US3581023A - Improved wafer rotary switch with stator printed circuit contact structure and rotor - Google Patents

Improved wafer rotary switch with stator printed circuit contact structure and rotor Download PDF

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US3581023A
US3581023A US881201A US3581023DA US3581023A US 3581023 A US3581023 A US 3581023A US 881201 A US881201 A US 881201A US 3581023D A US3581023D A US 3581023DA US 3581023 A US3581023 A US 3581023A
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Prior art keywords
stator
rotor
opening
clips
switch
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US881201A
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Walter Meyer
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Oak Electro Netics Corp
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Oak Electro Netics Corp
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
    • H01R9/16—Fastening of connecting parts to base or case; Insulating connecting parts from base or case
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/58—Electric connections to or between contacts; Terminals
    • H01H1/5805—Connections to printed circuits
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
    • H01H19/54—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand the operating part having at least five or an unspecified number of operative positions
    • H01H19/56—Angularly-movable actuating part carrying contacts, e.g. drum switch
    • H01H19/58—Angularly-movable actuating part carrying contacts, e.g. drum switch having only axial contact pressure, e.g. disc switch, wafer switch
    • 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
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49105—Switch making

Definitions

  • the stator has spiral inductors for a tuner printed 1 e wees on one surface, with the beginning terminal of one inductor UNITED STATES PATENTS radially aligned with the ending terminal of the next and 2,789,212 4/ 1957 Achenbach et al. 200/ 1 1(D) joined by a stator contact.
  • This invention is concerned with a printed circuit switch particularly intended for switching inductors in a multiple frequency tuned circuit.
  • a rotary switch In a rotary switch it is command to have s stator section of a phenolic resin insulating sheet with a rotor opening in the center and on which wiper contacts are riveted.
  • the wiper contacts lie in radial slots extending outwardly from the rotor opening with their wiper surfaces aligned with one surface of the stator.
  • the rotor cont'a'ct blade lies flat against the surface of the stator around the rotor opening and is secured to a rotor body which has a bearing ring on the opposite surface of the stator. It is known to deposit printed circuitry directly on such switch stators. However, where size is important, as in a television tuner, the reduction of stator surface area because of the slots makes this construction undesirable.
  • the switch section of this invention eliminates the stator contact slots, providing maximum surface area for the printed circuitry.
  • a further feature is that the circuit includesspiral inductors with the beginning terminal of one inductor aligned with the end terminal of the adjacent and connected by a stator clip extending radially outwardly from the rotor opening.
  • FIG. 1 is an illustration of one face of the stator (before soldering), showing the circuitry thereon;
  • FIG. 2 is a view of the opposite face of the stator
  • FIG. 3 is an enlarged section through the rotor
  • FIG. 4 is an enlarged section through a stator clip
  • FIG. 6 is an enlarged, fragmentary view showing the mounting of a stator contact on the stator.
  • FIG. 7 is an enlarged section along line 7-7 of FIG. 2.
  • the switch section has a stator 10 and a rotor 11, 169 1 and 2.
  • Stator 10 is a phenolic or other insulating sheet material with a central rotor opening 13 and a pair of mounting tabs l4, 15 to be received in slots in the frame of a tuner (not shown).
  • the inductor sections are preferably printed circuitry deposited or etched in a suitable manner.
  • Inductor 16-2 has a spiral configuration starting at an inner terminal 16-2a and ending at an outer terminal 16-2b.
  • Each of the terminals is defined by a conductive area surrounding an opening in the stator which also receives mounting portions of the stator contacts, as will appear.
