US2206774A - Power sewing machine table - Google Patents

Description

55 I 1 F o\ Lax y 2, 1940-, H. T. HALLOWEYLL 2,206,774

POWER SEWING MACHINE TABLE Filed Dec. 14, 1956 3 Sheets-Sheet l July 2, 1940. H. 1-. HALLOWELL POWER SEWING MACHINE TABLE Filed Dec. 14, 1936 3 Shuts-Sheet 2 July 2, 1940.

H. T. HALLOWELL ,206,774 POWER SEWING MACHINE TABLE Filed D60. 14, 1936 3 ShQBtS-ShQBt 5 I heroz arf 1 ig flamzv Patented July 2, 1940 6 UNITED STATES POWER SEWING MACHINE TABLE Howard 'I. Hallowell, Jenkintown, Pa., assignmto Standard Pressed Steel 00., Jenkintown, Pin, a corporation of Pennsylvania Application December 14, 1936, Serial No. 115,866

2 Claims.

This invention relates to improvements in leg structures for power-operated sewing machine tables.

One object of the invention is to provide a leg structure that shall be characterized by strength and durability coupled with a high degree of adjustability,

Another object of the invention is to provide a leg structure affording independent adjustment of the table-top and of the bearings for the line shafts.

Toward this latter end another object of the invention is to provide a novel and improved form of adjustable shaft bearing bracket.

A further object of the invention, is to provide in a leg structure of the stated type a novel and improved means for supporting the trough which forms a part of the conventional table structure.

A still further object of the invention is to provide a trough-supporting device that shall be adaptable for use with troughs both of metal and of wood.

Another object of the invention is to provide a novel means for supporting and clamping a metal trough in the table structureso that it will be entirely free from vibrationnoises.

The invention further resides in certain novel structural features and details I hereinafter set forth and illustrated in the attached drawings, wherein:

Figure l is a view in perspective of a table leg structure made in accordance with my invention; i

Fig. 2 is a fragmentary sectional view on the line 2-2, Fig. 1;

Fig. 3 is a detached view in perspective of one of the shaft-bearing support brackets;

Fig. 4 is a view in perspective of a modified form of leg structure. within the scope of the invention;

Fig. 5 is a detached View in perspective of one of the elements of the leg structure shown in Fig. 4;

Fig. 6 is a fragmentary transverse sectional view showing one form of trough support;

Fig. 7 is an enlarged fragmentary sectional View showing details of the construction illustrated in Fig. 6; l i

Fig. 8 is a sectional view on the line 88, Fig. 6; f

Figs. 9 and 10 are, respectively, fragmentary views inperspective showing a detail of the construction;

Figs. 11 and 12 are fragmentary sectional views similar to that of Fig. 6 and illustrating modified forms of trough support;

Figs. 13 and 14 are enlarged fragmentary sectional Views showing details of the construction illustrated in Figs, it and 12, respectively;

(01. fill- 13) Figs. 15 and 16 are, respectively, sectional views on the lines l5-l5 and l6l6, of Figs. 13 and 14, respectively;

Fig. 1'7 is a fragmentary sectional view showing a modified form of trough structure as applied to the trough-supporting means of the character shown in Fig. 6;

Fig. .18 is an enlarged fragmentary sectional view showing details of the construction shown in Fig. 1'7;

Fig. 19 is a view in perspective of trough elements, and j I Fig. 20 is an end elevational View of the trough section shown in Fig. 19.

With reference to the drawings, the leg structure illustrated in Figs. .1 to 3, inclusive, cornprises spaced uprights I, l cross sectionally of U-formation which constitute the base elements of the legs proper. Theseuprights l, l are con nected by a transverse member 1.. in the form of an inverted channel the ends of which, preferably, are welded within the channels of the respective uprights i, l. Each of the uprights i is supported upon a foot member 3 preferably in the form of plates having inverted cup-like mid sections to which the lower edges of the uprights l are welded. Slidably mounted in the channel of each of the uprights i is an upper leg section l of U-shape cross section which carry an upper transverse member 5, the memher 5 being in the form of an inverted channel, and the upper ends of the leg sections 4 preferably being welded in the latter. Each of the upper leg sections 4 has a longitudinal slot t which lies in registration with an aperture in the outer side of the associated lower leg section 6, and bolts 1 pass through the said registering apertures and slots and constitute a means for securing the upper leg sections i! in adjusted position within the lower leg sections. Preferably. the fit between the respective upper and lower leg sections is sufficiently loose to permit a limited longitudinal adjustment of one of the telescoped legs l-d independently of 'the other leg to thereby adjust the top member 5 angularly with respect to the surface upon which the leg structure may be mounted.

