US364769A

US364769A - Sewing-machine

Info

Publication number: US364769A
Authority: US
Publication date: 1887-06-14
Anticipated expiration: 1904-06-14

Description

(No Model.) 2 sheets-sheep 1.

W. H. PALMER, Jr. SEWING MACHINE.

vuins. Pnmmumgnpher. wnhmgmn. u. c.

(No Model.) 2 Sheets-Sheet 2.

`Wy. E. PALMER,v Jr.

, SEWING MACHINE. No. 364,769. Patented June 14,1887` UNITED YSTATES PATENT OFFICE.

WILLIAM H. PALMER, JR., OF MIDDLETOWN, ASSIGNOR rIO PALMER BROTHERS, OF NEV LONDON, CONNECTICUT.

SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 364,769, dated June 14, 1887.

Application led April l2, 1894.

To @ZZ whom it may concern..-

Be it known that I, .WILLIAM H. PALMER,

.Ir., ofMiddletown, in the county of Middlesex The principal objects of my invention arelo prevent the head of the machine from being turned until the needle-bar has been raised sufficiently far to insure the needle being entirely freed from the cloth before the head is turned, to lock the head in its inoperative or turned position as well as in its operative or LPO normal position, to lock the needle-operative Vshown in Figs. l to 4, inclusive, in which form shaft before the head of the machine can be turned, and to hold said shaft securely locked during the whole time the head is in an inoperative position, and until it is 'brought back to its normal or operative position and there locked.

The invention is applicable to machines in which the pivot or journal on which the head is supported is concentric with the needleoperating shaft and to other machines in which the pivot or journal'on which the head is supported is eccentric to said needle-operating shaft.

The invention consists in novel combinations of parts hereinafter described, and pointed out in the claims.

In the accompanying drawings, Figure l is a sectional view of a portion of the arm of .a sewing-machine and a head capable of being turned on a centerconcentric with the needleoperating shaft, the head being locked to the arm and the shaft being turned into the proper position for locking it. Fig. 2 is a similar section showing Athe needle-operating shaft as serial No. 127,653. (No modem locked and the head locked in its turned or inoperative position. Fig. 3 is a section upon the dotted line x Fig. 1,'showing the parts in the same position as in Fig. l. Fig. 4 is a view similar to Fig. 3, showing the parts in the same position as in Fig. 2. Fig. 5 is a front view of the head of a machine in which the pivot or'journal ofthe head is eccentric to the needle-operating shaft, showing the head locked in an operative position and the shaft turned to a position in which it may be locked. Fig. 6 is a side view of the end portion of the machine-arm and the head, showing the parts in the same position as in Fig. 5. Fig. 7 is a View similar to Fig. 5, showing the head in a turned or inoperative position. Fig. 8 is a sectional view ou the dotted line y y, Fig. 6, showing the parts in the position thereshown; and Fig. 9 is a View similar to Fig. 8but showing the parts in the same position as Fig. 7. p

Similar letters of reference designate correspondig parts in all the figures. v

I will first describe the form of my invention thejournal ou which the head turns is con centric with the needle-operating shaft.

A designatesthe outer end portionof the arm of a sewing-machine, and B designates the head of the machine, which may be of anysuitable construction, and which is provided with a cylindric hub or journal, B', whereby it is so secured tothe arm that it may be turned one-fourth of a rotation, more or less, from its operative position, (shown in Fig. 1,) and ina plane transverse to thelength of the arm. In this instance the end of the arm A is bored out to form a cylindric socket orbearing, a, in which the journal B is fitted, and wherein it is secured against outward movement by a Vpin or screw, b, the point of which engages with an annular groove, b', in the j ournal B', or by any other suit-able means.

C designates thel needleoperating shaft, which is concentric with thejournal B', and which has or may have a` bearing, c, in said journal.

1Upon the endof the shaft C is a disk, C', in

which is a crank-pin, d, and upon the needlebar D, which is vertically movable in the head B, is a slideway, d, in which said crank-pin worksto reciprocate the needle-bar D. In the head B will also be arranged a presser-bar; but this I have not shown, as it forms no part of my invention.

Behind the disk or crank C is a circular flange or surface, c', in which is a notch, c', of' considerable depth, for a purpose hereinafter described,and upon the head B is an upwardlyprojecting portion, i, which extends rearward over or above an upwardly-projecting portion, A', on the arm, the lower surface of the rearwardly-projecting portion BZ and the upper surface ofthe portion A being arcshaped and concentric with the shaft C. Inasniuch as the flange or collar C e is formed integral with or secured fast to the shaft C, it may be considered a part of the shaft.

