US3772630A - Variable potentiometer - Google Patents

Variable potentiometer Download PDF

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Publication number
US3772630A
US3772630A US00173993A US3772630DA US3772630A US 3772630 A US3772630 A US 3772630A US 00173993 A US00173993 A US 00173993A US 3772630D A US3772630D A US 3772630DA US 3772630 A US3772630 A US 3772630A
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United States
Prior art keywords
collector
slider
potentiometer
base
annular portion
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
US00173993A
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English (en)
Inventor
E Falco
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Individual
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Individual
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Publication date
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Publication of US3772630A publication Critical patent/US3772630A/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
    • H01C10/30—Adjustable resistors the contact sliding along resistive element
    • H01C10/32—Adjustable resistors the contact sliding along resistive element the contact moving in an arcuate path
    • H01C10/34—Adjustable resistors the contact sliding along resistive element the contact moving in an arcuate path the contact or the associated conducting structure riding on collector formed as a ring or portion thereof

Definitions

  • a variable potentiometer comprising a base of insulating material, a resistive track mounted on the base, a collector having an annular'portion, a connecting tag electrically connected. to the collector. and fixed: to the base, a. slider, a stud carried bythe slider'and contacting the resistive. track, and two further connectingztags electrically connected to respective ends of said track, said slider: being rotatably mounted on said. annular portion of the collector, the axis of which. annular portion acts as the axis of rotation of the slider;
  • the potentiometer is made in. three parts, a slot? is provided. in the slider, to. accommodate the end of a screwdriver, which, at the endsof itstravel, comes up against stop faces on opposite sides. of the collector. This arrangement enables. any strain on the slider to be avoided.
  • the collector and the three connecting tags may be made in one piece, the. twoendi tags are separatedfrom the collector by the provision of cutouts after assembly, on the same side of the. equipment. as the. crimping of theeyelets, which makes for rapid assembly without needless manipulation of the equipment.
  • FIG. 1 is a perspective view of one form of variable potentiometer with. an uninsulated. control means
  • FIG. 2. is a plan of the potentiometer shown in FIG.
  • FIG. 3 is a sectional. view of the potentiometer, taken along the line III-IIL in FIG. 2; 1
  • FIG. 4 isa sectional. view ofan embodimentof potentiometer in accordance with the invention equipped with an insulated control knob;
  • FIG. 5 is a. plan,.partly insection, of the potentiometer at the plane of the line V-V in FIG. 4;
  • FIG. 6 is a longitudinal. section of a further embodiment of a potentiometer in' accordance. with the invention, a slider thereof being in position for adjustment;
  • FIG. 7 is a similar'sectional view of the potentiometer of FIG. 6, with the slider in the. locked position;
  • FIG. 8. is a perspective viewof the potentiometer of FIGS. 6 and 7 as. seen from the side. opposite to the track;
  • FIG. 9 is a longitudinal section of a. still further embodiment.
  • FIGS. 1, 2 and 3 show an embodiment of a variable potentiometer with uninsulated control.
  • the potentiometer consisting of a base 1, made of insulating material, on. which. is printed. a resistive track 2, a collector'3, with its connecting tag 4, and a slider 5, fitted with a stud 6, for contact with the track 2, the two ends of which track. are joined to connecting tags 7 and 8, fixed. to the base. 1 by eyelets 9 and 10.
  • the slider 5 has a ring-shaped portion 11, by which it is rotatably mounted on an annular portion 12, of the collector 3, this portion l-2*having afrusto-conical face 13.
  • the annular portion 12 of the collector is fixed to the base 1 by a bent-over end portion 14, which is.
  • The. slider 5 hasa tongue 16, extending radially from the ring portion 11 and bearing the stud 6, which is in contact with. the resistive track.
  • this tongue 16 and in the ring portion 11 of the slider there is a slot 17, into which the end of a screwdriver blade can be inserted for moving the slider.
  • the screwdriver abuts against stop-faces l8 and. 18a on a bridge-piece 19, of the collector 3, so as to determine thev limit positions of the stud 6.
  • the collector 3 comprising the annular portion 12, which is joined to the tag 4 by the bridge-piece 19, is secured to the base 1 by the bent-over end portion 14 of the portion 12 that it is shaped to form an eyelet, and by another eyelet 20, situated near the tag 4-.
