US2447718A - Rotary switch - Google Patents

Rotary switch Download PDF

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US2447718A
US2447718A US705623A US70562346A US2447718A US 2447718 A US2447718 A US 2447718A US 705623 A US705623 A US 705623A US 70562346 A US70562346 A US 70562346A US 2447718 A US2447718 A US 2447718A
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contact
contacts
switch
members
cylindrical
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US705623A
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Ray R Simpson
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Simpson Electric Co
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Simpson Electric Co
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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H19/00Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid external to the switch, e.g. by a hand
    • H01H19/54Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid external to the switch, e.g. by a hand the operating part having at least five or an unspecified number of operative positions
    • H01H19/56Angularly-movable actuating part carrying contacts, e.g. drum switch
    • H01H19/58Angularly-movable actuating part carrying contacts, e.g. drum switch having only axial contact pressure, e.g. disc switch, wafer switch
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H11/00Apparatus or processes specially adapted for manufacture of electric switches
    • H01H11/0056Apparatus or processes specially adapted for manufacture of electric switches comprising a successive blank-stamping, insert-moulding and severing operation
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H19/00Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid external to the switch, e.g. by a hand
    • H01H19/02Details
    • H01H19/03Means for limiting the angle of rotation of the operating part
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H19/00Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid external to the switch, e.g. by a hand
    • H01H19/02Details
    • H01H19/10Movable parts; Contacts mounted thereon
    • H01H19/11Movable parts; Contacts mounted thereon with indexing means
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00Machine element or mechanism
    • Y10T74/20Control lever and linkage systems
    • Y10T74/20576Elements
    • Y10T74/20636Detents

Description

Aug. 24, 1948. R. R. slMPsoN ROTARY SWITCH 2 Sheets-Sheet 1 Filed Oct. 25, 1946 R. R. SIMPSON ROTARY SWITCH Aug. 24, 1948.
2 Sheets-Sheet 2 Filed Oct. 25, 1946 Patented Aug. 24, 1948 ROTARY SWITCH Bay B.. Simplon, River Forest, Ill., assigner to Simplon Electric Company, Chicago, Ill., .a corporation of Illinois Anuman october 25, 194s, serial No. '105,623
' 4 claim. (ci. 20o-11) 'I he present invention relates to rotary switches, and is -particularly concernedwith lswitches of the type'having multiple contacts and' snap means for retaining the switch in any o! its predetermined positions.
The multiple contact switches of the prior art of this type involve a considerable amount of labor, inasmuch as each of the contacts must be riveted or otherwise secured to a suitable base, such as a, resin-impregnated insulating board-,in the devicesoi the prior art. For example, such a switch constructed according to the methods of the prior art would involve the separate handling of eighteen contacts on one contact plate and from one to three, or more, on the other.
Furthermore, in the devices of the prior art it is diiicult to secure the contacts in a relatively permanent way. as the rivets sometimes become loose, and one of the objects of the invention is the provision of an improved rotary switch of the multiple contact type in which all of the ycontacts may be simultaneously mounted and secured at the same time, so as to eliminate much of the labor and the time-consuming operations involved in making the devices of the prior art.
Another object of the -invention is the provision of a multiple contact rotary switch in which the contacts are more firmly secured, and which may be constructed with any number of its contacts separated or tied together byan .electrical connection, thus eliminating the necessity for effecting electrical connections at other points when contacts should be tied together. l
Another object of theinvention is the provision of an improved rotary switch structure which is adapted to keep the contacts constantly in a bright and shining good-contact condition, due to the wiping action which is involved in the moving contact passing over the xed contacts,.and due to the resilient character of the contact engagement.
Another object of the invention is the provisionv of an improved rotary switch structure which is simple, capable of economical manufacture, which has alminimum numberoi parts to be assembled, and which has a snap action so that contacts are quickly broken and quickly made.
Another object of the invention is the provision of an improved switch construction which is dustproof, and the mechanism, such as the contacts and switch, is so enclosed that it permits the more satisfactory use of a lubricant whenever it is required, and also avoids the catching of dust by the lubricant.`
Another object of the invention is the provision 0f an improved switch construction in which there is no possibility of loose-parts becoming lodged in the switching mechanism or becoming damaged in the handling, processing, repairing, servicing, etc.. and in which all of the contact-making parts are shielded by a suitable housing so that they are protected against damage.
