US2459893A - Abrading device - Google Patents

Description

Jan. 25,1949. w, PETERSON 2,459,893

ABRADING DEVICE 2 Sheets-Sheet 1' Filed May 2'7, 1946 I? zflaziai pa ier m M2? 720% j] dmzw W: P. PETERSON ABRADING DEVI GE Jan. 25, 1949.

2 Sheets-Sheet 2 Filed May 27, 194

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- top II is curved adjacent to one I Patented Jan. 25, 1949 .FFICE I ABRADING DEVICE Walter P. Peterson. omca Ill; Application May 2'7, 1946, Serial No. 672,621

This invention relates to abrading devices or sanders which are adapted for various purposes and commonly used by carpenters and others as a hand tool forsmoothing or finishing cabinet work or other surfaces. Devices'of this kind are well known and their'uses generally understood, the present invention being an improvement in the construction and arrangement of parts of one of such sanders now inuse.

The objects of this invention areto provide an improved abrading device of siin-ple and durable construction having,novel or improved means for 2 Claims. (01. l-187) may be further which, is struck up out of the flat portion of the permitting the insertion of the abrading material and adjustment of the same; to provide an improved pivotal. connectionffor the shoe and hood of an abrading device; and to provide such other novel features and improvements as will be described more fully hereinafter.

In the accompanying drawings illustrating this invention,

Fig. 1 is a plan view;

Fig. 2 is a side view showing the device in operative or adjusted position;

Fig. 3 is a longitudinal sectional view showing the abrasive strip or web fastened in position;

Fig. 4 is a similar view showing the parts extended or adjusted to permit the insertion or removal of the abrading strip;

Fig. 5 is a sectional view taken substantially on the line 5-5 of Fig. 2;

Fig. 6 is a sectional view taken substantially on the line 3-45 of Fig. 2; and

Figs. '7 and 8 are details of a combined hinge and clamping member.

A hood or upper body member ill is shaped substantially as shown so that it may be conveniently grasped by the hand for ope-rating the tool. It is preferably channel-shaped in cross section with a top H and sides or flanges [2. The sides are cut away adjacent to one end as shown at 36 to provide a transverse opening for the roll comprising the sanding strip I4. The

end and terminates in a clamping edge I3. The opposite end of the hood is somewhat reduced in width and formed as shown to provide a clamping portion or rib IS with an adjacent groove 16.

The frame member or shoe I! is of substantially channel-shaped cross section and of approximately the same length as the body member [0. One end of the shoe is curved upwardly as shown at H; with its edge 19 opposed to the clamping edge l3.

A combined hinge and clamping member 20 of substantially semi-circular shape as shown in Fig. '7 fits in the curved end portion l8' and is spot welded or otherwise secured thereto. It held, and. braced by a tongue 2| shoe and is spot welded thereto at 22". The outer edge of the clamping member 20 has a flange 22 that fits over the edge 19 and coacts with the clamping edge 53 for holding the strip M- in adjusted positions. The clamping. member 20 has a pair of cars 23 that extend inwardly and are pivoted to'the sides 52 by means of pivots or rivets 2 3, thus forming a hinged connection between the hood and the shoe. Aform of spring rivets or fasteners known as cinch fasteners is convenient for use as such pivots.

The ends of the transverse opening which receives the roll of abrasive material M, are closed by discs or cover plates 25 which are united by an integrally formed cross bar 26 and which have rearwardly extending ears 2'! with holes for receiving the cinch fasteners 24. This arrangement is such that by lifting up on the cross piece 26, the cover plates 2%: may be swung out of register with the opening, thus permitting the easy insertion of the roll. It will also be noted that the cinch fasteners serve as double pivots namely for the hood and for the cover discs.

The opposite end of the shoe I1 is bent upwardly at a substantially right angle and has an opening 28 through which the projection l5 extends. The upper edge 29 of this opening coacts with the groove it for clamping the end of the abrasive strip. A stiff spring 30 is interposed between the outer or free ends of the hood and shoe and tends to hold the lip 15 in clamping engagement with the coacting edge or clamping member 29. The lower end of the spring 30 is held in position by projections or ears 3i which are struck up from the surface of the shoe l1 leaving a hole 32.

The shoe I1 is provided with a block or strip 33 of resilient material such as rubber, or the like. This block extends somewhat around the ends of the shoe and is held in engagement therewith by integrally formed buttons 3d and 35 which project up through the holes or openings in the top of the shoe and fit closely therein. The strip of abrasive material is supplied in the form of a roll which is inserted in the transverse opening and one end of the strip extends out between the clamping members 13 and 22 and then passes around the lower face of the resilient backing 33 and up through the opening 28 between the clamping members 15 and 29 asbest shown in Fig. 4. In order to do this, the free end of the hood is pressed downwardly as shown in Fig. 4 which causes the other end of the hood to swing up on the pivots 24 thereby moving the clamping edge 13 away from the flange 22 and leaving a sufiicient opening for passing the strip therethrough. The free end is readily inserted and drawn tight so that when the hood is released, the spring holds the strip in sanding position as shown in Figs. 2 and 3. This arrangement of the pivot or fulcrum at a substantial distance from the clamping edge l3 comprises one of the important improvements in the present invention as it permits the roll to be more readily inserted and the strip properly adjusted for use. After the roll is inserted, it is held against lateral movement by the cover discs 25 which are swung down as shown in Fig. 2. 1

Having thus described my invention, what I claim is:

1. An abrading device, consisting of an elongated frame member curved at one end and bent at a substantially right angle at the opposite end,

a combined hinge and clampin member secured to. the curved end and having an outwardly pro- J'ecting flange and also having inwardly projecting ears, a cover member pivotally connected to said ears and having a clamping edge opposed to said flange said pivotal connection being at a substantial distance from the clamping edge whereby the clamp may be readily opened a sufficient distance for the easy insertion and adjustment of the abrasive strip to be used in the device, said cover member having a clamping projection extending through an openin in the angularly turned end of the frame member and coaeting therewith to form a clamp, and a spring between the frame member and the cover member tending to hold the clamping devices in clamping positions.

2. In a device of the character set forth, the

combination of a channel-shaped frame mem-' ber having one end curved upwardly, a substantially semi-circular clampin member rigidily secured in the curved portion and providing a transverse jaw at the outer end, said clamping member also having inwardly extending cars, a handle member pivotally connected with said ears and having a transverse clamping edge adapted to coast with the first named clamping member, said handle member havin a transverse grooved portion at its free end extending through an opening in the free end of the frame member to form clamping means, a compression spring between the free ends of said members tending to press them apart, and a pad of resilient material mounted in the frame member and extending longitudinally thereof, the arrangement being such that the spring tends to hold both of the clamping members in closed position but may be compressed to open both of said clamping members whereby a roll of abrasive strip material may be inserted in the first named clamping member with it end extending out between the first named clamping members and around the pad and then brought into engagement with the clamp at the free end of said members whereby the strip will be clamped in two places when the spring returns to normal position.

WALTER P. PETERSON.

REFERENCES CITED The following references are file of this patent:

of record in the

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