US3445075A - Cooperative brake and driving device for a recording machine - Google Patents

Cooperative brake and driving device for a recording machine Download PDF

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Publication number
US3445075A
US3445075A US553880A US3445075DA US3445075A US 3445075 A US3445075 A US 3445075A US 553880 A US553880 A US 553880A US 3445075D A US3445075D A US 3445075DA US 3445075 A US3445075 A US 3445075A
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US
United States
Prior art keywords
motor
brake
winding
driving device
plates
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
US553880A
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English (en)
Inventor
Richard Siegemund
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.)
DEWEK VEREINIGTE DEUTSCHE ELECTRONIC-WERKE GmbH
Original Assignee
Dual Gebruder Steidinger GmbH and Co
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 Dual Gebruder Steidinger GmbH and Co filed Critical Dual Gebruder Steidinger GmbH and Co
Application granted granted Critical
Publication of US3445075A publication Critical patent/US3445075A/en
Assigned to DEWEK VEREINIGTE DEUTSCHE ELECTRONIC-WERKE GMBH reassignment DEWEK VEREINIGTE DEUTSCHE ELECTRONIC-WERKE GMBH ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: DUAL GEBRUDER STEIDINGER GMBH U. CO. 1.K,
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
    • 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
    • G11B15/26—Driving record carriers by members acting directly or indirectly thereon
    • 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
    • G11B15/46—Controlling, regulating, or indicating speed
    • G11B15/48—Starting; Accelerating; Decelerating; Arrangements preventing malfunction during drive change

