US2125043A - Presser-foot for sewing machines - Google Patents

Description

July 26, 1938. F. M. CARD 2,125,043

PRESSER-FOOT FOR SEWING MACHINES Filed March 27, 1937 gwuczwfm Frederic JZ Card Wkfheoo:

Patented July 26, 1938 4 UNITED STATES PATENT oFncE 2,l25,043 I PRESSER-FOOT FOR SEWING MACHINES Frederic M. Card, Bridgeport, Conn, assignor to The Singer Manufacturing Company, Eliza- Beth, N. J., a corporation of New Jersey Application March 27, 1937, Serial No. 133,374 8 Claims. (01. 112-235) This invention relates to improvements in foot-plate I2 is provided with a needle-clearance. presser-feet of sewing machines and more parrecess I 4 which is preferably open at the inner ticularly in the compensating type of presserside edge I 5 of said foot-plate, said side-edge feet in which an equalizing device is interposed being partly cut away in the upturned toe it of 5 between relatively movable work-engaging footthe foot-plate I2 to facilitate directing work 5 plates of the presser-foot to maintain uniformity against the inner side edge ll of the foot-plate of pressure upon different thicknesses of work. l3. Obviously, the toe l8 of the foot-plate l3 The present invention has for its object to inmay also be cut away in its inner side edge I! crease the responsiveness of the work-engaging to facilitate the use of the inner side edge l5 of 10 members of a compensating presser-foot to varithe foot-plate I2 as an edge-guide for the work. 10 ations in the thickness of the material engaged Threaded into the front face of the block i, thereby, and to this end the component partsof between the leg-members 5, is a shouldered screw the presser-foot' are constructed and arranged to 19 upon which is fulcrumed a two-armed equalminimize cramping action in the response of said izing-lever 20 for rocking movement about a parts to differences in the thickness of the work. horizontal axis transverse to the fulcrum-axis of 15.-

The invention will be understood by reference to the leg-members 5. The lever is disposed in the accompanying drawing, which illustrates a front of the block I and is cut away so that the preferred embodiment of the invention and in two arms thereof present flattened lower faces wh1ch:- overlying and in direct engagement with the 20 Fig. 1 represents a perspective view, partly in upper edges of the leg-members 5. 'In order to 20 section, of the presser-foot. Fig. 2 is a side eleinsure operative engagement of said equalizingvation, partly in section, of the same. Fig. 3 lever 20 and leg-members 5, the upper edges of represents a section of the presser-foot substansaid leg-members are recessed rearwardly of the tially on the line 3-3 of Fig. 2. Fig. 4 repreleg-member fulcrum-pin 6 to receive coil-springs sents a section of the presser-foot substantially 2| reactingvagainst the upper walls 22 of the slots 2 on the line 4-4 of Fig. 2. 3 and 4, thereby yieldingly holding the forward Referring to the drawing, the presser-foot ends of the leg-members 5 inengagement with has a body comprising a substantially rectanguthe equalizing-lever 20. The slot walls 22 also lar block I preferably integral with the lower end function as stops limiting upward movement of of a flat shank 2 adapted to be attached to any the forward ends of the leg-members 5. 30 usual or suitable presser-bar of a sewing ma- It will be understood from the foregoing dechine. (Not shown.) scription that within their range of relative The shank-block 2 is provided lengthwise movement, the foot-plates I2 and I3 are free to thereof with a pair of substantially parallel and adapt themselves to diflerent thicknesses of work vertically disposed guide-slots 3 and I, which are respectively engaged thereby and to ride cross- 35 preferably cut into said block from the under seams, while maintaining a substantiallyuniform, side thereof so as to be open at the bottom of the pressure upon the work. By arranging the comblock. Slidingly disposed in the respective. ponent parts of the presser-foot so that the guide-slots are relatively movable and preferably equalizing-lever 20 is in direct engagement with 4 flat-sided leg-members 5, each pivotally attached the pivotal leg-members 5, and by eliminating 40 to the block I at the rearward end thereof by the vertically sliding guide-plungers heretofore means of a transverse and horizontally-disposed commonly employed in compensating presserfulcrum-pin 6. The fulcrum-pin 6 is secured to feet, cramping of the parts is substantially elimi- Said block y a Set-Screw 1 and p ov des a coaxi l nated and the foot-plates are free to relatively pivotal support for said leg-members. respond to variations in the thickness of the 45 At their rearward ends, the leg-members 5 are work. each shouldered to provide an upwardly extend- Having thus set forth the nature of the invening stop-lug 8 adapted to engage the rear face of tion, what I claim herein is:- the block I, thereby to limit downward move- 1. A presser-foot for sewing machines, com- .50 ment of the forward ends of said leg-members. prising a body, a pair of leg-members coaxially The leg-members 5 e end o w rd y bey d pivoted to said body, foot-plates pivotally atthe block I and have reduced free ends whi h tached to and carried by the respective-leg-memare transversely ape tur d o receive p ns 9 p vbers, and an equalizing-lever fulcrumed between. Otally pp r the upstanding Spaced l In its ends upon said body in position for direct and II of adjacent foot-plates l2 and Th engagement with said leg-members. 65