Immediately above the cross bar 2 each of the uprights I is provided in its outer surface with a slot B and to this slotted portion of each of the uprights is clamped a bracket 6. This bracket as shown in Figs. 2 and 3 comprises an angle piece H constituting the bracket proper the vertical web l2 of which is secured preferably by welding to the face of a plate E3. The plate I3 in assembly and as shown in Fig. 2 is adapted to engage the inner side of the associate upright l, and the vertical edge portions of the plate It are channeled, as indicated at M, for reception of the vertical edges of the upright I. .A bolt [5 one of the passes through apertures in the vertical web of the bracket I I and in the plate I3 and through the slot 6 in the associated upright I, and also through an aperture in a U-shaped clamping element I6 which engages and embraces the outer face of the upright I. tightened on the bolt I5 against the web I2, see Fig. 2, the plate I3 and the clamping element I6 are drawn together upon the opposite sides of the upright I and securely clamp the bracket in adjusted position upon the upright. The brackets 9 as indicated in broken lines in Fig. 1 are adapted to support bearings I8 in which are journaled the line shafts I9, these shafts in assembly extending longitudinally of and below the top of the table and having connection with the individual sewing machine units. Preferably the bearings I8 are of the type in which the journal proper 2| which directly supports the shaft is mounted on transverse trunnions 22 in a supporting base 23, the latter being secured on the bracket 9 by means of bolts extending through a longitudinal slot 24 in the horizontal web of the latter. By reason of this construction the journal-s are to a degree self-adjustable, and otheradjustments to effect true alignment of the respective shafts I9 may be effected through adjustment of the base 23 upon the bracket II and by adjustment of the bracket II onthe upright I.

Depending from the under side of the top transverse bar 5 is a saddle strap 25 which is adapted to support a trough II, the trough in assembly extending longitudinally of the table structure. In Figs. 6 to 16, inclusive, I have illustrated three different methods of supporting the saddle strap 25. In the embodiments shown in Figs. 6 to 10, inclusive, the upper ends of the saddle strap 25 are attached to opposite ends of a transverse channel member 26, the upper terminal ends of the saddle strap 25 being turned inwardly, as indicated at 21, into the bottom and at the opposite ends of the channel 26 and being welded to the latter. To afford rigidity and strength in the saddle 25, the latter as shown in Fig. 9 is provided with a centrally located longitudinal pressed-out rib 28, this rib extending continuously from one extremity to the other and projecting from the inner surface of the saddle. The rib 28 in the inturned portions 21 of the saddle passes downwardly into slots 29 provided at each end of and in the bottom wall of the channel member 26. As previously set forth, these inturned ends are welded to the transverse member. This saddle structure may be suspended from the transverse top member or channel 5 of the leg structure by means of a single bolt 3| which passes downwardly through a slot 32 in the transverse member 5 and through the bottom of the upright channel member 26 of the saddle structure, said bolt supporting the member 26 in the channel of the transverse member 5, as illustrated in Fig. 8.

In the embodiments shown in Figs. 11, 13 and 15, the saddle strap 25a is provided at each extremity with an eye 33 adapted for reception of bolts 34 which pass transversely through the depending webs of the channel cross bar 5, see Fig. 15, and. which thereby support the extremities of the saddle 25a in the under side of the cross bar.

In the embodiments shown in Figs. 12, 14' and 16, the upper turned-out extremities of the saddle strap 25b are supported between the depending sides of the cross bar 5 upon U-shaped plates When the nut I1 is I 35 which embrace the under side of the cross bar 5 and are fastened to the cross bar by bolts 36 which extend downwardly from the top of the latter and through apertures in the turnedout extremities of the saddle strap 25b and in the plate 35, a nut 31 engaging the lower threaded end of the bolt 36 at the under side of the plate 25. In each instance it will be noted that the saddle member is supported at the top on the cross bar 5 and in effect is suspended from the latter. 9

In the table assembly a plurality of the leg structures described above are arranged in alignment at spaced intervals and are united at their tops by means of suitable longitudinal top elements which rest upon and are positioned at opposite ends of the cross bars 5, and are secured to the cross bars by means of bolts (not shown) which pass through slots 38 provided for their reception in the top and at the ends'o-f the cross bar 5, as indicated in Fig. 1. In Figs. 6, '7, 11, 12, 13 and 14, the table-top members referred to above are indicated by the reference numeral 39. As illustrated, these top members extend inwardly from the edges of the table to the opposite sides of the central trough. In a preferred embodiment, the said trough is composed of a plurality of longitudinal sections corresponding in length to the distance between the respective leg structures, and one of these sections is shown in Figs. 19 and 20 and is designated by the reference numeral M. This trough section in the present instance is composed of two parts, 42, 42, which respectively form the sides of the trough and half of the bottom. Each of the parts 42 has at its lower inner edge a depending flange 43, which flanges abut each other and preferably are bolted together to thereby unite the portions 42. The side walls of the trough are slightly flared and correspond in this respect to the form of the saddles 25, 25a and 25b. At the upper longitudinal edges the side walls are turned. outwardly and downwardly, as indicated at 44, to form. in effect a resilient bead at the upper longitudinal edges of the trough, and at the top of these beads is secured by suitable means a plurality of pads or gaskets 45 which may suitably be formed of sheet cork and which function for a purpose hereinafter described. In assembly, the respective terminal ends of each trough section are secured to the saddle 25, 25a or 25b of adjoining leg structures, and the trough being of greater depth than the saddle, the upper edges thereof project above the top of the saddle and to a point above the upper surface of the upper cross bar 5 of the leg structure. To this end, each of the upper corners of the trough section is cut away as indicated at 46 to accom modate the cross bar 5, the complementary cut- I cuts 46 of the adjoining trough sections being of a width to afford a relatively close fit between the trough and the said cross bar 5.

