US3805206A

US3805206A - Switch

Info

Publication number: US3805206A
Application number: US00369566A
Authority: US
Inventors: H Ege
Original assignee: UNDERWRITERS SAFETY DEVICE Co
Current assignee: McGraw Edison Co; UNDERWRITERS SAFETY DEVICE Co
Priority date: 1973-06-13
Filing date: 1973-06-13
Publication date: 1974-04-16
Anticipated expiration: 1991-04-16
Also published as: CA1024568A

Abstract

An economical switch utilizing a triple function extrusion which is preferably immovably confined in an insulating housing is disclosed. The extrusion provides connector, terminal, and contact functions. Two preferred embodiments are disclosed. One disclosed embodiment is a switch comprising a pair of contactterminals which are secured with respect to a base and which are physically separated by an insulating barrier fixed to said base and which are electrically connected by a straddle-saddle connecting element comprising an elongated conductor having at the ends thereof a pair of electrically connecting saddle portions extending downwardly on either side of said barrier, and contacting the respective contact-terminals, said end saddles being electrically connected by a connecting base portion thereof which bridges said barrier. In a second embodiment, a switch in accordance with this invention is adapted as part of a cartridge-fuse panel.

Description

United States Patent [191 Ege SWITCH Inventor: Hans Ege, Des Plaines, Ill.

Underwriters Safety Device Co., Chicago, 111.

Filed: June 13, 1973 Appl. No.: 369,566

' Assignee:

References Cited UNITED STATES PATENTS 9/1938 Frank et a1. 200/162 1/1940 Jirka et al.

9/1971 Stanback 339/272 R 1/1918 Platt 200/162 Primary Examiner-David Smith, Jr.

Attorney, Agent, or Firm-Lockwood, Dewey, Zickert & Alex [451 Apr. 16, 1974 [5 7] ABSTRACT I An economical switch utilizing a triple function extruferred embodiments are disclosed. One disclosed embodiment is a switch comprising a pair of contactterminals which are secured with respect to a base and which are physically separated by an insulating barrier fixed to said base and which are electrically connected by a straddle-saddle connecting element comprising an elongated conductor having at the ends thereof a pair of electrically connecting saddle portions extending downwardly on either side of said barrier, and contacting the respective contact-terminals, said end sad dles being electrically connected by a connecting base portion thereof which bridges said barrier.

In a second embodiment, a switch in accordance with this invention is adapted as part of' a cartridge-fuse panel.

10 Claims, 8 Drawing Figures 4 6 -13 f f I! 15 a PATENTEDAPR 16 law- 3; 805; 206

' SHEET 1 OF. 2

SWITCH This invention relates to an electrical switch or circuit interrupter for interrupting appreciable amperage currents.

It is an object of the present invention to provide such a switch which can be easily'and economically manufactured, and which can be assembled with a minimum of labor expense.

It is a further object of the present invention to provide a switch for interrupting appreciable amperage current in which the switch has major electrically conducting components which can be manufactured from extrusions, and has major insulating components which can be manufactured by injection molding.

It is another object of the preferred embodiment of the present invention to provide a switch for interrupting appreciable amperable current in which a minimum of fastening of electrically-conducting components to the insulating components is required.

It is another object of the present invention to provide a switch for interrupting appreciable amperage current in which the supply-energized components can be hidden, and in which all of the circuit-closing element is completely deenergized when the switch is open.

It is an additional object of the present invention to provide a switch for interrupting appreciable amperage current and which is particularly adaptable for use in connection with fuse panels.

It is an additional object of a preferred embodiment of the present invention to provide a fuse panel having associated therewith an easily and economically assembled switch which is particularly suitable for interruptin'g appreciable amperage current, and in which the supply energized components are hidden, and in which fuse panel in which the cartridge-fuse clips at both ends of the cartridge fuse can be de-energized prior to the changing of the cartridge fuse.

These and other objects which will be apparent hereinafter are all achieved in accordance with the present invention which is described herein in connection with two particularly preferred embodiments, and with the aid of the accompanying drawings, in which:

FIG. 1 is a top plan view of a switch assembly in accordance with the present invention.