2. A presser-foot for sewing machines, com-e prisinga body. a pair of leg-members coaxially pivoted; to said body, foot-plates pivotally attached to and carried by the respective leg-memhers, an equalizing-lever fulcrumed between its endsupon said body, and means yieldingly holding said leg-members in engagement with said lever.

3. A presser-foot 'for sewing machines, comprising a body having a shank and a block integral with said shank, a pair of forwardly extending leg-members pivotally attached to said block at the rearward end thereof for relative movement of said leg-members about a substantially horizontal axis, foot-plates carried by the forward ends of the respective leg-members, an equalizing-lever in direct engagement with said leg-members and fulcrumed between its ends upon said block for rocking movements about a sub-, stantially horizontal axis transverse to the pivotal axis of said leg-members, and means for holding said leg-members in engagement with said equalizing-lever.

4. A presser-foot for sewing machines, comprising a supporting shank, a block carried by said shank, a pair of forwardly extending legmembers pivotally attached to said block at the rearward end thereof for relative movement of said leg-members about a substantially horizontal axis, foot-plates pivotally attached to and carried by the forward ends of the respective legmembers, an equalizing-lever in operative engagement with said leg-members and fulcrumed between its ends upon the front end of said block for rocking movements about a substantially horizontal axis transverse to --the pivotal axis of said leg-members, and means limiting downward movement of the forward ends of said leg-members.

5. A presser-foot for sewing machines, comprising a shank-body formed with substantially parallel guide-slots, leg-members slidingly disposed in said guide-slots and pivotally attached to said body at the rearward end thereof, footplates carried by the forward ends of the respective leg-members, an equalizing-lever fulcrumed between its ends upon said body in overlying engagement with said leg-members, and yielding means for holding said-leg-members in engagement with said equalizing-lever.

6. A presser-foot for sewing machines, comprising a shank-body formed with substantially parallel guide-slots, leg-members slidingly disposed in said guide-slots to extend forwardly from said body and having a coaxial pivotal support upon said body, foot-plates pivotally carried by the respective leg-members, an equalizinglever fulcrumed between its ends upon said body and having its arms in operative engagement with said leg-members, springs housed within said body and bearing upon said leg-members to hold the forward portions of said leg-members in engagement with said equalizing-lever, and means limiting movements of said leg-members in opposite directions.

7; A presser-foot for sewing machines, comprising a shank-body formed lengthwise thereof with substantially vertical and downwardly open guide-slots leg-members slidingly disposed in said guide-slots to extend forwardly from said body and having a coaxial pivotal support at the rearward end of said body, stops carried by the respective leg-members for engagement with said body and thereby to limit downward movement of the forward ends of the respective leg-members, an equalizing-lever fulcrumed between its ends upon the front end of said body and having its arms in overlying engagement with said legmembers, and springs bearing upon said legmembers to hold said leg-members in engagement with said equalizing lever.

8. A presser-foot for sewing machines, comprising a shank-body, a'pair of forwardly extending leg-members pivotally attached to said body at the rearward end thereof for relative movement of said leg-members about a substantially horizontal axis, foot-plates pivotally carried by the forward ends of said leg-members, and a legmember equalizing-lever disposed forwardly 'of' the front face of said shank-body and fulcrumed between its ends upon said body for rocking movements about a substantially horizontal axis transverse to the pivotal axis of said leg-members.

FREDERIC M.v CARD.

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