US2151039A - Electrical switch - Google Patents

Description

March 21, 1939. R. E. LEHMAN ET AL ELECTRICAL SWITCH 3 Sheets-Sheet 1 Filed March 9, 1935 March 21, 1939. R. E. LEHMAN Er AL 2,151,039

ELECTRICAL SWITCH A 'L j6 b gxc. 45;'

March 21, 1939. R E. L EHMAN ET AL 2,151,039

ELECTRICAL SWITCH Filed March 9, 1955 3 Sheets-Sheet 3 90 j /05 .9 NweM/CM i hnnn "l n nnn l 8 zada/MW,

Mew-1 m4 f5 UM Patented Mar. 21, 1939 UNITED STATES PATENT OFFICE ELECTRICAL SWITCH poration of Maryland Application March 9, 1935, Serial No. 10,300

4 Claims.

Our invention relates bro'adly to electrical circuit controlling apparatus and more particularly to a selective circuit controlling apparatus which may be operated to control a multiplicity of coacting circuits.

One of the objects of our invention is to provide solenoid control devices which may be compactly arranged within a relatively small area ior controlling a large number of electrical circuits.

Another object of our invention is to provide a construction of solenoid switch having means shiftable to either of two limiting positions for closing an electrical circuit through contact f members supported directly by the means which houses the solenoid switch.

A further object of our invention is to provide a construction of solenoid switch in which a cylindrical housing provides mounting means for axially disposed electromagnetic windings, each of which are mounted on tubular supports with their axes extending coincident with the center line of the cylindrical housing for cooperatively controlling a shiftable armature member movable to either of two limiting positions for operating a contact system.

A still further object of our invention is to provide a simplified construction of two-position electromagnetically operated switch in which a cylindrical housing carries an electromagnetic operating Winding adjacent each end thereof, each adaptedto coactively operate upon a movable armature member shiftable to either of two limiting positions for controlling a contact system located intermediate the electromagnetic operating windings.

A further object of our invention is to provide a construction of solenoid actuated circuit controller which may be mounted in close proximity to correspondingly constructed circuit controllers for selectively actuating a multiplicity of electrical circuits within a relatively small area.

Other and further objects of our invention reside in the electrical solenoid switches of our invention and the construction of the solenoid switches, as set forth more fully in the specinca-tion hereinafter following by reference to the accompanying drawings, in which:

Figure 1 shows a circuit arrangement in which the solenoid switches of our invention are illustrated applied to an all electric combination action for organs; Fig. 2 is an elevational view showing one method of mounting the electromagnetic switches of our invention; Fig. 3 is a vertical sectional view taken on line 3--3 of Fig. 2; Fig. 4 is a lateral sectional view taken on line 4 4 of Fig. 2; Fig. 5 is a plan View of one of the electromagnetic switches constructed in accordance with our invention and showing the contact element in neutral position with both sets of electrical contacts open; Fig. 6 is a View corresponding to the view shown in Fig. 5 but illustrating the left hand contact system closed by movement of the armature toward the left; Fig. 7 is a side elevational view of the electromagnetic switches shown in Figs. 5 and 6; Fig. 8 is a cross-sectional view with parts shown partially in elevation taken through the electromagnetic switch on line 8 8 of Fig. 5; Fig. 9 is an end View of the electromagnetic switch shown in Figs. 5-7; Fig. 10 is a cross-sectional View taken on line lil-I0 of Fig. 8; Fig. 11 is a crosssectional view taken on line II-II of Fig. 8; Fig. 12 is a diagrammatic and schematic view showing the control circuit for the electromagnetic switch of our invention; Fig. 13 shows one arrangement of the contact system for the electromagnetic switch of our invention; Fig. 14 shows a modified arrangement of contact system for the electromagnetic switch of our invention; and Fig. 15 shows a further modied form of `contact system whichv may be provided for the electromagnetic switch of our invention.

For purposes of explaining our invention, we have shown the application of our construction of electromagnetic switch to an all electric combination action for organs, but we desire that it be understood that the electromagnetic switch of our invention is applicable to various kinds of electrical control circuits.