FIG. 2 is a partially cutaway top plan view of the switch assembly shown in FIG. 1 with the circuit closer removed.

FIG. 3 is a corss-sectional elevational view taken approximately along the line 3-3 of FIG. 1'.

FIG. 4 is a partially cutaway side taken approximately along the line 44 of FIG. 1.

FIG. 5 is a cross-sectional view taken approximately along the line 55 of FIG. 1.

FIGS. 6, 7, and 8 relate to an alternative embodiment of the present invention.

FIG. 6 is a top plan fragmentary view of an embodiment in accordance with the present invention.

FIG. 7 is a cross-sectional side elevational fragmentary view taken approximately along the broken line 77 of FIG. 6.

FIG. 8 is a top sectional fragmentary view taken approximately along the line 8-8 of FIG. 7.

Two preferred embodiments are illustrated in the accompanying drawings, the first embodiment being described with the aid of FIGS. 1 through 5, and a second embodiment being described with the aid of FIGS. 6 through 8. In the embodiment shown in FIGS. 1 through 5, a plurality of the switch assemblies 10, in accordance with the present invention, are provided for simultaneous interrupting three separate circuits. In the alternative embodiment shown in FIGS. 6 through 8, a single switch assembly 12, in accordance with this invention, is shown in a fuse panel assembly generally indicated by the numeral 14 in which the switch interrupts the supply to three fused circuits. These two embodiments will be discussed in detail hereinafter for illustrative purposes only, and the invention is not to be construed to be unduly limited thereto.

Switch assembly 10 includes three cooperating blocks of insulating material namely, insert block 16, housing block 18, and base block 20. Base 20 is secured to housing block 18 by means of suitable fasteners 22 passing between base 20 and housing 22 from a recess 24, for example, in base 20 from the bottom of base block 20 making it impossible to expose internal elements while assembly 10 is mounted e.g. by passing conventional mounting fasteners (not shown) through holes 21 in base block 20.

As indicated above, switch assembly 10 is designed to provide a switch function in three separate circuits simultaneously, and it is to be understood that the component elements which are provided in connection with each of the three separate circuits are identical. Hence to avoid undue clutter of reference numerals in the drawings, those components which are provided in connection with one of the circuits will be discussed in detail and it is to be understood that the switch components in the other two circuits are identical.

Electrically conducting portions of the switch assembly 10 includes an input lead 30 secured in first connector-terminal block 32 which is secured in a chamber 34 formed between base block 20 and housing block 18. An integral straddle-saddle switch 40 is secured to insert block 16. A second conector-terminal block 42 is retained in a second chamber 44 which is a mirror image of chamber 34. Second electrical lead 46 is received and secured in terminal connector 42. Respective set screws 50, 52

bind wires

30, 46, respectively, in

connectorterminals

32, 42, respectively. It is to be understood that, in the embodiment illustrated in FIGS. 1 through 5 herein, the connector-

terminals

32, 42 are identical and provide a triplicate function because of the arrangement in accordance with this invention namely they are connectors, terminals and switch contacts all in one

piece

32, 42. They are preferably manufactured from an extrusion having the general cross-section which is illustrated in FIG. 3, namely, a cross-section such that the exterior configuration of the connector-

terminal

32, 42 is generally rectangular with respect to exterior configuration, and has a circular or other passageway 55 through the mid-portion. Thus, the individual terminal-

connectors

32,42 constitute cut-off segments of an elongated extrusion having the cross-section seen in FIG. 3, and each of the segments are drilled transversely to the direction of the interior passageway 55 and are tapped to receive respective set screws 50, 52, for binding

respective wires

30, 46. Set screws 50, 52 are received in respective passageways 53, 54, and are adjusted by a driver, for example.

It is noted that connector-

terminals

32, 42 are closely received above and below (see FIG. 3) in their

respective chambers

34, 44. It is also noted that chamber 34 is formed by two opposing recesses, namely, recess 60 in housing block 18, and recess 62 in base block 20. It is further noted that recess 62 is so dimensioned as to snugly receive respective connector-terminal 32 therein, and snugly secure connector-terminal 32 above and below in chamber 34, so that connectorterminal 32 is substantially immovable in chamber 34. Nonetheless (see FIG. 3) the dimensions of recess 60 are such that substantial gaps 66 exist between the sides of connector-terminal 32 and recess walls 60. Chambers 34 and 44 are separated by barrier wall 70 at the innermost end thereof. The tops of

connectors

32, 42 bear against an upper wall 72, 72', respectively.

