US958800A - Adjustable sewing-machine table. - Google Patents

Description

V. GIBBINS. ADJUSTABLE SEWING MACHINE TABLE.

APPLICATION FILED APB.. l5, 1909.

Patented May 24, 19M).

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V. GBBINS.

ADJUSTABLE SEWING MACHINE TABLE. APPLICATION FILED APR.1 6, 1909.

958,8O@ l .Patented May 2% 1919.

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V. GIBBINS. ADJUSTABLE SEWING MACHINE TABLE.

APZPLIOATION FILED ARR. 16, 1909.

Patented May 24;, 1916.

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VIRGINIA GrIBBINS, 0F FRUI'IVALE, CALIFORNIA.

ADJUSTABLE SEVING-MACI-IINE TABLE.

To all 'whom t may concern:

Be it known that I, VIRGINIA Gnsins, a citizen of the United States, residing at Fruitvale, in the county of Alameda and State of California, have invented a new and useful Adjustable Sewing-Machine Table; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to sewing machine tables, and embraces the construction of an adjustable table having improved operating means.

- One of the objects of the invention is the construction of a sewing machine table capable of being readily adjusted to various heights and having connections with a lever operating mechanism whereby the adjustment may be quickly effected.

Another obj ect of the invention is the construction of a sewing machine table having telescopic legs and lever means for controllin the adjustment of the legs.

still further object of the invention is the construction of an improved adjustable sewing machine table and an improved adjustable treadle operated pitman whereby the machine may be quickly adjusted to different heights for various persons.

With the above and other objects in View, the invention embraces certain constructions, combinations and arrangement of parts clearly described in the following specification and illustrated in the accompanying drawings, in which,

Figure 1 is a front elevation of a table showing the legs extended. Fig. 2 is an end elevation thereof. Fig. 3 is a front elevation showing the table legs telescoped. Fig. 4 is a longitudinal sectional view of a table leg. Fig. 5 is a detail view of a lower table leg member. Fig. 6 is a detail bottom plan view of a lever operating mechanism, and Fig. 7 is a detail sectional view of a clutch. Fig. 8 is a perspective view of the lever operating mechanism. Fig. 9 is a detail sectional view through the members 11 and 14, clearly showing the parts 18, 19 and 21.

Referring to the accompanying drawings which are prepared for illustrative purposes and accordingly not drawn to scale, 1

Specification of Letters Patent.

Application filed April 167 1909.

Patented May 24, 1910.

Serial No. 490,397.

denotes a table top which may be formed in the conventional manner and provided with a machine of the usual pattern. On the under side of the table top, upper leg sections 2 are secured by means of screws 3 and said leg sections are formed hollow and braced by rear bars 4 and 5 and horizontal side bars 6. On the right side bar 6, a shaft 7 is journaled in a bearing and a drive wheel 8 of the usual type is mounted thereon. The leg sections 2 are formed on their lower ends with enlarged portions 9 which are slotted for the reception of friction clutch members 10 pivotally secured within said slots, so as to bear against telescopic leg members 11 adapted to slide within the upper leg members 2. The upper leg members are further provided with longitudinally extending slots 12 and the telescopic leg members 11 are provided with pins 13 adapted to slide in said slots 12. lThe telescopic leg sections 11 are also formed hollow so as to receive lower leg sections 14 which are united near their lower ends by horizontally extending side bars 15, which side bars support a treadle holding bar 1G. The upper end of the lower leg 14 is preferably formed hollow and provided with a slot 17, in which an inclined stop arm 19, (of the holding spring 18) is adapted to move; the spring 18 is secured by a pin 20 to the up per end of the bottom leg member 14, and carries on its upper end a laterally extending pin 21, which is adapted to partially engage an opening or aperture located near the lower end of the intermediate leg section 11.