  • the bridge-piece 19 in addition to its role as a stop, serves to stiffen the assembly, and the. eyelet 20 prevents the collector from beingrotated by the annular portion 12.
  • the collector 3 and the tags 4, 7 and 8 are stamped out. in a single piece; after assembly, the tags 7 and 8 are separated from the collector 3 by cutting away the portions 21 and 21a by means of two blades introduced through the rectangular openings 22 and 22a provided in the base 1.
  • insulated control means takes the form of a knob made of insulating material 23, and is rotatably mounted about a stem 24, within an aperture 25, in the annular portion 12 of the collector 3, to which it is secured by its expanded end, which bears against the bent-over end portion 14 of the portion 12 of the collector.
  • the circumference of the control knob 23 carries serrations 26, while the centre of the knob is slotted at 27 to accommodate the end of a screwdriver.
  • the protruberances 28 and 28a also act as stops when they come up against the edges 29 andz29a of the collector 3.
  • a screw 30 Fitted into the aperture 25 in the portion 12 of the collector 3 is a screw 30, the head 31 of which abuts against the collector 3 and the screw-threaded shank 32 of which is engaged between two springy tabs 33 and 33a, cut out of a small plate 34, fixed to the base 1 on the side away from the slider, being anchored, for example, by means of the eyelet 20 by which the collector is held in place.
  • the tips 35 and 35a of the springy tabs 33 and 33a are set into turns of thread on the screw-threaded shank 32 of the screw.
  • the screw 30 is slack, so that its head 31 is exerting only slight pressure on the collector 3 and the slider 5 can rotate freely with low torque, enabling the slider to be adjusted and brought to a predetermined position.
  • the screwhead 31 presses on the bridge-piece 19, which flexes, and the frusto-conical face 13 thereupon presses against the ring portion 1 l of the slider, thereby increasing the slider torque.
  • the two springy tabs 33 and 33a enable crushing of the central ring portion 11 to be avoided, by virtue of the fact that, as the screw 30 advances, the tabs 33 and 33a rise, their tips 35 and 35a moving clear and dropping back on the preceding turn of the thread.
  • the screw 30 is disposed within the opening 25 in the central portion of the collector 3, the head 31 of which bears against the collector 3 and the screw-threaded shank 32 thereof is engaged in a screw-threaded hole 36, in a small, rigid, plate 34 fixed to the base on the face away from the slider.
  • the slider 5 is provided with a stamped collar 37, the edge 38 of which can come to bear against the base 1 when the screw 30 reaches the end of its tightening movement.
  • a variable potentiometer comprising a base of insulating material supporting a resistive track having connecting tags electrically connected to the respective ends thereof,
  • collector fixed to the base and having an annular portion including a frustoconical face, said collector being provided with a further electrical connecting tag
  • a slider rotatably mounted on the annular portion of the collector contacting the frustoconical face, said annular portion constituting an axis of rotation for the slider, said slider being compressed by the annular portion against said base and supporting a stud for contact with the resistive track.
  • said potentiometer includes a control knob having two protuberances on one face thereof, and I a stem mounting the knob and passing through the annular portion,
  • a variable potentiometer comprising a base of insulating material supporting a resistive track having connecting tags electrically connected to the respective ends thereof,
  • a collector fixed to the base and having an annular portion including a frustoconical face, said collector being provided with a further electrical connecting tag, said collector and the connecting tags being initially made in one piece and subsequently separated from the collector by a cutting out operation, the base of insulating material having two openings disposed one on each side of the tag of the collector, said openings enabling the other tags, one of which is disposed on each side of the collector tag, to be electrically separated from the collector, and
  • a slider rotatably mounted on the annular portion of the collector contacting the frustoconical face, said mounting arrangement on said collector constituting an axis of rotation for the slider, said slider being compressed by the annular portion against said base and supporting a stud for contact with the resistive track.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Adjustable Resistors (AREA)
US00173993A 1970-09-07 1971-08-23 Variable potentiometer Expired - Lifetime US3772630A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7032440A FR2105427A5 (ko) 1970-09-07 1970-09-07

Publications (1)

Publication Number Publication Date
US3772630A true US3772630A (en) 1973-11-13

Family

ID=9060968

Family Applications (1)

