US705604A - Feeding mechanism for sewing-machines. - Google Patents

Description

N0. 7055.604'. Patented July 29,1902. y L. oNnERnoNK-s. A. vA. MERmTT.

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No. 705,604. Patented my 29, |902. A

' L. 0NDER00N`K 0 A. A. MERRITT.

FEEDING MECHANISMFOR SEWINGl MACHINES.

v Application med Nov.` 9, 1901.) l

3 Sheets--Sheet 2.

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(Appnction med Nov. 9, 190i.)

3 Sheets-Sheet .3.

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UNITED STATES PATENT OFFICE.

LANSING ONDERDONK AND ARTHUR AUGUSTUS MERRITT, OF NEW YORK, N. Y., ASSIGNORS TO THE UNION SPECIAL SEWING MACHINE COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

FEEDING IVIECHANlSM FOR SEWING-MACHINES.

SPECIFICATION forming part f Letters Patent NO. 705,604, dated July 29, 1902. v Application led November 9, 1901, Serial No. 81,759. (No model.)

To all 1071/0771/ it may concern:

Be it known that we, LANSING ONDERDONK and ARTHUR AUGUSTUS MEREITT, citizens 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 Feeding Mechanism for Sewing-Machines, of which the following is a description, reference being had to the acto companying drawings and to the letters of reference marked thereon.

This invention relates to that class of sew-` ing-machines in which there are two independently-operating presser-feet, one-having I 5 a vertical two-motion to coact with the needle and hold down the work at the needle-opening in the throat-plate and the other having a four-motion with its foot `opposed to the feed-dog to clamp the work thereon and feed zo it therewith.

The objects of our improvements are to provide means for preventing the two presserfeet from hammering on the parts beneath them when there is no work under them,to

. 5 provide a simple and effective means for operating said presser-feet. These objectswe accomplish by the mechanism shown in the accompanying drawings, in which-` Figure 1 is a rear elevation of a sewing-A 3'o machine with our improvements applied. Fig. 2 is an end elevation of the same. Fig. 3 is a similar view of the parts in a different position.

A designates the bed; B, the gooseneck; C,

the main shaft, and D the feed-dog mounted on the feed-bar E', which receives its four- Inotion movement from the cam F on the main shaft and the rocker E at the rear of the bed. The rocker-shaft E2 is provided at 4o its outer end with an arm D3, which extends forwardly to a stitch-regulating device D' on the outer end of the main shaft and from which motion isimparted to said shaft E2. A' designates the needle-arm, and A2 is the needle-bar mounted in guide-lugs on the front of the gooseneck-head B. All of these parts are substantially identical with what is shown in Patent No. 299,568, granted to Muther and Dearborn .I une 3, 1884, except that the 5o rocker-arm E is mounted rigidly on the rockshaft E2, extending along the rim of the bed, and the arm D3 is affixed to said shaft instead of directly, to the rocker-arm.

The rock-shaft E2 is provided at its inner end` with a crank-arm e3, connected by an upwardly-extending connecting-rod E4 with an outwardly-projecting crank-arm g at the inner or right-hand end of an upper rock shaft or bar G. The rock shaft or bar G is provided with depending bearings g g', turning on another rock-shaft H, mounted in bearings at the rear side of the gooseneck and actuated from the main shaft C by means of aconnecting-rod C2, extending from an eccentric thereon up to an adjustable block c2, mounted in a slot in a crank-arm H', projecting rearwardly from the inner end of the rock-shaft H. d

L designates a,l vertically reciprocating shaft or bar mounted in bearings a2 a2 on the outer side of the head B and forced down by a strong spring K, the free end of which bears upon an adjustable pin Z on said vertical shaft. d i

M designates an inverted-T-shape rocking lever pivoted at the juncture of its three arms on a stud Z', projecting from the verti- `calshaft L.. The upwardly-projecting arm m of this rocking lever is connected by a link hgwith a crank-arm h3 on the outer or left- 8o hand end of the rock-shaft H, so that the lever M will be rocked from said shaft.

I is the needle presser-bar, mounted in bearings a3 a3 on head B', directly in rea-r of the shaft or bar L, and provided with an adjustable pin t', having a block 2 turning on it and engaged by a forkor slot in the rear end of the arm 'm' of rocking lever M. A guide-arm Z3 extendsfrom the vertical shaft or rod L and is forked to embrace and slide on the upper flattened end of the presser-bar I'. This presser-foot I servesto hold the work down and to strip it lfrom the needle.

J' is the feeding presser-bar, pivoted between its ends to the forward arm m2 of the lever M and having a feeding presser-foot .T on its lower end directly opposed to the feeddog D and cooperating therewith to clamp the work and feed it positively. The upward movement of the presser-foot bars I J' is imroo parted to them alternately by this rocking lever M, and one presser-foot serves as the bearing-point or fulcrum for the other While being so raised.

The horizontal or feeding throw is imparted to the feeding presser-foot bar J by means of a link j, which extends rearwardly to a crank G5 on the outer or left-hand end of the rocker shaft or bar G.

