US3916368A - Positive motion fader device - Google Patents

Positive motion fader device Download PDF

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Publication number
US3916368A
US3916368A US500665A US50066574A US3916368A US 3916368 A US3916368 A US 3916368A US 500665 A US500665 A US 500665A US 50066574 A US50066574 A US 50066574A US 3916368 A US3916368 A US 3916368A
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US
United States
Prior art keywords
elements
rotary
strip
wheels
periphery
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
US500665A
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English (en)
Inventor
Herman D Post
Sr George Alexandrovich
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.)
Robins Industries Corp
Original Assignee
Robins Industries Corp
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 Robins Industries Corp filed Critical Robins Industries Corp
Priority to US500665A priority Critical patent/US3916368A/en
Priority to JP50102239A priority patent/JPS5149655A/ja
Application granted granted Critical
Publication of US3916368A publication Critical patent/US3916368A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C10/00—Adjustable resistors
    • H01C10/14—Adjustable resistors adjustable by auxiliary driving means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y10T74/19023—Plural power paths to and/or from gearing
    • Y10T74/19074—Single drive plural driven
    • Y10T74/19079—Parallel
    • Y10T74/19102—Belt or chain

Definitions

  • a first flexible steel strip extends at one side of this plane and has its 0 osite end ortions convoluted in clock- [52] 338/130; 74/665 GE; 338/196 wise directiot n about the one and in counterclockwise hit. CI. direction about the other wheel, the ends of the strip [58] new of Search 338/119 being connected to these wheels.
  • a second similar 338/133 196; 116/124 R; strip is located at the other side of the plane and has 74/665 491 its opposite end portions convoluted in counterclockwise direction about the one and in clockwise direc- [56] References Clted tion about the other wheel; also having its ends con- UNITED STATES PATENTS nected to the wheels.
  • a slider is connected with one of 1,783,542 12/1930 Merle, srj; .1 338/131 h rip nd is gui ed in a slot so that, when it is 2,860,215 11/1958 Williams....
  • the present invention relates generally to a motiontransmitting mechanism, and more particularly to such a mechanism which is especially useful in controlling a fader for simultaneously varying the strength of two separate electrical signals.
  • the invention is applicable to uses other than with fader mechanisms which simultaneously vary the strength of two separate electrical signals, but will be described with reference to such a mechanism hereafter, for purposes of explanation.
  • Fader mechanisms are multiple-unit controls which are used, for example, in radio for gradual change-over from one microphone or audio channel to the other, in television for changing-over from one television camera to another, and in motion-picture projection for changing over from one projector to another.
  • Their function is, of course, to gradually decrease the strength of one signal, for example, one audio signal, while at the same time, equally gradually and to a concomitant extent increasing the strength of the second signal, for example in the second audio channel.
  • Devices of this type are widely used, especially in recording consoles and broadcasting studios but also in other applications.
  • a single control is used to effect the simultaneous decrease of one signal while effecting the simultaneous increase of the other signal.
  • Fader mechanisms usually use rotary potentiometers having rotary output shafts which must be turned in order to obtain an increase or a decrease-of the respective signal.
  • a pulley arrangement is provided utilizing pulleys on the respective shafts and an associated belt which is trained about the pulleys. This has the disadvantage that slippage may occur between the belt and the pulleys, so that a positive rotation of the two pulleys in unison is not always assured, meaning that the increase in the strength of one signal is not necessarily always precisely equal to the decrease in the other signal, and vice versa.
  • Another object. of the invention is to provide a fader mechanism having the characteristic just mentioned above.
  • An additional object of the invention is to provide such a fader mechanism which is inexpensive in conometer shaft, from approximately to approximately 270 or more.
  • the novel fader comprises a support, a pair of rotary elements mounted on the support for rotary motion about spaced parallel axes, and a pair of flexible strip elements.
  • These strip elements include a first flexible strip element extending between the rotary elements at one side of an axial plane encompassing both of the axes and having one of its end portions trained clockwise about the periphery of one and the other of its end portions trained counterclockwise about the periphery of the other of the rotary elements.
  • a second flexible strip element extends between the rotary elements at an opposite side of the axial plane and has one of its end portions trained counterclockwise about the periphery of the one and the other of its end portions trained clockwise about the periphery of the other rotary element.
  • Connecting means connects the ends of the flexible strip elements to the respective peripheries.
  • Operating means is connected with one of the elements for imparting motion to the same and thereby to all of the other elements.
  • FIG. 1 is an elevation illustrating an embodiment of the invention.
  • FIG. 2 is a section taken on line IIII of FIG. 1.
  • Reference numeral 1 identifies a support in front of a metal chassis which in the illustrated embodiment is of U-shaped configuration, having a transverse wall 2 and a pair of side walls 3, one of which is formed with a longitudinally extending slot 4.