Application Number Title Priority Date Filing Date
US00173993A Expired - Lifetime US3772630A (en) 1970-09-07 1971-08-23 Variable potentiometer

Country Status (3)

Country Link
US (1) US3772630A (ko)
DE (1) DE2140751A1 (ko)
FR (1) FR2105427A5 (ko)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3921118A (en) * 1973-10-01 1975-11-18 Gen Electric Variable resistor assembly
US3947800A (en) * 1974-02-04 1976-03-30 Cts Corporation Variable resistance control
US3964011A (en) * 1974-03-18 1976-06-15 North American Philips Corporation Single turn variable resistance device having a split shaft rotor
US4041439A (en) * 1975-08-20 1977-08-09 Carrier Corporation Potentiometers
US4158831A (en) * 1975-12-19 1979-06-19 North American Philips Corporation Single turn potentiometer with helical coil spring wiper
FR2424615A1 (ko) * 1978-04-24 1979-11-23 Cts Corp
US4184140A (en) * 1978-12-14 1980-01-15 Allen Bradley Company Two-piece trimming potentiometer
US4433322A (en) * 1981-02-18 1984-02-21 Alps Electric Co., Ltd. Variable resistor
US5721526A (en) * 1995-07-20 1998-02-24 Hokuriku Electric Industry Co., Ltd. Compact high-voltage variable resistor
US5726625A (en) * 1994-12-28 1998-03-10 Hokuriku Electric Industry Co., Ltd. High-voltage variable resistor
US5886616A (en) * 1996-06-27 1999-03-23 Hokuriku Electric Industry Co., Ltd. High-voltage variable resistor unit

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1819246A (en) * 1929-03-28 1931-08-18 Lester L Jones Variable resistance unit
US2842647A (en) * 1954-03-18 1958-07-08 Globe Union Inc Adjusting means for resistance trimmers
US3032734A (en) * 1960-07-05 1962-05-01 Globe Union Inc Resistance trimmer knob
US3561113A (en) * 1969-01-30 1971-02-09 Eastman Kodak Co Method for making rheostats
US3585559A (en) * 1968-12-09 1971-06-15 Cts Corp Variable resistance control

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1819246A (en) * 1929-03-28 1931-08-18 Lester L Jones Variable resistance unit
US2842647A (en) * 1954-03-18 1958-07-08 Globe Union Inc Adjusting means for resistance trimmers
US3032734A (en) * 1960-07-05 1962-05-01 Globe Union Inc Resistance trimmer knob
US3585559A (en) * 1968-12-09 1971-06-15 Cts Corp Variable resistance control
US3561113A (en) * 1969-01-30 1971-02-09 Eastman Kodak Co Method for making rheostats

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3921118A (en) * 1973-10-01 1975-11-18 Gen Electric Variable resistor assembly
US3947800A (en) * 1974-02-04 1976-03-30 Cts Corporation Variable resistance control
US3964011A (en) * 1974-03-18 1976-06-15 North American Philips Corporation Single turn variable resistance device having a split shaft rotor
US4041439A (en) * 1975-08-20 1977-08-09 Carrier Corporation Potentiometers
US4158831A (en) * 1975-12-19 1979-06-19 North American Philips Corporation Single turn potentiometer with helical coil spring wiper
FR2424615A1 (ko) * 1978-04-24 1979-11-23 Cts Corp
US4184140A (en) * 1978-12-14 1980-01-15 Allen Bradley Company Two-piece trimming potentiometer
US4433322A (en) * 1981-02-18 1984-02-21 Alps Electric Co., Ltd. Variable resistor
US5726625A (en) * 1994-12-28 1998-03-10 Hokuriku Electric Industry Co., Ltd. High-voltage variable resistor
US5933070A (en) * 1994-12-28 1999-08-03 Hokuriku Electric Industry Co., Ltd. High-voltage variable resistor
US5721526A (en) * 1995-07-20 1998-02-24 Hokuriku Electric Industry Co., Ltd. Compact high-voltage variable resistor
US5886616A (en) * 1996-06-27 1999-03-23 Hokuriku Electric Industry Co., Ltd. High-voltage variable resistor unit

Also Published As

Publication number Publication date
FR2105427A5 (ko) 1972-04-28
DE2140751A1 (de) 1972-03-16

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