US2468198A - Magazine type magnetic recorder with multiple lane tape and traversing transducer - Google Patents

Magazine type magnetic recorder with multiple lane tape and traversing transducer Download PDF

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Publication number
US2468198A
US2468198A US608734A US60873445A US2468198A US 2468198 A US2468198 A US 2468198A US 608734 A US608734 A US 608734A US 60873445 A US60873445 A US 60873445A US 2468198 A US2468198 A US 2468198A
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United States
Prior art keywords
tape
magazine
magnets
switch
housing
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Expired - Lifetime
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US608734A
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English (en)
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Herman S Heller
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Individual
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Individual
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Priority to BE467579D priority Critical patent/BE467579A/xx
Application filed by Individual filed Critical Individual
Priority to US608734A priority patent/US2468198A/en
Priority to GB22168/46A priority patent/GB615116A/en
Priority to CH268583D priority patent/CH268583A/de
Priority to FR931769D priority patent/FR931769A/fr
Application granted granted Critical
Publication of US2468198A publication Critical patent/US2468198A/en
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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/18—Driving; Starting; Stopping; Arrangements for control or regulation thereof
    • G11B15/1883—Driving; Starting; Stopping; Arrangements for control or regulation thereof for record carriers inside containers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/675—Guiding containers, e.g. loading, ejecting cassettes
    • G11B15/67563—Guiding containers, e.g. loading, ejecting cassettes with movement of the cassette perpendicular to its main side, i.e. top loading
    • G11B15/67573—Guiding containers, e.g. loading, ejecting cassettes with movement of the cassette perpendicular to its main side, i.e. top loading of the cassette without holder
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/02—Containers; Storing means both adapted to cooperate with the recording or reproducing means
    • G11B23/04—Magazines; Cassettes for webs or filaments
    • G11B23/08—Magazines; Cassettes for webs or filaments for housing webs or filaments having two distinct ends
    • G11B23/087—Magazines; Cassettes for webs or filaments for housing webs or filaments having two distinct ends using two different reels or cores
    • G11B23/08707—Details
    • G11B23/0875—Indicating means, e.g. quantity of tape
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/02—Containers; Storing means both adapted to cooperate with the recording or reproducing means
    • G11B23/04—Magazines; Cassettes for webs or filaments
    • G11B23/08—Magazines; Cassettes for webs or filaments for housing webs or filaments having two distinct ends
    • G11B23/087—Magazines; Cassettes for webs or filaments for housing webs or filaments having two distinct ends using two different reels or cores
    • G11B23/08707—Details
    • G11B23/08757—Guiding means