Definitions

  • a setting means including an operating member is provided for pivoting the motor into driving engagement and includes an elastic means yielding connected between the motor and the operating member for pivoting and retaining the motor in driving engagement against one of the winding plates
  • Brake means are pro vided engaging each of the winding plates respectively, which are adapted to have a stronger effect than that of the friction clutch, and the brake means and the setting means are operatively connected for releasing the brake, when the setting means is actuated.
  • the present invention relates to a driving device for a magnetophone with a rewindable recording carrier and a motor, which is connectable by means of a slip clutch to the prevailing winding spool plate which can be controlled by a controllable brake device.
  • the joining force of the slip clutch is measured such, that during the start, the tensile strain created in the recording carrier, due to the mass inertia of the unwinding spool, does not surpass this predetermined measure.
  • the brakes on [the windingand unwinding-spoolplate serve the purpose to destroy the moving energy contained in the recording carrier and the spool plates, respectively, upon stopping of the drive, in order that the moving energy cannot lead to a loop formation or non-tolerable pulling tensions in the recording carrier.
  • This known device suffers by the basic drawback, that the finding of a predetermined position of a listening occurrence is thereby not possible, because the rewinding acceleration of the recording carrier is too great. If the slip coupling is set weakly correspondingly, the starting time is too long during a fast rewinding.
  • a driving device which causes the joining of the winding spool such, that a belt engaging the spool plate is pressable increasingly towards the spool plate.
  • different accelerations could be obtained by corresponding control of the engaging pressure.
  • the actual driving element cannot be arranged as its optimum for the plain driving conditions, since it has to be effective simultaneously as a slip clutch.
  • a corresponding arrangement with friction wheels would suffer of the same drawbacks.
  • FIGURE 1 is a top plan view of a sound tape device, shown schematically.
  • FIG. 2 is a fragmentary elevation of the device disclosed in FIG. 1.
  • the device designed in accordance with the present invention, comprises two winding plates 1 and 2 and a motor 3 is mounted between the winding plates 1 and 2 for a tipping movement about two axles 4.
  • the motor 3 has a shaft 6 and a disk 7 is rigidly secured on the shaft 6.
  • a friction disk 8, which is rotatably mounted on the shaft 6, is urged towards the disk 7 having an intermediate friction layer 10 by means of a pretensioned spring 9.
  • a spiral spring 5 is secured to one of the axles 4, the free end of the spiral spring 5 being connected with an operating rod 11.
  • the motor 3 is selectively coupled directly with the winding plate 2 or by means of an intermediate wheel 12 with the winding plate 1, the motor 3 swinging about its axis 4 into the respective coupling positions.
  • the winding plates 1 and 2 are surrounded by band brakes 13 and 14, respectively, which is connected at its free end with one arm of double-armed, angular levers 15 and 16, respectively.
  • the other arm of the doublearmed lever 15 and 16, respectively is connected on the one hand, with springs 17 and 18, respectively, and, on the other hand, is controllable by a recording carrier 21 by means of pins 19 and 20, respectively.
  • the doublearmed levers 15 and 16, respectively is connected on the more pretensioned spring arms 22 and 23, respectively, which engages control cams 24 and 25, respectively, of a displaceable rod 26.
  • the sum of the spring forces 17, 22 and 18, 23, respectively, is of such measured value, that the spring forces exert, in the shown resting position of the device, a greater force upon the winding plates 1 and 2, than that of the friction moment between the disks 7 and 8 upon the motor shaft 6, when the friction disk 8 is coupled to one of the winding plates 1 or 2 by operation of a lever 27,
  • This band pull is insufiicient, however, in order to release the effect of the spring 23.
  • the spring 23 loosens increasingly its tension, by sliding on the inclined face 28 of the control cam 25. Slowly the point is reached, at which the driving moment exerted by the motor shaft 6 becomes greater than the brake moment exerted by the brake bands 13 and 14.
  • the recording carrier 21 is set thus into motion at first with a very small acceleration force, in case the lever 27 is not moved immediately to a complete release of tension of the spring 23.
  • a driving device for a magnetophone with a rewindable recording carrier comprising two winding plates disposed spaced apart from each other and having parallel axes of rotation,
  • a motor having a shaft and being swingably mounted for selective movement to operatively drive either one of said winding plates
  • a friction clutch including a second disc cooperatively disposed between said first disc and said motor shaft,
  • said first disc being selectively movable with said motor into operative driving engagement with either said intermediate wheel or the other of said winding plates to correspondingly drive the selected winding plate
  • said setting means including an operating member and an intermediate elastic means yieldingly connected b tween said operating member and said motor for swinging and holding said motor in position to drive one of said winding plates upon selective actuation of said operating member from a neutral non-driving position to a selected winding plate driving position,
  • said brake means adapted to have a stronger effect than that of said friction clutch.
  • the driving device as set forth in claim 1, further comprising connecting means operatively connecting said setting means and said brake means for cooperative actuation of said brake means and said setting means together.
  • a band brake at least partially encircling each of said winding plates, respectively, and having one end thereof immovably secured
  • both of said winding plates adapted to have wound thereabout a recording carrier slidingly disposed against both of said lever means, tending to pivot the latter in a direction so as to loosen said band brakes when said recording carrier is taut, and
  • said spring biasing means of sufiicient strength for braking the corresponding of said winding plates via said hand brake when said recording carrier is not taut against a driving engagement force of said first disc.
  • a displaceable rod operatively connected with said operating member of said setting means and including two cam means each positioned on said displaceable rod in sliding abutting relationship relative to said pre-tension means of said lever means, respectively,
  • each of said cam means adapted to cooperate abuttingly with said corresponding pre-tension means to prevent said recording carrier from pivoting the corresponding lever means to loosen the corresponding band brake
  • said displaceable rod adapted to be displaced upon movement of said operating member so as to move said cam means out of abutting cooperation with at least one of said corresponding pre-tension means.
  • cam means each includes a peak, a sharp slope on one side thereof, and on the other side thereof a gradual slope, respectively,
  • both cam means being disposed relative to one another in mirror image symmetry and spaced from one another in a neutral position abutting thereof with both of said peaks both of said pre-tensioning springs, simultaneously, and
  • said brake means is simultaneously adapted as a manually operating starting control and setting correction means.
  • a driving device for a magnetophone with a rewindable recording carrier comprising two winding plates disposed spaced apart from each other and having parallel axes of rotation,
  • a motor having a shaft and being swingably mounted for selective movement to operatively drive either one of said winding plates
  • a friction clutch including a second disc cooperatively disposed between said first disc and said motor shaft,
  • said first disc being selectively movable with said motor into operative driving engagement with either said intermediate wheel or the other of said winding plates to correspondingly drive the selected winding plate
  • said setting means including an operating member and 1 789 607 1/1931 Steurer an elastic means yieldingly connected between said 2526783 10/1950 Toogoo'd Warming member and Said mow! Swinging and 5 31076161 8 2/1963 Van Hook 24275.4 2 retaining said motor in position to drive one of said 3,091,410 5 /1963 Widener 242 55.12 winding plates upon selective actuation of said 3,093,335 6/ 1963 Lane 24255.12 ting means swinging said motor by said operating 3,133,710 5/ 1964 Herterich 242-55.12

