Патент USA US2116658код для вставки
May 10, 1938. H, J_ L, FRANK 2,ll6,658 SWITCH CABINET ' Filed Jan. 20, 1956 5 Sheets-Sheet 1 INVENTOR. M 0%’. 33M 21 BY .AM_‘ ATTORNEY. May 10, 1938. H. J. L. FRANK 2,116,658 SWITCH CABINET‘ Filed Jan. 20, 1956 5 Sheets-Sheet 2 INVENTOR. _P7.7 J wwwh ATTORNEY‘ ‘ May‘lo, 1938. H. J. L. FRANK 2,116,658 SWITCH CABINET Filed Jan. 20, 19:56 T 42? I __;f 7 _P__ 5 Sheets-Sheet 5 _ 5o 47 429 My] INVENTOR. BY ATTORNEY. May 10, 1938. H. J. L. FRANK 2,116,658 I SWITCH CABINET Filed Jan. 20, 1936 swn'cH SWITCH I It. 5 Sheets-Sheet 4 INVENTOR. ‘ . _ J’m?lfd BY JOM . ‘ - . ATTORNEY. May 10, 1938. H, _|_ |__ FRANK 2,116,658 SWITCH CABINET Filed Jan. 20, 1936 5 Sheets-Sheet 5 W23?” ’‘ ORNEY. MM my 10.1w _. ‘ ' 2,116,658 I J UNITED STATES PATENT OFFICE ‘ , I msf'?cfsl‘fi’fi. m. Apliucl?nn _Jamlary 2., 1936, Serial N0. 59,875 9 Clllllll. (Cl. 200-114) This applicationvrelates to fused switch cabiFig. 8 is a back elevation view of the pan nets, to panels thereof made up of two or more ~ per se; , fused switches, and to fused switches generally ' of. the character disclosed in Reissue Patent No. 5 17,910 of April 2, 1935 vgranted to Harrison J. L. Frank. _ ' ' ' Fig. 9 is a section on line 2-9, Fig. 8; Figs. 10 and 11 show di?erent uses of the panel; se from the back thereof; A fused switch cabinet includes a sheet metal box containing a panel of two or more fused switches, the panel comprising a duplex recepta1'0 cle base, each ‘receptacle of which receives a fuse carrier plug or head, each receptacle and its head comprising a switch. ' Figs. 13-16 are perspective views of conducting parts of the panel; ' " ‘ Fig. 1'7 is a section on line I‘l-i‘l, Fig. 8. Referring to the drawings, it will be seen that 10 the fused switch cabinet of this application in cludes a box 5 containing a panel comprising a One invention hereof relates to a novel manner of mounting the panel base in the box. 15 Another invention relates to means preventing interchange of the heads in the panel receptacles; unitary block 6 formed with two receptacles dis posed side by side, each receptacle being cup shaped and being adapted to receive a fuse carrier 16 or head ‘I. were such means omitted, a head carrying a The panel may be mounted in the cabinet in a large capacity fuse might easily be plugged into convenient and facile manner. It will be observed a receptacle controlling a circuit whose maximum 20 load is to be that of a smaller capacity fuse, with consequent deleterious results. _ Fig. 121s a perspective view of the‘panel per g - that the rear wall of the box is provided with tongues I and a screw 9, and that the rear wall so of the panel is provided with ears l0 and a slot Another invention relates to the provision, in the heads, of slots on opposite sides of end ribs, which slots provide vents for the interiors of the 25 switches, ways for test leads, and adequate clearance between switch parts of opposite polarity. ‘Still another invention'relates to the provision, in the heads, of weakened portions or "knockouts” which may beknocked out if desired to pro30 vide vents for the interiors of the switches and windows through which it may be determined by observation alone whether or not fuses are disposed in the switches. ~ Still another invention relatesto features of 35 mounting ‘for conductor parts of the switches whereby economy of manufacture is enhanced. il. When a panel is to be mounted, the screw 9 is threaded out to a considerable extent and the. panel is manipulated so that the screw 9 is re ceived in the slot ii of the panel. Then the g5 panel is pushed up as far as it will go until the ears I0 clear the tongues I, after which the panel is pushed against the back of the box so that the ears i0 may be received behind the tongues I, whereupon'the panel is permitted to drop slightly 30 and the screw 9 is tightened up. Surrounding thepanel is .a masking plate I‘ of conventional construction and adapted to close the front of the box is a hinge cover i5. In back of slots i8 formed in the back of each 35 receptacle, and thus accessible from the front of. Still another feature relates to novel arrange- . the receptacle, are disposed receptacle contacts ments of conductor parts of'the switches whereby ?exibility of use of the panel is enhanced. 