Definitions

  • This invention relates generally to sound recording and reproducing machines of the type employing a long record tape.
  • the invention is particularly applicable to sound recording and reproducing machines of the magnetic tape type, and will hereinafter be described primarily in that connection, though without necessary limitation thereto since certain features of the invention may have application to equipment utilizing record tapes of other than magnetic character.
  • the invention is directed particularly to recording and reproducing machines of the type utilizing a multiplicity of recording lanes spaced transversely across the tape. These lanes are normally used consecutively, with the tape traveling first in one direction and then in the other between a pair of tape reels.
  • One advantage inherent in multiple lane recording resides in the fact that the tape may be much shorter for a given duration of recording time. For instance, assuming eight lanes across the tape, the tape need only be one-eighth as long as the tape or wire necessary for an equivalent recording time in single lane recording.
  • An accompanying advantage is that the time duration for running the tape from end to end is reduced by the same factor, for example, by a. factor of eight, so that" the rewinding time is much reduced. Reference may be had to Patent No.
  • the present invention in certain of its aspects is broadly applicable to both of the aforementioned types of multiple lane recording, it is here specifically and illustratively disclosed in the form wherein but one set of magnets is provided and said set of magnets is arranged for relative transverse movement across the tape for selective or successive cooperation with the various recording lanes thereof.
  • the invention deals with improvements in the last-mentioned class of multiple lane recording apparatus.
  • Magnet recording and reproducing machines have previously been known in which the reels and tape guides are incorporated in a portable magazine arranged for quick detachable connection to the main frame of the machine, which latter contains the drive motor, certain drivin gear, and sometimes carries the magnets.
  • the act of mounting this magazine on the main frame automatically engages the driving gear with the reels and brings the tape into operative relationship to the magnets.
  • the present invention is concerned with improvements in machines of the class having such a magazine.
  • Certain specific objects of the invention are as follows: to provide a means for automatically engaging and disengaging the tape from certain drive rolls permanently supported on the main frame of the machine as the magazine is mounted on or removed from the latter; to provide an improved means for closing and opening the magnets on the tape as the magazine is mounted on or removed from the main frame; to provide improvements in means for guiding the tape accurately through or past the magnet unit; to provide improved means for moving the magnet unit step-by-step transversely across the tape for cooperation with successive lanes thereof, including the provision of locking means for assuring that the magnet unit will always be positioned precisely and unwaveringly in alignment with any selected record lane; and to provide improved manually operable means for locking and unlocking the magazine on the machine, and simultaneously therewith moving the tape into operative relationship with the driving rolls and the magnets.
  • Figure 1 is a plan section of a sound recording and reproducing machine in accordance with the invention taken on line l-l of Fig. 2;
  • Figure 2 is a front elevation thereof
  • Figure 3 is a view somewhat similar to Fig. 1, but considerably enlarged, and with the reels and also the portion of the machine below the magazine omitted;
  • Figure 4 is a view similar to Fig. 3, but showing a different position of the parts;
  • Figure is a view similar to Fig. 9 but show- 7 ing a diiferent position
  • Figure 11 is a side elevation of a portion of the manually operable mechanism appearing in plan in Figs. 9 and 10;
  • Figure 12 is a vertical section taken on line l2-l2 of Fig. 3;
  • Figure 13 is a section taken on broken line l3
  • Figure 14 is a section taken as indicated by line I4l4 of Fig. 13;
  • Figure 15 is a section taken on line l5l5 of Fig. 14;
  • Figure 16 is a section taken on line Iii-l6 of Fig. 14;
  • Figure 17 is a horizontal section l"
  • Figure 18 is a view similar to Fig. 17 but showing a different position of the parts;
  • Figure 19 is a transverse section taken on line l3
  • Figure 20 is a detail section taken on line 2828 of Fig. 3:
  • Figure 21 is a detail section taken on line 2l2l ofFig.3;
  • Fig. 22 is a detail taken as indicated by line 2222 of Fig. 16;
  • Figure 23 is a detail taken on line cross section of the pole piece and shell, taken as indicated by line 23-23 of Fig. 14;
  • Figure 24 shows schematically a typical electrical circuit for the machine:
  • Figure 25 is a plan view of certain modifications which may be incorporated in the magazine, the magazine except for such modifications being understood to be entirely similar to the one originally described;
  • Figure 26 is a detail section taken on line 28-28 of Fig. 25. a
  • the illustrative machine comprises a motor unit embodying a main frame or housing I having a top plate 2, and a relatively flat reel-carrying unit or magazine 3 detachably mounted on said top plate 2.
  • Magazine 3 embodies a frame in the form of a container, preferably of plastic, and comprising bottom wall 4 adapted to rest on housing top plate 2, and a removable cover comprising top 5 and side wall 3, the lower edg of the latter being adapted to seat on a marginal upwardly facing shoulder 1 on bottom wall 4.
  • wall 4 has a short p0- sitioning flange 8 just inside side wall 6.
  • a pair of pins 8 which are engageable in corresponding apertures in the side wall 8 of the removable cover.
  • the other side of the removable cover 5 carries a pin i0 engageable in an aperture in a flat spring ll secured to the underside of wall 4 and extending upwardly as shown in Fig. 12.
  • the cover may be removed by moving spring ll out of engagement with pin l0, and then tilting the cover upwardly and disengaging it from the pins 8 at the other s de.
  • the bottom wall 4 of magazine 3 has a plurality of apertures l2, here three in number, adapted to receive positioning pins l3 set into and projecting upwardly from top plate 2 of main housing I. Means later to be described are provided for locking the magazine 3 to these positioning pins I3.
  • the two reels i4 and II for the record medium here a magnetic tape l6, are positioned at opposite ends and at the forward side of the magazine 3.
  • the tape passes over and between a pair of drive rolls l1 and I8, preferably rubber faced, and positioned on axes which are in a line parallel to the line joining the axes of the reels, and spaced somewhat rearwardly and inwardly of the reels.
  • the stretch of tape between the two rolls I1 and I8 passes between two blocks l9 and 20 constituting the magnet head and understood to carry the later described translating and erasing magnets.
  • the tape is formed with loops 2
  • Each such guide consists of a semi-cylindric block 25, about which is clamped a felt strip 26, designed to smooth and stabilize the travel of the tape.
  • Each 'block 25 has guide flanges 21 for the edges of the tape, and is mounted on a stationary plate 28 secured to a slightly elevated platform 28 formed on wall 4 (see Fig. 20)
  • Bottom wall 4 of magazine 3 is formed with apertures 30 to receive with clearance tape driving rolls I1 and I8.
  • each of said tape driving rolls is mounted on a shaft 3i journalled in bearing housing 32 carried by and secured to top wall 2 of housing I, the shaft 3
