US2301420A - Leg cushion for sewing machine tables - Google Patents

Description

10, 1942- A. LIABASTRE LEG CUSHION FOR SEWING MACHINE TABLES Filed m 2, 1942 a E. Y m E Km, M H Ww WM Patented Nov. 10, 1942 R SEWING MACHINE LEG CUSHION F0 ABLE S 3 Claims.

This invention is a device adapted to be positioned beneath the leg of a sewing machine table of the kind commonly used for the supporting of electrically operated sewing machines of the production trade. Such tables generally have wooden tops with metal legs adapted to rest upon the floor. The machines embody relatively heavy parts which, when in operation, transmit considcrable vibration through the table and its legs to the floor with the result that the floor of the building, as well as the walls thereof, act as a sounding board to magnify this vibration to such degree as to cause considerable annoyance to other occupants in the building.

To obviate this transmission or vibration to the floor, it has been heretofore suggested to interpose between the legs of the machine and the floor felt cushioning pads. For reasons well known to the trade these cushioning pads have not been satisfactory and in a companion application, of even date, Serial No. 441,560, I have described and claimed a cushioning device of rubber and metal which has proven in practice to give highly satisfactory results. In the said companion application a slab of relatively soft rubber is adapted to rest on the floor beneath each leg of the machine and to the lower end of each leg is attached a metal plate which rests upon the rubber slab and is provided around its periphery with a depending skirt surrounding and embracing the upper portion of the pad. The metal Cit plate is generally secured to the leg by forming at the bottom of the leg oppositely and laterally extending cars which are bolted to the plate.

The present invention employs a rubber slab I.

with an overlying plate and depending skirt, but the leg of the sewing machine table is so formed and associated with the plate that it may be secured to the plate by means of a single bolt.

This economizes in material, facilitates the assembly of the parts, and leaves the exposed surface of the plate unencumbered by fastening devices which, in practice, tend to accumulate lint, dirt and other extraneous matter.

In carrying out the invention in its preferred practical form, the legs of the sewing machine table are formed from channel iron or steel which may be in the form of rolled sections or pressed up from sheet stock. The flanges of the channel section are cut away at the lower end of each leg and the base of the channel section is folded into abutting relation with the lower edges of the flanges and is centrally perforated so that a bolt may be passed through its central perforation and through the central hole in the cushion plate to secure the parts together. To preclude relative rotation between the leg and the plate, the base of the channel section is preferably provided with an integral finger adapted to engage with the perforation of the plate remote from the anchoring bolt and through the cooperation of this finger and perforation the parts are locked against relative rotation.

Features of the invention, other than those adverted to, will be apparent from the hereinafter detailed description and appended claims, when read in conjunction with the accompanying drawing.

The accompanying drawing illustrates one practical embodiment of the invention, but the construction therein shown is to be understood as illustrative, only, and not as defining the limits of the invention.

Figure 1 is a perspective view showing the lower end portion of a sewing machine table leg constructed in accordance with the present invention and having associated therewith a cushioning device embodying the invention.

Figure 2 is a fragmentary perspectiveview of the lower portion of the leg as viewed from the outside of the leg. In this View the flanges of the channel section are cut away but the projecting end portion of the channel section has not been bent into abutting relation with the lower ends of these flanges.

Figure 3 shows the parts in the same condition as in Figure 2 but viewed from the inside of the leg.

Figure 4 shows the base of the channel section bent into finished position with the leg portion illustrated above the cushioning device and sep arated therefrom, in the interest of clearness.

Figure 5 is a section on the line 5-5 of Figure 1.

Figure 6 is a View similar to Figure 5, but showing a modified form of the invention.

Referring to the drawing l designates a lower end portion of a table leg of a sewing machine table. This leg is shown in the form of a relatively thin channel section. This channel section comprises a base 2 from the lateral edges of which extend flanges 3 and 4. In fabricating this leg, the lower end portions of the flanges are cut away as shown in Figures 2 and 3 for a vertical distance substantially equal to the horizontal depth of the flanges 3 and 4, so that the lower edges 5 of the resulting flanges are spaced above the lower end of the base 2, which thus projects an appreciable distance below the edges 5 as indicated at 6.

