US1300885A - Presser-foot mechanism for sewing-machines. - Google Patents

Description

0. s SEYMOUR. PRESSER FOOT MECHANISM ma swms MACHINES.

APPLICATION FILED APR. 6| I916- 1,800,885, Patented Apr. 15,1919.

2 SHEETS-SHEET lrim W D. S: SEYMOUR. IPRESSER FOOT MECHANISM FOR SEWING MACHINES. APPLICATION, map APR. a. 1916.

Patented Apr. 15, 1919.

2 SHEETS-SHEET 2- a were.

DUDLEY s. SEYMOUR, or OAK PARK, IIJLIIvoIs, ASSIGNOB TO UNION SPECIAL MACHINE COMPANY, OF CHICAGO, ILLINOIS, A CORFORATION OF ILLINOIS.

PRESSER-FOOT MECHANISM FOR SEWING-MACHINES.

Specification of Letters Patent.

Patented Apr. 15,1919.

1 Original application filed December 27, 1915, Serial No. 68,787. Divided and this application filed April 6,

19 1c. Serial No. 89,314.

To all whom z'tjmay concern:

Be it known that I, DUDLEY 'S. SEYMOUR,

a citizen of the United States, residing at Oak Park, in the county of Cook, State of Illinois, have invented certain new and useful Improvements in Presser-Foot Mechanism for Sewing-Machines, of which the following is a description, reference being had to the accompanying drawing and to the figures of reference marked thereon.

The invention relates to. new and useful improvements in presser foot mechanism for sewing machines, and more particularly to the means for-placing the presser foot under pressure. p 1 An object of the presser foot withaleaf spring for forcing the leaf face of the standard whereby a more uniform pressure of the foot against the material on the worksupport for varying thick- I "collar 24 which extends laterally and is nesses of material may be secured.

In the drawings, which show by way of illustration one embodiment of the invention:-

Figure 1 in a view, partly in section and partly in front elevation, showing a machine having my improved presser foot mechanism applied thereto;

Fig. 2 is a view of a portion of the head of a machine with the face plate removed;

Fig. 3 is a sectional view on the line 3-3 of Fig. 2; and

Fig. 4 is a sectional view on the line 4-4 of Fig. 3.

In the drawings, I have shown a sewing machine consisting of a supporting bed 1 carrying a work support 2 and a standard 3. Said standard carries an overhanging arm 4 having a head 5 at its free end in which reciprocates the needle bar 6. The needle bar 6 is reciprocated by a lever 7 which is connected to the needle bar by a link 8. This needle lever 7 is oscillated by an eccentric strap 9 which cooperates with an eccentric on the main shaft 10. The standard 3 and the overhanging arm 4 are hollow, and the needle lever is located within the arm and standard. The operating mechanism for the needle lever is also located within invention is to provide a sewlng machlne having a supporting standard and an overhanging arm. carrying the the standard. It will be understood that there is a cover plate fitting the upper portion of the standard and the front portion of the overhanging arm, as shown in Fig. 1, so as to form an inclosed standard and arm. The needle bar carries a needle 11,'and a looper 12 cooperates with this needle beneath the work support 2 and a spreader 13 cooperates with the looper and the needle. The material is held on the work supportby a presser foot 14 which is fixed to the lower end of a presser bar 15. An auxiliary foot 16 is carried by an auxiliary bar 17 Rigidly clamped to the presser bar 15 is a bracket 18. The set-screws 19 passing through the bracket engage the bar and hold the bracket in fixed position on the bar. This bracket projects laterally and is formed with a sleeve 20 which freely engages the auxiliary bar 17. Said bracket also has a pro Jecting arm 21 on which rests a leaf spring 22. Said arm 21 has upwardly projecting ledges 23 between which the end of the leaf spring 22 extends.

The auxiliary bar 17 is provided with a forked at 25 so as to receive an upwardly projecting portion 26 formed on the bracket 18. p A spring 27 bears against the upper face of the collar 24 at its lower end and the upper end of this spring bears against the head of the machine. This spring 27 forces the bar 17 downwardly. The leaf spring 22 extends along and within the upper portion of the hollow arm 4 and at 28 said spring is curved downwardly so that the end 29 thereof seats in a supporting abutment 30 at tached to the inner face of the outer wall of the standard 3. A screw 31 is threaded through. the upper wall of the arm and standard and bears on said spring 22 adjacent the curved portion thereof so as to place said spring under tension. From the above statement, it will be apparent that the spring 22 is longer than the distance between the presser bar and the outer wall of the stand ard 3. By making the spring of this greater length, a much more even yielding action is imparted to the foot controlled by the spring.

The presser bars may be lifted by an arm 32 mounted on a shaft 33 and extending underneath the arm 21 on the bracket 18. A later 34 which may be connected to a suitable treadle is connected to the shaft .33. A downward movement at the outer end of the lever 34 raises the arm 32; this raises the bracket 18 and "both 'presser bars-'15 and 17. The presser bars may also be raised by a hand lever 35 which is pivoted at 36 to the head of-the machine (and is provided with a cam 37 which extends underneath a projecting pin 38 carried by .a "collar 7 39 secured to the presser bar 15. By swinging the hand lever in an upward direction, the cam 37 the spirit ofthe invention, as set forth in portin-g the 'other .end of said leaf and #means engaging "the spring between its ends for placingthe'same under tension.

Will raise the collar-39 and presser bar -15, and this, through the bracket 18, will raise thepre'sser'bar '17. v

-"-I-;his appl-ication :is i a division of my pending application, Serial No. 68,7 87 filed December27, r915.

--I t is'obv ions that minor changes in the de- 'ta'ils :of construction and the {arrangement of i parts nlay be made Without departing from the appended ol aims.

Havingthusdescribed the inventiomwhat is claimed as new is:-

1. The com bination of a hollow stand'ard, ho'llow overhanging arm, a presser foot, a p resser barcarrying said foot, "a leafspring, --a bearing carried by said p'resser bar on "which one end of said spring meets, a supporting abutment attached to the inner face o f the ou ter wall oi the standard and supspring,

a hollow overhanging porting the otherie'nd of the spring, means engaging the spring between its ends for placing the same under tension for causing said spnng to force the presser foot-down- 3. The combination of a hollow standard,

presser foot carried thereby, "a leaf spring located in said hollow armysaid leafsp'ring having a horizontal portion, a curved portion and averti'cal portion, a bearing carried by the "presser bar on which the'free endof said horizontal portioi'i rests, a supporting abutment carried on the inner face of the outer wall of the standard on which the free end of the vertical portion res'ts, and a screw passingthrough -the upper wall of the overhanging arm and engaging said spring adacent the curved portlonithereln for placing the same under tension.

In testimony whereof, aflix my signature,

in the presence' oftwo' witnesses.

' DUDLEY :S. *SER MOTUR. Witnesses: r

. 'S. GEORGE TATE,

'STEDMAN THOMAS.

cbpi-esfiidf thisipatent may be obtained forfive cents eah, by addressing the' Commissioner of Eatents,

'Washington, D. 0. 1 a

arm, a presser bar, a

Images