  • Bottom wall 4 of magazine 3 also has openings 36, surrounded by upstanding flanges 31, to receive with clearance reel supporting and driving drums 38, the latter being formed on the upper ends of shafts 33 Journaled in bearing housings 40 secured to the under side of plate 2, and driven through over-running or one-way clutches 4
  • These over-running clutches may be of conventional character. and incorporate frictional slip devices also of well known type. ⁇ t is deemed unnecessary to illustrate or descri the specific details of such devices as they and their functions are well known in the art. For one example, see United States Patent No. 2,209,582 to Ross.
  • the one-way clutches drive the tape in one direction only, for the purpose of winding up the tape, one clutch driving and the other running freely for each direction of the tape.
  • the frictional slip feature is a common expedient employed to permit slippage in the drive when or ii the roll of tape on the driven take-up reel becomes so great in circumference that the reel tends to wind up the tape at a faster rate than it arrives from the positively driven drive rolls.
  • Bottom wall 4 of magazine 3 also is formed with an aperture 43 adapted to receive with suitable clearance magnet carrying blocks l8 and 23, un-
  • the drive motor 44 is mounted in a vertical position in housing I, and drives main belt drive pulley 45 through suitable enclosed reduction gearing.
  • the aforementioned belts 35 are threaded about the several pulleys 34, 42, and 4-5 as shown clearly in Fig. 8.
  • the two drive rolls l1 and 18 are directly driven from motor 44 through belts 35, while the two reels l4 and IE will be alternately driven in the proper direction through the described one-way clutches 4
  • the reel toward which the tape is fed by the drive rolls l1 and 16 will always be the one which is driven through its corresponding one-way clutch, the other reel simply idling at such time.
  • Each of the aforementioned reel-supporting and driving drums 88 extends through and somewhat above the surrounding annular flange 31, and carries a plurality of driving pins 46 receivable in sockets 41 formed in disk 48 press fitted within a socket 49 formed in the hub 50 of the reel.
  • the reel has a central or axial sleeve 52 which is engaged by the rounded end of a spring pressed plunger 53 working in a mounting 54 secured to the under side of container top 5.
  • Magnet block 20 is tightly secured to a platform 55 secured in turn to a head 56 on the upper end of a post 51, and the opposed magnet block I! is mounted on platform 55 for movement toward and from block 2!).
  • Horizontal guide pins 58 set into block 20 and slidably received in corresponding apertures in block I9 assure precise alignment of the two blocks at all times.
  • Magnet block 20 has at the bottom a projecting shelf portion 59 receivable in an undercut or notch 60 in the bottom of block l9, and springs 6
  • Each of the blocks l9 and 20 contains a plurality of electromagnets 62 (Figs. 14 and 16).
  • Each of these electromagnets 62 contains an axial magnetic pole piece 63 of rectangular cross section.
  • this pole piece is embedded in a plastic shell 64, of square cross section, which is slidable longitudinally or axially in an aperture of corresponding cross section extending through the electromagnet.
  • the tip of the pole piece is exposed so that it may engage the face of the tape.
  • the tip portion of the pole piece may typically be of a width of the order of .023 inch, while back of the extreme tip a distance of approximately 3%", the width may be increased advantageously to about .055 inch.
  • the pole piece may be of a.
  • each of blocks 18 and 20 contains three of the electromagnets 62, arranged in succession longitudinally of the tape, it being understood that correspondingmagnets in the two blocks l9 and 20 are in direct axial alignment with one another.
  • the two outside magnets 62 are utilized for erasing purposes, and the center magnets are translating magnets for recording and/ or reproduction.
  • a feature of the present invention is the provision of a tape guide comprising a pair of separable guide plates 61 and 68 normally in face to face engagement and adapted to guide the tape during its travel between the two magnet blocks I9 and 20.
  • plate 61 is formed with a tongue 69 and plate 68 with a corresponding groove 10, a longitudinal slot or guide way for the tape being formed between the face of said tongue and the bottom of said groove.
  • the guide way may be .008 inch in depth.
  • the guide way is of such width as will receive the tape for free sliding movement therethrough. The fit is such, however, that the tape will be closely guided and will be precisely positioned by the device.
  • Plate 68 has at the bottom a projecting foot 1
  • the plates 61 and 68 are pressed down firmly against the positioning studs 12 by means of a flat spring 13 secured to the upper edge of the plate and engageable with the top wall of the magazine,
  • the two guide plates 61 and 68 are notched at the bottom, as indicated at 14, to clear the guide pins 58 and spring 6
  • the downwardly projecting legs formed by the provision of this notch engage over opposite ends of the shelf portion 59 of the block 20 in such manner as to confine the plates 61 and 68 against longitudinal movement relative to the magnets, all as may be clearly understood by inspection of Fig. 16.
  • tape guide plates 61 and 68 are provided with vertically elongated slots 15 through which project horizontal headed studs 16 set into posts 11 extending upwardly from bottom wall 4 of reel carrier unit 3, coil springs 16a being provided on said studs between the heads thereof and the plates, as clearly indicated in Fig. 3.
  • the vertical elongation of these apertures 15 assures that they will not participate in the vertical positioning of the plates 61 and 68, but the lit horizontally is relatively close and the studs 16 therefore serve to accurately position said plates in a horizontal direction. They also serve to carry these plates when the reel carrier unit is removed from the machine, at which time the plates 61 and 68 will of course be moved by spring 16a against the posts 11 (Fig. 4).
  • the plate 68 may be separated from the plate 61 against the yielding opposition of springs 16a, and the tape guide way thus opened to permit insertion or removal of the tape.
  • the guide plates 61 and 68 are provided with vertically elongated apertures 18 extending transversely across the tape and providing clearance for the pole pieces of the magnets in all vertical positions thereof.
  • this locking means comprises a longitudinally reciprocative arm or bar I8, formed of sheet metal,
  • the magazine is thus locked at three points when the described locking device is in the position of Fig. 3 and is released for removalin the position of Fig. 4.
  • the member I8 is slidably supported on a slightly elevated boss or table 84 formed on wall 4 near one end portion thereof, and is received and supported within a guide way 85 formed in the aforementioned platform 28 (see Fig. 20).
  • the arm I8 is also supported, in the area of its slot 88, in a guide way 88 formed in a slightly elevated table 81 formed on the wall 4 (Figs. 6 and 21) a strap or bridge member 88 mounted on the member 81 overlying arm 18 and being apertured at 88 to receive pin I3.
  • a spring arm 88 carrying a pin 8
  • a pin 88 projecting upwardly from top 2 of main housing I and receivable through a suitable aperture in the bottom of unit 8 (Fig. 21) is engageable with the free end of this spring arm 88 when the magazine 8 is mounted on housing I, acting at such times to lift said arm to the position'of Fig, 21, wherein pin 8I clears the upper side of arm I8.
  • pin 8I registers with aperture 82, and when the magazine is then lifted from housing I, spring arm 88 moves downwardly flush against plate 88, causing pin 8
  • Arm I8 is formed with a cross slot 84, which receives a crank pin 85 projecting upwardly through an arcuate slot 88 in wall 4 from a crank disk 81 8 rotatably mounted in the top of main housing I as shown in Fig. 6.