Referring now to FIGS. 1 and 2, insulator insert block 16 has an operator handle 38 secured thereto on an exposed portion thereof, and on the opposite side therof has a plurality of straddle-saddle switch circuit closers 40 secured thereto by suitable fasteners 74. Block 16 is received in housing block 18 in recess 80. In bottom 84 of recess 80, a plurality of

elongated passageways

86, 86, are provided, and these extend into the

respective chambers

34, 44 below and are positioned to be vertically aligned with the gaps 66 at either side of the respective connector-

terminals

32, 42, respectively.

Referring now to FIG. 4, the ends of straddle-saddle circuit closer 40 have the cross-section of an inverted U, and comprises blades 90, extending from the sides of elongated base 92. Blades 92 are so sized, aligned, and positioned as to be insertable in respective openings 86 when insert block 16 is seated in recess 80 as shown in FIG. 3. Blades 90 pass into gap 60 at either side of the respective connector-

terminals

32, 42, and the spacing between each set of blades 90 is such as to snugly engage the respective connector-

terminal blocks

32, 42 therebetween for secure electrical contact. The

individual blades

90, 91 shown herein are shown split whereby each blade has a plurality of strips thereby assuring more actual contact area for electrical connection.

straddle-saddle switch circuit closer 40 comprises two sets of

blades

90, 91. Blades 90 with base 92 has the cross-sectional configurationof a saddle, or of an inverted U, and blades 91 with base 92 also provide a cross-sectional configuration of a saddle, or of an inverted U. Blades 90 are so positioned as to pass through respective openings 86 into the gaps 66 at either side of connector-terminal 32 snugly engaging said connector-terminal 32, and respective blades 91 are so positioned as to pass through opposing openings 86 into the gaps 66', 66 and snugly engage connector-terminal 42 therebetween. It is noted (see FIG. that blades 90 pass through respective openings 86 on the other side of barrier 70. However, straddle-saddle switch circuit closer 40 includes base portion 92 thereof which extends between respective sets of

blades

90, 91. Thus, when the insert block 16 is seated in recess 80 connector blocks 32, 42 are electrically connected through blades 90, bridging base portion 92, and opposing blades 91.

It will be appreciated that barrier 70 is essential, in accordance with the present invention, in that it assures that

wires

30, 46, respectively, passing through central passageways 55 of the connector-

terminals

32, 42 cannot be inserted a sufficient distance to contact the other connector-terminals, thus short-circuiting the switch assembly at that point. Thus, blades 90, with base 92 can be regarded as a saddle closely seated on bottom 84 of recess and closely engaging sides of a connector-terminal 32, and blades 91, in cooperation with base 92 can be regarded as a second saddle seated on bottom 84 and closely engaging either side of connector-terminal 42. These saddles are seated on their

respective connectors

32, 42 on opposite sides of barrier 70, but nonetheless are electrically connected due to the fact that base portion 92 of straddle-saddle switch connector 40 is integral with and extends between both sets of

blades

90,91.

In the preferred embodiment illustrated in FIGS. 1 through 5, connector-

terminals

32, 42 are aligned along a line, and passageways 55, 55' in

connectorterminals

32, 42 are aligned so that their axes or directions fall along a common line; barrier 70 is transverse to that axis or direction, and circuit closer 40 is oriented so that the line or direction between its saddles passes between the respective legs of each saddle and is positioned to be parallel to the direction of the passageways 55, 55'. It will be appreciated that the assem' bly of the housing block 18 and base block 18 is utterly simple, requiring no fastening of any of the

electrically conducting elements

32, 42 to the

insulators

18 or 20.

