US863491A - Sewing-machine throat-plate fastening. - Google Patents

Description

PATENTED AUG. 13, 1907.

No: 863,491c

W. M. AMMERMAN. SEWING MACHINE THRQATPLATB PASTENING.

APPLIUAT1DNIILED 1320.4. 1905. v

.7, UNITEDA STATES PATE WILLIAM M. AMMERMN, OF NEW HAVEN CONNECTICUT, ASSIGNOR TO THE EDvll NEW HAVEN, CONNECTICUT, A

NT OFFICE.

CORPORATION Ol` NEW JERSEY.

SEWING-MACHINE THROAT-PLATE FASTE N IN G.

Application filed December 4,

.Specification of Letters Patent.

Patented Aug. 13. 15?? 1905. Serial No. 290,059.

To all whom it may concern:

Be it known that I, WILLIAM M. AMMERMAN, a citi- The invention has for its main object to promote sewing machine bed-plate, whereby the same needle plate may be removed and replaced, or whereby one needle plate may be substituted for another, and may be secured preferablyr by both primary and secondary locking means during use ofthe sewing machine.

The invention further includes au arrangement of the primary locking device relatively to a movable portion of the machine bed-plate to support the same; all as hereinafter described and particularly pointed out in the claims. i

Reference is made to the accompanying drawings forming part of this specification, and in which Figure l is a plan view of the end portion of a sewing machine bed-plate with the improved needle or throat plate applied and locked thereto. Fig, 2 is a longitudinal vertical section, taken on line 2-2 in Fig. l. Fig. 3 is a transverse vertical section, taken on the line in Fig. l; and Fig. 4 is a bottom plan view of the detached needle or throat plate.

A[n the drawings, the numeral l indicates the main bed-plate of a sewing machine which has an end openingI 2, normally closed by a movable auxiliary bedplate portion which is shown hinged by pins 4, Ll, pivoted in the plate l at opposite -sides of the opening 2. lhls plate 3 may otherwise be made movable or removable to conveniently expose to the operator from the upper side of the bed-plate the shuttle or looper mecha nisin arranged therebelow in order to facilitate any dcsired change or adj ustment of parts.

lt is a usual practice to fasten the needle or throat plate of sewing machines to the mainbed-plate by one or more screws requiring use of a screw-driver or special auxiliary tool to remove the needle plate last used and plate as the work being donc may suggest or require. This old method of fastening a needle plate is inconvenient for most operators and also consumes time which otherwise ntghtfbe used with better results. These disadvantages are obviated by this invention which provides for quick and easy substitution of one needle or throat plate for another without using auxiliary hand tools, and also preferably provides for a double-locking of the needle plate when adjusted for use on the machine.

The improved needle or throat plate 5 tits within a rabbeted opening of the main bed-plate l, and has the usual general form of priorplates of this class, and is provided with a needle slot or passage '7, and work feeding mechanism slots S, 8. At one lateral edge the plate 5 preferably has a lip or 'lug 9, shown in the prestent case ais struck ont from the upper surface of the plate, which is adapted to t snugly within a lateral recess l0 made in the bed-plate l. Preferably at e. pointdirectly opposite the recess l0 there is fixed to the bed-plate l and within its opening 6, a detent preferably formed as a stud or pin ll having au enlarged head l2 providingunder it a groove 13 receiving the direct or primary locking device of the needle plate,- which plate has a hole or passage 14 into which the stud head 12-l3 may enter freely.

The primary locking device may have various forms provided a portion of it is adapted to `enter and leave the groove v13 of the stud 1l. A preferred primary locking device comprises a lever 15 having its locking head 16 fulcrumed on a pin 17 fixed to the under side ofthe needle or throat plate 5. The leverhcad i6 is cut away marginally and preferably on a concavcd are 18 corresponding with the curved wall of the nccdlc plate opening 14. It is preferred to extend the lev'ct l5 late rally outward from its head l'in an elongated loop 19 which normally projects beyond the edge of the throat plate and forms a handle for conveniently turning the lever for locking and unlocking the needle or throat plate 5, aud for conveniently lifting said plate 5 from th'e bed-plate recess 6. lhe laterally projecting handle loop 19 also forms a rest for the inner free edge of the closed auxiliary bed-plate portieri 3. When said nos dlc or throat plate 5 is applied within the main hedplate opening 6 and thc lever headvlt has been adj usted to lock the applied plate, a pin o1sl1ouldcr20 fixed to or at the under side-ot' the lOl:-

vide a secondary positive lock preventing turning,l o the primarily locked lever 15.