  • rotary potentiometers P mounted on the wall 2 so as to be stationary are two rotary potentiometers P (one shown in FIG. 2), that is potentiometers which are very well known in the art and which have a rotary output shaft that, depending upon the direction in which it turns, causes an increase or a decrease in the electrical signal passing through the respective potentiometer.
  • the rotary shaft S each carry a wheel 5, 6.
  • These wheels in the illustrated embodiment are made of synthetic plastic material, for instance nylon or the like, and have hubs into which the shafts S extend. Screws 5a, 6a or analogous devices serve to rigidly secure the wheels 5, 6 on the respective shafts S for rotation with the same.
  • a first elongated strip element 7 is provided, located at one side ofan axial plane passing through the axis of rotation of both of the shafts S and hence of the wheels 5, 6.
  • the opposite end portions of the strip element 7 are trained about the peripheries of wheels 5, 6;-specifically, the in FIG. 1 left-hand end portion is trained in counterclockwise direction about the wheel 5, whereas the right-hand end portion is trained in clockwise direction about the periphery of the wheel 6.
  • the free ends of the element 7 are connected to the peripheries 'of the wheels 5, 6 by means of screws 11 and 12, respectively. Other connecting means could also be used.
  • a second strip element 8 is located at the opposite side of the aforementioned axial plane and also has its end portions trained about peripheries of the wheels 5, 6.
  • the in FIG. 1 left-hand end portion is trained in clockwise direction about the periphery of the wheel 5, and the right-hand end portion is trained in counterclockwise direction about the periphery of the wheel 6.
  • the end portions of the strip elements 7, 8 are trained about the periphery in mutually opposite directions.
  • the free ends of the strip element 8 are connected to the peripheries of the wheels 5, 6 by means of screws or analogous connecting elements 13, 14.
  • a bracket is mounted on the wall 2 and a slider 9 having a portion which extends out from the slot 4 is firmly connected with one of the strip elements, in this case the strip element 7.
  • the slider 9 may be injectionmolded onto the strip element 7 or could be secured thereto by means of a rivet, screw or any other suitable means.
  • the slider 9 may be plastic, or another material can be utilized.
  • the configuration of the wheels 5, 6 could be different from that which is illustrated; they could be of solid cylindrical configuration or, as is the case in the present instance, they could be of hollow substantially cupshaped cylindrical configuration, to mention just two possibilities.
  • the purpose of the bracket 10 is to serve as a backup for the slider 9 so that the latter cannot be pushed inwardly of the slot 4.
  • potentiometers No attempt has been made to show electrical circuitry associated with the potentiometers, because faders using potentiometers are very well known, including those using potentiometers having rotary shafts, and in any case the invention resides in the motion transmission between the slider and the wheels 5, 6, and not in the electrical circuitry.
  • the strip elements 8 could be made of a material other than strips of spring steel, for instance nylon tapes or the like. It is one further advantage of the present invention that the potentiometers that are used can be of the type that is completely moisture-proof, and that all of the other components of the device as illustrated in FIGS. 1 and 2, and are not affected by moisture.
  • a fader device a fader for simultaneously varying the strength of two separate electrical signals, comprising a support; a pair of rotary potentiometer elements mounted on said support for rotary motion about spaced parallel axes; a pair of flexible strip elements, including a first flexible strip element extending between said rotary elements at one side of an axial plane encompassing both of said axes, and having one of its end portions trained clockwise about the periphery of one and the other of its end portions trained counterclockwise about the periphery of the other of said rotary elements, and a second flexible strip element extending between said rotary elements at an opposite side of said axial plane and having one of its end portions trained counterclockwise about the periphery of said one and the other of its end portions trained clockwise about the periphery of said other rotary element; connecting means connecting the ends of said flexible strip elements to the respective peripheries; and operating means connected with one of said elements for imparting motion to the same and thereby to all of the other elements.
  • said operating means comprises an operating member connected with one of said strip elements for imparting to the same a linear motion which becomes converted into equal uni-directional rotary motions of said rotary elements.
  • said support has a wall formed with a slot extending longitudinally of said one strip element intermediate said rotary elements; and wherein said operating member is fixedly connected with said one strip element and includes an engaging portion extending through said slot and movable lengthwise of the same.
  • strip members are strips of spring steel.
  • said connecting means comprises screws.
  • each of said elements comprises a potentiometer stationarily mounted on said support and having a rotary output shaft, and a wheel mounted on and rotatable with said output shaft and having said periphery.
  • said wheels are of synthetic plastic material.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Control Of Amplification And Gain Control (AREA)
US500665A 1974-08-26 1974-08-26 Positive motion fader device Expired - Lifetime US3916368A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US500665A US3916368A (en) 1974-08-26 1974-08-26 Positive motion fader device
JP50102239A JPS5149655A (en) 1974-08-26 1975-08-25 Fueedaasochi

