US3008500A - Detachable and adjustable table extension - Google Patents

Description

Nov. 14, 1961 G. D. SiEMANTEL DETACHABLE AND ADJUSTABLE TABLE EXTENSION 2 Sheets-Sheet 1 Filed July 8, 1958 mm m m am m \\\\\\T m mm 8 om mm QR 650. D S/EMA/VTEL ATTORNEY Nov. 14, 1961 G. D. SIEMANTEL DETACHABLE AND ADJUSTABLE TABLE EXTENSION 2 Sheets-Sheet 2 Filed July 8, 1958 INVENTOR G50. 0. SIEMANTEL ATTORNEY United States This invention relates to new and useful improvements in attachments for power tool tables such as those on table saws, band saws, jointe'rs and belt sanders.

When working on relatively long lengths of stock with power tools of the character involved due to the portron extending beyond the edges of the power tool table, two men are generally required to maintain the material in a proper horizontal position to be worked upon, one maintaining the stock level and the other moving it through the tool.

A primary object of this invention is to provide a detachable and adjustable table extension for power tools, the attachment being readily and economically manufactured, easily installed, removed and adjusted, and highly satisfactory and practical for the purpose intended.

' Further objects of the subject invention reside in details of the table extension which facilitate the adjustment and detachability of the same.

' Other objects and a fuller understanding may be had by referring to the following description and claims, taken in conjunction with the accompanying drawings, in which:

FIGURE 1 is a side elevation of the novel extension table in relation to a fragmentary portion of a typical power tool upon which it is mounted;

FIGURE 2 is a top plan view of FIGURE 1;

FIGURE 3 is an enlarged fragmentary section taken substantially on line 33 of FIGURE 2;

7 FIGURE 4 is an enlarged section taken on line 4-4 of FIGURE 1; I

FIGURE Sis a side elevation similar to FIGURE 1 showing another embodiment of the novel table extension;

FIGURE 6 is a top plan view of FIGURE FIGURE'7 is an enlarged section taken on line 77 of FIGURE 5, portions being broken away; and

FIGURE 8 is a fragmentary view similar to a portion of FIGURE 7, showing another embodiment of longitudinal reinforcing beam for'the extension table.

Referiug to FIGURES 14, a fragmentary portion of a power tool is indicated generally at 10 including vertical legs 12 (only one shown) supporting a horizontal table 14. Indicated generally at 16 is the table extension of the invention which is adjustably and detachably supported as will subsequently be described in detail. In order to modify the power tool to accommodate the attachment 16, secured to the edge 18 of the table is an angle member 20, the vertical flange 22 thereof being secured to the edge 18 by means of suitable nut and-bolt assemblies 24, V and the laterally projecting flange 26 thereof has longitudinally spaced drilled portions for receiving-a bolttherethrough.Securedcentrally of a transverse lower plate 28' is studelement 30 which includes an upwardly extending portion 32. v

The table extension 16 comprises an elongated planar body member 34'of any suitable. metal such as cast aluminum, for example, and may include cut out portions 36 to lighten the same: The body member includes on its'underside a depending lug 38 transversely apertured at '40 as most'clearly seen in FIGURE 3. Formed in the upper surface 41 of the body member and opening into the end 42 and sideedges 44 and 46 thereof are similar elongated recessed portions 48 for accommodating miter gauges; for example. The body member includes spaced counter sunk bores for receiving suitatent i 2 able bolts 49 which extend through the longitudinally spaced apertures in the flange 26 and an intermediate spacer block 50 of any suitable thickness, and wing nuts 52' are secured onvthe lower ends of the bolts 49 for detachably retaining the body member to the table of the power tool. t

The table extension 16 includes at its other end 54 a transverse recessed portion 56, apertured at 58 for accommodating nut-and-bolt assemblies (not shown) to provide means by which cooperating portions of another table extension element (not shown) may be secured.

The lug 38 receives through the aperture 40 a threaded stud 59 which includes on one end thereof a jam nut 60.

Journaled on the stud 59 is the eye portion 62 of a threaded bolt 64 which forms a part of a turnbuckle assembly indicated generally at 66. The stud includes thereon a washer 68 and clamping nut 70 to secure the bolt 64 in a predetermined angular relation relative to the general plane of the body member 34 and in axial alignment with end 32 of the stud 30.