In Fig. 1, we have shown an all electric combination action for organs in which three stop keys have been illustrated at I, 2, and 3 arranged adjacent the control panel 4. Each stop includes a frame structure shown at 5, 6, and l, on which there is mounted the on control magnets 8, 9 and I il and the off control magnets II, I2, and I3, which coact with respect to shiftable armature members I4, I5 and I6 to move contacts Illa, I5a and Ita to either of two limiting positions. We'have indicated in the drawings the off position for the contacts and the on position for the contacts. The stop keys which we employ are set forth more particularly in Letters Patents No. 1,538,949, datedMay 26, 1925, and No. 1,538,950, dated May 26, 1925, on the inventions of Osborne I. Price, although we desire that it be understood that other forms of stop keys may be employed.

We employ in the circuit control system, electromagnetic switches I1, I8, I9, 20, 2I, and 22 of the kind set forthin Letters Patent No. 1,954,758, granted April l0, 1934, on the invention of William H. Reisner. We provide electromagnetic control switches 23, 24, 25, 26, 21, and 28 connected with the electromagnetic switches, as shown. A source of direct current is connected to terminals indicated at 29. In the organ control system, switch I1 :functions as setter No. 1, and Switch I8 functions as setter No. 2. Switch I9 functions as a setter to control switches I1 and I8. Switch 20 functions to control combination No. l, and switch 2| functions to control combination No. 2. Switch 22 functions as a setter for controlling switch 28 which, in turn, controls combination No. l, and also for controlling switch 2|, which in turn, controls combination No. 2. We provide a setter control switch 36, and a switch 3| for selecting combination No. 1 and a switch 32 for selecting combination No. 2.

Electromagnetic control switches 23, 24, 25, 26, 21, and 28 include independent operating windings which will be more fully hereinafter described and which function to shift an armature member to either of two positions. The armature members for the respective switches each carry a contact pin represented in Fig. l at 33, 34, 35, 36, 31, and 38 which, when shifted either to the right or left, establish connection through contact systems 43, 44, 45, 46, 41 and 48, or 53, 54, 55, 56, 51, and 58 respectively.

The construction of the electromagnetic switch of our invention will be more fully understood by reference to Figs. 2-15 in which the mounting for a multiplicity of electromagnetic switches has been illustrated on panel 59. I have designated the electromagnetic switches 23, 24, 25, 26, 21 and i 28, as supported in spaced parallel relation on panel 59 by means of strip members 60 and 6I which conform to the shape of the casings which enclose the electromagnetic switches and are fastened to the panel 59 by suitable screws or other means 62, as shown.

Each electromagnetic switch is enclosed by a cylindrical housing formed from insulating material which we have designated by reference character 63. The housing 63 is provided with a relatively large central opening 64 intermediate the length thereof on one side of the housing and a smaller opening or slot 65 adjacent the opposite side of the housing. The cylindrical housing 63 receives two electromagetic systems 66 and 61. The electromagnetic system 66 is constituted by a winding wound on an insulated spool-like member 68 having an end ange 69 conforming to the internal diameter of the cylindrical housing 63 and an end flange 10 having laterally projecting lugs 1I and 12 thereon for providing terminal supports for the ends of the wires which extend from the winding 66. Each lug 1I and 12 is provided with binding members 1Ia and 12a which secure the ends of the winding 66 to the insulated lugs 1I and 12. The end flange 1U otherwise conforms to the internal diameter of the housing 63, provision being made for the entry of the projecting lugs 1I and 'I2 into a recess 13 cut in the end of the housing 63. In this way, the entire electromagnetic operating unit is maintained ilush with the end of the housing. The end anges 69 and 10 are carried on the central tubular member 14 through which the rod-like armature member 15 extends in a manner free to shift longitudinally within the tubular member 14.

In a similar manner, we arrange the electromagneticoperating system 61 on a tubular member 16 having ilanges 11 and 18 conforming to the internal diameter of the casing 63 and through which the rod-like armature 15 is free to shift. The end flange 18 carries projecting lugs 19 and which enter a recess 8I in the right hand end of housing 63 and serve, by means of binding members 19a and 80a, to support the ends of the wire extending from the winding 61. Very often, these connecting ends are subject to strain and the arrangement which we provide prevents any undue strain while enabling the unit to have the connecting leads to be quickly soldered thereto.

The rod-like armature member 15 which is free to shift within tubular members 14 and 16 is limited in its movement by the abutment of contact pin 33 with the end flanges 69 and 11 or with the limits of the slot 65. As the pin 33 shifts from one limiting position to another, the pin enters between the sets of contact wire elements 43 and 53.