In assembly, connector-terminals 32, 42 (which are all identical) are seated in respective recesses 62 with set screws 50, 52 positioned at the outside, and housing block 18 is seated thereover. This assures instant positioning of all elements within block 18, the

blocks

18, 20 are then held together and inverted and fasteners 22 driven home. Thus, conductor-

terminals

32, 42 are maintained in operating position, even against pulling of

wires

30, 46 or of blade sets 90, 91, even though no fastener directly secures

blocks

32, 42 to

blocks

18,20.

Referring now to FIGS. 6 through 8, another embodiment of the invention is illustrated. However, it will be appreciated from a consideration of the foregoing, and from the following description, that these embodiments have certain elements in common. The elements described in connection with FIGS. 6 through 8 will be referred to by numbers in the one hundred series, the second and third digits of which will be the same number used to refer to the similar part or structure in FIGS. 1 through 5. Switch assembly 12 is shown in conjunction with cartridge fuse panel 14 which is shown in fragment form in FIGS. 6 through 8. Assembly 14 includes insert block 116, housing block 118 and base block 120, which are analogous to

blocks

16, 18 and 20 in FIGS. 1 through 5. Housing block 118 is secured to base block 120 by suitable fasteners (not shown) in the same manner as shown in FIG. 3.

Base block 120 also constitutes a mounting plate for a plurality of catridge-fuse receiving clips 126, 126. It is to be understood that base plate 120 is shown in fractional view, in FIGS. 6 through 8, and it is to be understood that other conventional fuse cartridge-receiving clips, (not shown) are aligned with

clips

126, 126 to cooperate with

clips

126, 126 for the purpose of operatively receiving respective cartridge fuses 128 therebetween, and that the conventional cartridge fusereceiving clips which are not shown are, in turn, connected to respective other electrical circuits (not shown because conventional). Assembly 14 includes electrical supply lead 130 which is secured to connector-terminal 132 by set screw 150. Connector-terminal 132 is identical in every respect to

connectors

32, 42 which have been described in detail hereinbefore, and will not be described further. Connector 132 is received in a chamber 134' formed by opposing recesses 160 in housing block 1 l8, and recess 162 in base block 120. The relative configuration of recess 134 and connector-terminal 132 is identical to the relative sizing and structural relationships discussed hereinbefore in connection with connector-terminals 132, and recess 34, whereby a

gap

166, 166 exists on either side of connector-terminal 132.

Elongated openings

186, 186 in the top of housing block 118 are positioned to be aligned above gaps 166, 166' and pass through block 118 into chamber 134. Barrier 170 extends downwardly to base 120 defining one wall of the recess 134.

straddle-saddle switch circuit closer 140 is substantially identical to straddle-saddle switch circuit closer described in detail hereinbefore, and the description will not be repeated. Suffice it to say that switch connector 140 includes bridging base portion 192, having two sets of

blades

190, 190, and 19.1, 191 at the ends thereof, and the relative configurations of these

elements

190, 191, and 192 is the same as the relative configuration of

elements

90, 91, and 92 discussed hereinbefore.

Blades

191, 191 are snugly received over extrusion 242 which is secured at the. other side of barrier 170 to base block 120 by means of

suitable fasteners

244, 244. Extrusion 242 has an elevated medial portion 246 extending upwardly between opposing blades 191, 191 (see FIG. 8), and an integral base portion thereof extending on either side of raised medial portion 246 to provide the relatively short extension 248 extending downwardly as shown in FIG. 6 and relatively long extension 250 shown extending upwardly in FIG. 6 and FIG. 8. Extrusion 242 has identical cross section from one end to another, and preferrably has a large passageway 155 passing through enlarged portion 246. The passageway affords less weight, greater cooling, and less raw material metal expense.

A plurality of identical cartridge fuse-receiving

clips

126, 126 are secured to base plate 120 by means of fasteners 256, and these fuse clips include a base portion 258 and upwardly extending fuse-receiving arcuate portions 260. Base portion 258 includes a tongue or an extension 264 (see FIG. 7) which extends under the bottom of extrusion 242 and is in electrically conductive contact therewith as a result of its compression between extrusion 242 and base plate 120 as a consequence of the seating of fasteners 244 through extrusion 242 into base plate 120.