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US500665A US3916368A (en) 1974-08-26 1974-08-26 Positive motion fader device

Publications (1)

Publication Number Publication Date
US3916368A true US3916368A (en) 1975-10-28

Family

ID=23990412

Family Applications (1)

Application Number Title Priority Date Filing Date
US500665A Expired - Lifetime US3916368A (en) 1974-08-26 1974-08-26 Positive motion fader device

Country Status (2)

Country Link
US (1) US3916368A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS5149655A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4401968A (en) * 1979-08-09 1983-08-30 Shs Research Labs Inc. Manual belt electro-optical control
US4672355A (en) * 1980-12-31 1987-06-09 Shs Research Labs, Inc. Manual belt control device
US4734918A (en) * 1983-05-17 1988-03-29 Preh Elektrofeinmechanische Werke Jakob Preh Nachf. Gmbh & Co. Luminous band display device
US20050118011A1 (en) * 1999-01-20 2005-06-02 Magline, Inc. Transport cart system and method of its manufacture and operation

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1783542A (en) * 1928-08-24 1930-12-02 Sr George Merle Voltage controlling and regulating device
US2860215A (en) * 1955-04-15 1958-11-11 B & H Instr Company Inc Adjustable resistance device
US3185949A (en) * 1961-01-24 1965-05-25 Jordan Controls Inc Coded control plate reader with plural signal actuated means
US3266326A (en) * 1965-01-04 1966-08-16 Gen Electric Master control assembly for an audio volume control system
US3390366A (en) * 1966-08-12 1968-06-25 Century Lighting Inc Gang of variable resistance devices with removable board carrying settable taps
US3568113A (en) * 1968-02-22 1971-03-02 Hopt Kg R & E Visual indication means for a pushbutton tuner

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1783542A (en) * 1928-08-24 1930-12-02 Sr George Merle Voltage controlling and regulating device
US2860215A (en) * 1955-04-15 1958-11-11 B & H Instr Company Inc Adjustable resistance device
US3185949A (en) * 1961-01-24 1965-05-25 Jordan Controls Inc Coded control plate reader with plural signal actuated means
US3266326A (en) * 1965-01-04 1966-08-16 Gen Electric Master control assembly for an audio volume control system
US3390366A (en) * 1966-08-12 1968-06-25 Century Lighting Inc Gang of variable resistance devices with removable board carrying settable taps
US3568113A (en) * 1968-02-22 1971-03-02 Hopt Kg R & E Visual indication means for a pushbutton tuner

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4401968A (en) * 1979-08-09 1983-08-30 Shs Research Labs Inc. Manual belt electro-optical control
US4672355A (en) * 1980-12-31 1987-06-09 Shs Research Labs, Inc. Manual belt control device
US4734918A (en) * 1983-05-17 1988-03-29 Preh Elektrofeinmechanische Werke Jakob Preh Nachf. Gmbh & Co. Luminous band display device
US20050118011A1 (en) * 1999-01-20 2005-06-02 Magline, Inc. Transport cart system and method of its manufacture and operation

Also Published As

Publication number Publication date
JPS5149655A (en) 1976-04-30

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