We have shown the contact wire elements 43 and 53 on an enlarged scale in Fig. 13 from which it will be seen that there are three independent wire members 82, 83 and 84, Each wire member is provided with a looped portion which may be secured by means of a rivet or other suitable fastening member to the housing 63. Rivet 85 extends through the loop in wire member 82 and secures the wire member in position, as shown. Rivet 86 extends through the loop in the wire member 83 and through the housing 63 for 82 are shunted. With contact pin 33 shifted to ,A

the right, the shunt is removed from between wire members 82 and 83 and wire members 82 and 84 are shunted, thereby establishing an electrical circuit which may be connected to rivets 81 and 85.

A variety of contact systems may be employed such as illustrated in Figs. 14 and l5. In the arrangement shown in Fig. 14, wire element 88 having a rivet loop 89 therein, coacts with a correspondingly shaped wire element 90 having a rivet loop 90a therein. There is a corresponding contact system constituted by wire element 9| having a loop 92 therein which coacts with wire element 93 having a loop 94 therein. The wire elements 88 and 98 have portions extending parallel to each other forming resilient jaws adapted to receive contact pin 33. The wire elements 9| and 93 have resilient portions extending in parallel relation also adapted to be shunteu by means of contact pin 33 when shifted to the right.

We may find it desirable to employ the contact system illustrated in Fig. l5 in which a resilient wire element 95 is secured to casing 63 by means of a rivet passing through loop 96. two coacting wire elements 91 and 98 having resilient portions extending parallel to the resilient wire element 95. A rivet loop 99 is provided for wire element 91 and a rivet loop IDU is provided for wire element 98 by which the Wire elements There are 'i Cil may be secured to the housing 63. Contact pin 33 is free to bridge the parallel gaps between wire elements 95 and 91 or between wire elements 95 and 98.

In Fig. 12, we have shown diagrammatically the manner in which solenoid windings 66 and 61 are selectively excited from the potential source |0| by shifting selecting switch |02 to either of the two contacts by which windings 66 and 61 are independently and selectively energized. Upon shifting switch |02 to Contact |03, winding 66 is energized which moves armature 15 to the left. Upon shifting switch |02 to contact |04, Winding 61 is energized which shifts armature 'l5 to the right. The contact pin 33 carried by armature 15 serves to control the shunting or unshunting of the contact systems for correspondlngly controlling a variety of electrical circuits.

We have found the construction of electromagnetically operated switch of our invention highly practical and successful in operation and, while` we have described our invention in certain of its preferred embodiments, we desire that it be understood that modifications may be made and we intend no limitations upon our invention other than are imposed by the scope of the appended claims.

What we claim as new and desire to secure by Letters Patent of the United States is as follows:

1. A contact system comprising a single resilient wire-like contact member xed at substantially the middle thereof and having opposite portions thereof extending in a substantially straight line, a pair of resilient wire-like contact members disposed in longitudinal alignment and each mounted adjacent one end thereof and having a portion thereof extending parallel to and spaced from one of the opposite portions of said single contact member, and a contact pin movable to either of two limiting positions in a plane normal to the plane of said contact members for alternately bridging a selected one of said pair of wire-like contact members and said single wirellke member.

2. A contact system comprising a pair of resilient wire-like contact members of substantially U shape disposed in longitudinal alignment in spaced relation with the ends thereof adjacent, means for supporting one pair of the adjacent ends of said contact members, and a contact pin selectively shiftable to either of two limiting positions substantially in the plane of the free arms of said resilient contact members which is normal to the plane of said members.

3. A contact system comprising a pair of resilient wire-like contact members of substantially U shape disposed in iongitudinal alignment in spaced relation with the ends thereof adjacent, means for supporting one pair of the adjacent ends of said contact members, a second pair of contact members of like form and similarly supported and disposed, with the free arms thereof spaced from but parallel to the free arms of the rst pair of resilient contact members and in the same plane, and a contact pin selectively shiftable to either of two limiting positions between the free arms of said contact members in a plane normal to the plane of said U-shaped members.

4. A contact system comprising a pair of resilient wire-like contact members of substantially U shape disposed in longitudinal alignment in spaced relation with the ends thereof adjacent,

means for supporting one pair of the adjacent ROSCOE E. LEHMAN. ARDEN E. ROANE.

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