3847400A true US3847400A (en) 1974-11-12

Family

ID=10109948

Family Applications (1)

Application Number Title Priority Date Filing Date
US00353013A Expired - Lifetime US3847400A (en) 1972-04-20 1973-04-20 Record players

Country Status (3)

Country Link
US (1) US3847400A (https=)
DE (1) DE2320088C3 (https=)
GB (1) GB1424681A (https=)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202010006923U1 (de) 2010-05-18 2010-08-19 Jaeniche, Wilhelm Harnauffangbeutel

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3394938A (en) * 1964-10-08 1968-07-30 Warwick Electronics Inc Record changer

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3394938A (en) * 1964-10-08 1968-07-30 Warwick Electronics Inc Record changer

Also Published As

Publication number Publication date
DE2320088A1 (de) 1973-11-08
DE2320088B2 (https=) 1980-02-07
DE2320088C3 (de) 1980-10-09
GB1424681A (en) 1976-02-11

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