Then the leg members are extended in the positions indicated in Figs. 1 and 2, the pin 13 of the intermediate leg member 11 will engage the lower end of the slot 1Q of the upper leg member, and the shoulder of the inclined stop arm 19 will engage the lower end of intermediate leg member 11, while the pin 21 will enter the adjacent opening in said intermediate leg so as to effectively hold the legs extended. The friction clutches 10 are preferably weighted at 10a so as to automatically bear against the adjacent portions of the intermediate leg members 11, and said clutch members are pivotally connected with upwardly extending rods 22 having pivot connections with rocker arms 23 pivotally secured by means of plates 24 with the under side of the table top l. The remaining ends of the rocker arms 23 connect with horizontally extending rods 25 which in turn are connected to rocker arms 26 pivotally secured to the under side of the table top l. The rocker arms 26 are located centrally of the front and rear edges of the table top and near the opposite ends thereof and are connected to outwardly extending operating rods 27 which are provided on their ends with hand holds 28. Normally, the friction clutches l0 hold the intermediate leg members 11 in fixed positions on the upper leg members 2 and when it is desired to slide said intermediate leg members on the upper leg members, the friction clutches 10 are operated by moving the operating rods 27 outwardly, which action transmits motion to the vertical rods 22 and withdraws the bearing surface of the friction clutches l0 from engagement with the intermediate leg members l1. Then it is desired to telescope the lower leg members within the intermediate leg members, the inclined stop arms 19 and the adjacent pins 2l of the holding spring 16 are moved inwardly thereby allowing the lower leg members to slide freely within the intermediate leg members.

The drive wheel 8 is provided with the usual pitman connecting arm 28 and the treadle supporting bar 16 has secured thereon upstanding bearing blocks 29 which pivotally support a shaft 30 having a treadle 31 mounted thereon. The treadle 3l is formed with a bearing arm 32 and a pitman section 33 having a notched or serrated edge 34 is connected by means of a bolt 35 thereto, and a second pitman section 36 formed with a similarly notched edge adapted to engage with the edge 34 is secured by means of a nut 37 with the arm 28 of the drive wheel 8. The pitman sections 33 and 36 are adapted to slide within a clamping block 38 having a clamping screw 39 thereon which is adapted to force the notched edges of the pitman members against each other. By loosening clamping screw 39, the pitman sections 33 and 36 may be adjusted to correspond with the adjustment of the table leg.

My improved adjustable table and adjustable pitman can be used in connection with drop head sewing machines or with the older type of sewing machines and in no way interferes with the drive mechanism or constitutes an obstruction for the machine or drawers thereof.

I claim 1. In a device as set forth, a table top, a plurality of hollow leg sections secured to the under side thereof, friction clutches pivotally secured to the lower ends of said leg sections, intermediate leg sections slidable within the iirst leg sections adapted to be engaged by the friction clutches, means having connections with said clutches for operating the same, lower leg sections slidable within the intermediate leg sections and provided with slots, said lower leg sections being hollow and having spring members secured therein having inclined stop-arms designed to project through said slots, said inclined stop arms being adapted to be cooperated with by the lower ends of the intermediate leg sections so as to hold the lower leg sections extended, said lower leg sections and said intermediate leg sections having registering apertures or openings, said spring members having pins to extend through said apertures, in order to hold said lower and intermediate leg sections extended, said first named leg sections and the intermediate leg sections having slot and pin connections in order to guide the sections when being extended.

2. In a device as set forth, a table top, a plurality of hollow leg sections secured t-o the under side thereof, friction clutches pivotally secured to the lower ends of said leg sections, intermediate leg sections slidable within the first leg sections adapted to be engaged by the friction clutches, means for operating said clutches, lower leg sect-ions slidable within the intermediate leg sections and provided with slots, said lower leg sections being hollow and having spring members secured therein having inclined stop-arms designed to project through said slots, said inclined stop arms being adapted to be coperated with by the lower ends of the intermediate leg sections so as to hold the lower leg section extended, said lower leg sections and said intermediate leg sections having registering apertures or openings, said spring members having pins to extend through said apertures, in order to hold said lower and intermediate leg sections extended, said first named leg sections and the intermediate leg sections having means in order to guide the sections when being extended.

3. In a device as set forth, a table top, a

plurality of hollow leg sections, intermediatev leg sections, friction members for holding the intermediate and the first named leg sections in adjusted posit-ions, means for operating the frictionvmembers, means for guiding the first named and intermediate leg sections when being adjusted, lower leg sections slidable within the intermediate leg sections and provided with slots, said lower leg sections being hollow and having spring members secured therein having inclined stoparms designed to project through said slots, said inclined stop arms being adapted to'be coperated with by the lower ends of the intermediate leg section so as to hold the In testimony whereof I have signed my lower leg section extended, said lower leg name to this specification in the presence of sections and said intermediate leg sections two subscribing witnesses.

having registering apertures or openings, VIRGINIA GIBBINS. 5 said spring members having pins to extend Witnesses:

through said apertures, in order to hold said J. T. GIBBINS,

lower and intermediate leg sections extended. M. N. EDDY.

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