US417333A

US417333A - Stop-motion for sewing and looping machines

Info

Publication number: US417333A
Authority: US
Publication date: 1889-12-17
Anticipated expiration: 1906-12-17

Description

(N0 Mdel.) W. an H. PAULMANN.

STOP MOTION POR SEWING AND LOOPING MACHINES.

Patented Deo. 17, 1889.

UNITED STATES PATENT GEEICE.

VILLTAM PAULB'IANN AND HENRY PAULHANN, OF GLASTONBRY,

CONNECTICUT.

STOP-MOTION FOR SEWING AND LOOPING MACHINES.

SPECIFICATION forming part of Letters Patent No."417,333, dated December 17, 1889.

Application filed October 3, 1888. Serial No. 287,069. (No model.)

To all whom it may concern: u

Be it known that we, WILLIAM PAULnAN-N and HENRY PAULMANN, citizens of the United States, and residents of Glastonbury, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Stop-Motions for Sewing and Looping Machines, of which the following is a full, clear, and exact description, whereby any one skilled in the art can'make and use the same.

Our invention consists in the combination of the frame, the movable head, the beltshifter rod, and a stop-motion device. It further consists in the combination, in a machine of this class, ot the movable head bearing a trip device, a stop-rod with a projection in the path of movement ot the trip, and a tilting lever that is connected to the stopfrod and to the shifter-bar; and it fiirther consists in the details of the several parts of the device making up our improvement, and in their combination, as more particularly hereinafter described, and pointed outin the claims. y

Referring to the drawings, 'Figure l is a view in rear elevation of a sewing-machine with our improvement attached. Fig. 2 is a detail View, in rear elevation, on an. enlarged scale, illustrating` the operation ofour device. Fig. 3 is a detail side viewof the trip-fingerborne on the sewing-machine head. Fig. et is a detail top view of the adjustable trip-tingen In the accompanying drawings, the letter a denotes the bed of aseaming-machine such as is shown and described in United States patent to E. E. Kilbourn, dated November 20, 1866, No. 59,746, this machine having a movable head l), carrying the thread and part of the sewing and looping mechanism, the said head being driven by means ot the threaded shaft c, that extends from end to end across the bed, and is driven, as by means of a belt (il, passing around the pulley d. In the-ordinary method of using this machine the movement of the head l), that is driven by the screw-shaft c, is stopped by means of a shipper-rod e, that extends along the machine above the shaft in a position where it may be conveniently reached by the operator from any point along the length of the machine.

This shi pper-rod is supported in bearings ff, and has at one end a shoulder g, that abuts against the bearing f when thebelt is running on the fast. pulley. The machine is stopped by lifting up on the shipper-rod, when the spring 7L at once moves it lengthwise and throws the belt cl upon the loose pulley and stops the machine.

Owing to inattention or carelessness or the effort to attend to too many machines at once, an operator may allow the sewing-machine head to travel too far along the screwshaft before stopping it, and this results in the breaking of the needles or such bending of the same as causes poor work to be done on the succeeding scam that is attempted to be sewed by the machine. In order to obviate these` difliculties, we have combined therewith an automatic trip device t', and this consists ot a lever k, pivoted to ablock l, tast to the frame or any fixed part of the machine, the upper arm 7o of the lever underlying the under side of the shipper-rod e and resting in contact therewith. i The longer arm k2 of the lever is connected toi the stop-rod m, as by passing through a slot in the end of the stoprod that is supported on uprights n, fast to the frame of the machine. To this reciprocating stop-rod lm, there is secured one or 'more studs o, adj ustably secured thereto, as by means of a screw-clamp o', and these studs project into the line of movement ot' the adjustable trip-finger p, that is borne 4on the traveling head l) ofthe sewing-machine. This trip-finger is secured in such position to the head that when it is set as illustrated in dot ted outline in Fig. 2 ot' .the drawings it will in the forward movement of the sewing-machine head come in contact with the stud o and slide the stop-rod along, which sliding movement tilts the lever 7.1, and thus lifts the shipper-rod, so that t-he shoulder is raised above the stop on the bearing f and the spring h at once throws the shipper-rod over and shifts the belt to stop the machine. This trip-finger is made vertically adjust-able by means ofthe cam-latch 0', that, .in the form of improvement shown, is slotted at the end for the passage of the finger that is held downward by means of the spring p. When the cam-latch is set as shown in Fig. 3, the trip- IOO finger will not operate to move the stop-rodgl l. In combination with the movable head but by moving` the Cain-latch. forward the lbearing` the trip-finger, the sliding,` shipper- 'Iinger is projected downward a distance su f- Iicient to cause its lower end to engage the stud in the movement of the head.

IVe do notliinit ourselves to the particular construction or arrangement of-the trip-lever or of the trip device, and it is obvious that one or more of the adjustable studs may be used, as may be desired.

In the operation of our device, as soon as the machine-head has been returned to the end of the maehine to start upon a seam the resetting of the shoulder of the shipper-rod in engagement with the bearing tilts the stop-lcver and sets the stop device in proper position to operate as soon as the machine again is at work, and this sliding oi the shipper-rod throws the belt from the loose 1o Ithe fast pulley and starts the 1nachine.

IVe claim as our inventionrod, the tilting trip-lever with one arm in contact with the shipper-rod and the other arm inv contaet with the sliding stop-rod, and the projecting stud on the stop-rod located in the path of Vmovement of the trip-finger, all substantially as described.

2. In combination with the movable head of the sewing-machine, the sliding shipperrod, the vertiealy-adjustable trip-nger secured to said head, the tilting` lever with one arm in engagement with the shipper-rod and the other in engagement with the sliding` stop-rod, and the sliding stop-rod bearing the adjustable stud, all substantially as described.

L WILLIAM PAULMANN.

HENRY PAULMANN. Witnesses:

COOPER S. RoBEsoN, CHAs. N. LooMEs.