Another object of the invention is the provision of an improved lmethod of making electric` switches and, in particular, of the handling of the multiple fixed contacts, which is equally adaptable to a construction in which the contacts are secured by being embedded in a molded part, or in which the contacts are riveted or otherwise secured to an insulating support.
Other objects and advantages of the invention will be apparent from the following description and the accompanying drawings, in which similar characters of reference indicate similar parts throughout the several views.
Referring to the drawings, of which there are two sheets,
Fig. 1 is a front elevational view of a rotary switch embodying the invention, mounted upon a panel.
Fig. 2 is a sectional view showing a fragment of the panelt'aken on the plane of the line 2-2 of Fig. 1, looking in the direction of the arrows.
Fig. 3 is a sectional view taken on the plane of the line 3-3 of Fig. 2, looking in the direction of the arrowsl showing the snap mechanism and the structure of the housing.
Fig. 4 is `a Isectional view taken on the plane o! the line 4-4 of Fig. 2, looking in the direction of the arrows.
Fig. 5 is a sectional view taken on the plane of the line 5 5 of Fig. 2, looking in the direction of the arrows, showing the multiple contact plate.
Referring to Figs. 1, 2 and 3, vIll indicates, in its entirety. a rotary switch embodying the invention, which is mounted upon a panel II and provided with an actuating knob I2. The present rotary switch preferably includes a base member I3, an indexer il, a common contact plate I5. a multiple contact plate I6, and anvoperating shaft I1 which carries a movable contact rotor IB.
'I'he housing or base member I3 may consist of a molded insulating member of substantially cylindrical form, which has its end wall I9 provided with a metal bushing 20 adapted to serve as a bearing for the shaft I1. Bushing 20 is formed with a radially extending flange 2| having a peripheral groove 22 by means of which this face 2?! of which is cylindrical. The inner sur- 4 :face of the side wall 2t is also cylindrical at the peints 2t, als and 3d, but is formed with enlargements between these points for housing .the springs 3i and the steel balls 32 which serve as a snap mechanism and also for retaining the switch in any of its predetermined positions.
The enlargements of the side wall 2s are formed with the elongated recesses 33 which are bounded by the side wall on the outside and by oppositely extending flanges 34 and 35 on the inside.
Inside the recesses the inner side of the Wall, indicated at 36, is again cylindrical, providing space for the outwardly bowed springs 3i. The ends cf the springs 3i are preferably received in rectangular sockets 31, 38 which are substantially as deep as the width of the springs.
The sockets 37 and 38 are located tp engage the ends of the springs when the springs are suit-ably bowed, but there is sumcient clearance at the ends of the springs to permit the springs to straighten out slightly when the balls 32 move into the grooves or recesses on the indexer. The opposed retaining flanges 3d, 35 serve as guides for the ball 32, and may have plane end surfaces 39, 40 spaced from each other sufliciently to receiveA the ball 32.
The springs 3i may comprise a plurality, such as, for example, four, or more, or less, of leaf springs, which are initially deformed to substantially the shape shown in Fig. 3, but have to be bowed still farther to insert the balls 32 and place them under predetermined radial pressure. The springs 3| may be made of any suitable material, such as clock spring steel or Phosphor bronze, or the like.
In order to balance the pressure which is placed upon the shaft and its rotating parts by the springs 3|, three such spring and ball assemblies are preferably provided and located at three equally spaced points about the periphery of the base I3. The base I3 is also preferably provided with an arcuate slot 4I which may be rectangular in shape and substantially annular, except that the slot is closed by a wall 42 at one side of the housing I3, the wall serving as a stop which is to prevent further rotation of the rotary switch beyond its initial position.v
The indexer I4 may consist of a molded insulating member which is substantially cylindrical in form, having a pair of plane sides 43 and 44, but its periphery 45 is formed with a plurality of grooves 46 and partially cylindrical projections 41 somewhat in the nature of scallops. The grooves 46 serve as indexing positions into which the balls 32 simultaneously move when the rotary switch has its movable contact engaging a fixed contact.