Vhen the head B is in position for operation, the head and arm are connected by a `'locking bolt or device, and I have shown a locking-bolt, f, arranged in the upwardly-projecting portion A' of the arm, engaging with the head, and which may be pressed down by a finger-piece or unlocking-lever, E, pivoted at y in the part B201 thehead B. On the bolt fis a forwardly-projecting toe,f, which extends through an arc-shaped slot, f2, in the head B and over the fiange or surface c on the shaft C. The bolt f is here shown as inipelled upward by a spring, g, which is arranged in a recess or depression, g2, in the arm A, and one arm of which enters a hole or slot in the bolt. This spring is retained by a screw, g, around which it is coiled; but a spring of any other suitable kind may be employed.

At one end of the arc-shaped slotf in the head B is a notch or recess, f, and at the opposite end thereof is, or may be, asmaller or shallower notch or recess, f4. Normally, and while the machine is in operation, the toe f of the bolt fis held deeply in engagement with the notch f, and hence locks the head B securely to the arm; and in order to maintain the head accurately in position and prevent any play thereof while the machine is in operation, I prefer to make the bolt f with a slightly-conical upper end, fitting a correspondingly conical socket, di, in thepart B2 of the head which overhangs the bolt. When the head is locked by the toef entering the notch f3, the head is properly centered and steadily held by reason of the spring impelling the bolt upward and holding it in the conical socket di. The crank-pin d is so arranged relatively to the notch c in the fiange c that when the crank has brought the needle-bar D into its cxtreme upward position, as shown in Fig. l, the notch c will be immediately below the teef of the boltf, as is shown in Figs. l and 2, and when the head is to beturned the needle-bar D is so brought to its highest position, and the fingerpiece or unlocking-lever E is then grasped by the finger and pulled in the direction of the arrow, Fig. 3. The first pull on said lever pushes down the boltf sufficiently far to carry its ripper end out of the socket and to carry its tocf out of the notchf3 and into the notch c', and a further turn upon the said lever serves to swing or turn the head on the journal B until it is brought to or near an approximately horizontal position and until the notch f is opposite the tocf, whereupon the toe springs outward into said notch, and so holds the head with sufficient force in an inoperative position. The notch j* is not deep enough to permit the disengagement of the toe f from the notch e, and therefore the needle-operating shaft always remains locked so long as the head is turned out of an operative position. The notch f* does not present abrupt shoulders to the toef, and therefore when it is desired to return the head to an operative position a slight force will move the toef inward, and

the head can then be turned back until the notchf3 is opposite the toe, whereupon the spring f/ will shove up the boltf, moving the toe out of the notch c and into the notch f, and thereby unlocking the needle-operating shaft and locking the head against turning. If the notch c were made wider, the needlebar would not necessarily be raised to its extreme upward position before the head could be unlocked; but in all cases it mustbe moved far enough to take the needle out of the cloth. then the pivot of the head is concentric with the needle-operating shaft, the head might be arranged to turn in either direction. In the machine shown in Figs. 5 to 9, inclusive, the head is pivoted eceentrically to the needleoperating shaft.

A designates the outer end portion of the arm, and B designates the head, which is pivoted or jonrnaled on the bolt l1, so that itniay be swung in a vertical plane transverse to the length ot' the arm A.

C designates the needleoperating shaft, which is external tothe arm, orto that part of the arm to which the head is pivoted,and which is mounted in a bearing, z', as best shown in Fig. 6. The head B in this example of the invention has bearingsjf, wherein a needlebar, D, -is arranged to reciprocate, the needlebar being operated by a link, 7.1, and an arm, la', on the shaft C, an oscillating or reciprocating rotary motion being imparted to said shaft by any suitable mechanism,whieh forms no part of my invention and is not here shown. The head B is also designed to carry asuitable presser-bar; but this is not shown, as itforins no part of my present invention. rlhe arm A has at its end an upwardly-projecting portion, A', the upper arc-shaped surface ot' which is concentric with the pivot or journal h, on which the head turns, and the head is likewise provided with an upwardly and rearwardly projecting portion, B2, which extends across the portion A, and the under surface of which is also arc-shaped. 'The head :is locked by a boltorloeking device, which con- IOD nects the part B2 and arm portion A. I have here shown a locking-bolt, f, capable of sliding in the part A, and having below it or otherwise applied to it a spring, g', of spiral or other form, whereby it will be impelled upward when permitted. The outer or upper end of the bolt f is conicalV and fitted to a conical socket, ff, in the portion B2 of the head. The bolt therefore serves to hold the head steady and accurately against movement.

