US1989645A

US1989645A - Fuse testing device

Info

Publication number: US1989645A
Application number: US591363A
Authority: US
Inventors: Podell Morris
Original assignee: Individual
Current assignee: Individual
Priority date: 1932-02-06
Filing date: 1932-02-06
Publication date: 1935-01-29
Anticipated expiration: 1952-01-29

Description

Jan. 29, 1935. M. PODELL 1,989,645

FUSE TESTING DEVICE Filed Feb. 6, 1932 2 Sheets-Sheet l HIIIL 1NVENTOR. jaw 1 m m we.

8 BY L ATTORNEYJ' Jan. 29, 1935.

M, PODELL FUSE TESTING DEVICE Filed Feb. 6, 1932 2 Sheets-Sheet 2 INVEN. m M

mos/4% ATTORNEYJ Patented Jan. 29, 1935 v t FnsE- TESTING nnvrcef- Morris Ear H Application February 6, 1932;: s eing Senate 7 me e; (crime-183),

1. UNITED STATES; PATENT 7 invention relates to a new.- and; improved, made ot fibre on othersi itabie; insulating mate fuse testing device; 1 i rial. H 1; i One of theobjectsof my: invention is-to produce As shown in F g. 2a, the outer end-oi; the leg, animprcvedf-use-testing devicecomprisingaplucomprises. additional, memhereor layers; 1c and 5 rality of rigid memberszhavingconduoting means 1.:1 These layers, or membersaxe connected to 5 which; arein cii cuit with a. suitable detector; such 631C111 other and to members la and Lh-bxmeans as-a glow lamp, or. the-like. 1 of'rivetsfi, I x 1 Another object. of myinvention is-to provide As shown iniFigda theendxofitheelog' 2 adevice whiehshal'libe simpleand-cheapto mancomprises outside-membersgr layers gd and: 2-1;),

ufacture and whichshallbe ofdurable. construcand an intermediate insert 2c. As shown-'in-Fig, 10 tionr Lltheouten end ctthe leg ZyCQmIQ 'iSF S. the-layers Another object of myintention is tcprovide a hand 2h.andintizrmediatelaogers Zeqand 21%;. like device-of: this type comprising pivoted rigid mom insert ismade-of moldable insulating; material hers. v r .o va and ngs e r pr dear he m d ne th 16 Another object. of. my invention is to. providea molding.operationtin;orderzto leave spaceto; ac- 115 device: ofithistypewhiehcan:also-serveasa fuse commcdate the resistance F and. the.deteeting puller. U or indieatinsdeyice 6.,. Ir thiscasethe detecting Other obiects of my invention willzbeset. forth or indicating-devicefiis ag-lcw lamponneoniiamp; in the following-description and drawings which butitmax beam type of lampiv and anyrtype of}.

2c illustrate a preferred. embodiment thereof, it:beindicating device may; hehused V In crder to; se go ing understood-that"theabovea general. statement surely. holditheglow lampmposition, and to id of the. objects ofr-my invention is intended to low-fonyariaticns inthe oi glow lamps, a. merely generally explain the same and not to resilient member 5a made-of-ruhbee otiother suit; limit it in any manner. v 1 able material soitabiy connectedtame insert 25 j Fig; 1 is2a side elevation-. 1 V 2a. The. indica ing: device-mam be connected to 25 v Fig. 2 isafront elevations the oircuit'inv any suitable mannen Fig-2a is a. partial; side elevation shotvinga the ASShQWQ-ZiII-EigM 12, nesilient member 5a sidecpposite to that whichisillustrated-in Fig. 1. partialls; enc1oses;- and abuts-r the lamp 6. As Fig. 3 is a sectionalviewon the line 3-3, of ehcwndniliigsndandulz,themember Zais provide 39 Fig. 2 7 Y ed withanopening. 12 which is closed bye-sheet v FigAis an inner elevation cfrcne-of thelegs.v of mica or cthei. lightpermeahle materialr 12a Fig. 5 is a side View of Fig; 4; sothattheglow oi: thelamg} can be-readilg: de- H Fig (i-ie an inner elevation ofthe. other 1eg -.'v tected; j a

i '7. is aside elevationiof- Fig.. 6,-.the insert TheresistanceRiis conventionally-indicatedrin being'omitted. Fig, 9. resistanceis pzxeierabiy at Gal-b011- 35,