Thus, it will be appreciated that the cartridge fusereceiving clips 126 are energized through integral extrusion 242 which, in turn, is energized through

blades

191, 191 which closely and snugly receive raised medial portion 246 therebetween.

When block 116 is pulled clear of the remaining portion of the assembly,

blades

191, 191' and 190, 190' are withdrawn from contact with respective connecting

portion

132, 246, thus, breaking the electrical connection therebetween, and circuit closer 170 is also thereby de-energized. It will be appreciated that barrier 170 is essential to maintain the extrusion 242 electrically separated from connector-terminal 132, and furthermore to assure that the passage of electrical supply wire 130 into the passageway 155 can continue only until wire engages barrier 170, thereby assuring that the assembly 14 will not be connected to the power supply in such a way that the switch assembly 12 will be short circuited.

As in the embodiment shown in FIGS. 1 through 5, connector-terminal 132 is aligned with circuit closer so that the line drawn between the respective sets of

legs

190, 190, 191, 191, is parallel with the direction of the passageway in connector-terminal 132.

It is preferred that openings 53, 54, 153, 154 be plugged with an insulating filler after the respective wires are secured. Also, it is apparent that, in accordance with this invention, the block 116 carrying circuit closer 140 can be integral with or secured to an insulating cover extending over all the fuses 128 and fuse-contacting

elements

126, 242, 248 fuse panel assembly 14 whereby switch assembly 14 would be operated, upon opening of the fuse cover, to automatically withdraw circuit closer 140 to de-energize the fuses and all fuse clips 126 and other elements, e.g., 250, while the cover is open, and render it impossible to reenergize unless and until the cover is closed.

Although the use of aluminum connector-

terminals

32, 42, 132, 242 are satisfactory for non-current interrupting disconnect applications, copper and brass is the preferred material for connector-

terminals

32, 42, 132, 242 for interrupting appreciable to high amperage, e.g. 50 amps and up in normal voltage systems. Copper and brass have been found eminently satisfactory under overload test conditions, for example,

articles

32, 42 rated for 60 amps have been entirely satisfactory for 50 interrupt-close cycles at 300 amps when made from copper or brass.

It will be appreciated, from a consideration of the foregoing description, that, by the present invention, applicant has provided a switch structure, important electrically conducting components of which can be manufactured from extrusions, and important insulating components which can be made from injection molding, for example. Furthermore, it will be appreciated that major portions of the structures described hereinbefore can be assembled without the necessity of attaching the extrusions to the non-conducting elements, if desired, thus providing a greatly simplified assembly technique. Furthermore, in accordance with the preferred embodiment of the present invention, energized part of the circuit being interrupted by the switch of the present invention can be substantially completely hidden from inadvertent contact when the circuit is interrupted by withdrawal of the

circuit closers

40, 140. Moreover, these advantages can be achieved in conjunction with an additional important advantage, namely the reduction of the number of parts inherent in the triple role performed by the single connector-

terminal elements

32, 42, 132, namely as terminals, connectors and switch contacts. Furthermore, by providing the triple function extrusions with a

passageway

55, 155 through a mid-portion thereof, the cost of the connector-

terminal parts

32, 42 is substantially reduced because less metal is consumed in their manufacture, and the wire-receiving openings are formed by the extrusion die.

I claim:

1. A switch comprising a fixed connector-terminal and a movable circuit closing element which can be moved to and from contact with said fixed connectorterminal; said fixed connector-terminal consisting essentially of a body of electrically conducting material having substantially the same cross section from one end to the other, and having a passageway completely through a mid-portion thereof and extending from one end to the other end thereof; said body including set screw means passing transversely with respect to the axis of said passageway and being adapted to bind a wire received in said passageway, said connectorterminal being substantially immovably confined in a recess in an enclosure of insulating material, said enclosure having first port means extending therethrough to said recess and aligned with said passageway and adapted for the passage of a wire therethrough, second port means aligned with said set screw, and a third port means aligned with said connector-terminal and adapted for the passage of a portion of said movable circuit closer element therethrough; said connectorterminal, said housing and said circuit closer being adapted for the passage of electrically conducting portions of said circuit closer means into said recess and into an electrically conducting engagement with said connector-terminal.