Should it be desired for any reason to remove the needle or throat plate 5, the auxiliary bed-plate portion 3 will be swung over outward upon its pivots 4,

or will be bodily slid or removed if arranged lor either of these adjustments. Such operation o the plate 3 removes its pin or shoulder 2O from locking position in front 0l the handle portion 19 ol the lever 15 and allows said lever to be turned upon itsfulcrum 17 until its handle 19 ranges about parallel with the section line 2--2 in Fig. 1 oi the drawings, or in a similar position indicated by thc lull lines ol' the detail bottom plan view, Fig. 4. v This movement of the lever carries its head 16 out oi the groove 13 o the det-ent or headed pin 11, and causes the concaved edge portion 18 of the lever head `to register with the adjacent wall of the ncedlo-plate hole 14, thereby releasing the primary lock and permitting the needle or throat plate 5 to be easily 20 lifted from the detent or headed pin 11--127 by the .handle 19, while the plate l'ip 9 slips laterally from the bed-plate recess l0. To permit replacement of the same needle or throat plate 5 alter it has been removed to facilitate inspection or adjustment of the subjacent sewing mechanism, or to substitute for said removed needle plate another and differently formed one, it is only necessary to hold the desired needle plate by its laterally extended lever handle 19 While applying said needle plate within the bed- )late opening 6 as the/lip 9 ol said plate 5 slips into the bed-plate recess l0, and as the opening 140i the replaced or substituted needle plate 5 receives the bed-plate pin 11-12. This being done, the lever 15 is returned to its original locking position shown by dotted lines in Figs. 1 and 4 oi the drawings, and thereby the lever head 16 is again turned into the lstud or detent groove 13 to primarily llock the replaced or substituted needle or throat plate 5 to the bed-plate 1. The auxiliary end bed-plate portion 3 will then be swung over on its pivots 4 to close pla-te opening; 2 and -will rest upon the lever handle 19 and will conceal and protect the primary locking lever 15, `while simultaneously causing the pin or shoulder 20 on the plate 3 to effect the secondary locking o-the needle or throat plate 5 by standing in iront of the lever 15 to prevent turning of it to unlocking position; This last named secondary locking effect would be assured it' the auxiliary movable bed-plate portion Shaving the pin or shoulder 20, was 'made movable bodily or was fitted in slides or was otherwise arranged lo give access to the lower sewing mechanism or to the needle plate locking lever or device 15, as will readily be understood. l

Various Inodilications o this invention may be made by the skilled mechanic Within the scope of any one or more of the appended claims.

i l claim as my invention:

1. In sewing machine needle or throat plate fnstcnings, the combination with a needle plate, oi .fr dctent on the machine bed-plate, and a locking device movably held to the needloplate and adapted to engage the said (intent for locking the needle-plate to the bed-plate, the said locking device being provided with a projecting part serving as a handle to the needle-plate for use in moving said needle plate to and from its position on the bed-plate.

sealer 2. ln sewing machine needle or throat plate asienings, the combination with a needle pluto havin- T nu opening. of a deteni' on the machine beilplnie :ulnpti-d lo said noodle plate opening. :md n locking.: device movnbly held to the needle plato und :irluptcd to engage the said deteut for locking;v the needle pluto to ihrl heil-plau-A I'. ln sewingl muchiml needle or throat pluto fzistcniugs. the combination with u needle-pluie. ol' :i leicht ou the b1. opluto, an engaging lip :ind recess :il the bed-plate und needle-plate. om :i locking device movnbly hold to the needle-plaie and adopted to one'uo'c thc said loir-ul l'or locking the needle-pluie to thi` bed-pluto. the .snid locking' device being provided with a projecting' pui-t sorvilm' as :i handle io the needle-pluto for us(- in moving' said needleplate to and from its position ou the bod-plate,

4, In Sewing machine needle or throat plate fzistcnine's. the combination with a needle-plate having an opening, ol a dctent on the bed-plalc adapted 1o said needle-plete opening', :in engaging lip and 'recess al' the bed-pluie und needle-pluto. und u locking device movnbly held ro the needle-plate und adopted to engage the said delent for locking.,r tin` needle-plate to the bed-plato.