Fig; e is a diagrammatic view oi the circuit resistance ofi highival e sothat; very small" Our-- Fig-.9 isanelevationshowing. the insert which rentis-sentithrqughathedamp 6,, when thedeyice is located in:one of the legs; isusedfrm testingtafuse Ihelamp can be con"- Fig. leis; aside elevation of Fig. 9. nected; to theterminale togbe tested; either in 40 Figh ll is a seetionalz view on the. line; LIV- 11 series oninishimt A QIFiE GQDIl BQtiQHniSShDWD 40 oi Fig-iih i i 1 i in the drawings, and the usepigthehighcarhon I F -p12 a sectional view on the-line 12- -i2 resistancemakes it possible-tonsethesamebulb of Fig. 2. I -r Y r on circuits having; difierentgcommercialvoltages, M s Fig; 13 is a vertical sectionalzview oi one of the such1as- 1'10 -vo1ts-,-22(t voltsaamlgas highz-as: 600 46 .endzeeps. v i t a i. 5 a 1 I H The: device; comprises alpairoflegs 1- and; 2, Conductors m ane eonnectad mz any preferablymadeof piecesef insulatingv material suitable: memento-the terminals oi. the glow and: said. legs are connected to each. other by; a lamp and, for this purpose the device be pivot memhemSirwhichcanz bemade of metal: or provided withaa sccketof any eonventionaktme 50 anyvcther suitablemateriahanchwhich isacfirivetintowhich the glow lamp may be placed The 50 .likerc'on'struetion. The outer ends; of'said: rigid resistanceR- is-iconnected tc a confine-ting wire legsmay be shaped soithatithe device cam be used T whose inner endris.- cursed -tahcokn-like shape, or-handling aofuse F. v so: that this hQQk-rlikfi; endmhutsthe inner end As shown in Fig; Ltheinner end' of'the 1eg:.1 at the: 1eg:2j.'. Theeonduotor ai base correspond;- comprises two -leg members 1a and lb which: are inelyrshanedahoek likefendr which abuts the-inner end of the leg 1. Metal thimbles 4 and can be connected to the inner ends of the

legs

1 and 2. This could be accomplished by means of a drive fit, but I prefer to have some of the rivets 3 extend through the metal thimbles 4 and 5. The metal thimbles 4 and 5 are thus pressed firmly against the hook-like inner ends of the conductors, in order to insure firm contact. The outer end of the conducting wire 7a is bent to form afll'oop me'mber fL' and the outer end of the conducting wire B'is' bent to form a loop L. These wires may be uninsulated as they are securely held in suitable recesses G provided there for in the insulating material from; which'the legs of the device are made. For example, "and as shown in Fig. 3, the members 'ld andib may be provided with recessesuinwhich the wire, 8 is located. The loops L and'fLf are free from insulation so that they can contact-i with' each.

other. The wires "la and 7b are located in a reces's provided theinsert 26'. The loops 'L and L pass around the pivot member 9 without touching Figs; 4'and fishowihow each of the legs is provided with"anj'-arcuate-- groove Gin order'to respectively receive" the loops L and L; Said loops L and L can slide one upon the other with little or no friction; "whil'e being maintained in firm rubbing contact so' iasft'o complete thecircuit betWeentheIn.- Y 7 a As shown m-nig's; 14; Band 8,- the wire 8 passes out of thefleg member 1a," through'jan opening l0. '-S aid reopen-and L: are concentric with the axis about which the rigid legs turn.