  • a pin 88 carrying a crank arm v 88, and the latter is pivotally connected by link I 88' to a crank arm IN on a shaft I82 rotatably mounted in the top of housing I, said shaft I82 having connected thereto an operating handle I88 which is at an elevation just above the upper side of the magazine 3 (Fig. 2).
  • arm I8 is also utilized to perform other functions, one of which is to shift the removable magnet block I8 into operative position as the magazine 8 is locked to the machine.
  • arm I8 has at its rearward end spaced extensions or legs I84 terminated by upwardly turned feet I85 adapted to engage the side of the magnet block I8 to move it from the open position of Figs. 18 and 4 to the closed position of Figs. 3 and 9.
  • the block I8 is normally urged to separate from the block 28 by virtue of the springs 6
  • the magnet blocks I9 and 28 are automatically separated; the tape guide unit consisting of plates 61 and 68 backs up against the posts II at such time, to a position free and clear of the pole pieces, and the magazine may be lifted from the machine.
  • the other function performed by the arm 18 in moving longitudinally between the positions of Figs. 3 and 4 is to move the tape into and out of operative engagement with the drive rolls II and I8.
  • a pair of links I86 are pivotally connected to arm I8, as at I 81, and said links I88 are pivotally connected to links I88, the latter being pivotally connected at I88 with a pair of swinging arms II 8 that are in turn pivotally mounted at their ends on magazine bottom wall 4 near the forward edge thereof, as shown at III.
  • Arms II 8 extend under and beyond the stretch of the tape extending between guides 25 and the corresponding drive rolls, and have upwardly turned projections II 2, surrounded by rubber sleeves II3, adapted for gripping engagement with the tape.
  • links I88 are pivotally connected to arms H4 arranged for longitudinal movement with reference to arms II8.
  • the arms II4 may have longitudinal slots II5 receiving pins II 6 projecting upwardly from arms H8.
  • the forward ends of arms II4 are provided with upwardly turned portions II'I, enclosed by rubber sleeves II8, adapted to grip the opposite face of the tape, i. e., the face opposite to that gripped by the member II2. That is to say, the tape passes between the two members H2 and Ill, and may be gripped or pinched therebetween.
  • the members H2 and II I are both separated from the tape.
  • links I88 at first are restrained against swinging outwardly by an interconnecting spring 8, and function to swing links I88 so as to move arms II4 longitudinally relative to arms I I8, thereby causing tape gripping elements III to magnet carrying post 51 tion, while engage the tape and press it firmly against elements II2. In this movement. the elements II1 firm grip on the tape, the rubber sleeves assuring a non-slipping engagement.
  • the members H1 and I tape further travel of arm 19 toward the position of Fig. 4 causes the links I06 to spread further apart, and, acting through links I08, to swing t e two arms IIO outwardly. Thereby the tape.
  • the aforementioned post 51 which carries the magnet head (Fig. 14) is in the form of a cylindrical shaft provided with a working fit in a bushing I2I set into a frame I22 secured within housing I, the bushing I2I having at its upper end a head flange I23 resting down on horizontal surface I24 of frame I22.
  • a stud I25 set into frame I22 has at its inner end a projecting through tical splineway I28 cut in to prevent rotation of the latter while permitting longitudinal travel thereof.
  • a stud I29 (Fi 16) carrying below the lower end of bushing I2I a flange I30 of a diameter somewhat larger than said bushing, and projecting downwardly below the latter is a cam follower pin I3I having a rounded lower end I32 bearing on the periphery of a stepping cam I33.
  • the cam I33 is mounted on a horizontal shaft I34 ' journeyna ed at opposite ends in depending extensions I35 and I36 of frame I22.
  • the aforementioned surface I24 of frame I22 is the top surface of a bridge-like member I31, and the latter has, somewhat above the lowermost end of bushing I2I, a downwardly facing horizontal surface I38.
  • a flat washer I39 Surrounding the bushing I2I and engaging this surface I38 is a flat washer I39. and against washer I39 and surrounding bushing I2I is an annulus I40 which serves as a carrier for certain presently described locking devices.
  • This annulus I40 has a reduced downwardly projecting sleeve-like portion HI, and confined between the lower end of the latter and the aforementioned flange I30 is a coil compression spring I42. the latter encircling the lower end portion of bushing HI.
  • Cam I33 and shaft step. by a mechanism I34 are rotated. step by including a ratchet wheel I44 mounted on shaft I34 and a pawl device I45 reciprocated in a vertical direction by a solenoid I46.
  • Solenoid I46 is mounted on a frame plate I41, hung from frame I22 by means of strap I48. It has a vertically reciprocative plunger I49, to
  • rolls I1 are radial with 10 which is secured the horizontal leg of the L-shaped pawl device I45, the vertical ing a vertically elongated slot I50 (see Fig. 12) engageable over the successive. ratchet teeth I5I of ratchet wheel I44.
  • the ratchet wheel is provided with eight ratchet teeth I5I.
  • the lands I53 of the teeth I5I are preferably substantially tangential with respect to the radii of the ratchet wheel, as clearly shown in Fig. 16.
  • a bracket I51 is secured to the upper end of solenoid plunger I43, being arranged to extend upwardly adjacent and somewhat beyond the upper side of the ratchet wheel.
  • a vertically elongated slot I58 is provided to pass the shaft I34.
  • bracket I51 At the top of this bracket I51 is a turned over lug I53, arranged to overlie the ratchet wheel.
  • This lug I59 engages the land I53 of one of the uppermost ratchet teeth when the solenoid plunger and pawl have descended sumciently to rotate the ratchet wheel through precisely 45.
  • a locking pin I60 carried by bracket I51 engages in the lowermost ratchet wheel slot I52 to limit the upward travel of the mechanism, and at the same time to lock the ratchet wheel against rotation.
  • This locking pin I50 has dropped sufficiently to clear the slot I52 by the time the downwardly travelling pawl device I45 strikes the upper end of the ratchet tooth with which it is engaged, so
  • the aforementioned stepping cam I33 has eight constant radius of successively inclockwise direction, as viewed in eighth of these lands, commencing with radius, are connected by somewhat sharply sloping risers I62.
  • the last or eighth land I'6I is connected with the first by a radial drop-of! shoulder I63.
  • the solenoid plunger I49 is lowered to operate the pawl device I45 as above described when the solenoid is energized.
  • the solenoid When the solenoid is de-energized, it is elevated back to its normal position by means of a coil compression spring I04 encircling the plunger I49 between the top of the solenoid and the horizontal leg of pawl device I45 secured to the upper end of the solenoid plunger.
  • the cam follower pin I3I is in engagement with about the mid-point of a land I6I of stepping cam I33 when ratchet wheel I44 is at rest.
  • Energization of solenoid I46 causes the ratchet wheel to be advanced through a 45 arc, and at about the midpoint of its travel, follower pin I3I is engaged by a cam riser I62 and elevated by one step. Itbeing understood that the cam I33 rotates step-by-step in a counterclockwise direction as viewed in Fig.
  • the cam risers I82 are so dimensioned as to enslots I82, thereby removing the locking teeth I88 gage and lift the cam i'ollower pin I3 I, and therefrom slots I8I.
  • The' ring I18 is so moved by means fore the magnet head, by a distance equal to the of its projecting pins I18 and the bell crank I68 predetermined center-to-center spacing of the earlier described (Fig. The position shown A feature of importance is the provision of a opposition of a flat return spring I88.