The partially cylindrical projections 41 between the grooves 46 serve as camming shoulders to cam the balls 32 outward when the switch isv turned, and also to permit the balls to cam the switch onward in its rotary action due to the tendency of all of the balls to move into the next s""oove.
The top of each hp di on the indexer ld provides an unstable position for the balls 32 .trom which the indexerv tends to move into the next switch position. it its center the indexer is is formed with an aperture iis which may be substantially cylindrical, but has attened sides d@ corresponding to the shape of the end portion Eil of the shaft with which the indexer is intended to turn.
The number of grooves and ridges on the indexer iii may each correspond to the number of switch positions, and the size oi' these grooves and ridges is such that all oi the balls 32 move simultaneously into grooves as the indexer is turned.
The actuating knob i2, base it, indexer i6, common contact plate It, and multiple contact plate It may all be formed out of a phenolic condensation compound, which is molded by the applicat'ion of heat and pressure, or they may be formed out oi any initially plastic and moldable insulating resin.
The indexer I4 also supports a stop member li which may consist of a substantially cylindrical metal body having a reduced cylindrical portion E2 projecting axially from the indexer I4 in a position to move in the slot 4I which is concentric with respect to the axis of the shaft I1. The body-of the stop member 5I preferably has a peripheraily extending groove 33 which serves to anchor this stop member in the mold.
When the switch is in its initial position, such as position No. 1, the stop member 5I engages one side oi the wail 42. When it reaches its final position I8 the stop member engages the other side of the wall 42-in the slot 4|. l
The shaft 50 may consist of a substantially cylindrical metal rod made of any suitable material, such as steel, cadmium plated, having aV cylindrical bearing portion 54 and the flattened portion 50.
At each end oi'the cylindrical bearing portion there is a groove 55, 56 which may be of rectangular cross-section for receiving a split spring ring 51, 58 which may nt in the groove, and may have a projecting rectangular portion adapted to serve as a thrust surface. Thus the split rings 51, 5I are adapted to engage the ends of the bushing 20 and to prevent axial movement oi the shaft I1.
The inner cylindrical surface 59 of the bushing serves as a. bearing for the cylindrical portion 54 of shaft I1. The shaft is preferably provided with an actuating member, such as the knob I2, which may also be made of molded insulating material. Knob I2 may'have a substantially circular body with a cylindrical outer edge 6I and a frusta-conical top surface l2.
'I'he body 60 supports an integral pointer member 63, also serving as a handle. and consistingv of a relatively thick flange which projects axially from the body 60 and also extends radially beyond the edge 8i at the pointer end 64 and at the handle end 65. The handle end of the knob I2 may have the opposed plane sides I6 and 61 which are parallel to each other, and which terminate in a plane end surface 83. This portion of the-flange 83 may be grasped by the ngers, and its top surface Blmay also be plane.
The pointer end u of this body may have the two side surfaces 1l and 1I taper toward each other and toward a blunt point 12.
The body 30 is formed with an axial cylindrical bore 13 for receiving the end of the shaft I 1, and this bore 13 may extend up into the flange 63 where it communicates with a. threaded bore 14 aurais 5 extending inwardly from the end surface Il. A set screw 1l in the threaded bore 14 is adapted to engage the shaft I1 and secure the knob I2 on the shaft.
In order to provide a still more accurate and dennite indicia on .the pointer, the pointer is preferably provided with an embedded strip of metal 1I. When the knob I2 is molded of black material, the metal strip 10, for example, may be made of a silvery color, such as a steel or aluminum strip.
The strip 10 is preferably quite narrow, as it acts as the sharpest pant of .the pointer, and it extends across the wide rear portion of lthe flange .Il and down a sloping surface 'I1 of the pointer end 04 and terminates at the bottom 10 of the knob I2. Such a strip may be of substantially uniform width, except -that it is preferably provided with two or more enlargements 19 which may be apertured so that the molded material will ow through the apertures [to anchor the strip in place.
The strip 10 preferably projects outwardly from the knob I2 by a uniform amount, and it thus serves as an accurate indicium .to be lined up with the switch indicating positions which are indicated on the dial by the numerals I I andthe dots or small circles 02.