Although I have'shown a combination device for testing the fuse and 'for pulling thefuse from its socket, the 'invention" is '-'noti necessarily limitedto suchi'combinat'ion device.- 'Heretofore it has been customary "to use a'glow lamp to which flexible conductors-were connected in order to test --a means 'thejuse ofimembers to one of which thedetect'or device is connected, presents numerous-advantaged" The innerfend'softhe conducting wires may-be considered as "constituting outer conducting terminals, which are enlarged by, the metal members-4 and It is not necessary "tom ake the device throughout of insulating material although is-pr eferred because any part of the device could be-lnade from co'nducting material, such-' as 1 metal; "by suitably} insulating the corresponding portion-or portions of the con-,- ducting wires Although I have shown the in- 'dicating device ias" being mounted, within one of the legs,-"-it would not be-departin'g'frornmy invention-if saidindicating device were mounted any manner upon-any of the rigid members. Said indicating device could be a buzzer or other acoustic device al'tho'ugh the use of a glow lamp preferred; since it requires a-very minute current to 'causejthe' same to glow.

'Of course it woul dfnot be departing from the invention ifa 'pliirality 'of detector devices were llti lizedfafid said dtectdr devices could. be mounted onone or on both of the rigid legs.

"' -While I have stated-that the device can be' used 'for'testingya fuse; said device'could obviously be used for testing any circuit by connecting the wires "8 f and "lb to theternnnals of v the circuit to "be tested. 1

' orfexam'p le, the metal -members '4- and 5 =could have 'serrat'ed outer surfaces in order to prevent them" from slipping along the ends of the fuses or] buss-bars, etc. Likewise the I members 4 am '5 could be replaced-by discs having serof the circuit to be tested, said rigid members being maderthroughout of insulating material.

'2. A'circuit testing device comprising a pair ofl rigid "member's pivotally connected to each other,,,a,detector device mounted on one of said 'rigidmembers,' conducting wires connected to saidtdetecto'r device and respectively mounted on said rigid members, the adjacent ends of said conducting wires comprising portions whi'chare in rubbing contact with each other, said conducting wires being adapted to complete the circuit between said detector device and the terminals of the circuit to be tested;

' -3. A circuit testing device comprising a pair of rigid members, a pivot member-pivotally connecting said rigid members, a detector device mounted on one of said rigid members, wires mountedon said rigid members, one of saidwires having the detector device in its circuit, the ad'- jacen't'ends of said wires being free from insulation and being in rubbing contact, that portion of each rigid member which is adjacent the-uninsulated ends of the wires being made from insulating material, s'aid'wires extending to the exterior surfaces of said rigid members.

51. A circuit testing device comprising a pair of ri'gid'members, a pivot member pivotally conmeeting said rigid members, a detector device mounted on'one-of said rigid members, wires located' within said rigid 1 members, one of said wires having the detector-devi'ce in its circuit, the adjacent ends of said wires forming loops which are substantially concentric with theaxis of said pivot member and which are in rubbing contact, said wires extending to the exterior surfaces of said rigid members, said rigid members being made of insulating material.

5. A combination fuse extractor and, fuse testing device comprising a pair of rigid members, a pivot member pivotally connecting said rigid members, the outer ends of said rigid members being shaped to grip a fuse, a detector device mounted on the innerend of one of said rigid members, wires mounted on said rigid members, one of said wires having the detectordevice in its circuit, the adjacent ends of saidwires being free from insulation and bein in rubbing contact, that portion of each rigid member which is adjacent the uninsulated ends of the wires being made from insulating material, said wires extending to the exterior surfaces of said rigid members.

' 6. A combination fuse extractor and fuse testing device comprising a pair of rigid members, a pivot member pivotally connecting said rigid members, the outer ends-of said rigid members being shaped togripa fuse, a detector device mounted on-the'inner-end of oneof said rigid membera'Wiresmounted on said rigid members, one o'f'said wires having the detector device in its circuit, the adjacent ends of said wires being free from insulation and being in rubbing-con:- tact, that portion of each rigid'member which is :adjacent the uninsulated ends of the wires being made from insulating material, said Wires extending to the exterior surfaces of said rigid members, the adjacent ends of said wires forming loops which are substantially concentric with the axis of said pivot member.