  • the numerical suffix for the radially aligned pairs of openings is determined by the relative position of the opening closest the rotor opening and representing the inner terminal of each of the spiral inductors.
  • the inner terminal l6-2a of inductor 16-2 is formed around opening 17-1 while the outer terminal 16-2b of the inductor is formed around opening 18-2.
  • This pattern is continued for inductors 16-3 through 16-6 of the low frequency portion of the VHF band.
  • Inductors 16-2 through 16-6 are connected in series by the stator contact clips, described below.
  • Inductors 16-7 through 16-13 do not have a spiral configuration and are connected between conductor 19 and terminals at openings 17-7 through 17-13. Only a portion of the inductor terminals and openings are numbered in FIGS. 1 and 2, to indicate the pattern of identification. Applying a reference numeral to each would unnecessarily complicate the drawing.
  • Stator clips 20-1 through 20-13 are mounted on the face l-b of the stator, surrounding the rotor opening 13.
  • Each of the stator clips has mounting portions extending into the appropriate mounting openings and, in the completed form of the switch section, are secured by solder, not shown in FIG. 2.
  • the stator clips have a pair of wiping contact surfaces 20a, 20b (FIG. 3) in a plane spaced from and parallel with the surface of the stator 10. This eliminates the need for slots extending outwardly from the rotor opening to receive the stator contact as in the usual switch section such as shown in Gelzer US. Pat. No. 2,954,469. The entire surface of the stator surrounding opening 13 is available for the printed circuitry.
  • Rotor 11 has a body 22 on which a rotor contact plate 23 is mounted.
  • the rotor body which may. be molded or plastic, has a boss portion 24 (FIG. 4) which is received in the rotor opening 13 of the stator.
  • a flange 25 extends outwardly beyond the rotor opening and bears against the surface of the stator.
  • the rotor contact blade 23 overlies the flange 25 and is positioned by the flange in the plane of the contact surfaces of the stator clips, spaced from the stator surface.
  • Rotor blade 23 has amounting legs 26 which extend through openings 27 in the flange and lie in grooves 28 in the surface of boss 24.
  • the ends 26a of legs 26 extend outwardly along the surface 10a of the stator, cooperating with flange 25 to secure the rotor in place.
  • a central opening 30 in the rotor receives a shaft (not shown) for turning the rotor with respect to the stator.
  • the rotor may have a resilient wall section which accommodates dimensional variations in accordance with US. Pat. No. 3,213,253.
  • the stator clips 20 are preferably a single length of suitable resilient contact material having (except clip 20-1) double wiping surfaces 20a, 20b fonned at the ends thereof.
  • the contact is folded at 20c and the folded portion is bent at. right angles to the plane of the contact forming a first mounting portion 20d.
  • a tang 202 extends from the contact parallel with mounting portion 20d, forming a second mounting portion intermediate the ends thereof.
  • Mounting portion 20d is received in one of the outer mounting openings 18 while tang 20e is received in one of the inner circle of mounting openings 17.
  • Tang 202 has a longitudinal stiffening rib 20f (FIG. 6), and is pressed into stator opening 17 with a force fit. The end of tang 20e is formed over upon insertion and engages the stator. The clip is thus held in position during assembly.
  • a printed circuitswitch comprising: a stator of sheet material with a rotor opening therein; circuitry printed on one face of said stator; stator switch clips mounted on the other face of the sheet and connected with said circuitry, the stator being unslotted and the switch clips each have a wiping surface spaced outwardly from the surface of said stator;
  • a rotor member of insulating material received in said rotor opening, having a flange extending radially outwardly beyond the rotor opening in the stator and bearing-against the surface thereof and a boss portion extending from the flange into the opening in the stator, with a plurality of holes in the flange and grooves in the peripheral surface of the boss, aligned with the holes;