40 For an understanding of the parts disclosed in the appended drawings, reference should be had ' to thefollowing speci?cation. In the drawings, _ ' ’ - Fig. 1 is a front elevation view of a switch cabie 20. For mating with the receptacle contacts, there are provided prongs 2| forming terminals of J-shaped contact straps 22 of copper or the 40 like, whose bights are secured to the heads ‘I by the spun-over ends of embedded rivets 23, there being spring clips 24 between the bights and the heads to help secure in place cartridge fuses - 45 net containing a panel with two switches, one of theheads being, removed for purposes of exposing the base of the switch including such head; Fig.2 isa fragmentary section view of a switch; 25 connecting aligned contacts 22, the ferrules of 45 the fuses being received within the bights and the spring clips of these contacts. On the fronts of the‘ heads are handles in the Fig. 2a is a side view of a head, per se; , Fig. 3 is. a fragmentary back view of a head form of pullrings 21 secured to the heads by cot ter straps 28, which go through the heads and 50 50 per se; > , I _ Fig. 4 is a fragmentary enlarged front view; Figs. 5 and 6 are side and front views, relating to mounting means for the panel; , 55 Fig. 'I is a detail view of a fuse socket; terminate in portions disposed in wells 2! in back of the heads. When a‘ switch is to be closed, a fuse carrying head is plugged into a receptacle; the contacts 22,, connected by fuses 25, have their prongs Ii 65 2 2,116,658 fitted through the slots IQ of the receptacles to engage and make contact with the receptacle place and sliding the connector end thereof contacts 20 in back of these slots l8. When a switch is to bev left open, the head is removed and reversed 180° and reinserted into the recep tacle, but with the fuses and contacts exposed through an end slot of the block, and each unit is securely mounted on insulation ledges 48-41, formed integral with the block 6, by a single screw 45 or 45a, which features enhance the simplicity and economy of manufacture of the and projecting towards the front of the cabinet. Each receptacle is provided in its interior with panel. I back wall slots 30 and receptacle end wall slots The panels are so constructed that various manners of using the switches thereof may be at- ‘ 10 3|. Cooperating with the slots 30-3l are ribs ' 32-33 projecting respectively from the back and tained. For example, by connecting straps I. 42d-42g through an insulated conductor 50 from each end wall of the head, the ribs 32-43 ?tting into the slots 30-—3l respectively. These ribs function not only as guiding and. barrier ribs, 15 but also, by virtue of the fact that the ribs and whose ends are hooked around screws 5| mount slots of one switch are of slightly different con figuration from those of its neighboring switch, serve to prevent improper interchange of heads. It will be observed that the end slots and end 20 ribs of one switch are deep and narrow, whereas the end slots and end ribs of the adjacent switch are shallow and wide; a head having shallow wide ribs cannot fit into a receptacle formed with deep-narrow. slots, and vice versa, with the result 25 that a head cannot be plugged into a receptacle other than the one for which it is intended. For reinforcing and barrier continuing pur poses, the ribs 32 of a head ‘are connected by the walls of the well 29 receiving the end of the cot 30 ter strap. Adjacent and separated by each end rib 33 are slots 36. The slots provide vents from the inte rior of the switches to outside the same; the slots provide ways for test leads whose terminals may 35 be caused to engage contact parts of the heads; and the slots, together with the barriers formed by the end ribs 33 therebetween, cooperate to pro vide greater creepage paths between the opposite polarity contacts of the heads than would be the case were the slots not present. ing the conductor 50 on straps 42d-42a, and by interconnecting straps 43e-43j through a con ductor 52 held in place by the threading of cer ll tain screws 45a into tapped holes thereof, all as illustrated in Fig. 8, it is possible to connect out side lines to the panel to obtain two uses of the panel parts, as shown in Figs. 10 and 11, which differ from uses obtainable when these parts 55 and 52 are omitted. In Fig. 10 there is shown an arrangement wherein branch circuit conductors C53, C54, D53, D54 are