7. A combination fuse extractor and fuse testing device comprising a pair of rigid members made of insulating material, a pivot member pivotally connecting said rigid members, the outer ends of said rigid members being shaped to grip a fuse, a detector device associated with one of said rigid members, wires located within said rigid members, one of said wires having the detector device in its circuit, the adjacent ends of said wires being in rubbing contact, said wires extending to the exterior surfaces of said rigid members, and metal members located at the inner ends of said rigid members and respectively contacting with said wires.

8. A circuit-testing device comprising a pair of rigid members, a pivot connecting said rigid members, a detector device mounted on one of said rigid members, conducting wires connected to said detector device and respectively mounted within said rigid members so as to be turnable in unison therewith, the adjacent ends of said conducting wires comprising portions which are in rubbing contact with each other, said rigid members having recesses in which said adjacent ends are located, said adjacent ends being concentric with said pivot member, said conducting wires being adapted to complete the circuit between said detector device and the terminals of the circuit to be tested.

9. A combination fuse extractor and fuse-testing device comprising a first rigid leg and a second rigid leg, a pivot member connecting said rigid legs, each of said legs comprising an inner portion, each of said legs also comprising an outer portion, said outer portions being adapted to grip the fuse, the inner portion of the first leg comprising a plurality of rigid insulating members between which a wire is located, the outer portion of the first leg comprising said rigid insulating members, and also additional rigid insulating members between which the first mentioned rigid members are located, the inner portion of the second leg comprising spaced rigid members made of insulating material and having an intermediate insert in which there is located a detector device, and a second conducting wire which is connected to said detector device, the

ends of said wires which are close to said pivot member being in rubbing contact with each other and being located in recesses which are provided in the respective legs, the inner portion of the first leg being located between the spaced rigid members of the second leg adjacent said pivot member.

10. A combination fuse extractor and fusetesting device comprising a first rigid leg and a second rigid leg, a pivot member connecting. said rigid legs, said legs being made of insulating material, each of said legs comprising an inner portion, each of said legs also comprising an outer portion, said outer portions being adapted to grip the fuse, the inner portion of the second leg having outer spaced and rigid members, said spaced rigid members having an insert located between them, a detector device and a wire mounted in said insert, the first rigid leg being located between said spaced rigid members adjacent the pivot member, the first rigid leg also having a wire located therein, the ends of said wires which are close to said pivot member being in rubbing contact with each other and being located in recesses which are provided in the respective legs.

11. A circuit-testing device comprising a first rigid member and a second rigid member, said rigid members being made of insulating material, a pivot connecting said rigid members, said rigid members having recesses around said pivot, said recesses registering with each other, said rigid members having conducting members at their outer ends, the first rigid member having a detector device mounted thereon and connected to the respective outer metal member, said outer conducting members being connected with each other through said detector device by conducting means parts of which are located within said recesses.

12. A circuit-testing device comprising a first rigid member and a second rigid member, said members being connected by a pivot, said members being made of insulating material on both sides of said pivot, said rigid members having conducting members on their outer ends, the first rigid member having a detector device mounted thereon and connected to the respective outer conducting member, said outer conducting members being connected with each other and through said detector device by conducting means a part of which is exposed only at the adjacent surfaces of said rigid members adjacent said pivot pin, said conducting means being enclosed by said rigid members.

13. In an electric fuse tester, a pair of compassing legs of insulating material having pivoted connection with each other, a pair of test pins secured to the free end of said legs, a neon tube located in one leg and being visible through an aperture therein, a resistance unit, and con- I ducting means in said legs for connecting said tube in circuit with said pins and said resistance unit.

MORRIS PODELL.