'Ihe conical portion 02 of the knob body 0I may also have a plurality of radially extending ribs 83 serving. in some cases, as additional indicia. y
The common contact plate I also comprises a molded insulating member which is circular in shape, its outer edge 04 being cylindrical and of the same size as the outer edge 21 of the base I9. This common contact plate is illustrated best in Figs. 2 and 4. It has a plane surface 05 on the side toward the indexer I4, and on its other side it is formed with a shallow cylindrical recess- 06 adapted to receive one of the halves 01 or' the rotor I0.
The common contact plate I9 is also formed with a larger concentric shallow cylindrical recess 00 which has an annular surface '09 surrounding .the recess ll. Seated in the annular recess 99 there is a contact ring 90 comprising an annular metal member oi suitable ma-terial, such as copper, having a circular outer edge 9| (Fig. 4) and a circular inner edge 02.
The contact ring 90 may carry one or more radially extending contacts 92, 94, 95, which form an integral part of the ring 90. These contacts 93-95 comprise radially extending strips of the same metal, which are long enough .to project beyond the edge wall 94 of the common contact plate I0, leaving an outwardly projecting portion which may have an oval aperture 96 for each contact.
In many cases it will only be necessary that this common contact have only one terminal 93, 94 or 95, and the other terminals may be cut off, but in other cases connections may be made simultaneously to three circuits utilizing all of the contacts 93-95.
The ring 90, with its contacts 9-9-95, may be secured to the common contact plate I5 by being molded in this body so that the contacts 93--915 pass through the -side wall of the recess 09. The three contacts thus assure .the anchoring of the ring 90.
The multiple contact plate I6 may also consis-t of a molded member which is substantially circular, and which has a cylindrical outer edge 91 flush with the edges 21 and. of the parts I2 and II.
' Like the plate I5, the plate I9 is formed with a relatively small and shallow cylindrical recess 90 for receiving the other half 99 of the rotor i9. The purpose of the shallow cylindrical recesses 00. 90 is .to act as bearings for rotatably supporting the rotor .disk I0. It is also formed with a cylindrical bore |00 at its center for passing the shaft I1 and permitting its rotation in this bore.
Multiple terminal plate I0 is also provided with a larger cylindrical recess IBI4 surrounding the shallow recess 90 and forming a movable contact chamber |02.
'I'he multiple contact plate I8 is shown in Fig. 5. and an annular wall |03, which surrounds .the larger annular reces-s IOI, has embedded in it a multiplicity of radially extending, equally spaced contacts |04. These contacts have rounded inwardly extending end portions |05 located in the chamber |02 and projecting from the wall IOI of the recess.
The radially extending spaced contacts |04 are all an integral part and supported by an annular member |01, only part of which is shown in Fig. 5, and this enables the operator to pick up all :the contacts at once and to hold them in proper position to be embedded in a molded part, or to beriveted, or otherwise secured to an insulating suplport. In the latter case, the rivets would have to bepapplied to each part, which might be done by a riveting machine having multiple tools, but the operator need not handle every contact separately. The radial contacts |04 also extend outwardly from the outer wall 91, and are preferably .provided with the punched oval apertures |00, by means of which conductors are secured and soldered to .these terminals. At the time these contacts I 04 are embedded in .the plate I0 they are all joined by a closed ring, a part of which is shown at |01 in Fig. 5, and thus the -contacts |04 for the mul-tiple contact plate I6 are all heid in their proper position by the ring |01. 'Ihey may all be placed in the mold simultaneously, and they will be automatic-ally located as desired.
After the part IIi has been completed and it is known Just how the contacts are to be used, .the
member I6 may be placed in a die, and .the ring |01 may be sheared off, leaving the rounded end portions |08 on all of the contacts |04, and leaving the contacts all separated.
In other cases, where a simultaneous connection is to be made by several contacts, a portion, or portion-s, of :the ring |01 may be left on the outer ends of the contacts I 04. Thus two or three,
' -or more, of these contacts may be joined together,
or the contacts may all be separatedv by shearing olf the ring entirely.
'Ihe rotor I0 may consist of a pair of similar members 01 and 99, oppositely disposed, and located side by side to form a disk-like rot-or. Each of these members 91 and 99 comprises a disk of molded insula-ting material which is `formed with a generally cylindrical central aperture |09, but which also has the flat sides I I0 corresponding to the shape of the flattened end por-tion 50 of the shaft I1.
