US1291667A

US1291667A - Electrical switch.

Info

Publication number: US1291667A
Application number: US10556516A
Authority: US
Inventors: Albert P Ball; Frederick Zenker
Original assignee: Detroit Fuse & Manufacturing Co
Current assignee: Detroit Fuse & Manufacturing Co
Priority date: 1916-06-24
Filing date: 1916-06-24
Publication date: 1919-01-14
Anticipated expiration: 1936-01-14

Description

A. P. BALL & F. ZENKER.

ELECTRICAL SWITCH.

APPLICATION mm mm 24.

Patented Jan. M, 1919.

5 H W J $1.112. min

-one Brvson Dexter 'iinrrnn @TATE% earner oei ien ALBERT P. BALL, OF ROYAL OAK, AND FREDERICK ZENKER, OF HIGHLAND PARK, MICHIGAN, ASSIGNOBS TO DETROIT FUSE Qt MANUFACTURING COMPANY. A

COBPORATIQN F MICHIGAN.

ELECTRICAL SWITCH.

Specification of Zetters Patent.

Patented Jan. M, 915

Application filed June 24, 1916. ,Scr'lal No. 105,565.

11 (IN whom i/ may (Oil/1'1!!! Be it known that we. Anni-an P. BALL, a eilizen ot' the United States, residing at Royal Unit, in the eounty of Oakland and State iiihliirliig'iiii. and Finconnn-K 'Znxnrrn, a subject of the Emperor of Germany, residing at Highland Park, eonnt-v ot' Wayne, and State of iviiehigan. have invented certain new and useful Improvements in Electrii'al rawit hes, of which the "following. taken in eonnectiou with the aeeompiuiying sheet of drawings. is a tall. eiear. and cow rise description thereof.

Un present invention more particularly relates to motor starting switches of the type diselosed in a previous application filed by Ilorton and ourselves on Mareh 4, 1916, hearing Serial Number BQJ T. upon whieh this present invention is an im;irovement.

in this previous applieation we have diswlosed a motor starting switeh in whieh novel means is shown for eontrolling the operation of the switeh meehanisni in such a way as to' insure the initial closing of the switch in the. starting position preparatory to closing it in its serviee or running posi tion.

Among the olrierts of our present inven tion is to provide an improved form of eontrolling meehanism for thi purpose of simpl iliied eharaeter and one which i eliieienl in operation and of durable eonstruetion.

A further object of our present invention is to provide means whereby the movablymounted switeh contacts will be automatieall r thrown from startin; to running po sition with that desirable rapidity which is neeessarv to render funetionally inopera tive the eontrolling meehanism which requires that the movable eontaets be initially moved to the starting position before they ean be thrown to the running position. 'lhese and other objeets of the invention will be apparent from the following deseription. ret'erenee being had to the aeeompanyin; sheet oi drawings in which we haw shown bv way of example a double throw switeh einlmdviing the prineiples of our present invention. and in whieh,-

Figure l is a view in top plan of such double throw motor starting ziwiteh, the

switch eontaets being illustrated in running position;

Fig.2 is an enlarged fragmentary view in side elevation of the switch eontrollinjr meehanisin taken on line (I(i of Fig. 1.

Fig. 3 is a similar view thereof showing the relative positions of the controlling latch and the operatlng eranlc when the contacts are in starting position as well as in neutral position. [he hitter being illustrated in dotted outline.

Generally.deseribing the present invention in detail the switeh meehanism is preferably housed within a rectangular metallie easing 1. provided with a hinged eover 2. Thi metallie housing serve as a proteelion to the switeh meehanism as well as providing a eonvenient bearing support for the eranlt or operating member. In order to allow for the oseillatorv movement of the erank when manipulated the eover is formed with an enlargement provided with the eavit b. Mounted within theeasing and upon the bottom thereof is the base 4'. whieh may be made of suitable insulating material \vhieh serves as a mounting for the fuse holders 5 and the serie ol stationary eouhi ls (3 and the. former representing the running eontaets while the lalter'represents the starting eontaets ot' the. double-throw motor starter switeh illustrated. \rranized intermediate ol' the contacts and lihewise mounted upon the base 4' are the pivot supports 8 tor the movable. l nil'elila(le eontaets J. 'lhese knife-blade eoul'aels are eross-eonnet-ted with eaeh other by means of the eon neeling member or eross-head comprising a portion l' the operating erank l0 and insulated therel'rom v the sleeve of insulating material IL'suilable omieelols l2 ing employed For onvenienll eonneetine tho l nileblades to the insulated eranlt. lhe ends of the operating erank are journaled in opposite sides of tlie easing at a point substimlially in aiinement with the pivot points of movable knife-blade eontaets. For the purpose of eheapness and eonven ient asseml'ly the erank is of one-pieee eoir Hl 'llt'tlmh and terminates in an outwardly and lalerall v-direetwl arm 13-, whieh has t'as iened thereto a handle H. by means of which the switell is manipulated.