In sewing machine noodle or rhrontlplaie fasteningA the combination with n needle-plato. a detcnt on the machine bed-plate. a locking device movably held to the needle-plate and adnptrd to ongug'ethe said detour for primarily locking' the needle-pluto to the bed-pluto. anu :in auxiliary movable hed-plate portion having a dctent normally securingthe needle-plaie locking device :it locked adjustment.

G. In sewing' machine ncedh` or throat plate fastenings.

the combination with a needloplate having an opening'. :i i deteni on thil m-.ichiru` bed-plate adapted to said opening', 1l n locking. dcvicl` nxoynbly held to the needle-plate und l adapted to engage the said durent for primarily locking' the needloplute to the bcdplnte. and :in auxiliary movable bod-pluie having; a dctcnt normally securing the needlel plate locking.: device ai locked adjustment.

'i' ln sowing machine needle or throat plate fastenings. the combination with a needle-plate having un opening'. oi' :in undercut or laterally grooved stud lixod to .the machine bed-plate :md adapted to said needle-plate opening. and :i lever fulcrumed to the formed for movement out of and into register with the needle-plato openingr und adapted to engage and disenguge locking; und unlocking the needle or throat plate.

8. ln sewing machine needle or ihr-oat plate fasteninn's. combination with a needle-plate having' an opening'. I erooved stud fixed to the the grooved stud for 'the and an undercut or laterally i machine bcd-plate und adapted to said needle-plate oponing. a lever full-ruined `to the needle-plate and having' n portion formed for movement out of and into register with the needle-pluto opening; sind adapted to eng-ngo :ind disengunc the grooved sind for locking and unlocking the noodlr` i plate, and an engaging lip and recess at the machine beill plate and needle-plato. l (l. ln .sowingr machine noodle or throat plate tnsrenings. a needle-plate having an opening'. and un undercut or laterally groovcd stud fixed to the machine bed-plato and adapted to said needle-plan` opening. n lever fnlcruined to the needleplate` and having- :1 portion formed for movement out of and into register with the nccdloplatc openingl and adapted to engage und disen- ,c'zig'e the grooved stud for locking und unlocking; thil needle plate, and an auxiliary movable bed-plate portion having a pin or shoulder normally securing the primarily locked needle-phite lever.

10. ln sewing machine needle or throat plate fastcnings, the combination withl the machine bed-plate having,r a movable portion. of a needle or throat plate adapted to said` bed-plate. a. dctent on the bed-plate, and a locking lever held to the needle-plate and adapted to engage the detent und normally projecting' laterally beyond the Inarixin of the needle-plate and forming a rest for the closed movable portion of the bed-plate.

1l'. Sewing machine needle or throat plate fastenings [comprising a primary locking device securing the needlethe combination with needle-plate und having." a portion plate to the machine bed-plate which has an auxiliary movable portion, and apin carried by the movable bedplate portion and normally securing the primary needleplate locking device at locked adjustment. h

5 12. In sewing machine needle or throat plate fastenings the combination with a needle plate, of a detent on the machine bedf-lplate, and a locking device movably held to the needle plate and having a part thereof adapted to engage the said detent for removably locking the needle 10 plate to the bed-plate and having another part thereof normally projecting laterally beyond the margin of the needle plateand serving as a handle both to the locking device and to the needle-plate, for the purpose set forth.

Signed at New Haven, in the county of New Haven and State of Connecticut, this 25th day of November, A. D. 15

Y WILLIAM M. AMMERMAN.

Witnesses z WM. H. H. Hnwrr'r, WARD CHURCH.

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