The size of the two disks 81 and 99, in so far as diameter is concerned, is such that they are adapted to rotate Within the shallow recesses 86 and 59. The thickness of these two disks 81 and 99 is such that when they flatly engage each other they fit Within the space provided for them between the plates I5 and I6.
-Each of these disks 91 and 99 is formed with a groove III which is deep enough to house onehalf oi' the movable contact II2 (Fig. 2). The movable contact II2 may be formed out of resilient metal, such as a Phosphor bronze or a reamarre sllient brass, and it consists of two .legs which are bent bach upon each other at the lli-bend M3.
Each oi these lees may consistera strip of metal of uniform width and thickness, except that each has a laterally projecting anchoring formation iid, and these anchoring formations are preferably on both edges, thus giving the anchor part of the contact iid a cruciform shape.
The groove 6M is of complementary cruclorrn shape, so that one-half;` of the contact iid fits into each of the disks el and When the dislzs 8l and @Si are held in engagement with each other, as shown in -Fig. 2, the cruciiorm end portion lle is firmly anchored between these two disks.
In addition to the anchoring portion liti of the contact H62, the two legs of this contact prolect outwardly from the rotor i@ and are spread apart from each other in the shape ot an acute V, as shown in Fig. 2, so that-they come into engagement with the contact ring @il and also with the inner ends lull of the multiple contacts The ends of the legs of the contact lill form contact fingers ilaand iih and are preferably curved toward each other at a point lill. which may be midway between the edaes of the ring all so that the extreme ends of these legs project toward each other. rlhe spread of the legs of contact il@ is slightly greater than the distance between the Contact @d and .the Contact terminals ldd, and this movable contact litresilientiy engages the common contact and any one of the multiple contacts Between each of the xed contact portions i635 the annular surface lil (Fig. 5) or the plate it is preferably provided with a substantially rectangular recess or depression lid. These depressions prevent short-circuit from contact iil to another contact 05 after a long period of use, when metal 'particles might be carried by the moving contact H2 across the surface ill in suilcient amount to metalize the surface. When, and if, that occurs, the contacts E05 will, nevertheless, be separated byI a deilnite break at the slots H8.
The housing i3, common contact plate i5, and
multiple contact plate Iii are all preferably provided with a. multiplicity; such as. for example, three, of registering apertures ils-Hl, located in the outer walls. of these members and nigularly spaced from each other for receiving the screw bolts |22 which are provided with nuts |23. A spring washer |24 is preferably included v in the assembly, and any number of common contact plates i5 and multiple contact plates I6 may be mounted together with a plurality of the bolts |22.
It is an important feature of the invention that the fixed and movable'contacts are all enclosed in the chamber i02, which is practically dustproof, and in which they are housed to protect them against damage in handling, shipping, using, assembling, etc. In addition to this, the chamber H12 permits the more satisfactory use of a lubricant on the contacts and aviods the tendency of the lubricant to catch dust, as in the case where open contacts are employed.
Although in Fig. 2 I show only one multiple contact plate IB, two or three, or any number. may be added ina stack and actuated by a. common shaft which, of course, should be of an appropriate length. Thus a great many rotary switches may be actuated by a common shaft.
The operation of the present rotary switch will be apparent from the description of its parts.
The same shaft [Il supports the indexer ill, therounded portions dl o1 which cam the springpressed balls 232 outward until all the balls simultaneously drop into the next groove, which is the next switching lwsition.
The action of the springs and balls provides a snap action 'as well as a dehnite position in which the switch is held. Since three spring-prsed balls are provided, there is no side thrust on the shaft, and the springs exert a balanced action on the indexer and shaft.
My methodof making terminal plates or other switch members'fmay briefly be summarized as follows: The multiple contacts which are to be used in such a switch member are formed by a punching operation out ci a common sheet' ci metal, with all of the contacts extending inwardly from an integral metal ring which supports them. f
The contacts and this ring are placed in a rnold which is then filled with a molding material, such as a phenolic condensation compound, in which the contacts are embedded. the supporting ring being'located in another enclosed part of the mold, or projecting outwardly from the mold. Heat and pressure are then applied until the molding material has become solidified. The mold is removed, and then all, or such portions of thesupportingmetal ring for the contacts as are desired. may be removed by a punching oper- -ation.