connected to socket shells 53 in a suitable manner, as by means of socket shell connecting screws 55 (Fig. 7), wherein branch circuit con ductors C53, D56 are connected in circuit by con nectors C44, D44, wherein branch circuit conduc tors are connected in circuit by connectors A44, wherein main feed conductors are connected in circuit by connectors B44, and wherein fuses in the socket shells connect screws 45a--55 in pairs; so connected, the panel may be used with switch I as a main switch and with switch II as a branch switch, the main switch I controlling the connec tion between the main feed circuit and all other circuits and with the branch switch II control ling only the branch circuit A. If, as is shown in Fig. 11, the conductors C55, D56 are the main feed conductors, and all other 40 In. the center of each head and on opposite conductors are branch conductors, switch I will sides of the cotter strap 28 which mounts the control branch circuit conductors B and switch pull ring handle of each head are weakened por II will control branch circuit conductors 'A, and tions or knock-outs 31. The opening created by branch circuit conductors C53, C54, D53, D54 will removing a knock-out will provide a large ventv be permanently connected to the feed conductors 45 for the interior of the switch and in addition will and be independent of the switches I and II. provide a window through which may be viewed Other uses may be attained by ‘varying the con the. interior of the switch so that it can be de nections, with the parts arranged as shown, and termined by mere observation whether or not still other uses ‘may be attained by varying the 50 certain of the contacts are connected by fuses 25. arrangements of the parts 50-52 and the con The switches are connected in circuit through fuses disposed in socket shells 38 of conducting nections. I claim: . material disposed in depressions or sockets 39; 1. A plug and receptacle switch comprising a the wall of each socket hugs its shell closely ex .55 cept where shells are adjacent, in which case the receptacle having adjacent opposite polarity con walls are cut away, as at 40, between points X, tacts, a plug adapted to be disposed therein and 55 having on its back surface back projecting con with the result that the requisite minimum creep age path between shells of opposite polarity is tacts mating with the receptacle contacts, and preserved even though the eenter-to-center dis ‘ having on its end wall end slots aligned with the 60 tance between shells is below what was hitherto plug contacts to provide vents for the interior of considered a safe minimum. The receptacle contacts 20 are formed as lugs of straps 42—-42g, 42'-—42y’ welded to each other and transversely directed from straps 43--43g; 65 certain of these straps 43-43g are apertured to receive axial shanks of terminal connectors 44 having tapped holes receiving screws 45; others of these straps 43—43g, which .do not have ‘con nectors 44 associated therewith, have tapped holes .70 receiving screws 45a whose heads form center or tip contacts for the socket shells 38; it will be observed that each unit comprising a receptacle contact set, a strap, and a terminal connector,’ is mountable on the block merely by placing the 75 unit against the back of the block in a proper the receptacle and ways to the plug contacts for 60 test leads, and also to provide an extraordinary creepage path on the end of the plug between the plug contacts. 2. A cup shaped insulating block having a slot in its bottom wall, and a slot in its end wall, 65 and an end ledge, a conductor strap disposed in the end slot, and having a portion resting on the ledge, and a portion disposed against the under surface of the block, a conductor terminal con nector secured to the portion of the strap disposed on the ledge, a contact secured to the portion of the strap disposed against the under surface of the block and accessible for receiving a prong to the front of the block through the block bottom 75 9,116,658 wall slot and a single screw for securing the strap, its connectors, and its contact in place. 