  • lever I86 is pivotally mounted at I81 within I18 secured to sleeve member I I as by snap ring a slot I88 in frame member I22 (Fig. 14) and has I11.
  • Sunk in the upper side of annulus I88 is an upwardly extending arm I88 projecting a diametrical way or slot I18, wherein are slidably through opening 43 in magazine wall I, the upper Similar spac d t e h h e ei h in m e which buttons I9I mounted on brackets I82 secured to are engageable in corresponding slots I8I formed plate 23 bear on the ther face of the tape, di-
  • buttons I86 and I8I the lever I86 is swung ashort
  • the center-to-center spacing of the teeth and of distance, pressing inwardly on micro-switch butthe corresponding grooves is made equal to the 55 ton I88 and actuating the latter.
  • This microdistance the post 51 is elevated on each actuation switch is employed in a presently described electance of the recor ing lanes on the tape.
  • Each I85 is of a conventional spring pressed type, yieldsuitable arcuate slots I85 formed in the portion of position of Fig. 14.
  • FIG. 23 shows In the position of Fig. 17, the locking elements schematically an electrical circuit for the machine I18 are in their inward positions, and their locking as above described.
  • Fig. 24 shows two decks I81 teeth I88 are inserted snugly in the grooves" I8I and I88 of a switch operated by the previously dein post 61, so as to lock the latter rigidly against scribedratchet-driven shaft I38, and which apthe slightest vertical movement. Rotation oi the pear in side elevation in Fig. 12.
  • Each deck con- 201 is adapted to sweep successively over switch contacts carried by an insulation stator 202 which may be mounted on the machine as in the manner illustrated in Fig. 12.
  • the several switch contacts carried by the stator are spaced 45 apart, and contact is made therewith successively as the shaft [34 is ratchet-driven through successive 45 movements.
  • a brush numbered 203 in the case of deck I91, 204 in the case of deck 1'98, mounted on the stator and contacting at all times the collector ring on the rotor.
  • Figure 24 shows conventionally the three pairs of electromagnets 82, the center pair being translating magnets for recording and/or reproduction, and the two outside pairs being erasing magnets. Each such pair is electrically connected 'in series, and one end of each pair is grounded, as indicated at 205.
  • the ungrounded end of the .translating magnets is connected by lead 206 to the contacts 201 and 208 of a gang switch generally indicated by numeral 209.
  • switch contact 201 is a switch contact 210 connected to microphone jack 2
  • Switch arm 212 is connected by lead 213 to the input terminal of amplifier 2.
  • the output terminal of amplifier 2 is connected by lead 2l5 to movable switch arm 2i9 adapted to make alternately with contact 208 and with a switch contact 2
  • switch arms 2 l2 and 210 are interconnected so as to move together, being in contact with contacts 1m and 208, respectively, for the "Record position, and with contacts 201 and 211, respectively, for "Reproduce.”
  • the microphone In the Record" position, the microphone, not shown, is connected to microphone jack 2
  • the translating magnets are connected by lead 206, switch contact 201, contact arm 212, and lead 2l3 to the input end of the amplifier, and from the amplifier output via lead 215, switch arm 219, switch contact 211, and lead 218 to speaker 2l9.
  • the translating magnets are in circuit with the speaker.
  • the reversible drive motor 44 is indicated in Fig. 24 as of a split phase capacitor type, having four external leads 220, 221, 222, and 223, two for each phase.
  • Numeral 224 designates a source of alternating current power, and one side thereof is connected by lead 225 and lead 220 to one phase of motor 44, the other side of-the same phase of the motor being connected by lead 222 and lead 229 to the other side of the power source through motor on-and-ofi switch 221.
  • a lead 228 branching from lead 229 is connected to a movable switch arm 229, switch contact 230, and .lead 231 to motor lead 223 connected to the other phase of motor 44, while the other side of the last-mentioned phase is connected by lead 221, switch contact 232, movable switch arm 233, and lead 234 to power lead 225 leading back to the .power source.
  • both phases of the motor are across the power source.
  • the two movable switch arms 229 and 233 are operated by a solenoid 235 which when energized holds them in the position .shown in Fig. 24.
  • the switch is of the type such
  • the magnets are accordingly in cir- 'to the other, whereby the that when the solenoid 235 is de-energized, switch arms 229 and 233 make with contacts 238 and 231, respectively.
  • Contact 239 is connected to motor lead HI, and contact 231 is connected to motor lead 223.
  • the switch is in the alternative position, that is, with switch arms 229 and 233 against contacts 238 and 231, respectively, the one phase of the motor 44 is reversed in polarity with respect direction of rotation of the motor is reversed.
  • energization and de-energization of the solenoid effects drive of the motor in one direction or the other, thereby accomplishing drive of the tape in one direction or the other.
  • Solenoid 235 is connected by lead 238 to a movable switch arm 239 of a manual reverse switch 240, switch arm 239 being normally in contact with switch contact 241 connected by lead 242 to alternate stator switch contacts 243 of switch deck 198.
  • the switch rotor being in a position such that its contact 201 is in engagement with one of the switch contacts 243, the circuit is closed via collector ring 200, brush 204 and lead 244.
  • solenoid 235 will be energized and the motor will drive in one direction.
  • Manual reverse switch 240 includes a movable switch arm 245 and an opposed contact 248, the arm 245 normally being out of contact with contact 248.
  • Switch arms 239 and 245 are interconnected, in such manner that when the manual reverse switch is operated, switch arm 239 breaks from contact 2 and switch arm 245 makes with contact 246. Upon release, the switch returns to the position indicated.
  • Switch arm 245 is connected by lead 241 to the remaining switch contacts 248 on the stator of switch deck I98.
  • Switch contact 246 is connected by lead 249 with movable switch arm 239.
  • the stator of switch deck I91 has one set of switch contacts 250, and a set of intervening contacts I, adapted to be swept successively by the switch arm 26I of the corresponding rotor.
  • the contacts 250 are connected by lead 252 to one set of erasing magnets, and contacts 25I by lead 253 to the other set of erasing magnets.
  • a high frequency oscillator 254, which constitutes the source of erasing current, has one output lead 255 connected to brush 203 bearing on the collector ring 200 of the switch deck I91.
  • the oscillator output lead 255 is alternately connected to one set of erasing magnets and then the other as the switch rotor is stepped ahead in consonance with the stepping operation of the previously described pawl and ratchet mechanism.
  • the other oscillator output lead 256 is connected to a switch contact 251, contacted by a movable switch arm 258, which latter is connected to ground.
  • the contact 251 and switch arm 258 are a part of the gang switch 209, switch arm 258 making with contact 251 when the switch is in the Record" position, and opening the oscillator circuit to ground in the Reproduce positlon.
  • the other oscillator output terminal is connected to ground through the described switch, thereby completin the circuit. Connections are so made that during recording with the tape I6 travelling toward the right, as viewed in Fig. 24, the lefthand erasing magnet will be energized through the switch I 91; and with the tape travelling in the opposite direction, the right-hand erasing obliterates any past history thereon, and then the recording magnet, the remaining set of erasing magnets being open circuited at the time. For the "Reproduce" position of switch 209, the oscillator circuit is open at switch 209.
