US1315243A - Presser-eoot-opening mechanism - Google Patents

Description

W. SHAW.

PRESSER FOOT OPENING MECHANISNI.

APPLICATION FILED DEC. I1. 1911.

1,315,243. Patentedsept. 9,1919.

' equipped with iiNrrEn sTATEs PATENT cierren WALTER siiAW, or DEDHAM, MASSACHUSETTS, `AssieNoia To UNITED SHOE MA- oiriNEaY CORPORATION, or rATERsoN, NEW JERSEY, A conroiaATioN or NEW JERSEY.

.i i Specification of Letters Patent.

rEEssEE-EooT-OPENING MEciiANisivi.

rai-.enten sept. e, isis.

Appnceupn inea Deeember i7, i917. serial No. 207,536.`

To all LU/wm it may concern:

ham, in the county of Noriolkand Stateof ',Massachusetts, have invented certain Improvements in Presser-Feet-Opening Mechanisms, of which the following description, in connection with the accompanying drawings, is a specification, like reference characters on the drawings indicating likeparts in the several gures.

This invention relates to fastener Yinserting `machines and, more particularly, to those elements which guide and clamp the work while it is being fed and maintain it in proper position whenitis at rest. e The invention is of particular utilityyin connection with duplex eyeleting machines which are arranged for corset work and, `although it will become obvious that` its field of use is not limited to this particular machine or class of machines, the problemw will be considered as it arose inconnection with suoli a machine. ,e e e Duplex eyeleting machines are commonly clamping members on presser feet of the type shown in Letters Patent of the United States No. 1,030,833, .Granted June 25, 1912, upon the application of F. A. R-umney. The work is inserted `between these clamping members by sliding it edgewise between them, whether they are used with or Without an intermediate plate such as that disclosed in the cofpending application of F. A. Rumney, Serial No.

" 857,760, filed Aug. 20, 1914:; With certain types of work,`however`, notably corsets in which heavy bones have been inserted or corsets having no bones, considerable effort required to push the workintoplace. An object of the invention is to provide novel and convenient means for separating the work guiding and clamping membersto facilitate the insertion of work.

Various arrangements of presser `ieet have been suggested in which the two `clamping members were articulated or otherwisefiiiterconnected so as to be incapable ofmoving independently of each other. 4'This made the opening oil the clamping members a simple matteras retraction of one memberwould cause corresponding movement of the other. Such arrangements, however, involve the difficulty that an increase inthe thickness of one of the two supc-iposedlayersof work .willcause `the tension to be lessened upon theother layer with the result that the feeding movements imparted to the twopieces of work may not beequal and hence that the eyelets which are set may not be located exactly" opposite toeach other.

`Afeature of the invention relates to an arrangementl of the presser feet opening mechanism which will avoid such diiiculties while allowing independent actionof the presser feet as heretofore, thus retaining the well known advantages of Such action; the .construction and arrangement, as shown, bein gV -such that equal separating movement will beyimparted tothe presser i'eet regardllessroftheirrelative positions prior to the separating" movement.

.lnthe illustrated arrangement the presser feet are` `interconnected wby, a manually position when the tension is" applied, and

whicharealso constructed and arrangedto allowindependent movement of the presser `feet 1when the flexible member isunder tensionfand to allow conjoint movement of the presser feet regardless of whetheror not y the flexible member is tensioned.

Other features of the invention relate to the` connections between the" tensioning means, here illustrated as a foot treadle, and the presser feet separating means, `which connections are arranged t0 prevent the unintentional transmission of tension from the treadle to the separating means and which are also provided with means for preventing the separating means from becoming unduly slackened` under `the action of a spring inserted `in the connections.

In the following specification and the accompanying drawings there is described and illustrated a specific embodiment of the in-` the United States No. 1,231,201, ,granted June 26, 1917, upon the application of F. A. Rumney.

Fig. 2'is a fragmentary section through ghe work support adjacent tothe presser eet.

The machine is ordinarily supported upon a bench or table and comprises a main VVframe 12 to which is bolted an auxiliar)T frame 14. In this frame the hammer levers r16,`only one of which is shown, are pivoted.

