US2646760A - Loop-taker mounting means for sewing machines - Google Patents

Description

July 28, 1953 E. M. HANF 2,646,766

LOOP-TAKER MOUNTING MEANS FOR SEWING MACHINES Filed Jan. 2. 1951 Patented July 28, 1953 LOOP-TAKER MOUNTING MEANS FOR SEWING MACHINES Edward M. Hanf, Bridgeport, Conn., assignor to The Singer Manufacturing Company, Elizabeth, N. J a corporation of New Jersey Application January 2, 1951, Serial No. 204,046

6 Claims. (Cl. 112-196) This invention relates to sewing machines and more particularly to a loop-taker housing and means for removably securing the housing to a sewing machine frame.

The present invention is particularly adapted for use with a two-thread lock-stitch sewing machine of the type employing either a rotary or an oscillating shuttle which is journaled within a housing which is adapted to be detachably mounted upon the sewing machine frame.

It is a primary object of this invention to provide a loop-taker housing unit which may be readily and inexpensively attached to a sewing machine and which may with facility be replaced in the field by a new similar housing unit in the event that the original unit becomes damaged by accident or wear.

To the attainment of the ends in view, the invention comprises the devices, combinations and arrangements of parts hereinafter described and more particularly pointed out in the claims.

The features of the invention and the advantages attained thereby will be readily understood by those skilled in the art from the following detailed description of a preferred embodiment of the invention illustrated in the accompanying drawings in which:

Fig. 1 represents a front face view of a looptaker housing in which the present invention is incorporated, and as embodied in a sewing 'machine shown partly in section.

Fig. 2 represents a perspective view, partly in section, of the sewing machine bed casting which carries the loop-taker housing.

Fig. 3 represents a perspective view of the inner face portion of the loop-taker housing with an oscillatory shuttle element mounted within such housing.

Fig. 4 represents a fragmentary sectional view taken substantially along the line 44 of Fig. 1.

Fig. 5 represents a sectional view taken substantially along the line 5-5 of Fig. 4.

Fig. 6 represents a perspective view of one of a pair of dowel pins employed in the present looptaker housing.

The sewing machine bed casting I is formed with a central supporting leg I I, of which the sides are widened at I2, I2 and faced to form ar-cuate or segmental seats I3, I3 to which is secured by screws I 4, I4 a loop-taker housing of a type which is broadly disclosed in the E. B. Allen Patent No. 1,869,402, August 2, 1932;

Broadly, the present loop-taker housing comprises a pair of arcuate members I and I6 which are secured together by means of a pair of screws I1, I! passing through aligned apertures in the members I5 and I6. The exposed surface I8 of to the sewing machine frame ID, the surface I8 is disposed in abutting relation with the complemental surfaces I3, I3. These surfaces I3, I3 and [8 are normally ground so as accurately to position the loop-taker housing in proper alignment with the cooperating actuating elements of the sewing machine. I

The inner cylindrical surface of the housing member I 6 is cylinder ground, as at I9, to form a supporting hearing or raceway for the circular bearing rib of the usual oscillatory shuttle 2| having a loop-seizing beak 22, a throat 23 and a heel 24, which throat and heel portions are engaged by the arms 25 and 26 of the usual oscillatory shuttle driver 21 carried by the shuttledriving shaft 28 journaled at one end in the leg II. Whenever the loop-taker housing with its shuttle 2| is mounted in its operative position, as illustrated in Fig. 1, the shuttle driver 2] functions to actuate the shuttle 2| in the usual manner, and since this shuttle-driving mechanism is old and does not come within the purview of the present invention, no further detailed description thereof will be presented herein.

As pointed out hereinabove, the present looptaker housing is adapted to be secured to the sewing machine frame by means of a pair of screws I4, I4. The shank portion of each of these screws is adapted to be loosely located within a respective one of the aligned apertures 29 formed within the housing elements I6 and I5, while the threaded end portion of each screw is threadedly received within a respective one of a pair of apertures3fl provided in the surfaces I3, I3 of the frame member. This construction permits the loop-taker housing to be readily applied to and removed from a sewing machine frame but, of course, means must be provided for accurately locating the loop-taker housing relative to the shuttle driver 21, as well as to the reciprocatory needle 3 I. To this end, the present invention contemplates the provision of a pair of dowel pins, of which each is designated by the numeral 32. Each of these dowel pins includes a cylindrical shank portion 33 as well as an enlarged head porelement I6, while the enlarged head portion 34' of the dowel pin is loosely received within a chamso as to impinge upon a respective one of the.

head portions 34 of the dowel pinstherebyto lock the dowel pin in a selective position of lateral adjustment.

In utilizing the present invention; the machine 4 frame It is first provided with-a p'air-of dowelpin receiving holes 38, 38, of which-each is disposed within a flat surface Band is dimensioned so as snugly to receive the shank portion 33of one of the dowel pins. housing, with its set screws 37, 3'5 loosely positionedr-therein; is mounted in its customary locationi with the surface l8abutting the surfaces [3, I3-.= The housing is then adjusted so as to-cooperate: properly with the shuttle 2t and the needle-:31: Thereafter, the fastening screws M, l4 are-tightened Withthe'frame holes disc as to lock the housing in a fixed position; With the housmgsin this position, and with the dowel pins received'within the holes 38; 38- of the sewing machine frameptheset screws 3?, 3'! are tightened against each of the dowel pins so asto fix them; in a given position within. the housing proper: Thereafter; if itbecomes necessary to remove the-housing, it may with accuracy be replacedupjon its-seats l 3; ion the. machine frame due to thefact'that'the :dowel pins. will function to relocatethehousing in its initial position.