  • Fig. 24 also shows the stepping solenoid I48 which actuates the pawl and ratchet mechanism to move the magnet head from lane to lane, as well as, through shaft I36, to move the rotors of switch decks I91 and I98 ahead step by step, as indicated by the dash lines in Fig. 24.
  • the solenoid I46 is shown as connected by one lead 259 to one side of the power source, and by a lead 260 to one side of the aforementioned micro-switch I95 previously described as actuated by the tape. The other side of said micro-switch I95 is connected by lead 26I and lead 225 back to the other side of the power source.
  • the solenoid is thus energized to perform the various functions already described by closure of micro-switch I95, and it has already been described how'this micro-switch may be closed by enlargements formed on the Any other means for by the tape may of an indicator device 262 embodying an arm 263 pivotally mounted as at 266 on a bridge member 265 and urged by a coil spring 266 to bear constantly on the periphery of the tape roll 261 on one of the reels. Pivotally connected to the front end of arm 263 is a scale sector arm 268 provided with a scale 269 which is visible through the transparent top wall of the magazine.
  • the arm 268 is yieldingly positioned normally in the full line position with respect to arm 263 by means of a spring-pressed detent 216 carried by the arm 268 and engageable in a suitable hole in the am 263.
  • a fixed indicator line 21I inscribed or engraved on the transparent top wall of the mazezine above scale 269 cooperates with said scale 269 and permits the obtainment of reference numerals by which any desired point of the recording on the tape may subsequently be quickly found.
  • the arm 269 is pivotally swung to the folded position indicated, and a hole 212 in arm 263 is at that time engaged by springpressed detent 210.
  • the arm 269 will be yieldingly supported in the position shown in dotdash lines.
  • a spring 213 mounted within the magazine may be engaged by the end of the arm 263, supporting said arm in a position clearing the reel I5, as will be readily understood.
  • a. motor unit embodying a housing, a drive motor in said housing, a rotatable drive roll mounted on and projecting from one side of said housing, means driving said drive roll from said motor, and a separable magazine unit adapted for quick demountable attachment to said side of said housing, said magazine adapted to receive said drive roll, locking means on said magazines for locking said magazines to said motor unit, record tape supporting means within said magazine, and means operable by said locking means for moving said tape into and from a position of peripheral driving engagement with said drive roll.
  • a motor unit embodying a housing, a drive motor in said housing, a rotatable drive roll mounted on and projecting from one side of said housing, means driving said drive roll from said motor, and a separable magazine unit comprising a container adapted for quick demountable attachment to said side of said housing, said container having an aperture adapted to receive said drive roll, record tape supporting and guiding means in said container including 17- means forming a loop around said tape drive roll, and tape engaging means embodying a pair of gripping elements operable to grip opposite faces of said tape at one side of said loop and to move said loop while the tape is so gripped out of or netic'record tape, the combination of a means supported on said machine for supporting and V guiding a record tape for longitudinal movement into peripheral driving engagement with said drive roll.
  • a motor unit embodying a housing, a drive motor in said'housing, a ro' tatable drive roll mounted on and projecting from one side of said housing, means driving .
  • a pair of gripping elements operable to grip'opposite faces of said tape at one side of said loop and to move said loop while the tape is so gripped out of or into peripheral driving engagement with said drive roll, said gripping elements being carin a predetermined path, a pair of translating magnets positioned on opposite sides of said tape moving in said predetermined path, a pawl and ratchet means for shifting said magnets transversely of said tape to successive positions across the tape whereby recordings may be made on diflerent non-overlapping longitudinally extending lanes of said tape, locking means for positively locking said magnets in each of said successive positions, and means for automatically unlocking and locking said locking means during initial and terminal portions of the movement of said pawl.
  • translating magnet unit embodying a pair of opposed separable translating magnets with projectingpole pieces supported on said frame
  • Atape guide means accurately positionable in a predetermined fixed operating position between said magnets embodying a pair of separable guide j plates extended longitudinally of the tape and ried one by an arm pivoted on said container and one carried by and longitudinally movable with respect to said arm.
  • a separable magazine unit comprising a container adapted for quick demountable attachment to said side of said housing, said container being adapted to receive said magnet unit when so attached to said housing, a tape gui 'e means supported in said container and receiva le between said separable magnets, said tape guide means embodying a pair of separable guide plates having a longi- 30 housing, a translating magnet unit embodying a formed with a longitudinal tape guide way therebetween which closely guides the edges of said tape, said guide plates being cut away opposite said pole pieces to permit contact of the polepieces with the tape, and said separable magnets being closeable on said guide plates.
  • said guide plates being apertured opposite said pole pieces of said magnets to permit contact of the pole pieces with the tape, and said separable magnets being closeable on said guide plates, supporting pins mounted in said container projecting at right angles to said guide plates through apertures therein which are elongated transversely of the tape guide way, springs on said pins en.- gaging one side of said plates, and abutment means on the other side of said plates engageable by said plates under the pressure of said spring when said magnets are separated, said abutment means supporting said plates in a position of clearance with reference to said pole pieces of said magnets when said magnets are separated.
  • a means supported on said machine for supporting and guiding a record tape for longitudinal movement in a predetermined path, a pair of translating magnets positioned on opposite sides of said tape moving in said predetermined path, step-by-step means for shifting said magnets transversely of said tape to successive positions across the tape whereby recordings may be made on dverent. non-overlapping longitudinally extending lanes of said tape, locking means for positively locking said magnets in each of said successive positions, and means for automatically unlocking said locking means upon each actuation of said step-bystep means.
  • a frame means supported on said frame for guiding a tape in a predetermined path.
  • a pair of opposed translating magnets with projecting pole pieces positioned on opposite sides of said predetermined path of said tape
  • means supported on said frame for shifting said magnets transversely across the tape
  • a tape guide means accuratelypositioned in a predetermined fixed operating position between said magnets embodying a pair of separable guide plates extended lon itudinally of the tape and formed with a longitudinal ta e guide way therebetween which closely guides the edges of the tape, said guide plates being apertured opposite said pole pieces to permit contact of the pole pieces with the tape throughout all transverse positions of the magnets.