From the description thus far it will be apparent that the crank which carries the wardly and substantially removed from eitherset of stationary contacts.

In order to control the movement of the crank so as to prevent the knife-blade contacts from being thrown from neutral to running position but allowing the same to be initially thrown to starting position, and thereafter brought into running position, we provide the novel form of controlling mech anism illustrated in enlarged detail. in Figs. 1 and 3. This particular mechanism which we have illustrated by way of example takes the form of a forked controlling plate 15, pivoted at 16 to a standard or support 17, the latter being riveted at 18 to the bottom of the metal housing 1. This forked controlling plate is made of sheet metal and has two'tangs 18 and 19 between which are the stepped reintrant apertures or

cutouts

20 and 21, the lower ends of which conform in curvature to the curvature of the operatin crank. H portions are slightly diverging to facilitate the operation of the crank when being thrown from one position to another.

The operating crank, it will beseen, is confined within and between the forked con 'trolling plate. A spring 22 fast at one end to the standard 17 and at the other end to the forked controlling latch normally tends to hold the controlling latch in its upward position where it normally coiiperates with the crank when in 0H position to prevent the latter from being thrown directly to running position, as illustrated in dotted outline in Fig. 3. It will be noted that the crank 10 is situated within the reintrant cutout 21, and, by reason of the relation of the pivot points of the crank 10 and the latch 15, the crank is restrained and prevented from being moved to the running position. However, the mounting of this latch plate in the manner described does not prevent the operating crank and connected knife-blade contacts from being thrown to the starting position. When such movement is desired, the crank is operated, and during the, operation it rides along the inner surface of the tang 19 of the latch, causing itto move on its pivot 16. In this manner the knife-blade contacts are brought into connection with the stationary starting contacts,

The guide walls of these rentranoas will be apparent. When the spring 16 has passed over its dead center, the controlling latch will be caused to ,move to position shown in Fig. 3 with the tang 18 resting against the crank, in position to be moved when the crank is moved t p throw the pivoted knife-blade contacts to running position, as will now be explained.

In motor starter switches it is desirable to make these movements sequential and the 7 latter movement from the starting position to the running position with great rapidity.

- Vi e, therefore, have provided for this by employing a spring 23, under the tension of which this movement is automatically accomplished in arapid manner. This spring at one end is anchored at 2 1 to the bottom of the casing 1' and has .its other and free end curved or bent at 25 so as to partly encircle the erank, the intermediate portion of g the spring beingcoiled around the crank as I shown in Fig. ,1. It willbe apparent from this that, after the crank is thrown over into starting position, tension will be put upon the spring 23 and it is this tension which, 9 when the crank is released by the hand of the user, automatically throws the movable knifeblade contacts from the starting contacts over on to the running contacts. The parts of the latch mechanism described are 9 so proportioned, and the movement thereof under the tension of the spring 22 is such that the movement ofthe crank from start ing to running position under the tension of the spring 23 is effected before the latch 1 mechanism is enabled to arrest the movement of the crank by catching it in "the reentrant portion 21. When in this running position the crank 10 is accommodated within the rei ntrant portion of the cutout 20, 3 as shown in Fig. 2. hen the switch mechanism is again moved to. break the circuit,-

"that is, in throwing the switch to its cit position the latch 15 under the tension of the spring22, causes the step formed. by the 1 reentrant or cutout 21 to pass beneath the crank 10 into controlling position, where it,

will prevent it from being thrown into run ning position without, firsthaving been'ininot wish to be iinderstood as restricting our- 12 selves to the precise structural details as these may be changed or altered without departing from the spirit and scope of our invention as defined by the following claims.