2. The switch of claim 1 wherein said circuit closer comprises a saddle-shaped portion thereof adapted to firmly engage a portion of said connector-terminal, wherein a line drawn transversely to a line connecting respective sides of said saddle passes in a direction which is parallel to the wire-receiving passageway in said connector-terminal.

3. An electrical switch comprising a pair of fixed,

identical connector-terminals and a straddle-saddle circuit closer, which can be moved to and from contact with said fixed connector-terminals, an insulating base and an insulating barrier; each of said identical connector-terminals having the same cross-section from one end thereof to the other and having a passageway through a mid-portion thereof extending from one end to the other, set screw wire-fastening means extending transversely into said passageway and adapted for binding a wire residing in said passageway; said connectorterminals being aligned end-to-end; means for fixing the position of said connector-terminals with respect to said insulating base; said insulating barrier extending transversely between said connector-terminals and being fixed with respect to said base; and wherein said straddle-saddle circuit closer consists essentially of an integral bridge portion extending a sufficient distance to overlap a portion of each of said connectorterminals and having a saddle-shaped extension near the ends thereof for contacting said connectorterminals.

4. The switch of claim 3 wherein the assembly includes an insulating housing secured to said base by means of fasteners passing therebetween, said housing including a top and sidewalls, ports at opposite sidewalls aligned with said passageways in said connectorterminals for receiving wire therethrough, second port means in the top of said housing aligned with said set screw means for operator-adjustment of said set screw means by passage of a tool through said second port means; and third port means positioned in the top of said housing and aligned with each of said connectorterminals for passage of portions of said circuit-closer therethrough, said circuit-closer comprising an electrically conductive bridging element having means for extending into said recess on opposite sides of said barrier and electrically contacting each of said connectorterminals.

5. The circuit closer of claim 4 wherein the straddlesaddle circuit closer is fixed to an insulating insert block having means for withdrawal of said block by an operator, and wherein said insert block is snugly received in a recess in said top of said housing block.

6. A cartridge-fuse panel assembly comprising spaced-apart fuse holder means including a pair of fuse holders adapted for releasably electrically connecting opposite ends of a cartridge fuse, switch means for electrically connecting'one of said fuse holders to an electrical supply wherein said switch means comprises a pair of electrical contacts, and a movable electrically conducting bridge means for electrically connecting said contacts, operator controlled and means for moving said bridge means to and from contact with said contacts, wherein a first of said electrical contacts consists essentially of an electrically conducting body having the same cross-section from end to end, and having a substantial passageway extending in a mid-portion thereof from end to end, said body including set screw means for binding an electrical conductor therein in said passageway; second contact means consisting essentially of an extrusion having the same cross-section from end to end having an enlarged portion, and a relatively thin portion extending laterally therefrom, said switching means including insulating barrier means positioned between said first and second contacts; said circuit closer means including an integral conductor having a pair of saddle elements at either end thereof, said saddle elements being adapted for electrically contacting respective first and second contacts, said second contact being electrically connected to one of said cartridge fuse holders.

7. The fuse panel of claim 6 wherein said enlarged portion of said second contact element has a passageway extending therethrough from end to end.

8. The fuse panel of claim 6 wherein the second closer is fixed with respect to a removable cover which covers the fuses and fuse holders, and other switchenergized elements which are exposed to an operator upon removal of said cover.

9. A switch comprising a fixed connector-terminal and a movable circuit-closing element which can be moved to and from a contact with said fixed connectorterminal; said fixed connector-terminal consisting essentially of a body of electrically conducting material having substantially the same exterior configuration from one end to the other, and having a passageway extending into a mid-portion thereof from at least one of said ends; said body including operator-releasable fastening means for making electrical contact with and securing an electrical conductor in said passageway, said connector-terminal being substantially immovably confined in a recess in an enclosure of insulating material, said enclosure having port means extending therethrough to said recess and aligned with said passageway and adapted for the passage of said conductor therethrough, port means for operating said operatorreleasable fastening means, and a third port means aligned with said connector-terminal and adapted for the passage of a portion of a movable circuit closer element therethrough; said connector-terminal, said housing, and said circuit closer being adapted for the passage of electrically conducting portions of said circuit closer means into said recess and into electrically conducting engagement with said connector-terminal.

