US974106A - Electrical switch. - Google Patents

Description

.A. F. FURBUSH. ELECTRICAL SWITCH. APPLIOIATIOH 111.211 JULY 7,1910.

Patented 001. 25, 1910.

INVEVTOR. I iZUVw hw/ WITNESSES:

f OFFICE.

mom; I. IUIB'UBH, OI CLII'IONDALE, MASSACHUSETTS, ASSIGN'OB '10 AID 'w. HALE, OF HARTFOBD,

mom-moan swrrcm 974 v i specification o Letter: htent. Patented Oct. 1910- 2' Application an Jul 1,1910. Serial No. 570,752.

To all whomkit may concern: I supported b legs 13 and 14 in any desired Be it known that I, Annomnm F. Funmanner. T e head of the sewing-machme BUSH, a citizen of the United States, and comprises a needle-shaft on which is mountresident of Cliftondale, in the county of ed a pulle 15 which is connectedebiy a belt 6 Essexand State of Massachusetts, have in 16 to the rivingfiulley 17 mount on the so vented certain new and usefulImprovements shaft of a motor in Electric Switches, of which the following 'Secured to the leg 13, is a plate 20 which is a full, clear, and exact specification. should be made of. insulating material This inventionrelates to electric switches adapted to, support the stationary contact 10 and more especially to that class thereof points 21, 22, and provided with a dove-- as 'whi are adapted to control the flow of a tailed groove to support for reciprocatory power-current whereby a motor may be' movement therein a' slide S also made of 'ven, such niotor being in the resent 1nmsulating material and carrying the movstance'utilized for the purpose 0 actuating able contact points 23, and 24. The latter .15 a se '-machine.' I v are adapted to cooperate with the contact The invention has for one of its objects points, 21, 22 respectively, above referred the provision of such a switch which may be to, the o anization being such that when operated by atreadl the back and forward the slide '1s It's lowermost position as motion of which shis the movable switch; shown in Flg. 2 both sets of contact-points 2o. member intoand out of cooperation with "Fire clear from each other; while on the J6 Y the roper terminals of the device. other hand, when the slide S is in its upper- I e mvention has, furthermore, for its most position, as shown in Fig. 4, bothsets ob'ect the provision of a fuse or similar of contact-points arecooperatively connected; 'sa ty-device which is carried on the movwith each other, res ectlvely. l6 able switch-member and mag be readily reg In order to guar the motor against. in-

after an overload as resulted in Jury by an overload of current, especiall urning out the fuse. when the sewing-machine is standing sti The mventionhas also for its object the I have deemed it advisable to provide a combination with the treadle o rated fuse of-any desired and well-known con- I so switch-member, of .meanswhereb'y t e curstruotm'n, wherebyv the movable contactrent will be interrupted by the movement of points 23, 24, may be electrically the switch-member only after the treadle and which may be readily inserted-into, or

has been moved for some distance, after removed from, its place in said contact which the movement of the-switch-member pomts by virtue of the resilient construc- I as 'takes place very ralpidly so as to break the tion of the latter which includes springcurrent without li ility of sparking at the clips 25, 26, formed on the contact-members contact points. 23, 24, respectively. It should be under- The invention has been clearly illustrated stood, however, that I do not confine myself' in the accompany'ng d i in hi h to the use of this articular form of fuse,

40 Similar characters denote similar parts, and s nce any other wel -known form of pl or 9.6 in which similar article may be employed In ieu Figure 1 is a side view of a sewing-mathereof. chine illustrating the general organization Electric circuit to the motor is established of the 'switclrfan driving mechamsm. F as follows :.The main line 30 is conn ted 45 2' is a front view of my improved switc to the stationary terminal 21, and the cut- Y 3 is 'an' edge view thereof partially rent.. ro

thence through the movable teren away to disclose the construction, mma 23, the fuse F, movable terminal 24, and Fig. 4 is a front 'view of the switch the stationary terminal 22, to the motor line similar to 2but illudzrating the switch- 31, the motor M, and to the return line 32. 1 60 member in e 'tion whic .it assumes In order to prevent arking at the trmi- 10 when current is owed to flow to the motor. nals when the slide S is moved downward In the drawmgs,-the numeral 10 denotes from the position shown in Fig. 4 to that the head of lawmge mounted on shown in Fi 2, means are provided -for a base 11 which resented within the to ma he! the 'de 8 in its u ward position a or tabla 12 of machine, the latter 7 until treadle has been epressed sufii- 1 held in its positlon by a spring 39 attached :35 ited.