  • a separable magazine unit for the record tape of a sound recording machine having a motor unit, a drive motor mounted thereon. and tape drive roll means adapted for peripheral engagement with the record tapemounted thereon and driven by said motor, that comprises: a
  • azine frame adapted for detachable connection with said motor unit.
  • a motor unit embodying a housing, a drive motor in said housing, a rotatable drive roll mounted on and projecting from one side of said housing, means driving said drive roll from said motor, and a separable magazine unit adapted for quick demountable attachment to said side of said housing, said magazine adapted to receive said drive roll, and record tape supporting and guiding means in said magazine including movable tape gripping means engageable with opposite faces of the tape for gripping a portion of said tape and moving it into peripheral driving engagement withsaid drive roll or backing it oi! therefrom.
  • said tape gripping means embodies a pair of gripping elements operable to grip opposite faces of the tape at a point spaced from said drive roll while said tape is in engagement with said drive roll and to move the gripped portion of the tape in a direction to back the tape out of engagement with said drive roll.
  • a recording machine employing a magnetic record tape
  • a main housing a translating magnet unit embodying a pair of separable translating magnets supported on and projecting from one side of said housing
  • a separable magazine unit adapted for quick demountable attachment to said side of said housing
  • means in said magazine for guiding a record tape therein between said two magnets
  • locking means on said magazine operable to positively lock said magazine to said housing after it has been attached thereto
  • means for closing said magnets on said tape by virtue of locking operation of said locking means and for separating said magnets by virtue of unlocking operation of said locking means.
  • a motor unit embodying a housing, a drive motor in said housing, a rotatable drive roll mounted on and projecting from one side of said housing, means driving said drive roll from said motor, a translating magnet unit embodying a pair of separable translating magnets supported on and projecting from said side of said housing, a separable magazine adapted for quick demountable attachment to said side of said housing, means in said magazine for guiding a record tape therein past said tape drive roll and between said pair of magnets, and unitary magnet operating and tape moving means operable only after said magazine is attached to'isaid housing to close said magnets on said tape and to move said tape into a position of peripheral driving engagement with said tape drive roll, and also operable to separate said magnets and to back said tape of! said driving roll preparatory to removal of said magazine from said housing.
  • a motor unit embodying a housing, a drive motor in said housing, a rotatable drive roll mounted on and projecting from one side of said housing, means driving said drive roll from said motor, a translating magnet unit embodying a pair of separable translating magnets supported on and projecting from said side of said housing, a separable magazine adapted for quick demountable attachment to said side of said housing, means in said magazine for guiding a record tape therein past said tape drive roll and between said pair of magnets, locking means for locking said magazine to said housing aiter the magazine is attached thereto, and meansoperable in conjunction with said locking means for supporting said tape in peripheral contact with said drive roll and for closing said separable magnets on said tape only while said magazine is locked to said housing by said locking means.
  • a recording machine employing a magnetic record tape
  • a main housing a translating magnet unit embodying a pair of opposed translating magnets with projecting pole pieces supported on and projecting from one side of said housing, a separable magazine adapted for quick demountable attachment to said side of said housing, a tape guide means supported by said magazine and receivable between said magnets, said tape guide means embodying a pair of separable guide plates having a longitudinal tape guide way formed therebetween, said guide plates being apertured opposite said pole pieces or said magnets to permit contact of the pole pieces with opposite faces of the tape, and said pole pieces being arranged for relative movement toward and from said apertured guide plates to permit insertion into and withdrawal from said apertured guide plates.
  • a recording machine employing a magnetic record tape
  • a main housing a translating magnet unit embodying a pair of opposed separable translating magnets supported on and projecting from one side of said housing, a separable magazine adapted for quick demountable attachment to said side or said housing, a tape guide means floatingly supported on said magazine, fixed abutment means on said main housing engaged by the bottom edge of said tape guide means, and spring means on said magazine acting downwardly on said tape guide means to assure accurate positioning thereof against said abutmentmeans.
  • a means supported on said machine for supporting and guiding a record tape for longitudinal movement in a predetermined path, a pair of translating magnets positioned on opposite sides of said tape moving in said predetermined path, step-by-step means for shifting said magnets transversely of said tape to successive positions across the tape whereby recordings may be made on different non-overlapping longitudinally extending lanes of said tape, and locking means for positively locking said magnets in each of said successive positions
  • said step-by-step means including a ratchet wheel, a pawl for operating said ratchet wheel, a cam operable by said ratchet wheel, and a cam follower for moving said magnets, said cam operating'to move said cam follower during an intermediate portion of each movement of said cam, and said locking means operating in consonance with said pawl to move to unlocking and locking positions during the initial and terminal portions of each driving stroke of said pawl.
  • a recording and reproducing machine employing a record tape, including a motor unit embodying a main housing and a drive motor and driving gear powered thereby in said main housing, a separable magazine for record tape adapted for quick demountable attachment to said housing, a pair of translating magnets mounted on said housing to be received in said magazine when said magazine is mounted on said housing, said magazine including means for supporting a record tape therewithin for travel between said translating magnets, tape drive roll means powered by said driving gear and adapted to operate within said magazine to drive said tape past said translating magnets, said magazine also including tape guide means for guiding the tape between said translating magnets, said tape guide means being floatingly mounted in said magazine, and fixed abutment means on said housing engaged by said tape guide means when the magazine is mounted on the housing to accurately position the tape guide means relative to the translating magnets.
  • said tape guide means comprises a pair of guide plates formed therebetween with a longitudinal guideway for the tape and receivable between the magnets, spring means engaging said guide means to position it against said abutment means, projecting spring-urged pole pieces included in said magnets adapted to bear on opposite sides or the tape, said guide plates being apertured opposite said pole pieces to permit engagement of the pole pieces with the tape, and said pole pieces being retractable to permit insertion or removal of the guide plates to or from their position between the magnets.

