Патент USA US2134392код для вставки
Oct. 25, 1938. L. J. BARWOOD 2,134,392 FILM CUT-OUT . Filed Aug. 16, 1935 2 Sheets-Sheet l Oct. 25, 1938. ,__ _,_IBARWOQD 2,134,392 FILM CUTLOUT Filed Aug. 16, 1935 "~ 30 79:14 16‘ \\ . I21 U6 :1 f0 14 L EON J. 5/112 WOOD .' U/Wowwiy 2334,3952. Patented Oct. 25, 1938 UNITED STATES PATENT OFFICE 2,134,392 FILM CUT-OUT Leon Joachim Barwood, Cambridge, Mass. Application August 16, 1935, Serial Nb. 36,489 ‘11 Claims. (o1. 200--1l8) ' may be disposed between and separating the The present invention relates to ?lm cut-outs, a new and improved and its object is to provide shall be simple in construction, ?lm cut-out that cheap to manufacture, very e?icient in operation, and exceedingly uniform in its dielectric charac teristics and consequent break- down, voltage. According to the invention disclosed in Letters September 17, 1935, Patent No. 2,014,409, granted are the conducting members 0 f the ?lm cut-outinsu opening of a ring-shaped, disposed in the lating member the friction of the conducting members, so as to contact with their non-bowed-out peripheral portions, thus provid ing an air chamber 18 between the insulating disc in peripheries of or the conducting members against the wall parts the opening being sui?cient to hold the meter together as a unit, particularly if the dia of the conducting members is somewhat larger 15 The wallof the open— than that of the opening. aped to aid this holding ing may be torus-sh 6 and the centrally-bowed-out portion of each disc 2 and 4. As illustrated in Figs. '7 and 8, however, the separating ?lm 6 may be omitted and the contacting, peripheral, inner surfaces of the metal‘ members 2 and 4 may be covered with a suitable insulating coating 23 of an oxide of the metal. may be embodied also in the modification illus trated by Figs. 3 and 4. As is also described in the said Letters Patent, the discs 2 and 4 and the ?lm (-2 may be held together mechanically, as a unit, merely by the peripheral edges of the discs 2 and 4 rrictionally engaging the torus-shaped action. An object of th e prese nt invention is to provide an improved ?lm cut-out of the aboveedescribed greater curvature of or concave wa‘1l22 of the opening of a ring shaped or annular, stiff-?bre, insulating disc 8. According to a feature of the present inven- . with a character provided disclosed in the said letters the torus than is tion, the curvature of the torus-shaped wall 22 is considerablyenlar'ged, so as substantially to Patent. The Letters Patent discloses also a modi? insulating members and cation comprisin g two to improve upon this modi? a further object is cation also. ects Other and further obj will be explained pointed out hereinafter and will be particularly in the appended claims. will be more fully described in The invention the accompanying drawings, in connection with an elevation of a ?lm cut-out which Fig. l. is 4 embodying the present invention; Figs..2 and taken upon larger scales are diametrical sections of Fig. l and 4-4 of Fig. 3, re on the lines 2-44.‘ of the arrows; spectively, looking in the directions Fig. l of a modi?ca Fig. 3 is a view similar to rts ' of 6 are perspectives of pa tion; Figs. 5 and shown in Figs. 3 and 4, Fig. 5 the embodiment away, for clearness; Fig. 7 being partly broken Fig. l of a further modi?ca is a view similar to scale, tion; Fig. 8 is section, but upon a larger taken upon the line 8-—8 of Fig.7, looking in the arrows; and Fig. 9 is a perspec~ directions of the the modi?cation shown in Figs. tive of a part of '1 and 8. As described in the said Letters Patent, cut-out may comprise two preferably circular 2 or disc~shaped, centrally b0wed~out, members such and 4, of conducting ma terial, like metal, from each other in as aluminum, but insulated in Figs. lto 4, desired manner. As illustrated disc-shaped, insulating, thin film 5 a circular or 55 of tissue paper, silk or any other desired ma 19 The oxide-coating modi?cation terial, increase the height of its peripheral edges or projections 24. This may be eiiected in any suit able manner, as by means of a burring roll (not shown) vthat moves along the exterior surfaces of the ring 8, near, and along the circumference of, the opening, to produce a groove 26, thereby upsetting or plowing up or ‘spreading the ma 30 terial of the insulating ring 8 into the opening of the ring. ' - ~ ~ The grooves 26 are not cuts in the material of the ring 8. The plowing up of the material of the ring is, ‘rather, attended by a compression of the material in the grooves 