Having thus described our invention 12 what we claim as .new herein" and'desire to secure by Letters Patent is: I r

1. In a device of the class described, the comblnation with a crank having a cross member, stationary running contacts at one 13 I hers and cooperating movable contact mom -movable contact members from starting to running positlon, comprising ODB-PlQCG 1 spring tensloned member, an automaticmeans for quickly throwing said switch from starting to running position.

11. In a motor starting switch starting and running positions, the combination of means controlling the sequence. of operations of said switch, comprising a 'oncpiece member spring tensioned so as to inherently tend to remain in either of two extreme positions, and automatic means for throwing said switch from starting to running position. I 12. In a motor starting switch having stationary starting and running contact members, the combination of means controlling the sequence of operations of said switch, comprising a one-piece member spring tensioned so as to inherently tend to remain in either of two extreme positions and allowing only a rapid motion of the movable contact members from starting to running position, and automatic means for throwing said switch from starting to running position.

13. In a motor starting switch having stationary starting and running contact members and cooperative movable contaat menibcrs, and a cross head connecting said movable contact members, the combinatirin of means controlling the sequence of operations of said switch, comprising a member directly engaging said matic means for throwing said switch starting to running pos1t1on.

having i positions and from starting to running cross head and autofrom 14. In a motor starting switch having stationary starting and runnin contact members and cooperating movab e contact members and a cross head connecting said movable members, the combination of means controlling the sequence of operations of said switch, comprising a member directly engaging said cross head and allowing only a rapid motion of the movable contact members from starting to running position, and automatic means for throwing said switch from starting to running position.

15. In a motor starting switch havingstationary starting andrurming contact members and cooperative movable contact members, and a cross head connecting said movable contact members, the combination of means controlling thesequence of operation of said switch and comprising aforked member surrounding said cross head in all directly engaging said cross head, and automatic means for throwing said switch from starting to running position.

16. In a motor starting switch having stationary starting and running contact members and cooperating movable Contactmembers, and a cross head connecting said mow able contact members, the combination of means controlling the sequence of operation of said switch and allowing only a rapid motion of the movable contact members position, 'comprising a forked member surrounding said crossheadin all positions and directly engaging said crOss head, and automatic means for throwing said switch running position,

ALBERT r. BALL. FREDERICK ZENK'ER.

from starting to ilisclaimc i l l l l l l DISCLAIMER- 1,291,567.A.Zbert P. Ball, Royal Oak, and Frederick Ze'ntfer, Highland Park, Mich.

EL'iI-CTRXCAL Swiron. Patent dated January 14, 1919. Disclaimer iiled November 13, 1920, by the patcntces and nssignee, Sguare I) Company.

Enters its disclaimcr To claims in said specification which read in the following words, to Wit: r

8. In :1 motor starting switch having stationery starting and running contact mcmliiers and cooperative movable contact members, the combination of means controlling the sequence of operations of said switch, and automatic means for quickly throwing said switch from starting to running position.

J. In a motor stzn'ting switch having stationary starting and running contact IIlQIDlMHS and cooperative movable contact members, the combination of means controlling the sequence of operations of sztirbswitch and allowing only a rapid motion of the movable contact members from. starting to running position, and automatic means for quickly throwing said switch from starting to rm'ining position.

l l. in a motor starting switch having stationary starting and running contact ,rrvcmbcrs, the combination ol means controlling the soqncncc of operfitions oP-seid switch and allowing only a rapid motion of the movable contact members from starting to running position, comprising one-piece spring tensiencd member-,nnd znitomatic means for quickly throwing said switch from starting to running position.

13. in motor starting switch having-stat-ionery starting and running contact membws and mi'fipmzitivc movable contact members, and a cross head connecting said movable contzn'i numbers, the mmbination of means controlling the sequence of operations of said switch, comprising a member directly engaglng said cross bond and il-Uiiii'lutilli means for throwing said switch from starting to running position.

M. in a motor starting switch having stationary starting and running Contact members and cooperating Inmnblv contact members and a cross head connecting said movable members, the combination ol means controlling the sequence of operations of said switch, comprising'n member directly engaging said cross head and allowingonly at rapid nwtion cl the movable contact members from starting to running position, and. {illiwiflzlilC means 'l'or throwing said switch from'stnrtmg to running position."

[ f flew? Gazette November 23, 1.920.}

ilisclaimc i l l l l l l DISCLAIMER- 1,291,567.A.Zbert P. Ball, Royal Oak, and Frederick Ze'ntfer, Highland Park, Mich.

[ f flew? Gazette November 23, 1.920.}