Landscapes

  • Transmission Devices (AREA)
  • Automatic Tape Cassette Changers (AREA)
US608734A 1945-08-03 1945-08-03 Magazine type magnetic recorder with multiple lane tape and traversing transducer Expired - Lifetime US2468198A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
BE467579D BE467579A (sv) 1945-08-03
US608734A US2468198A (en) 1945-08-03 1945-08-03 Magazine type magnetic recorder with multiple lane tape and traversing transducer
GB22168/46A GB615116A (en) 1945-08-03 1946-07-25 Improvements in or relating to separable magazine for the record tape of sound recording and/or reproducing machines, and the improved recording and/or record-reproducing machine including the improved separable magazine
CH268583D CH268583A (de) 1945-08-03 1946-08-02 Magnettonband-Aufnahme- und Wiedergabeapparat.
FR931769D FR931769A (fr) 1945-08-03 1946-08-02 Machines perfectionnées à reproduire et/ou enregistrer le son avec magasins amovibles pour le ruban enregistreur du son

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US608734A US2468198A (en) 1945-08-03 1945-08-03 Magazine type magnetic recorder with multiple lane tape and traversing transducer

Publications (1)

Publication Number Publication Date
US2468198A true US2468198A (en) 1949-04-26

Family

ID=24437762

Family Applications (1)

Application Number Title Priority Date Filing Date
US608734A Expired - Lifetime US2468198A (en) 1945-08-03 1945-08-03 Magazine type magnetic recorder with multiple lane tape and traversing transducer

Country Status (5)

Country Link
US (1) US2468198A (sv)
BE (1) BE467579A (sv)
CH (1) CH268583A (sv)
FR (1) FR931769A (sv)
GB (1) GB615116A (sv)

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US2609457A (en) * 1949-03-16 1952-09-02 Thurm Leon Electromagnetic sound recorder and reproducer
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US3470327A (en) * 1963-12-31 1969-09-30 Television Res Ltd Magnetic transducer track changing apparatus
US3471653A (en) * 1965-03-24 1969-10-07 Teruo Kawata Transversely shiftable tape support for enabling multi-track recording or readout
US3477725A (en) * 1966-08-22 1969-11-11 Radio Mfg Co Inc Recording track indicating wheel for magnetic tape cartridge player
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US3583708A (en) * 1966-02-08 1971-06-08 Jay H Prager Automatic tape track selector
US3604847A (en) * 1968-02-14 1971-09-14 Arvin Ind Inc Multitrack magnetic recording system
US3647989A (en) * 1969-11-10 1972-03-07 Ampex Control circuit for a bidirectional recorder
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Cited By (66)

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Publication number Priority date Publication date Assignee Title
US2633362A (en) * 1946-12-31 1953-03-31 Armour Res Found Magnetic record player
US2676766A (en) * 1947-01-04 1954-04-27 Heller Removable magazine for tape
US2637561A (en) * 1947-02-08 1953-05-05 Lawrence H Connell Method and means of magnetic recording and reproducing sound
US2598716A (en) * 1947-04-16 1952-06-03 Daystrom Electric Corp Magazine for magnetic wire recorders
US2668059A (en) * 1947-04-26 1954-02-02 Int Electronics Co Equipment for use with multitrack magnetic tape records
US2694110A (en) * 1947-06-27 1954-11-09 Int Electronics Co Equipment for use with magnetic tape records
US2686845A (en) * 1948-02-28 1954-08-17 Int Electronics Co Equipment for use with elongated magnetic records
US2560254A (en) * 1948-03-26 1951-07-10 Rca Corp Device for separating the magnetic transducer and record member during rewind
US2658951A (en) * 1948-10-30 1953-11-10 Rca Corp Magnetic sound system
US2609457A (en) * 1949-03-16 1952-09-02 Thurm Leon Electromagnetic sound recorder and reproducer
US2676022A (en) * 1949-03-17 1954-04-20 Ernest G Van Leeuwen Magnetic recording
US2650830A (en) * 1949-05-19 1953-09-01 John T Potter Electronic memory device
US2620404A (en) * 1949-07-07 1952-12-02 Int Electronics Co Driving and scanning mechanism for magnetic tape handling equipment
US2713618A (en) * 1949-12-07 1955-07-19 Louis A Mcnabb Pocket recorder
US2637560A (en) * 1949-12-20 1953-05-05 Powell Announcer Corp Sound reproducing device using endless recording tapes
US2647752A (en) * 1950-08-23 1953-08-04 Gen Electric Drive mechanism
US2680025A (en) * 1950-09-27 1954-06-01 J C Warren Corp Tape recorder and playback machine
US2703714A (en) * 1950-10-02 1955-03-08 Demby Magnetic sound recording and reproducing machine
US2776341A (en) * 1951-02-13 1957-01-01 Automatic Elect Lab Time announcing system
US2706638A (en) * 1951-03-27 1955-04-19 Henry H Bruderlin Automatic sound reproducing device
US2702834A (en) * 1951-04-20 1955-02-22 Loewe Opta Ag Driving mechanism for tape-shaped sound record carriers
US2857164A (en) * 1951-08-01 1958-10-21 Armour Res Found Magnetic recorder
US2933319A (en) * 1953-02-25 1960-04-19 Proctor Dictating Machine Corp Sound recording and reproducing apparatus
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Also Published As

Publication number Publication date
BE467579A (sv)
GB615116A (en) 1949-01-03
FR931769A (fr) 1948-03-03
CH268583A (de) 1950-05-31

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