. At the same time, the external ends of the terminals may be suitably formed with a rounded end and/cr a punched aperture. Thus all ci.' the multiplicity of contacts may be simultaneously put in place in one operation. The handling of these small members is eliminated and the tedius labor of assembling such. a switch is greatlyreduced.
z It will thus be observed that I have invented an improved rotary switch and an improved method of manufacturing the same. Instead of the tedious labor which is involved in the devices of the prior art in the placing of each' separate contact terminal, and the riveting or other securement of dach terminal to a post. all of the multiplicity ot contact terminals may be simultaneously in place by molding them in the terminal plate, after which the supporting ring which' held them in place may be completely removed by a punching operation. or parts of it may be removed to leave the contacts all separated, or leave some oi' them tied together.
In case the contacts are to be riveted to an insulating support instead of being embedded in a. molded part, the present method still has very important advantages. The operator can pick up and place all of the ilxed contacts in one operation, and they are simultaneously held in place to be secured by rivets or eyelets, or other suitable fastening means. The operator need not pick up each of these contacts separately, and thus a great deal of time and labor is saved.
The present switch is adapted to maintain the position of its ilxed contacts throughout its full life without any possibility of becoming loose. as in the case of riveted terminal contacts. The Job of assembly of such a switch involves a mini- 9 mum amount of llabor, and may be accomplished byunskilled labor.
Therefore, the switch may be produced at a very low cost, and it may be sold at a price which is within the reach of a vast number of users.
Machine operations in the manufacture of this switch are reduced to an absolute minimum, and the contacts can be manufactured by punching and stamping operations. The only machining which is required is that involved in the formation of the shaft, its bushing, and the stop member for the indexer.
While I have illustrated a preferred embodiment of my invention, many modifications may be made without departing from the spirit of the invention, and I do not wish to be limited to the precise details of construction set forth, but de.- sire to avail myself of all changes within the scope of the appended claims.
Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States, is:
l. An electric switch member comprising a molded insulating cup-shaped body, a plurality of sheet metal contact members formed of an integral piece of metal projecting radially inwardly through said body and exposed inside said body, a plurality of said contact members being separated from each other at their outer projecting ends which serve as connectors, and others of said contact members being maintained connected by an annular sheet metal body member, a second molded insulating cup-shaped member having imbedded therein a sheet metal annular contact member provided with radially outwardly extending contact tongues, each of said cupshaped members having a small shallow cylindrical recess centrally located in its cup and provided with a central bore, a rotor comprising a pair of insulating disks located in said smaller recesses and engaging each other, a movable wiping contact finger having an anchoring formation and a linger for engaging the first-mentioned inwardly projecting contacts of the first insulating cup member, and a second finger for engaging the annular contacts of th'e second-mentioned insulating member, said movable contact member having its anchoring formations confined in a complementary recess between said disks, and means for securing said cup-shaped members together and simultaneously holding said disks together and securing said movable contact to said disks in the recess formed by said two cup-shaped members.
2. An electric switch comprising an insulating cup-shaped body, a plurality of sheet metal contact members formed of an integral piece of metal projecting radially inwardly through said body and exposed inside said body, said contact members being initially connected by an annular sheet metal supporting member which may be maintained as a connection for said contact members or severed from the contacts to render other contact members independent of the others, a second insulating cup-shaped member -having located therein a sheet metal annular contact member provided with an outwardly extending radial contact tongue,each of said cupshaped members having a small shallow cylindrical recess centrally located in its cup and provided with a central bore, a rotor comprising an insulating disc located in said smaller recesses, a movable wiping contact linger having a supporting flange and a finger for engaging the first-mentioned inwardly projecting contacts Of 10 the first insulating cup member, and a second linger for engaging the annular contact of the second-mentioned insulating member, said movable contact member being secured to said disc to be rotated thereby, and means for securing said cup-shaped members together and for confining said rotor in the recesses formed in said two cup-shaped members.
