Патент USA US2411447код для вставки
Nov. 19, 1946. J, w, MCCLAIN 2,411,447 SHOCKPROOF SWITCH Filed Sept. 2, 1944 Irwventor: Joseph W. McClain, . y / His Attorney. Patented Nov. 19, 1946 2,411,447 UNITED STATES PATENT OFFICE ZAllfid'l SHDFJKPRQQF SVIIT CH Joseph W. McClain, Schenectady, N. Y., assignor to General Electric Company, a corporation of New York Application September 2, 1944, Serial No. 552,406 2 Claims. I 2 My invention relates to shockproof switches, more particularly to shockproof electromagnet ically simple,operated reliable switches, and inexpensive and hasswitch for its inobject which magnetic portion 4 is pulled into the coil and the disc thereby rotated substantially 90 degrees in portion made of magnetic material, the remainder of the strip and the disc being made of non-mag clockwise to its attracted position, the pivot l2, a clockwise direction, as seen in the drawing. Preferably, as shown, the movable part of the the moving parts are statically balanced so as to ,, switch 6 is mounted on one end of a bell crank Ill, the opposite end of which is connected by means be free from the effects of shocks. of a link H to a pivot l2 secured to the ‘disc I a In carrying out my invention in one form, I pro vide a disc shaped member mounted for rotation suitable distance from the pivot 5. As shown, the pivot I2 is in such a position that it lies on a on a central axis about which the disc is statically balanced. One half of the disc is in the form of lo radius extending substantially at right angles with a peripheral strip or bar which has at one end a the link ll. Therefore, when the disc is rotated in moving through a 90-degree angle, moves downward below the pivot shaft 5 into a dead cen netic material. I further provide an operating coil surrounding the strip which, when energized, 15 ter position, i. e. parallel with a radius of the disc, with respect to any force applied by the link i l to pulls the magnetic strip portion into an attracted position whereby the disc is rotated and switch the disc and switch. This rotation of the disc, it will be observed, moves the switch to its closed means connected to the disc is moved between its operating positions. circuit position. Thus the disc itself is not only ‘ statically balanced about its pivot shaft 5, and For a more complete understanding of my in~ therefore free from the e?ects of shocks, but the vention, reference should be had to the accom panying drawing, the single ?gure of which is a disc is not affected in terms of rotation by any diagrammatic representation of an electric switch shock or other force applied to the disc by the embodying my invention. 1 switch. This is because any such force is applied Referring to the drawing, in one form or" my ~ directly to the shaft 5 without any component invention I provide a circular or disc-like mem producing rotation of the disc in either direction. her I which may be formed or cut from a plate If desired, suitable stop means may be provided of non-magnetic material, such as brass or a for limiting the rotation of the disc in each direc phenolic compound. One half of the disc l is tion, especially stop means for positioning the vdisc formed or cut away to leave a large aperture 2 30 angularly in its attracted position so that the link and a semicircular peripheral strip or bar 3. The ll extends along a radius of the disc. As shown, strip 3, furthermore, is provided at one end with ‘the inner side I3 serves as a stop by engagement a portion 4 made of magnetic material which ex with the upper end of the coil to limit the coun tends throughout substantially one half the terclockwise rotation of the disc by the biasing length of the strip. 35 spring 9, while the similar inner side M of the The disc I is mounted for rotation on a pivot disc engages the lower end of the coil to limit the shaft 5 at its center, about which pivot shaft 5 the clockwise rotation of the disc by the coil. disc is statically balanced. This static balance, While I have shown a particular embodiment for example, may be obtained by adding suitable ‘of my invention, it will be understood, of course, material if required to the strip 3 to offset the 40 that I do not wish to be limited thereto since many greater weight of the opposite solid half of the modi?cations may be made, and I therefore con disc. template by the appended claims to cover any such To e?ect the rotation of the disc through a sub modi?cations as fall within the true spirit and stantially QO-degree angle thereby to operate an scope of my invention. electric switch 6, I provide a stationary operating 45 1. A shockproof switch comprising a disc mem coil 1 which surrounds the strip 3. Preferably, ber made of non-magnetic material provided the coil is provided with a central bore 8 which is with a substantially semi-circular strip de?ning large enough to accommodate substantially one one half of the disc member, a portion of said half of the length of the strip 3, the coil having strip being made of magnetic material, a central a length sufficient to extend over substantially 50 pivot for said disc member about which said disc one half of the length of the strip 3. By means member is statically balanced, a coil surround of suitable biasing means, such as a spring 9, the ing said strip, means biasing said disc member to disc I is biased to an angular position in which a position in which the non-magnetic portion of the non-magnetic portion of the strip 3 extends said strip extends through said coil whereby through the coil. When the coil is energized, the 55 when said coil is energized said disc member is 2,411,447 rotated substantially 90 degrees thereby to bring said magnetic portion of said strip into an at tracted position with respect to said coil, circuit control means, a link connecting said circuit con trol means with said disc member, said link being connected to a pivot on said disc member in such position that when said disc member is in said attracted position said link lies along a radius of said disc member whereby a force applied by said link to said disc member is ine?ective to produce rotation of said disc member. 2. A shockproof switch comprising a disc mem ber made of non-magnetic material having a substantially solid semi-circular portion and a peripheral strip de?ning the opposite half of the disc, substantially one half of said strip being made of magnetic material, a central pivot for said disc about which said disc is statically bal 4 anced, a coil surrounding said strip and coex tensive with substantially one half of the length of said strip, means biasing said disc to a posi tion ‘in which said non-magnetic half of said strip extends through said ‘coil whereby when said coil is energized said disc is rotated substan tially 90 degrees thereby to bring said magnetic portion of said strip into an attracted position inside of said coil, circuit control means, a link connecting said circuit control means with said disc, said link being connected to a pivot on said disc in such position that when said disc is in said attracted position said link lies along a radius of said disc whereby a force applied by said link to said disc member is ineffective to produce rotation of said disc member. JOSEPH W. MCCLAIN.