In order that the downward movement of the lever M may be limited to prevent the presser-feet I J from coming in contact with the throat-plate and feed-dog, respectively, we secure to the head B' a transverse stop M', having a horizontal upper edge, on which the lower horizontal edge of lever M rests when no work is under the presser-feet, but which is held ont of contact with said stop M when the work is in place.

N is a lifting-cam pivoted to the head under a pin or projection Z4 on the upper end of the vertical shaft or bar L and by means of which both of the presser-foot bars may be lifted simultaneously from the work through the medium of said lever M, and the force of the spring K is exerted on both these presserfoot bars through the Imedium of this same lever M.

The presser-foot J is recessed to receive the smaller needle presser-foot I.

To prevent noise or pounding, the bearingsurface of one of the pieces M or M must be slightly convex.

Having thus described our invention, what we claim, and desire to secure by Letters Patent, is-Y 1. In a sewing-machine, the combination with the two independently-operating presserfoot bars, means for imparting vertical move- -ment to the bars alternately in opposite directions and means for oscillating one of the bars, of a stop device to limit the downward movement of both presser-bars to prevent the presser-feet from contacting with the parts of the machine beneath them; substantially as described.

2. The combination in a sewing-machine with the four-motion feed, of a vertically-reciprocating spring-depressed shaft or rod on the machine-head, a vertically-rocking lever pivoted to the said vertically-reciprocating shaft and operatively connected above the pivot to the main shaft of the machine, a vertically-reciprocating needle presser-bar pivotally connected to said vertically-rocking lever in rear of its axis for operation thereby and provided wit-h a presser-foot to hold the Work down on the throat-plate and strip the needle, a feeding presser-bar pivoted to said vertically-rocking lever in front of the axis thereof for vertical reciprocation thereby toward and from the feed-dog, and operative connections between the feeding presser-foot bar and the feed mechanism; substantially as described.

3. The combination in a sewing-machine with the four-motion feed, of a vertically-revom@ ciprocating spring-depressed shaft or rod on the machine-head, a vertically-rocking lever pivoted to the said vertically-reciprocating shaft and operatively connected above the pivot to the main shaft of the machine, a vertically-reciprocating needle presser-bar pivotally connected to said vertically-rocking lever in rear of its axis for operation thereby and provided with a presser-foot to hold the work down on the throat-plate and strip the needle, a four-motion feeding presser-bar pivoted between its ends to said verticallyrocking lever in front of the axis thereof for vertical reciprocation thereby toward and from the feed-dog, and operative connections between the upper end of the feeding presserfoot bar and the feed mechanism; substan-4 tially as described.

4. In a sewing-machine, the combination with the four-motion feed, of a vertically-reciprocating spring depressed shaft or bar mounted on the machine-head, a rocking lever pivoted to said shaft or bar and actuated above its axis from the main shaft, a vertically-reciprocating needle presser-foot bar pivotally connected to said rocking lever in rear of the axis thereof and provided with a presser-foot to hold the work down on the throat-plate and strip the needle, a four-motion feeding presser-foot bar pivoted between its ends to the said rocking lever in front of the axis thereof for vertical movement thereby, and provided at its lower end with a presser-foot opposed to the upper face of the feed-dog to clamp and feed the work, operative connections between the rocking level' above its axis, and the feed-dog operating mechanism, and a horizontal stop secured to the head under the lower horizontal edge of said rocking lever to limit the downward movement of said lever and the presser-foot bars pivoted thereto; substantially as described. e

5. In a sewing-machine, the combination with the four-motion feed including a rockshaft actuated from the main shaft, and two upper rock-shafts along the rear of the gooseneck; one of said shafts being rocked from the feed rocker-shaft and the other from the main shaft, of a vertically reciprocating spring-depressed shaft or bar on the machinehead, a vertically-rocking lever pivoted to said shaft and linked above the axis to the outer cranked end of that rock-shaft which is actuated from the main shaft, a verticallyreciprocating needle presser-foot bar pivotally connected to the vertically-rocking lever in rear of the axis thereof and provided with a presser-foot to hold the work down on the throat-plate and strip the needle,- a four-motion feeding presser-foot bar pivoted between its ends to the rocking lever in front of the axis thereof and provided with a presser-foot opposed to the upper face of the feed-dog to clamp the work thereon and feed it positively,- a link connecting the upper end of the feeding presser-foot bar with the cranked outer end IOO IIO

IIS

of the other of said two upper roekshafts for In testimony whereof we .ttiix` our signaoscillation from the feed-dog rock-shaft, and tures in presence of two witnesses. a. lifting-cam adapt-ed to engage a projection LANSING ONDERDONK.

on said vertically-reciprocating shaft and si- ARTHUR `AUGUSTUS MERRITT. 5 multaneously raisethe rocking lever and the Witnesses:

two presser-bars connected therewith; sub- W. H. BOYER,

stantially as described. W. E. WEAVER.

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