10. A switch comprising a fixed connector-terminal and a movable circuit closing element which can be moved to and from contact with a fixed connectorterminal; said fixed connector-terminal consisting essentially of a body of electrically conducting material having substantially the same external configuration from one end to the other, and having a passageway extending from at least one of said ends into a midportion thereof; said body including fastener means in said passageway being adapted to bind a conductor received in said passageway, said connector-terminal being substantially immovably confined in a recess in said connector-terminal.

UNITED "STATES 'TATENT OFFICE 'OF, CORRECTIUN Patent No. 3,805,206 Dated April 16, 1974 Inventor(s) Hans'Ege It is certifiedithst error pears in the above-identified patent and that said letters" Patent arehereby Corrected a's shownbelow:

g In column 2", line '39, "conector-terminal" should be connetorterminal-m I Q In colunm 2, line 44, "connectorterminals" should be --connectorter mi nals-. I

In column 3, line 17, "therof" should be -thereof--Q In column 3, line 53, delete "respective" and insert after "86" -at one side of barrier 7 and blades 91 pass through respective openings 86-.

Signed v and sealed this 24th day of; September 1974.

(SEAL) Attest:

MCCOY M. GIBSON JR. C. MARSHALL DANN Attesting Officer Commissioner of Patents ORM POJOSO USCOMM-DC 6O376-P69 US. GOVERNMENT PRINTING OFFICE 19.9 O35B"33I.

UNITED STATES PATENT OFFICE CORRECTION Patent No. 3,805,20 6 hated, 2 April 16, 1974 Inventor(s) I I it is certified error apiaeaie the 'above identiiied patent and that a P -F ere-W 'PPW below a in collmui 2", line '39, "coneccoi'etennihal" 52101115 be connectortermmlnal---a v In column 2, line 44, "connectorterminals? should be ---conhectorterini n'a ls In column 3 line 17, "therof" should be -thereof-. In column 3, line 53, delete "respective" and insert after "86" -at one side of barrier 70, and blades 91 pass through respective openings' 86-.

Signed I anl sealed this 24th day of September 1974.

(SEAL) Attest:

MCCOY M. GIBSON JR. C. MARSHALL DANN Attesting Officer v I Commissioner of Patents "ORM PC4050 USCOMM-DC wan-Poo US4 GOVERNMENT HUNTING OFFICE l9! O368-334.

Claims

1. A switch comprising a fixed connector-terminal and a movable circuit closing element which can be moved to and from contact with said fixed connector-terminal; said fixed connector-terminal consisting essentially of a body of electrically conducting material having substantially the same cross section from one end to the other, and having a passageway completely through a midportion thereof and extending from one end to the other end thereof; said body including set screw means passing transversely with respect to the axis of said passageway and being adapted to bind a wire received in said passageway, said connector-terminal being substantially immovably confined in a recess in an enclosure of insulating material, said enclosure having first port means extending therethrough to said recess and aligned with said passageway and adapted for the passage of a wire therethrough, second port means aligned with said set screw, and a third port means aligned with said connector-terminal and adapted for the passage of a portion of said movable circuit closer element therethrough; said connector-terminal, said housing and said circuit closer being adapted for the passage of electrically conducting portions of said circuit closer means into said recess and into an electrically conducting engagement with said connector-terminal.

3. An electrical switch comprising a pair of fixed, identical connector-terminals and a straddle-saddle circuit closer, which can be moved to and from contact with said fixed connector-terminals, an insulating base and an insulating barrier; each of said identical connector-terminals having the same cross-section from one end thereof to the other and having a passageway through a mid-portion thereof extending from one end to the other, set screw wire-fastening means extending transversely into said passageway and adapted for binding a wire residing in said passageway; said connector-terminals being aligned end-to-end; means for fixing the position of said connector-terminals with respect to said insulating base; said insulating barrier extending transversely between said connector-terminals and being fixed with respect to said base; and wherein said straddle-saddle circuit closer consists essentially of an integral bridge portion extending a sufficient distance to overlap a portion of each of said connector-terminals and having a saddle-shaped extension near the ends thereof for contacting said connector-terminals.