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)

Abstract

A printed circuit rotary switch with stator clips soldered thereon and having wiping surfaces spaced from the surface of the switch section. The rotor blade is mounted on a flanged body, in alignment with the wiper contacts and has legs extending through the rotor opening securing the rotor to the stator. The stator has spiral inductors for a tuner printed on one surface, with the beginning terminal of one inductor radially aligned with the ending terminal of the next and joined by a stator contact.

Description

United States Patent [72] inventor Walter Meyer McI'Ienry, Ill. [21] Appl. No. 881,201 [22] Filed Dec. 1, 1969 [23] Division of Ser. No. 798,923, Feb. 13, 1969 [45] Patented May 25, 1971 [73] Assignee Oak Electro/Netics Corp.
[54] WAFER ROTARY SWITCH WITH STATOR PRINTED CIRCUIT CONTACT Primary ExaminerRobert K. Schaefer Assistant Examiner-J. R. Scott AttorneyI-iofgren, Wegner, Allen, Stellman & McCord STRUCTURE AND ROTOR 1 Claim, 7 Drawing Figs.
[52] [1.8. CI 200/11, ABSTRACT; A printed circuit rotary switch with stator clips ZOO/166, 29/622 soldered thereon and having wiping surfaces spaced from the [5 Int. surface of the witch ectio The rotor blade is mounted on a [50] Field Of Search ..200/ll (D), fl d bod in alignment with the wiper contacts and has 166 166 29/622 legs extending through the rotor opening securing the rotor to 56 R f the stator. The stator has spiral inductors for a tuner printed 1 e wees on one surface, with the beginning terminal of one inductor UNITED STATES PATENTS radially aligned with the ending terminal of the next and 2,789,212 4/ 1957 Achenbach et al. 200/ 1 1(D) joined by a stator contact.
20 7 20 I 13 l l l Li I ll I s P ll 25 242 26a 3 PATENTEU W25 |97l sum 1 or 2 PATENIED m 2 5 l57| SHEU 2 OF 2 WAFER ROTARY SWITCH WITH STATOR PRINTED CIRCUIT CONTACT STRUCTURE AND ROTOR This application is a division of Meyer application Ser. No. 798,923, filed Feb. 13, 1969, and assigned to the assignee of this invention.
This invention is concerned with a printed circuit switch particularly intended for switching inductors in a multiple frequency tuned circuit.
In a rotary switch it is command to have s stator section of a phenolic resin insulating sheet with a rotor opening in the center and on which wiper contacts are riveted. The wiper contacts lie in radial slots extending outwardly from the rotor opening with their wiper surfaces aligned with one surface of the stator. The rotor cont'a'ct blade lies flat against the surface of the stator around the rotor opening and is secured to a rotor body which has a bearing ring on the opposite surface of the stator. It is known to deposit printed circuitry directly on such switch stators. However, where size is important, as in a television tuner, the reduction of stator surface area because of the slots makes this construction undesirable.
The switch section of this invention eliminates the stator contact slots, providing maximum surface area for the printed circuitry.
One feature of the invention is that the wiper contacts are mounted on the surface of the stator with the wiping surfaces spaced from the stator surface. No slot is required, and. the rotor blade is spaced from the stator surface to engage the wiper clips.
Another feature is that the circuitry is printed on one surface of the stator and the stator contacts are on the opposite surface and have portions which extend into openings in the stator and are soldered to the circuit.
A further feature is that the circuit includesspiral inductors with the beginning terminal of one inductor aligned with the end terminal of the adjacent and connected by a stator clip extending radially outwardly from the rotor opening.
And another feature is that the rotor blade is spaced from the stator surface, as by a flange on the rotor body, the blade having legs thereon which extend through the opening in the stator and overlie the opposite stator surface to hold the rotor in place.
FIG. 1 is an illustration of one face of the stator (before soldering), showing the circuitry thereon;
FIG. 2 is a view of the opposite face of the stator;
FIG. 3 is an enlarged section through the rotor;
FIG. 4 is an enlarged section through a stator clip;
FIG. 5 is an exploded view of the rotor;
FIG. 6 is an enlarged, fragmentary view showing the mounting of a stator contact on the stator; and
FIG. 7 is an enlarged section along line 7-7 of FIG. 2.
The invention is illustrated in a switch section for a VHF television tuner; and certain features of the switch are particularly adapted for this use. However, some features of the switch may be used in other types of rotary switches and particularly other rotary switches having printed circuitry on the stator elements.
The switch section has a stator 10 and a rotor 11, 169 1 and 2. Stator 10 is a phenolic or other insulating sheet material with a central rotor opening 13 and a pair of mounting tabs l4, 15 to be received in slots in the frame of a tuner (not shown). On the face 10a of the stator section illustrated in FIG. 1, there are a series of inductor sections 16-2 through 16-13, corresponding with the 12 VHF television channels. The inductor sections are preferably printed circuitry deposited or etched in a suitable manner. Inductor 16-2 has a spiral configuration starting at an inner terminal 16-2a and ending at an outer terminal 16-2b. Each of the terminals is defined by a conductive area surrounding an opening in the stator which also receives mounting portions of the stator contacts, as will appear. There are two sets of openings 17-1 through l7-13 and 18-1 through 18-13 with each set of openings being concentric about the rotor opening and with corresponding openings elongated radially with respect to the rotor opening.