Furthermore; it will be appreciated that in the event that the original loop-taker housing be comes-idamagedeither by,'accident' or through weanla-nd-ithasto:be replaced "in the field by a newr-housing, the present invention permits the oldhousingtobea' replaced with facility due to the: fact that a new housing with its laterally adjustabledowel'pinscmay be readily applied tothe v sewing machine irrespective of the fact that the new housing was not manufactured solely for placement uponsaid sewing machine. Thus, those skilleddn the art will understand that the present loop-taker housing may be initially applied toa sewing machine with greatfacility and at a-low' cost. and, furthermore, that it is also adapted to be. applied'as a replacem nt unit to a sewing machine-in'the field in the event that the original housing has become damaged. Also, itiisi to :be understood that the present constructiorrtwhich includes the laterally adjustable dowel pins and their associated set screws aremost effi taken support for locking. :said dowel pin :in' .a .se-- lective' positionpofv lateral. adjustment within its.

associated: apertures.

Thereafter, the loop-taker I 2. A loop-taker housing for removable attachment to a sewing machine having a pair of dowelpin receiving apertures, comprising, an annular loop-taker support having a pair of circumferentially spaced apertures therein, a pair of dowel pins each located within a. respective one of said apertures and having its-shank'diameter substantially less than the maximum width of its associated aperture so as to be laterally adjustable therewithin, each of said dowel pins being longer than its associated aperture so as to project outwardlyifromsaidloop-taker support, and means carried" by said loop-taker support for locking each of said fdowel pins in a selective position of lateral? adjustment. within its associated looptaker support aperture.

3. A loop-taker housing for removable attachment to a sewing machine having a dowel-pin receiving aperture, comprising, a loop-taker support having an aperture therein, a dowel pin formed-with a cylindrical shank and an enlarged head portion, saiddowel.pin having its-shank located within said loop-taker support aperture and having its shank diameter. substantially-less than .the max mum width of-said aperture .so as to be laterally-adjustable therewithin and having its shank formed longerthan its associated aperture so as to project outwardly from said looptaker. support, and meansincluding a-set screw threadedwithin said loop-taker support for engagement with the head of saiddowel pin thereby to lock saiddowel.pin-inlaselective position of lateral adjustment-within its associated aperture.

4. A loop-taker housingfor removable attachment to a sewing machine having a. pair of dowelpin receiving. apertures, comprising, a loop-taker support including two annular memberssecured together along a pair of abutting flat surfaces, one of said members being formed with a pairof oircumferentiallyspaced apertures each leading from said abuttingufiat surfaces to the outside of saidsupport, a pair of dowel pinseach located within a respective one of said support apertures and having. its shank diameter substantially less than the maximum .width of its associated aperture so as to be laterally adjustable therewithin, each of said dowel pins-being longer than its associated aperture so as to project outwardly from said support, and means carriedhy the other supportedmember for locking each of said dowel pins in a selective positionoflateraladjustment within its associated support aperture.

5. A loop-taker housing forreniovable attachment to a sewing machine having a pairof dowelpin receiving apertures, comprising, a loop-taker support including two annular. members secured togetheralonga pairof abutting flat surfaces, one of said members being formed-wither. pair of circumferentially, spaced apertures leading to the outside of said support and a pair ofcounterbores each .leadingfrom a-respective one ofnsaid support apertures to the abutting flat surfaces, a pair of @dowellpinseach formed with a cylindrical shankand an enlarged head-portion and each being disposed with its shank and head portions positioned respectively within one ofsaid support apertures andone of said counterbores with the diameter of saidv shank and the-diameter of said heacteachbeing, substantially less than the maximum Widthofits associated aperture or. counterbores so-as to be laterally adjustable therewithin, each of said dowel pins havingits shank formed longer. than-its associated support aperture so asto projectoutwardly;from said support, and apair. of set screws: each .-threaded within the other of said support members for engagement with the head of a respective one of said dowel pins thereby to lock said dowel pin in a selective position of lateral adjustment within its associated aperture.

6. A sewing machine comprising, in combination, a frame having a flat surface formed with a pair of spaced apertures therein, a loop-taker support having a fiat surface complemental to said frame surface for removable attachment in abutting relation therewith, said support surface being formed with a pair of spaced apertures complemental to said first mentioned apertures with respect to location but different with respect to their lateral dimensions, a pair of dowel pins each located within a respective one of the larger pair of said apertures with the shank diameter of each pin being substantially less than the maximum width of its associated larger aperture so as to be laterally adjustable therewithin, each of said dowel pins being longer than its associated larger aperture and having its shank diameter substantially equal to the width of a respective one of said smaller apertures so as to fit snugls therewithin, and means associated with said looptaker support for locking each of said dowel pins in a selective position of lateral adjustment within its associated larger aperture.

EDWARD M. HANF.

Name Date Allen Aug. 2, 1932 Number

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