3. An electric switch comprising an insulating cup-shaped body, a plurality of sheet metal contact members formed of an integral piece of metal projecting radially inwardly through said body and exposed inside said body, said contact members being initially connected by an annular sheet metal supporting member which may be maintained as a connection for said contact members or severed from the contacts to render other contact members independent of the others, a second insulating cup-shaped member having located therein a sheet metal annular contact member provided with an outwardly extending radial contact tongue, each of said cupshaped members having a small shallow cylindrical recess centrally located in its cup and provided with a central bore, a rotor comprising an.insulating disc located in said smaller recesses, a movable wiping contact finger having a supporting flange and a finger for engaging the first-mentioned inwardly projecting contacts of the first insulating cup member, and a seco'nd finger for engaging the annular contact of the second-mentioned insulating member, said movable contact member being secured to said disc to be rotated thereby, means for securing said cup-shaped members together and for confining said rotor in the recesses formed in said two cupshaped members, and an actuating shaft passing through said central bore and through said rotor and having a pointer handle for rotating said shaft and rotor to actuate said switch.
4. An electric switch comprising an insulating cup-shaped body, a plurality of sheet metal contact members formed of an integral piece of metal projecting radially inwardly through said body and exposed inside said body, said contact members being initially connected |by an annular sheet metal supporting memberwhich may be maintained as a connection for said contact members or severed from the contacts to render other contact members independent of the others, a second insulating cup-shaped member having located therein a sheet metal annular contact member provided with an outwardly extending radial contact tongue, each of said cupshaped members having a small shallow cylindrical recess centrally located in its cup and provided with a central bore, a rotor comprising an insulating disc located in said smaller recesses, a movable wiping contact finger having a supporting ange and a finger for engaging the first-mentioned inwardly projecting contacts of the first insulating cup member, and a second linger for engaging the annular contact of the second-mentioned insulating member, said movable contact member being secured to said disc to be rotated thereby, means for securing said cup-shaped members together and for confining said rotor in the recesses formed in said two cupshaped members, an actuating shaft passing through said central -bore and through said rotor and having a pointer handle for rotating said shaft and rotor to actuate said switch, and an indexer for said switch, comprising a support to @www 31 il y be secured to sm@ switeh member, a, notched disc rotated by sszd shaft, @und a lomxmity of spying www@ STATES PATENTS messed balls engaging in .the notches @i am@ Number Nam@ me@ ise. 2,463,453 Weyhe? July 31, 1.923 3s 2.399,9@6 Benley May 7, 1946 MY R. SIM'PSN. 2,433.9,459 SP'O fam. 22, 194i? REFERENCES ECHTE@ WQREQN @Amm-S Th@ following reeremces me @E recm im the Nummer Country Date @Re of this patelmzl@ @rem Edwin July 4, 93555
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Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2504027A (en) * 1946-10-23 1950-04-11 Kelley Koett Mfg Company Multiple-contact switch
US2561930A (en) * 1948-01-30 1951-07-24 Triplett Electrical Instr Co Selector switch
US2615729A (en) * 1948-10-15 1952-10-28 Atwood Vacuum Machine Co Bicycle kick stand
US2631211A (en) * 1948-01-30 1953-03-10 Triplett Electrical Instr Co Selector switch
US2694756A (en) * 1949-09-22 1954-11-16 Us Instr Corp Rotary switch
US2761923A (en) * 1951-04-20 1956-09-04 Bendix Aviat Corp Electrical switch
US2778229A (en) * 1953-10-29 1957-01-22 Gen Electric Co Ltd Devices for transmitting rotary motion
US2844749A (en) * 1955-07-13 1958-07-22 Gen Motors Corp Dynamo electric machine commutator connection
US2870274A (en) * 1955-05-26 1959-01-20 Standard Coil Prod Co Inc Electrical wafer switches