E designates the unlocking-lever or lingerpiece, which serves the double purpose of depressing the boltj' and as a handle for turning th'e head on its pivot orjournal h. This ringer-piece or lever is pivoted at g, and has an arm which acts to depress the bolt when the lever is pulled.

In connection with the bolt f, I employ a device forlockingthe needle-operating shaft C, and this device is best shown in Figs. 7, 8, and 9. As here shown, it consists ofa small bell-crank lever fulcrumed at Z to the end of the arm A, and having one arm, Z, connected with the boltf, so that a depression of the bolt will swing the lever, and its other arm,Z2,pro vided with a locking tooth or projection, Zil, which is adjacent to the hub of the arm lc.

In the hub of the armV k is a notch, im,

y and in the hub of the head B, through which the pivot h passes, are two notches-a deep notch, m, and a shallow notch, m. Vhen the head B is in an operative position, as

shown in Figs. 5, 6, and 7, the notch m in the hub of the head Bis opposite the tooth Zilf, and by the resilience of the spring g' the bellcrank locking-lever is actuated to impel and hold the tooth Z* in the notch m, as shown in Fig. 8. Before the head can be turned, the shaft must be turned to move the needle-bar D to or nearly to its highest position, at which time the notch 7a* is opposite the tooth Zil. The lever E is now taken hold of and pulled. The first pull serves to depress the bolt f, and, by carrying the tooth Z* of the locking-lever into the notch k* and out of Vthe notch m, locks the shaft C against turning and unlocks the head B. By afurther.

pull upon the lever the head will be turned on t-he pivot h, and as soon as the notch m comes opposite the tooth Z;k the latter will spring slightly over and into said notch m, .at the same time continuing in the notch cil. lo return the head, it is pushed back, and as soon as the notch m reaches the toot-h Zi the latter,

by the resilience of the spring g', is thrown into the notch m and out of the notch kif,

thereby first locking the head and then un-- shaft when the head is to be turned and for locking said shaft before the head is unlocked,

and retaining it locked until the head is locked securely. In both examples the samelever or a plane transverse to the length of said arm,

and a locking device adapted to engage with a notch in said shaft to lock it against turning, the notch in the shaft being so placed as to receive said locking device only when the shaft has been turned to bring the needle out of the work, substantially as herein described.

2. The combination, with the arm of a sewing-machine and a head pivoted to turn in a plane transverse to the length of the arm, one

of said parts being provided with a locking-bolt and the other witha notch to receive said bolt, whereby the head is held against turning, of a needle operating shaft provided with a notched collar or iiange, whereby the movement of the bolt to unlocksaid head is prevented until the shaft has been turned to bring the needle out of the work, substantially as herein described.

3. The combination, with the arm of a sewing-machine, of a head pivoted to turn in a plane transverse to the length of said arm, a locking-bolt serving to hold said head against turning, and an unlocking-lever and fingerpiece carried by the head, and serving by its first operation to unlock the head, and by fur- IOO ther operation to turn the head, substantiallyA as herein described. y

4. The combination, with a sewing-machine arm. and a head pivoted to turn in a plane transverse to the length thereof, one of said parts being provided with a locking device and the other being notched to receive the locking device, of a needleoperating shaft provided with a notched flange or collar, whereby the movement of the bolt to unlock said head is prevented until the said shaft has been turned to bring the needle out of the work, and a lever and finger-piece carried by the head, and serving by its first operation to move the bolt to lock the shaft and unlock the head, and by its further operation to turn the head, substantially as herein described.

5. The combination, with a sewing-machine arm and its needle-operating shaft, of a head pivoted concentrically with said shaft and capable of turning in a plane transverse to the length of said arm, a locking-bolt serving to' hold said head against turning, and an unlocking-lever and finger-piece carried by the head,

IKO

IZO

and serving by first operation to unlock the bhe are-shaped slotfnnd notehfi, tliespringvided with the notched flange c e', the springnetunt'ed boltff, and the unlocking-lever E, actuated bolt and toe ff, m1 d the lever and r3 substantially as herein described. finger-piece E, all substantially as herein de- 7. The combination, with the nrxn A A', scribed.

provided with the eylindrie bearingT a, of the TVM. H. PALlllER, JR..

head B, provided with the journal B', the slot VitneSses:

and notch fi" f, mid the portion B2, the Shall; CHARLES L. LINGOLN,

@having .f1` bearing in Said journal :1nd prol GEORGE S. LINCOLN.