26, thus hardening 35 and strengthening the material in the neighbor hood of the edges or projections 24. The edges or projections’need not, of course, be continuous, they may bedisposed at a plurality of separated positions along the circumference of the opening 40 of the ring 8. The projections 24 thus engage the conducting discs 2 and 1i at their sides, near their peripheries only, more positively than in the said Letters Patent to hold the discs 2 and 4 more effectively in the opening of the ring 8. . As is further described in the said Letters Patent, the ring 8 may be replaced by two ring shaped. or annular, stiff-?bre, insulating discs iii and i2, as shown in Figs. 3 to 8. The discs 50 ill and 12 may each be provided with an annular recess l4 surrounding its opening, the similar openings of the discs iii and i2 being opposed to each other. 'The peripheries of the discs 2 and 4 maybe held together mechanically, as a unit, in these recesses M, the walls‘ of the recesses M 5.5 2 2,134,392 the opening, the projections being alined, the projections on one of the similar members having a recess, and means cooperating with the other 10 in corresponding, alined projections 28 and 30 and through recesses 39 in the insulating ?lm 6. The rivets I6 need not as illustrated, 15 but they may be formed members, integral with, or pressed out from, one of the discs l0 and I2. l0 the opening, having alined the projections being alined and recesses, and means 15 members disposed as a unit between members and the opening. 8. A ?lm cut~out comprising two insulated con ducting members, two similar members each hav- - extending through- corresponding recesses for mechanically holding the similar members together with the 30 the opening with projections between which the conducting members and the means are held to openings opposed to each other and with the con ducting members disposed as a unit between the similar members and the opening. 9. A ?lm cut-out comprising two conducting 30 members, an insulating ?lm disposed between and separating the conducting members, two sim~ ilar‘insulating members each having a similar 35' as to extend positions along its exterior surfaces near the 40 45 gether as a unit. 11. A ?lm cut-out comprising two conducting 4. A ?lm cut-out comprising two conducting 50 insulating ?lm disposed between and separating the conducting members, and a member having an opening in which the con ducting and the insulating members are disposed 12. A ?lm cut-out comprising two insulated conducting members, two similar members each 56 having an opening and an annular recess sur gether as a unit in the opening. 5. A ?lm cut-out comprising two insulated con ducting members, two similar members each hav with the other member and disposed in the recess for mechanically holding the ‘ ' 65 ing, the conducting members having recesses for receiving the projections. said one member. 6. A ?lm cut-out comprising two insulated con~ ducting members, two similar members each hav 75 ing an opening and a projection extending into 13. A method of making an insulating ring for a ?lm cut-out comprising plowing up the mate rial of the insulating ring into the opening of the 70 ring. 14. A method or making a ?lm cut-out com prising plowing up the material of an insulating ring into the opening of the ring at a plurality 75 3 2,134,392 of positions along its exterior surfaces near the opening to provide the wall of the opening with projections, and inserting insulated conducting members in the ring to cause them to be held together as a unit in the ring by the projections. UK 15. A ?lm cut-out comprising two insulated conducting members, and insulating means en gaging the conducting members at their edges, 10 and also at their sides near their peripheries only, for holding the conducting members and the insulating means together as a unit. 16. A film cut~out comprising two conducting members, an insulating ?lm disposed between and separating the conducting members, and means engaging the conducting members at their edges and also at their sides near the peripheries only, for holding the conducting members and the insulating ?lm together as a unit. 1'7. An insulating ring for a ?lm cut-out, the material of the ring being displaced so as to extend into the opening at a plurality of posi tions along its exterior surfaces near the open ing to provide the wall of the opening with pro jections between which insulated conducting 10 members may be held together as a unit in the I‘ll'lg. LEON J. BARWOOD.