US2932709A (en) * 1958-01-09 1960-04-12 Chicago Telephone Supply Corp Miniature single pole single throw switch
US2988606A (en) * 1957-12-19 1961-06-13 Cts Corp Electric switch and method of making
US3195358A (en) * 1962-12-14 1965-07-20 North Atlantic Industries Sealed housing for electrical apparatus
US3200208A (en) * 1962-07-02 1965-08-10 Oak Mfg Co Rotary selector switch construction with rotor interlocking means
US3219785A (en) * 1960-02-01 1965-11-23 Cts Corp Multiple contact stator unit for rotary switch and method of making the same
US3254164A (en) * 1965-02-02 1966-05-31 Oak Electro Netics Corp Molded plastic switch with inwardly projecting contacts and rotor positioning structure
US3293382A (en) * 1965-02-26 1966-12-20 Oak Electro Netics Corp Multi-section rotary switch unitary index mechanism with improved spring biased detent ball and adjustable stop limit structure
US3442004A (en) * 1964-07-02 1969-05-06 Indak Mfg Corp Method of making electrical switches
DE2350661A1 (en) * 1973-10-09 1975-04-24 Ebe Elektro Bau Elemente Gmbh Rotary stepping switch with switching elements on common shaft - has each element of two stacked insulating rings with embedded contact strips
US4069723A (en) * 1974-08-16 1978-01-24 Incom International Inc. Detent positioning device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1463453A (en) * 1918-07-22 1923-07-31 Splitdorf Electrical Co Distributor block and method of making the same
GB431280A (en) * 1934-03-10 1935-07-04 Augustine Davy Improvements in and relating to rotary electric switches
US2399906A (en) * 1943-09-01 1946-05-07 Arrow Hart & Hegeman Electric Indexing means for multiposition electric switches
US2419469A (en) * 1943-04-24 1947-04-22 Gen Electric Manufacturing method for electrical contacts

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1463453A (en) * 1918-07-22 1923-07-31 Splitdorf Electrical Co Distributor block and method of making the same
GB431280A (en) * 1934-03-10 1935-07-04 Augustine Davy Improvements in and relating to rotary electric switches
US2419469A (en) * 1943-04-24 1947-04-22 Gen Electric Manufacturing method for electrical contacts
US2399906A (en) * 1943-09-01 1946-05-07 Arrow Hart & Hegeman Electric Indexing means for multiposition electric switches

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2504027A (en) * 1946-10-23 1950-04-11 Kelley Koett Mfg Company Multiple-contact switch
US2561930A (en) * 1948-01-30 1951-07-24 Triplett Electrical Instr Co Selector switch
US2631211A (en) * 1948-01-30 1953-03-10 Triplett Electrical Instr Co Selector switch
US2615729A (en) * 1948-10-15 1952-10-28 Atwood Vacuum Machine Co Bicycle kick stand
US2694756A (en) * 1949-09-22 1954-11-16 Us Instr Corp Rotary switch
US2761923A (en) * 1951-04-20 1956-09-04 Bendix Aviat Corp Electrical switch
US2778229A (en) * 1953-10-29 1957-01-22 Gen Electric Co Ltd Devices for transmitting rotary motion
US2870274A (en) * 1955-05-26 1959-01-20 Standard Coil Prod Co Inc Electrical wafer switches
US2844749A (en) * 1955-07-13 1958-07-22 Gen Motors Corp Dynamo electric machine commutator connection
US2988606A (en) * 1957-12-19 1961-06-13 Cts Corp Electric switch and method of making
US2932709A (en) * 1958-01-09 1960-04-12 Chicago Telephone Supply Corp Miniature single pole single throw switch
US3219785A (en) * 1960-02-01 1965-11-23 Cts Corp Multiple contact stator unit for rotary switch and method of making the same
US3200208A (en) * 1962-07-02 1965-08-10 Oak Mfg Co Rotary selector switch construction with rotor interlocking means
US3195358A (en) * 1962-12-14 1965-07-20 North Atlantic Industries Sealed housing for electrical apparatus
US3442004A (en) * 1964-07-02 1969-05-06 Indak Mfg Corp Method of making electrical switches
US3254164A (en) * 1965-02-02 1966-05-31 Oak Electro Netics Corp Molded plastic switch with inwardly projecting contacts and rotor positioning structure
US3293382A (en) * 1965-02-26 1966-12-20 Oak Electro Netics Corp Multi-section rotary switch unitary index mechanism with improved spring biased detent ball and adjustable stop limit structure
DE2350661A1 (en) * 1973-10-09 1975-04-24 Ebe Elektro Bau Elemente Gmbh Rotary stepping switch with switching elements on common shaft - has each element of two stacked insulating rings with embedded contact strips
US4069723A (en) * 1974-08-16 1978-01-24 Incom International Inc. Detent positioning device

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