The numerical suffix for the radially aligned pairs of openings is determined by the relative position of the opening closest the rotor opening and representing the inner terminal of each of the spiral inductors. For example, the inner terminal l6-2a of inductor 16-2 is formed around opening 17-1 while the outer terminal 16-2b of the inductor is formed around opening 18-2. This pattern is continued for inductors 16-3 through 16-6 of the low frequency portion of the VHF band. Inductors 16-2 through 16-6 are connected in series by the stator contact clips, described below. Inductors 16-7 through 16-13 do not have a spiral configuration and are connected between conductor 19 and terminals at openings 17-7 through 17-13. Only a portion of the inductor terminals and openings are numbered in FIGS. 1 and 2, to indicate the pattern of identification. Applying a reference numeral to each would unnecessarily complicate the drawing.
Stator clips 20-1 through 20-13 are mounted on the face l-b of the stator, surrounding the rotor opening 13. Each of the stator clips has mounting portions extending into the appropriate mounting openings and, in the completed form of the switch section, are secured by solder, not shown in FIG. 2. The stator clips have a pair of wiping contact surfaces 20a, 20b (FIG. 3) in a plane spaced from and parallel with the surface of the stator 10. This eliminates the need for slots extending outwardly from the rotor opening to receive the stator contact as in the usual switch section such as shown in Gelzer US. Pat. No. 2,954,469. The entire surface of the stator surrounding opening 13 is available for the printed circuitry.
The inner terminal 16-6a of inductor 16 is not connected with stator clip 20-6, but is formed around opening 19 for connection with another circuit element. Rotor 11 has a body 22 on which a rotor contact plate 23 is mounted. The rotor body, which may. be molded or plastic, has a boss portion 24 (FIG. 4) which is received in the rotor opening 13 of the stator. A flange 25 extends outwardly beyond the rotor opening and bears against the surface of the stator. The rotor contact blade 23 overlies the flange 25 and is positioned by the flange in the plane of the contact surfaces of the stator clips, spaced from the stator surface. Rotor blade 23 has amounting legs 26 which extend through openings 27 in the flange and lie in grooves 28 in the surface of boss 24. The ends 26a of legs 26 extend outwardly along the surface 10a of the stator, cooperating with flange 25 to secure the rotor in place. A central opening 30 in the rotor receives a shaft (not shown) for turning the rotor with respect to the stator. The rotor may have a resilient wall section which accommodates dimensional variations in accordance with US. Pat. No. 3,213,253.
The stator clips 20 (FIG. 4) are preferably a single length of suitable resilient contact material having (except clip 20-1) double wiping surfaces 20a, 20b fonned at the ends thereof. The contact is folded at 20c and the folded portion is bent at. right angles to the plane of the contact forming a first mounting portion 20d. A tang 202 extends from the contact parallel with mounting portion 20d, forming a second mounting portion intermediate the ends thereof. Mounting portion 20d is received in one of the outer mounting openings 18 while tang 20e is received in one of the inner circle of mounting openings 17. Tang 202 has a longitudinal stiffening rib 20f (FIG. 6), and is pressed into stator opening 17 with a force fit. The end of tang 20e is formed over upon insertion and engages the stator. The clip is thus held in position during assembly.
In the manufacture of the switch section, the printed circuitry is applied to the punched stator blank. The rotor is then assembled by inserting the rotor body 22 with the rotor blade 23 mounted thereon into opening 13. The ends of legs 26 are then formed outwardly to retain the rotor on the stator. With the rotor in place, the stator clips are mounted on the side of the stator opposite the printed circuitry. Long stator clip 20-1 has only an upper leaf 20-1a which engages, the rotor blade 23, FIG. 7. With the rotor in the position of FIG. 2, all stator clips may be assembled on the stator board 10 by automatic insertion machinery. The lack of a lower leg on contact 20-1 avoids interference with the rotor blade.
1 Next additional circuit components (not shown) and connecting wires for the switch are mounted with the ends of the terminals extending through appropriate openings in the stator. The assembly is then soldered, as by dip soldering, completing the electrical contact circuit between the terminals of the inductors and the stator clips, physically securing the clips in place and mechanically and electrically connecting the other components and wires (FIG. 4).
I claim: 1. A printed circuitswitch comprising: a stator of sheet material with a rotor opening therein; circuitry printed on one face of said stator; stator switch clips mounted on the other face of the sheet and connected with said circuitry, the stator being unslotted and the switch clips each have a wiping surface spaced outwardly from the surface of said stator;
a rotor member of insulating material received in said rotor opening, having a flange extending radially outwardly beyond the rotor opening in the stator and bearing-against the surface thereof and a boss portion extending from the flange into the opening in the stator, with a plurality of holes in the flange and grooves in the peripheral surface of the boss, aligned with the holes; and
a contact blade on said rotor, spaced by said flange from the surface of the stator, to lie in the plane of the wiping surface of said stator contacts for switching engagement with said stator clips on said one side of the stator, said contact blade having legs which extend through the holes and the grooves of the rotor with the ends thereof overlying the surface of the stator opposite that on which the stator switch clips are mounted to hold the rotor on the stator.