4. The switch of claim 3 wherein the assembly includes an insulating housing secured to said base by means of fasteners passing therebetween, said housing including a top and sidewalls, ports at opposite sidewalls aligned with said passageways in said connector-terminals for receiving wire therethrough, second port means in the top of said housing aligned with said set screw means for operator-adjustment of said set screw means by passage of a tool through said second port means; and third port means positioned in the top of said housing and aligned with each of said connector-terminals for passage of portions of said circuit-closer therethrough, said circuit-closer comprising an electrically conductive bridging element having means for extending into said recess on opposite sides of said barrier and electrically contacting each of said connector-terminals.

5. The circuit closer of claim 4 wherein the straddle-saddle circuit closer is fixed to an insulating insert block having means for withdrawal of said block by an operator, and wherein said insert block is snugly received in a recess in said top of said housing block.

6. A cartridge-fuse panel assembly comprising spaced-apart fuse holder means including a pair of fuse holders adapted for releasably electrically connecting opposite ends of a cartridge fuse, switch means for electrically connecting one of said fuse holders to an electrical supply wherein said switch means comprises a pair of electrical contacts, and a movable electrically conducting bridge means for electrically connecting said contacts, operator controlled and means for moving said bridge means to and from contact with said contacts, wherein a first of said electrical contacts consists essentially of an electrically conducting body having the same cross-section from end to end, and having a substantial passageway extending in a mid-portion thereof from end to end, said body including set screw means for binding an electrical conductor therein in said passageway; second contact means consisting essentially of an extrusion having the same cross-section from end to end having an enlarged portion, and a relatively thin portion extending laterally therefrom, said switching means including insulating barrier means positioned between said first and second contacts; said circuit closer means including an integral conductor having a pair of saddle elements at either end thereof, said saddle elements being adapted for electrically contacting respective first and second contacts, said second contact being electrically connected to one of said cartridge fuse holders.

8. The fuse panel of claim 6 wherein the second closer is fixed with respect to a removable cover which covers the fuses and fuse holders, and other switch-energized elements which are exposed to an operator upon removal of said cover.

9. A switch comprising a fixed connector-terminal and a movable circuit-closing element which can be moved to and from a contact with said fixed connector-terminal; said fixed connector-terminal consisting essentially of a body of electrically conducting material having substantially the same exterior configuraTion from one end to the other, and having a passageway extending into a mid-portion thereof from at least one of said ends; said body including operator-releasable fastening means for making electrical contact with and securing an electrical conductor in said passageway, said connector-terminal being substantially immovably confined in a recess in an enclosure of insulating material, said enclosure having port means extending therethrough to said recess and aligned with said passageway and adapted for the passage of said conductor therethrough, port means for operating said operator-releasable fastening means, and a third port means aligned with said connector-terminal and adapted for the passage of a portion of a movable circuit closer element therethrough; said connector-terminal, said housing, and said circuit closer being adapted for the passage of electrically conducting portions of said circuit closer means into said recess and into electrically conducting engagement with said connector-terminal.

10. A switch comprising a fixed connector-terminal and a movable circuit closing element which can be moved to and from contact with a fixed connector-terminal; said fixed connector-terminal consisting essentially of a body of electrically conducting material having substantially the same external configuration from one end to the other, and having a passageway extending from at least one of said ends into a mid-portion thereof; said body including fastener means in said passageway being adapted to bind a conductor received in said passageway, said connector-terminal being substantially immovably confined in a recess in an enclosure of insulating material, said enclosure having first port means extending therethrough to said recess and aligned with said passageway and adapted for the passage of said conductor therethrough, and second port means aligned with said connector-terminal and adapted for the passage of a portion of said movable circuit closing elements therethrough; said connector-terminal, said housing and said circuit closer being adapted for the passage of electrically conducting portions of said circuit closer means into said recess and into an electrically conducting engagement with said connector-terminal.