The turnbuckle assembly 66 includes an elongated threaded stud 72 having threads cut opposite those of bolt 64 and an elongated cooperating nut element 74 secures opposite ends of the bolt and nut together. Suitable jam'nuts 76 are provided on the stud and bolt to maintain the turnbuckle assembly in an adjusted condition, stud 72 is fixedly secured in the upper end of a tube 78, the lower end of the tube being received on the end 32 of the stud 30. A transverse handle 79 extends through an intermediate portion of the tube to facilitate ready rotation of the tube.

The body member 34 will have sufiicient flexibility whereby the turnbuckle nut '74 may be rotated to dispose the upper surface 41 of the body member in co-planar relation with the upper surface of the bed 14 of the power tool. The table extension may be left on the power tool when it is not being used, or if space is at a premium, the extension may be readily removed from the power tool by'disengaging the wing nuts 52 from the bolts 49, it being noted that the tube 78 can be readily slid off the stud 30. Remounting the table extension involves a procedure the reverse of that just mentioned, if the tube has been left to remain inits previously adjusted condition. However, if readjustment is required it may be accomplished in a simple and expeditious manner through the expedient of the turnbuckle assembly 66and clamping nut 70.

In order to facilitate movement of a work piece on the table extension and support those portions projecting beyond the side edges 44 and 46 thereof, a plurality of support rods 80 are provided. Each of the rods 80 include a threaded shoulder end 82 received in a threaded bore 34 opening into the side edge of the body member, the rods being of any desired length and having a longitudinal surface portion coplanar with the surface 41 of the body member as clearly seen in FIGURE 4. The longitudinal axis of the rods 80 is angularly directed approximately 1 degree i.e. 89 degrees with respect to edges 44 and 46; see FIGURE 2 or FIGURE 6, toward the direction of travel of the Work piece moving from end 42 toward end 54 of the body member 34. Through this expedient the leading edge of a work piece encounters a minimum resistance when first moving onto the rods since the leading edge of the work piece first engages that ofthe rods 80 closest to the side edges 44 and 46 in its movement along the extension table. The terminal Patented Nov. 14, 1961 3 power tools. The elements 88 include a transverse bore 90 through which the rods 80 extend, and a threaded bore 92 communicates with the bore 90' and receives a clamp screw 94 therein. The clamp screw includes an eye portion 96 convenient for adjusting the screw during installation and removal of the elements 88, also for hanging the attachment up when removed from the power tool.

Considering FIGURES -8, another embodiment of the table extension is indicated generally at 100', this embodiment being installed and adjusted in substantially the same manner as the embodiment previously descn'bed, but including a body member formed of wood instead of metal. The power tool will be modified or have as a factory installation the stud 30 including the upwardly directed end 32, and the angle member including flanges 22 and 24 for the purposes previously mentioned.

The table extension 100 comprises a suitable wooden body member 102 having secured therebeneath by means of recessed bolts 104 transverse brace elements 106, 106 and 106", which willtend to prevent the body member from warping. Secured in depending relation longitudinally beneath the body member 102 by bolts 103 is a Wooden beam 110 which also braces the body member against warpage. A suitable tapered shim 112 may be utilized between the beam 110 and brace element 106 to correct for longitudinal bowing of the body member. The beam 110 may comprise a pair of juxtaposed elongated elements 114 which are retained together by screws 116, this expedient obviating warping of the beam, or a metal strip (not shown) may be inserted in one sidefor the same purpose.

The beam 110 receives a wing nut-and-bolt assembly 113 therethrough to which is secured the eye portion 120- of a bolt 122 forming part of a turnbuckle assembly 124. The bolt is preformed whereby the threaded end has a fixed annular relation to the general plane of the body member 102 and will be in axial alignment with end 32 of the stud 30. The turnbuckle assembly 124 includes an elongated nut 125 terminating in a projecting shaft 126' which is fixed in the end of a tube 128 by means of welding, for example. The lower end of the tube is telescoped on end 32 of the stud 30 and is rotatable thereon. i am nuts 130 are provided on the bolt 122 and shaft. 126 for engaging the nut 125 to maintain the parts in adjustment. The tube includes a transverse rod 132 therethrough to facilitate rotation of the tube and nut 125 to maintain the upper surface co-planar with the upper surface of the table of the power tool. As seen in FIGURE 8, the wooden beam 110 may be replaced by a metal beam 110' if desired.