As shown in Figs. 6, '7, 11, 12, 13 and 14, the inner edges of the table-top elements 39 are rabbetted from the under side, thus providing a recess 41 into which fits the beaded upper edges of the trough 4|. The dimensions of the various parts are such preferably that in assembly the table-top elements bear forcibly upon the upper beaded edges of the trough and upon the pads 45 secured thereto, as previously described, so that the upper edges of the trough are placed under slight but positive compression, the major contact falling upon the pads 45. In this manner, any tendency towards looseness and noise due to vibration of the metallic trough is or other suitable gasket or pad 49, this precluding any possible noise by reason of vibration between the metallic trough and the saddle.

In the embodiment shown in Fig. 11, which corresponds in all other essential respects to that disclosed in Fig. 6, the trough 4| occupies a position in the interior of the, saddle a, being securedto the latter through the medium of the bolts 48, and if desired, a suitable gasket may be interposed between the saddle and the trough.

. When the trough is positioned on the inside of the saddle, as in Fig. 11, it is necessary to cut back the flanges 43 from the terminal end of each trough section to an extent providing a recess for accommodation of the saddle 25a. 1

Inthe embodiment shown in Fig. 12, the trough occupies the same relative position with respect to the saddle 251) as does the trough to the saddle 25a in the embodiment of Fig. 11. It will be noted by reference to Fig. 19 that the apertures 5| in the trough provided for reception of the bolts 48v are elongated longitudinally of the trough to 1 thereby facilitate the proper mounting of I the trough elements in the saddles with the edges of the adjacent trough sections in contiguous relation.

In the embodimentshown in Figs. 1'7 and 18, the manner of securing thetrough to the cross member 5 corresponds to the arrangement illustrated in Figs. 6 to 10, inclusive. In this instance,

however, instead of. employing a trough composed of metal, I build up the trough from a series of longitudinal wooden sections 52 which may be bolted against the inner faces of the saddles 25, the upper edges of the topmost of the wooden trough sections lying under and preferably being clamped at the inner rabbeted edges of the top members 39.

. In Figs. 4 and 5, I have illustrated a modified form of. leg structure involving substantially the same principle of construction as that of the leg structure previously described but of a character adapted for use with single-sided tables wherein the trough lies at the back of the table-top. In

I bination with spaced aligned leg structures, each this case, the form and construction of the uprights is similar to that described in the embodiment illustrated in Fig. 1, and the respective bracket 54 which supports the journal. The cross bar 53, as shown in Fig. 5, is of box formation and reinforced interiorly by oppositely disposed channel members 53, 53a. An aperture 55 is formed at each end in the cross member 53 for reception of bolts 5% which extend through slots 57 in the sides of the legs 9, thereby providing for adjustment of either or both ends of the cross bar 53 in the uprights.

It will be apparent from the foregoing description that the leg structures are strong and rigid, and that the construction provides for a high degree of adjustability to meetthe varying conditions under which tables of this character may be installed. The structure provides for adjustability as to effective height of, the table supported thereon and alsoyfor adjustment of the table-top to a true horizontal position, since the top member 5 or 5a may be adjusted to limited angles with respect to the base by individual adjustments of the upper leg elements t in the respective lower uprights as previously set forth. Provision is also made for accurate alignment of the line shafts I9 by individual adjustments of the brackets 9 or of the ends of the cross member 53. The construction thus provides for adjustment of the leg structures to compensate for irregularities in the floor or other supporting surface upon which they may be mounted. Accurate alignment of the leg, structures with respect to each other is thus provided for. The construction also provides for an extremely efiicient mounting of the trough in the leg structure through the medium of the depending saddle members, which as previously set forth are suspended from the upper cross bars 5 and 5a. This trough-supporting structure provides for a wide choice of trough structure, which as set forth may be made either of metal or wood. Provision is also made for eliminating noises between the various parts, and particularly between the metallic trough and the leg structure proper by employment of the dampening pads or gaskets described above. I

I claim:

1. In a power-sewing machine table, the comvtrough into. said channel, a member connecting the upper ends of said strap and extending longitudinally within the channel, and means for detachably securing said member to the cross bar.

2. In a power-sewing machine table, the comof said structures comprising an upper transverse cross bar of inverted channel form constituting a support for a. table top, of a trough extending between said leg structures and below said cross bars, a trough-supporting strap extending along the bottom and upwardly at the sides of said trough into said channel, an upright channel member extending longitudinally and secured within the inverted channel of said cross bar and having in each end thereof and at thebottom a slotted longitudinal recess, the said upper ends of said strap being turned into and being secured within the respective ends of said upright channel member, and a longitudinal reinforcing rib in said strap seating at the ends thereof in the respective recesses of said channel.

HOWARD T. HALLOWELL.

Images