Claims (1)

1. A printed circuit switch comprising: a stator of sheet material with a rotor opening therein; circuitry printed on one face of said stator; stator switch clips mounted on the other face of the sheet and connected with said circuitry, the stator being unslotted and the switch clips each have a wiping surface spaced outwardly from the surface of said stator; a rotor member of insulating material received in said rotor opening, having a flange extending radially outwardly beyond the rotor opening in the stator and bearing against the surface thereof and a boss portion extending from the flange into the opening in the stator, with a plurality of holes in the flange and grooves in the peripheral surface of the boss, aligned with the holes; and a contact blade on said rotor, spaced by said flange from the surface of the stator, to lie in the plane of the wiping surface of said stator contacts for switching engagement with said stator clips on said one side of the stator, said contact blade having legs which extend through the holes and the grooves of the rotor with the ends thereof overlying the surface of the stator opposite that on which the stator switch clips are mounted to hold the rotor on the stator.
US881201A 1969-12-01 1969-12-01 Improved wafer rotary switch with stator printed circuit contact structure and rotor Expired - Lifetime US3581023A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2768853A1 (en) * 1997-09-25 1999-03-26 Magneti Marelli France Electrical contact piece for vehicle instrument panel

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2789212A (en) * 1953-06-12 1957-04-16 Rca Corp Two-band tuner with stator carried coil inductors and rotor carried strip inductor
US2954469A (en) * 1958-12-22 1960-09-27 Oak Mfg Co Switch type television tuner with stamped tuning element mounted on stationary contacts
US2989710A (en) * 1958-11-03 1961-06-20 Sarkes Tarzian Adjustable inductance unit
US3013231A (en) * 1955-12-30 1961-12-12 Sarkes Tarzian Television tuner
US3209110A (en) * 1962-12-06 1965-09-28 Oak Mfg Co Self-aligning contact assembly
US3248488A (en) * 1961-02-20 1966-04-26 Globe Union Inc Switch construction and contact clip mounting arrangement therefor
US3268674A (en) * 1965-01-29 1966-08-23 Oak Electro Netics Corp Switch section for a rotary electric switch
US3350530A (en) * 1965-12-16 1967-10-31 Lucas Industries Ltd Switches for use with flexible printed circuits
US3389235A (en) * 1967-03-23 1968-06-18 Oak Electro Netics Corp Rotary switch
US3500290A (en) * 1968-07-01 1970-03-10 Beckman Instruments Inc Terminal construction for electrical circuit element

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2789212A (en) * 1953-06-12 1957-04-16 Rca Corp Two-band tuner with stator carried coil inductors and rotor carried strip inductor
US3013231A (en) * 1955-12-30 1961-12-12 Sarkes Tarzian Television tuner
US2989710A (en) * 1958-11-03 1961-06-20 Sarkes Tarzian Adjustable inductance unit
US2954469A (en) * 1958-12-22 1960-09-27 Oak Mfg Co Switch type television tuner with stamped tuning element mounted on stationary contacts
US3248488A (en) * 1961-02-20 1966-04-26 Globe Union Inc Switch construction and contact clip mounting arrangement therefor
US3209110A (en) * 1962-12-06 1965-09-28 Oak Mfg Co Self-aligning contact assembly
US3268674A (en) * 1965-01-29 1966-08-23 Oak Electro Netics Corp Switch section for a rotary electric switch
US3350530A (en) * 1965-12-16 1967-10-31 Lucas Industries Ltd Switches for use with flexible printed circuits
US3389235A (en) * 1967-03-23 1968-06-18 Oak Electro Netics Corp Rotary switch
US3500290A (en) * 1968-07-01 1970-03-10 Beckman Instruments Inc Terminal construction for electrical circuit element

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2768853A1 (en) * 1997-09-25 1999-03-26 Magneti Marelli France Electrical contact piece for vehicle instrument panel

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