US1525972A - Electric switch - Google Patents

Description

l 1,525,972 VC. J. ZIGLER ET AL ELECTRIC SWITCH Filed April le, 1921 2 Sheets-Sheet l Feb. 10, 1925.

C. J. ZIGLER ET AL,

ELECTRIC SWITCH 2 Sheets-Sheet 2 clip an elongated hole 31 to receive ment 'of the extremities of the arm 1 6 with the clips Q9 on thc cross head bar 10 will operate the switch depending upon the direction of movement of the shaft 15. The. extremities of the blades 7 make a spring contact with the jaws S and if a sutlicient Contact is not made with the jaws the spring- 2G is operative to pull the blades out of eontact with the jaws. This is for the purpose of insuring that a proper and sufficient coutact is made.

The construction thus described has a nick throw action as will be more apparent rom Fig. 4 for the arms 1G have both a sliding and a turningengagement with the clips 29 and the radius ot' the arm 1G where it engages the cross head clip 29 ot' blade 7 is less than the length ot the blade that engages the Contact jaws S. The result of this is that the circumterenceor arc of move- Ament of the arms 1G is less in length than that of the contact blades T, and as the axis of the shaft 18 is eccentricto the pivot point of the blades; 7, a differential cornice-.-

tion is made by the. arr'ns 16 and clipsl 29 which produces .the more rapid movement 'of the switch blades T, thereby causing'a quick make and break connectionot the.

yFreni this description-it will also be seen that We provide an enclosed switch construetion having an operating 'shaft which is straight throughout its' Ientire, llength within the box. This -notI only less'ensl the cost ot' construction but, taken with the means for connecting the sameto 4the switch, overcomes a number of' objectionable features o' the prior constructions of this same general character. For instance, with switches having shattswhicli are lbent Within the box the opening mechanism for giving a quick break to the switch blades. These springs have been :tou'nd to jar the mechanism Whenever the switch is opened and such jarring is apt to loos'en the different parts or cause other, injury.' Vith our improved construction the straight shaft is not ap-t to tbend and furthermore the elimination of the springs avoids the difficulties incident l to such constructions.

vWe claim:4 v j 1. A device of the character set forth comprising a casing having a knife switch mounted therein, a shaft whichv is straight throua'hout its len orth within the casinfr ivt b D? 2. device of. the, character set orth,'

comprising a box, a knife' switch mounted in said bok, a shaft extending through the box and pivoted therein adjacent te the hinges of the switch blades, said shaft being. i

straight throughout its length Within the box, a .handle for the lshaitt.arranged ein terioi'ly of the box andnteansfcounecting the shaft' with the switch, whereby .the

switch. will be opened land closed by tuij-iiing the'fshaft.

f3. In u switch construction, the combina# tion of a box having' a switch blade pivotally' mounted therein, a straight shaft passing through the box adjacent. to the pivot v 'ot' the blade :ind rotatabl)v .mounted `iii the box. means tor turning" said shaft, an arm such that theclip will slide along therarni as the'arm is moved to open or close theblade. q .y

4. ,A switch construction,comprising a casing, a knife switch mounted in said cas.

ing, said switch having; a plurality of pivoteldblades, a' cross bar` connectingsaid blades intermediate ot' their ends, clips on said cross bar, a straight' sliaftjtiivotally mounted in the casing' vadjacent to .the

at y on the sha'it and a clip` connected with the blade', said clip having 'an openingT for receiving the arm, the arrangement being,`

hinges of the blades and one or more arms secured to the shaft, cach of said arinsfengagging with a hole in Va corresponding,` clip, whereby the switch will be opened or closed as the shaft is turned. v

5; The combination with a pivoted'switch blade, a resilient engaging contact, of a receptacle therefor, a shaft piVota'lly mounted in the receptacle, an arm projecting fromA said shaft,1 a sliding connection between the arm and the blade, and a resilient connection between the box and the .operating fie member tofthrow the blade out of engagenientwith its Contact when its Contact does not sufliciently engage it. I

6. The combination with a. knife switch having an insulating `cross he'ad, of a. switch containing receptacle, switch iiieans comprising a straight shaft rotatable in the receptacle, an armen the shaft having a differential connection with the"l cross operating head, and insulating sleeves mounted on the 13 `treinty of the arm adapted to be continuously and si'idehiy connected to the heded 4portion of the switch for dii'crentielly operating the switch 'when the she-ft ie turned.

8. The combination with e -z-nivitch box having e hinged cover, a siot in the eide of the boit adjacent the 'tree edge of the cover, of a switch operating shaft mounted in the box and inserteble through the alot thereof., e. piete to hold the shaft in piace attecheble at ne sides of the slot and projecting above the edge of the. box with an eye in the loro jecting end, the cover being termed with .e perforation which slips over the projecting end of the plate, and en erm in connection y with the sha-.tt having en eye web registers with the eye'oi said plete to ieceive e com mon locking member.

9. The combination with a knife switch, of e. 'nox in "which it is mounted an opereting attachment .'thereor, said attachment having' e tumbler shaft with e. crank end. extending outside the box, an operating erm' attached to the shaft, und e member in sueted from the switch blade and having an elongated perforation through which the operating erm extends to 1Ecrin e continuons sliding diierential l connection therewith when theshait is rotated.-

lG. A switch operating attach-.nent for knife switches' comprising e Str-.iight shaft with a. crank handle at one end, en operating erm attached to and projecting from the shaft, Ineens to form e varying diiferentiel connection between the rec end of said erin and the switch, and n spring ettachehic to the shaft end to some fixed part for ontoe inuticeily operating the attachment when the 1enie 'switch does not sncienty eng-ege ite contacts.

C: A D en operating device igor the switch 11. The combination with e switch and e receptecie therefor having e hin ed iid, of having o crank erm outside of the ocx with en eye at the outer end, a plete attached to the eide of and extending through the iid of the box when it is ciosed having an ege which registere Wim the eye 'of the erm, forming e connection between the operating devices and the switch, ineens engaging the eyes of the plete end the crank erm for docking the hd closed end for locking the open-ting member in open. poeition when the lid is open or ciosed.

i2. The combination with e. Switch having pivoted olefes sind en insulating c'rose heed7 of en operating member 'thereor comprising e. roteteole Shet, arms mnted on the shat between the bieden inni-teg sleeves enrrounding the shaft hete' i the crine. for .insnieting it from the swmz-h. hiedes, e perforated part through which each of' the ernis is eiidabe Without iost motion, ineens for ottechjng seid parte to the crose heed, and means for rotating the ehet to operate the switch through the cross heed connection.

13. Aswitch having a'pivoted blade, ot en eccentrcalijg pivoted tumher shaft, and ineensliorming e positive end sding diien ential turning connection between the shefand the blade for accelerating the movement of the letter with i'espect'to the shaft.

14. The combination with e switch hol; having e. hinged cover with .e iidA in the ire@ edge thereof and e. projection exten-ding; through the sot when the cover is closed. with. en eye in the projecting portion, of a switch operating shaft mounted in the box having e. crank erm with en eye et the end which registers with the eye oi the seid pio jee-tion to receive e common iociring member.

l5. A switch construction comprising o metal enclosure with e knife switch mounted therein, e. shaft pivoted in said encloenie, connections from the shaft to the switch for operating the switch and insulation on the shaft adjacent to the switch parte.

CHARLES J. ZG-LER. WLLIAM P. HULDEN.

Sti

Images