'Yagainst a collar '51- which is rigidly secured ing position'until the lug 49 thereof is enciently .to tension a spring which, when the l slide Sis linallyreleased, will rapidly more i the latter downward to break the circuit; To-this end, I provide the base-plate 20 with 1 8 an extension 35, to the lower end of which ;(as at 36) is pivoted a dog 37 having a top .face 38 adapted to projectunder the lower edge of the-slide somewhat after the manner shown in Fig. 4, the dog being normally to the side of the base-plate 20. a The slide is provided at its lower end with -an extension rod 40-, on the lower end oi which is slidably supported a collar 41 to which is articulated the upper end ofa connecting-rod 42, the lower, end-0f which is fastened-to the ear-43 of a treadle 44. 'If desired, the connecting-rod42 may be made in two sections which are joined by. a connectin '-slee'v e,45 (see Fi 1) which permits the r '-sections to be ad justed relatively to each other so as to bring the treadle into. the desired position when the slide s is in its normal condition. Referring to Fig. 4, in

which the slide S is illustrated as being in itsuppermost position, it will be noted that a sfiring 46 surrounds the rod and norma y holds the collar 41 against a collar 47 which is stationary on the rod .40. The 30 collar 41 has also a side-extension 48 adapt-' ed to engage a lug 49 providedon the dog 37, so that. in this manner the upward movement of the slide S, or more particularly speakin that of the collar 41, will be lim-- n a similar manner, the downward movement of the collar 41 is limited by a lug 50 also formed on the dog37 and adapted to be engaged by the projection 48 of the collar 41 during the downward travel there- 40 of. Now it will be seen that when the treadle 44 is moved to pull theconnectingrod 42 downward, the collar-41 'will'also :niove downward and thus compress the spring 46 the lower end of which rests to the lower end of the rod 40. During the first portionof the travel of the'collar 41, however, theslide S-is held stationary the dog 37 which will remain in its engag gaged by a cam-plate 52 forming a part of the collar 41. By the time this engagement takes place, the spring 46 will be under tension,'so that, as the collar 41 continues in 55 its downward movement, the cam-plate 52 will swing the do 37. around its pivot.36 and away from un er the slide S, which will thus be set at liberty and be rapidly pulled downward by virtueof the compression of the spring 46, this position beingclearly shown in Fig. 2. When'the slide S is to be raised'to bring the contact-points thereof into cooperation with the stationary conv tact-points of the base-plate 20, such movement can readily be accomplished by me"..-

-'of a fuse-member connecting the contactthereof.

' switch-member, a-pair of contact-points carried thereby andinsulated from each other,

ing the treadle 44 which will lll|]l1%.ll2ki0l raise the slide by virtue of its contact with the collar 47. p

Many changes may be made in the particular'construction and organization of the several component elements of the device without departing from the spirit or gist of the-invention, and I wish it to be dis- 'tinetly understood that I do not gonfine myselfto the particular form of the fuse-hold ing clips herein shown and described, or to the particular construction and organization of the slide-retaining and propelling meansabove referred to as long as such elements come within the scope of the appended claims.

1. The combination with a base-plate, a pair of contact-points stationary thereon andinsulated from each other, a slide mow able on the base-plate, and a pair of contact-points carried'by said slide and insu-Z lated from each other, of a fuse-member connecting the contact-points of the slide, means for reciprocating said slide, and a device normally locking said slide against movement and operable to release such slide during and by the final movement of the reciprocating means. -2.1The combination with a base-plate, a

pair of contact-points stationary thereon and insulated from each other, a movable switch-member, and a pair of contact-points carried thereby and insulated from each other, ,of a fuse-member connecting the contact-points of the movable switch-member, means for reciprocating the switchmember, a imechanism for locking" said switch member against movement during the initial movement of the actuating mechanism and for releasing said movable switch member near th'e'end of the movement of j said actuating mechanism.

3. The combination with a base-plate, a pair of contact-points stationary thereon and insulated from each other, a movable switch-member, a pairof contact-points .carried thereby and insulated from each other,.

points of the movable switch-member, means for reciprocating the switch-member. a' mechanism for locking said 'swit'ch'member against movement during the initial movement of the actuatingmechanism and for releasing said movable switch'member near the end of the movement of said actuating mechanism, and a spring for moving said switch-member subsequent to the release I 4., The combination with a base-plate, a pairof contactpoints stationary. thereon and insulated .from each other, a movable of a fuse-member connecting the contactmovement, a spring interposed between said points of the movable switch-member, means collar and slide, and means for actuating 10 for reciprocating the switch member, a dog said collar. ivoted on the base-plate for normally lock- I 5 lug" said switch-member against movement, ALBOURNE l a collar having a cam-projection adapted Witnesses: to'engage said dog to release the movable WARREN HALE, switch member during the end of the collar l O. F. SO'HMELZ.

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