In the central portion of the extension 6 is formed an integral boss I and this boss is centrally perforated as shown at 8 for an attaching bolt. The free end of the extension 6 is provided with a projecting finger 9 of a length substantially equal to the thickness of the stock employed. This finger 9 is thereafter bent into right angular relation with the extension 6, as indicated in dotted lines in Figure 4, and thereafter the extension 6 is folded into the horizontal position, as indicated by the arrows ID, to partake of the full line position shown of Figures 1, 4 and 5 wherein the lateral margins of the extension 6 will abut the lower edges 5 of the flanges 3 and 4. The extension 6 may be welded to these edges 5 if desired, but in practice this is ordinarily not found necessary.

The leg thus formed is adapted to rest upon the upper surface of a plate ll of somewhat larger size than the extension 6 and provided at its outer margin with a depending skirt l2, which embraces the upper portion of a slab 13 f relatively soft rubber positioned beneath the plate 1 i.

The plate I I is provided with a central perforation 14 adapted to register with the perforations 8 of the leg extension 6 and with a second perforation 35 adapted to receive the finger 9. Anchoring bolt 16 is passed upwardly through the perforations i4 and 8 in succession and the nut of said bolt is screwed thereon and seats upon the upper surface of the boss 8 to firmly bind the leg to the plate Ii. The head of the bolt M may be received in a concavity or recess formed centrally in the upper surface of the rubber E3.

The parts described may be efficiently and economically manufactured and may be assembled or dismantled easily and expeditiously. When assembled there are no exposed attaching devices for the bolt is housed within the confines of the channel section, leaving the upper surface of the plate, as well as the exterior faces of the channel section wholly free, smooth and unencumbered. There is no projecting exterior part to accumulate dirt, lint or other extraneous matter and an operator leaving, approaching or passing a machine cannot trip over exposed and projecting attaching devices.

In the accompanying drawing the finger 9 is shown as formed on the extension 6 with a cooperating perforation formed in the plate H. If desired this arrangement may be reversed, as shown in Figure 6, by simply stamping up from the plate H a finger 9a corresponding to the finger 9 and by forming a cooperating perforation lEia, corresponding to the perforation 15, in the extension 6. found to be more economical in material and is to be understood as part of the present invention.

In the preferred form of the invention, the skirt [2 of the plate II is preferably curved outwardly as described in my copending applications for the reasons therein given, but the mode of attachment of the leg and plate and the mode of forming the leg for such attachment is not lim- This latter construction may be ited to use exclusively with any particular formapended claims.

Having thus fully described the invention, what I claim as new and desire to secure by Letters Patent is:

1. In an assembly of the character described, a sewing machine table leg of channel section adapted to stand in upright position and the flanges of which are cut away at their lower ends to leave the lower end portion of the base projecting below the lower edges of said flanges, said projecting portion being bent into horizontal position into engagement with and underlying the lower edges of the flanges and perforated for the passage of an anchor bolt, a plate underlying the leg and perforated in registration with the perforation of the leg, an anchor bolt extending through said registering perforations to anchor the plate to the leg, and cushioning means positioned beneath said plate and adapted to rest on the floor.

2. In an assembly of the character described, a sewing machine table leg of channel section adapted to stand in upright position and the flanges of which are cut away at their lower ends to leave the lower end portion of the base proj ecting below the lower edges of said flanges, said projecting portion being bent into horizontal position into engagement with and underlying the lower edges of the flanges and perforated for the passage of an anchor bolt, a plate underlying the leg and perforated in registration with the perforation of the leg, an anchor bolt extending through said registering perforations to anchor the plate to the leg, cushioning means positioned beneath said plate and adapted to rest on the floor, and means for additionally securing the leg to the plate to preclude relative rotation between the plate and the leg.

3. In an assembly of the character described, a sewing machine table leg of channel section adapted to stand in upright position and the flanges of which are cut away at their lower ends to leave the lower end portion of the base projecting below the lower edges of said flanges, said projecting portion being bent into horizontal position into engagement with and underlying the lower edges of the flanges and perforated for the passage of an anchor bolt, a plate underlying the leg and perforated in registration with the perforation of the leg, an anchor bolt extending through said registering perforations to anchor the plate to the leg, and cushioning means positioned beneath said plate and adapted to rest on the floor, there being formed on the horizontal portion of the base of the leg a projection extending into a perforation in the plate remote from the anchor bolt to preclude relative rotation between the plate and the leg.

ALBERT LIABASTRE.

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