The operating tools are supported in a 'bifurcated frame 18 which is .pivoted in -one arm ofthe bell crank 20 .for back and forth and lateral vmovement. V are guided by ithe stud 22 in cooperation with vthe track 24. Supported in the frame 18Y and interposedbetween `Athe tools is a combined die plate and punch plate 26 which cooperates with ,the vsets 28 `and punches .30. Suitable hammers 32 and 34 are provided for the :operation .of the sets and punches re- `spectively, ,and it will be noted that .the Vhammers 34 are provided with hooks 36 and l46 capable :of back and forth `adjusting movement when y.actuated a lever 48. ,The operation of separating these presser feetis accomplished by Ytensioning abord, preferably in the form 7of `a wire cable 50 which is attached .at its ends .toV the presser feet .and which passes overa guiding pulley 52 supported .by means of a clamp 4,54 upon the frame 14. This cable valso passes through 4guides 56 lat' `the rear of the work support 40 and 4around the `tensioning pulley 58, which is connected by means of rods 60 .and V.62 and a lever 64 to the crank .66 upon the treadle rod 68. The crank ..66 is attached .to an offset ,70 upon the treadle rod -and a treadle 72 of usual or suitable construction is provided. This treadle is connnonly and preferably also utilized for .tripping `the clutch which starts the machine in operation and is arranged =to effect this Stripping when .its forward or toe end is depressed. A spring 74 is interposed :between the .pulley .58 and the .table yl0 while a stop 76 upon the rod 60'is arranged to limit the lupward movement of said rod under tension of the spring 74.

In Fig. 2, the work .is shown as clamped directly A'between the presser feet 42 and 44 Without the interposition of the `in-tern-iediate plate. The separa-tion of zthese These Y .movements .and presser feet regardless of the action of the manually operated cable tensioning means. Afurther advantage Aof applicants novel arrangement lies in the fact that any movement communicated .to one .of the presser feet, as, for example, .by a variation in thethickness of :the work, will not be communicated through Athe cable 50 to the other presser foot and, therefore, there will be no vtendency .of such inequalities to cause relief in .the wori .clamping ktension exerted by Ithe other presser foot .upon the work. Because of the large number of `eyelets .to vbe set, this feature becomes of particular importance in corset work since it is very .essential that .there be no variation in the feed movements of the :two halves of the work, if perfect alinement of the eyelets in the halves is `to be secured. The spring 74 tends to prevent fthe tensioning of the Vcable ,50 by ,an unintentional pressure of 9 the operators foot upon the heel lend of the treadle 72. Such a pressure might otherwise cause an .undesirable .opening of the presser feet and, therefore, might destroy uniformity of the feeding ei'ect which normally is practised by the machine. The

stop 7.6 ,upon .the .rod 60 will, it will be seen, prevent the cable from becoming unduly slack when the toe end of the treadle 72 is'depressed in vtripping the clutch.

Having thus .described the invention, ywhat .is claimed as new and desired to be secured yby Letters Patent of the -United States is l. Ina fastener-inserting machine, coperative Iwork-clamping -members movable towardand from leach other 4independently vof each other, and means for separating said members .constructed and arranged to equalize the separating stresses applied to said members.

In a fastener-inserting machine, coperative work-.clamping members movable toward and from .each other, and manually operative means connected to said clamping members separately `to retract Leach from vthe other` said means being arranged to equalize ,the .separating stresses applied to said members.

3. Ina fastener-inserting machine, cop- ,erative work-clamping :members movable toward and from each other, iexible means connected to .each of vsaid clamping members separately, and means arranged to .operate said flexible `means to retract said clamping members from each other, said flexible means and said operating means being arranged to equalize the retracting stresses applied to the clamping members.

4;. In a fastener inserting machine,` du plex fastener inserting mechanisln constructed and arranged to operate upon superposed layers of Work, Work guiding mechanism, co-acting superposed presser feet, a cord connecting said presser feet,` and a guiding pulley and an actuating pulley for said cord constructed and arranged to cause a separating movement of said presser feet upon the tensioning of said cord through movement of said actuating pulley.

5. In a fastener inserting machine, coperative presser feet constructed "and arranged to clamp superposed layers of Work, means interconnecting said presser feet constructed and arranged to permit movement of one of the presser feet `indepc-mdently of the other, manually operative means arranged to actuate the first said means to separate the presser feet, and means tending to prevent unintentional actuation of said manually operative means.

6.' In a fastener inserting machine, presser feet constructed and arranged to clamp superposed layers of work, means interconnecting said presser feet constructed and arranged to separate the presser feet, tensioning means for the separating means1 means tending to relieve the tension upon said separating means, and means for preventing said separating means from becoming unduly slaclened,

In testimony whereof I have signed my name to this specification.

WALTER SHAW.

Copies f this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, 1).0.

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