3. A duplex receptacle block having eight con tacts arranged in two groups each of which in cludes two pairs, two switch plugs, each having a group of two pairs of contacts, the arrangement providing two relatively independent switches each controlling one group comprising two pairs of contacts, two in each pair, the contacts being arranged with four at one end of the block and four at another end of the block, there being one contact of each pair in each line of four, the con-, tacts of one line of four being electrically inde pendent of each other and each having a conduc 15 tor terminal connector, the outside contacts of the other line of four being electrically intercon nected and the inside contacts of such other line of four being electrically interconnected, with the inside contacts being electrically independent of the outside pair, a fuse near each contact of the second line of four and connected at one end to one contact of that line of four and connected at its other end to a conductor terminal, and two conductor terminals, other than the four con nected to the four fuses, with one connected to one of an inside pair of contacts and with the other connected to one of an outside pair of con tacts. 4. In a receptacle, a plug disposed therein and 80 having conducting parts on its back and having, on’its end, slots alined with the conducting parts and running from front to back of the plug pro viding access to the conducting parts from the front of the plug and providing an extraordinary 36 creepage path on the end of the plug between the conducting parts. , ‘ 5. A plug and receptacle switch comprising a cup shaped receptacle normally closed by the plug and containing a fuse, and a knockout on 40 the plug front alined with the fuse which may be knocked out to provide a vent and an observation hole or window for the receptacle. 6. A cup shaped insulation block having a slot in its bottom wall, and a slot in its end wall, and 46 an end ledge, a conductor strap disposed in the end slot, and having a portion resting on the 3 tion of the strap disposed against the under sur face of the block and accessible for receiving 8. prong to the front of the block through the block bottom wall slot and a single screw for securing the strap, its connectors, and its contact in place, a plug fuse socket shell in the block, and a screw passing through the bottom of the shell and the block and threaded into the strap. 7. A cup shaped insulation block having a slot in its bottom,‘ wall, and a slot in its end wall, 10 and an end ledge, a conductor strap disposed in the end slot, and having a portion resting on the ledge, and a portion disposed against the under surface of the block, a conductor terminal con nector secured to the portion of the strap dis posed on the ledge, a contact secured to the por tion of the strap disposed against the under sur face of the block and accessible for receiving a prong to the front of the block through the block bottom wall slot and a single screw for securing the strap, its connectors, and its contact in place, a plug fuse socket shell in the block, and a screw passing through the bottom of the shell and the block and threaded into the strap, the part of the screw within the shell providing a tip contact in 25 the shell of the same polarity as the strap. 8. A cup shaped insulation block having a slot in its bottom wall, a conductor strap having a portion disposed against the under surface of the block, a contact secured to the portion of the 30 strap disposed against the under surface of the block and accessible for receiving a prong to the front of the block through the block bottom wall slot, a plug fuse socket shell in the block, and a screw passing through the bottom of the shell 35 and the block and threaded into the strap. 9. A cup shaped insulation block having a slot in its bottom wall, a conductor strap having a portion disposed against the under surface of the block, a contact secured to the portion of the 40 strap disposed against the under surface of the block and accessible for receiving a prong to the front of the block through the block bottom wall slot, a plug fuse socket shell in the block, and a screw passing through the bottom of the shell and 45 the block and threaded into the strap, the part ledge, and a portion disposed against the under of the screw within the shell providing a tip con- ' surface of the block, a conductor terminal con tact in the shell of the same polarity as the strap. nector secured to the portion of the strap dis posed on the ledge, a contact secured to the por ' HARRISON J. L. FRANK.