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  • Braking Arrangements (AREA)
US553880A 1965-06-01 1966-05-31 Cooperative brake and driving device for a recording machine Expired - Lifetime US3445075A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEST23913A DE1217094B (de) 1965-06-01 1965-06-01 Antriebseinrichtung fuer Magnettongeraet mit umspulbarem Aufzeichnungstraeger

Publications (1)

Publication Number Publication Date
US3445075A true US3445075A (en) 1969-05-20

Family

ID=7459896

Family Applications (1)

Application Number Title Priority Date Filing Date
US553880A Expired - Lifetime US3445075A (en) 1965-06-01 1966-05-31 Cooperative brake and driving device for a recording machine

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US (1) US3445075A (de)
DE (1) DE1217094B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3677496A (en) * 1969-04-16 1972-07-18 Int Standard Electric Corp Tape tension checking device for cassette recorders
WO1981003075A1 (en) * 1980-04-18 1981-10-29 J Headley Optical rollfiche reader

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1789607A (en) * 1930-01-04 1931-01-20 John H Steurer Photo-electric sound-transforming device
US2526783A (en) * 1945-08-06 1950-10-24 Seeburg J P Corp Wind and rewind machine for magnetic recording media
US3076618A (en) * 1959-06-30 1963-02-05 Charles F Van Hook Wound material tensioning device
US3091410A (en) * 1961-03-01 1963-05-28 Ampex Tape tensioning device
US3093335A (en) * 1958-11-21 1963-06-11 Bsr Ltd Tape recording and reproducing apparatus
US3133710A (en) * 1961-06-13 1964-05-19 Herterich Walter Magnetic recorder

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1789607A (en) * 1930-01-04 1931-01-20 John H Steurer Photo-electric sound-transforming device
US2526783A (en) * 1945-08-06 1950-10-24 Seeburg J P Corp Wind and rewind machine for magnetic recording media
US3093335A (en) * 1958-11-21 1963-06-11 Bsr Ltd Tape recording and reproducing apparatus
US3076618A (en) * 1959-06-30 1963-02-05 Charles F Van Hook Wound material tensioning device
US3091410A (en) * 1961-03-01 1963-05-28 Ampex Tape tensioning device
US3133710A (en) * 1961-06-13 1964-05-19 Herterich Walter Magnetic recorder

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3677496A (en) * 1969-04-16 1972-07-18 Int Standard Electric Corp Tape tension checking device for cassette recorders
WO1981003075A1 (en) * 1980-04-18 1981-10-29 J Headley Optical rollfiche reader

Also Published As

Publication number Publication date
DE1217094B (de) 1966-05-18

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Legal Events

Date Code Title Description
AS Assignment

Owner name: DEWEK VEREINIGTE DEUTSCHE ELECTRONIC-WERKE GMBH, 7

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:DUAL GEBRUDER STEIDINGER GMBH U. CO. 1.K,;REEL/FRAME:004356/0863

Effective date: 19841212