US733499A - Presser-foot for sewing-machines. - Google Patents

Description

No. 733,499. PATENTED JULY 14, 1903.

A. A. *MBRRITT.

PRESSER FOOT FOR SEWING MACHINES.

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UNITED STATES latented July 14, 1903.

ATENT nFrcE,

ARTHUR AUGUSTUS 'MERRITT, OF NEWV YORK, N. Y., ASSIGNOR TO THE UNION SPECIAL SEWING MACHINE COMPANY, OF CHICAGO, ILLINOIS,

A CORPORATION OF ILLINOIS.

PRESSER-FOOT FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 733,499, dated July 14, l 903.

Application filed November 9, 1901. Serial No. 81,758. (No model.)

To all whom it may concern:

Be it known that I, ARTHUR AUGUSTUS MERRITT, a citizen of the United States, residing at New York city, in the county of New York, State of New York, have invented certain new and useful Improvements in Presser- Feet for Sewing-Machines, of which the following is a description, reference being had to the accompanying drawings and to the letters of reference marked thereon.

My invention relates to that class of presserfeet in which the foot proper has rocking movement to accommodate itself to the work.

The object of the present invention is to provide a double presser-foot in which the feet proper, in addition to their rocking movement, are pressed by independent springs each having its own adj usting-screw, the said independent springs allowing the pressure of the two feet to be independently increased or diminished apart from the pressure of the usual spring bearing on the presser-foot bar. This object is accomplished by the construction illustrated in the accompanying drawings, in which Figure l is a front perspective view of my improved double presser -foot. Fig. 2 is a side elevation thereof, and Fig.3 is a detail of the presser-foot block or head.

A designates the presser-foot block or head, provided, as usual, with the vertical opening a to receive the presser-foot bar, and a setscrew a, intersecting said opening to secure the head to the bar.

B B are two independent vertically-disposed bell-crank levers, pivoted at their angles to the sides of. the head or block A by means of the two pivot-screws b b.

C C are the presser-feet proper, pivoted between their ends, as at c, to the forward ends of the horizontally-extending arms 1) b of said bell-crank levers, the upper faces of the feet having guide-flanges c c, embracing the arms I) b to prevent lateral movement of said presser-feet. As the shoes or presser-feet proper are pivoted just in rear of their middle portions to the forward ends of the forwardly-projecting arms or rocking portions 1) b, said shoes will be held normally horizontal, as their forward ends are the heavier. The shoes are thus properly counterbalanced.

D D designate V-springs mounted at their bends on pins 01 d, projecting from opposite sides of the block or head A in rear of the lever-pivots b b, and the upper ends of the forward members of said springs bear against the rear sides of the vertical arms b b of the levers B.

E E designate two horizontal adj ustingscrews extending through an arm a on the upper rear portion of the head A and hearing at their inner ends against the rear members of the springs D, sov that by turning the screws in or out the pressure of the springs may be increased or diminished. In order that the springs may not throw the bell-crank levers too far down when the head is lifted, and so prevent the lifting of the presser-feet 01f the work, I provide the head on its opposite sides with two stop-lugs a a against which the lower ends of the rear vertical edges of the bell-cranks contact, as shown in Fig. 2.

This construction will prove useful where difierent thicknesses of work lie under the two presser-feet. Presser-feet mounted on bell-crank levers fulcrumed at their elbows, as shown, overcome the cramping and binding common where attached to vertical bars. As the lifting force from actions of the feeddog and variation in thickness of work is applied necessarily at some distance from the center of the vertical bar and against the under side of the presser-foot, it is obvious that a presser-foot mounted, as shown, to bellcrank levers must yield better to meet requirements than could be possible if the presser-feet proper were rigidly secured to the yielding vertical bar.

Having thus described my invention, what I claim as new, and desire to secure by Letters 7 Patent, is-

1. In a sewing-machine presser-foot, a main shank or head, a forwardly-projecting springpressed rocking portion or lever pivotally attached to said shank or head, a horizontallydisposed shoe or presser-foot extending under said rocking portion and pivoted between its ends to the forward end of said rocking portion, whereby it bears upon the work upon both sides of its pivot-point, and connections between the rear end of the foot and the rocking portion, whereby its forward end is prevented from dropping when elevated above the work.

2. A presser-foot, comprising a head or support, and two pivoted independent presserfeet, each having an independent springpressed carrier or support pivotally mounted on the said head, and means for adjusting each spring independently of the other; substantially as described.

3. A presser-foot comprising a head or support,two independent levers pivotally mounted thereon, presser-feet pivoted to said levers, independent springs bearing on said levers to hold the feet down to the work, and a screw for each spring to increase or diminish the pressure thereof on the levers; substantially as described.

4. A presser-foot comprisinga head or support, two bell-crank levers pivoted at their angles to the opposite sides of the block, presser-feet pivoted between their ends to the forward ends of the said levers, springs hearing against the vertical arms of the levers,

and spring-regulating screws mounted on the block; substantially as described.

5. A presser-foot comprising a head or support, two bell-crank levers pivoted at their angles to the opposite sides of the block, stoplugs on the block to limit the movement of the levers, presser-feet pivotedto the forward ends of the levers, springs pressing the upper ends of the levers forwardly, and aseparate regulating-screw for each spring; substantially as described.

6. A presser-fo0t comprising a head or support, two bell-crank levers pivoted at their angles to the opposite sides of the block, presser-feet pivoted to the forward ends of said levers, V-springs mounted at their bends on pins projecting from the sides of the head and engaging with their forward members the vertical arms of the levers, and horizontal screws mounted in the upper end of the block and engaging the rear members of said springs; substantially as described.

In testimony whereof I aflix my signature in presence of two witnesses.

ARTHUR AUGUSTUS lllERRl'lT.

Witnesses:

W. H. BOYER, W. E. WEAVER.

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