To accommodate the rods 80 on the body member 102, see FIGURE 7, brackets 134 are provided, each of these brackets including a leg 136 secured beneath the body member 102 by recessed bolts 138, and a leg 140 includes a bore 142 normal to leg 140 to accommodate the threaded shoulder portions of the rods 80' therein, and so that the top surface of rods 80 will be maintained coplanar with upper surface of the table 102. In leg 136 are drilled two holes to receive bolts 138 longitudinally centered and near each end of leg 136. The holes near leg 140 are drilled the exact size for bolts 138, and the holes nearest the'center of the body member 102 are drilled inch larger than the bolt size. This permits tightening of the outside end bolt first, then pulling the rod 80 back in angular relation to the leading edge of a work piece for the purpose previously described and then tightening the inside end bolt. This is an economical way of manufacturing and obviates the need for right and left hand brackets as well as mistakes in application.

The table extension 100 may be adjusted through the medium of the turnbuckle assembly 124, and may be readily removed and installed in the manner previously described.

From the foregoing description considered in connection with the accompanying drawings, it is believed-that the construction and advantages of the novel table extension will be readily appreciated. Although several embodiments have been disclosed, it will be clear that minor changes may be made in details of construction'without departing from the. spirit of the invention. This invention is not to be limited .tothe precise details described, but it is intendedto cover all variations and modifications falling within thescope of the claims.

Having thus described the invention, what is claimed 1. A table extension attachment for power tools comprising an elongated body member having an upper surface to be disposed in coplanar relation to the power tool table, means on one end of the body member for detachably connecting the body member to the power tool, and extensible brace means angularly. depending from an undersurface portion of said body member, said brace means including a lower end portion comprising means for free removal from a cooperating portion on the power tool, said. attachment including support means for modifying the power tool, said support means comprising an angular stud element for securement in upwardly extending relation from a lower portion of the power tool and terminating in a portion removably engaging said lower end portion of the extensible brace means, and a mounting member including separable fasteners to facilitate ready mounting and removal of the attachment from the power tool, said extensible brace means including a tubular rod removably receivable at one end on said stud element, means on said tube for rotating it about its longitudinal axis, an elongated threaded shaft, integral with said tube and projecting from the other end thereof, an elongated nut engageable at one end on said threaded shaft, a bolt projecting ang-ularly from the undersurface of said body member and engageable at the other end of said elongated nut, and lock nut means engageable with ends of said elongated nut, bolt and shaft for retaining the parts in adjusted relation. 7

2. In a table for power tools comprising an elongated body member having anupper surface, support rods extending laterally from side edge portions ofsaid body member for supporting a portion of a work piece thereon, each. of said rods including a portion co -planar with the upper surface of said body member, said rods having a circular cross section in which a linear longitudinal surface portion thereof is said portion co-planar with the upper surface of said "body member, said rods being disposed in angular relation away from the edge portions of said body member whereby the leading edge of a work piece moved over said body member will initially engage that portion of the rods immediately adjacent the edge of the body member.

3. The structure of claim 2 inwhich. said rods include removable elements thereon alignable to provide a laterally adjustablerip fence on said rods.

References Cited in the file of this patent UNITED STATES PATENTS 1,405,599 Lane Feb. 7, 1922 1,474,323 Geibel i Nov. 13, 1923 1,567,441 Howard Dec. 29, 1925 1,762,740 Rains June 10, 1930 2,230,929 Bray et al. Feb. 4, 1941 2,533,894 Podell Dec. 12, 1950 2,697,458 Cue Dec. 21, 1954 2,722,243 Nagy Nov. 1, 1955 2,816,783 Robertson Dec.v 17, 1957 FOREIGN PATENTS 148,555 Switzerland Oct. 1, 1931 309,648 Switzerland Nov. 16, 1955

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