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Publication numberUS2530867 A
Publication typeGrant
Publication dateNov 21, 1950
Filing dateMar 28, 1949
Priority dateMar 28, 1949
Publication numberUS 2530867 A, US 2530867A, US-A-2530867, US2530867 A, US2530867A
InventorsCharles Galanga
Original AssigneeCharles Galanga
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Spreaders for circular saw wood cutting machines
US 2530867 A
Abstract  available in
Images(1)
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Claims  available in
Description  (OCR text may contain errors)

Nov. 2l, 1959 l QIGALANGA 2,530,867`

sPREAnERs 4FCRn CIRCULAR sAw woon CUTTING MACHINES "fFiiImh 28, 1949 inw" . IN T a/f/ af @allg/[22a f l ca-)M Patented Nov. 21, 1950 sPREADEas ronomoULAn lsaw Woon CUTTING MACHINES Charles" Gaianga, Maspeth,l fY. Application Marel-1- 28, 1949, Serial- No.y8 3,85`8 `6 claims. (C1. 14s- 157) This invention relates to S'prjeader's for slitt'ed planks or the like. .a

Theobj'ect of the invention lis to' provide a spreader which may .be readily placed in operative position, and which is simple' in construction, and which efficiently" carries outits objective, and which, when not desired to be used', may be readily transposed to inoperative posi"- tion below the table top to 4enable the cutter to' be used' for' otherv purposesv thany slitting.

In the slitting of Wooden planks by Va circular saw, the slittedl portion has" a tendency to bite the saw and the friction causes the;s'1itt'ed` en'd to jump up often injuring the attendant. However, the improved spreader avoids this action of the' board or plank, and by exerting a spreading action in the Ycut slit at the ,same time facilitates the sawing action.

The invention comprises a member secured to the frame of the machine having a slotted portion, a crescent shaped spreader adapted to have its rear part engage said slot when in operative position, and having its front part adapted to engage the slit in the board or plank formed by the saw at a position adjacent the saw, a pivoting means for the spreader to enable the spreader to be swung from said operative position to its inoperative position out of the path of the board or plank, and a spring for exerting a holding pressure on the spreader when in said slot. More particularly, in the embodiment shown, the spreader is made with a sleeve surrounding a bolt secured to the frame of the machine, with said spring acting upon the sleeve, and with means for adjusting the spring, the bolt acting as a pivot for the movement of the spreader from its inoperative to operative position and vice versa.

The invention will be more fully described hereinafter, embodiments thereof shown in the drawings, and the invention will be finally pointed out in the claims.

In the accompanying drawings,

Fig. 1 is a perspective view of a known circular saw wood cutting machine, with the im- Similar characters' of reference indi-cate corresponding parts throughout the various views. Referring to the drawings', the known saw table |0 havingI standards or frame Hand a base i 2, shown without the usual and known 25ppurtenances', as driving wheels, etc., supports a circular saw |'5. I

To a part l s of the frame ll there is attached an angular supporting'rnember I'T secured by bolts I3. This member' il has a' plurality of parallel ridges I9 and |9a forming, a space or ,slot 2li. The outer ridge I9 isprefera'bly provided with an inclined surface |9a. The member H is close against the' frame as at 2|.

Spaced from the" ridges I9 is ya horizontal' b'o-lt 22 Aextending through an opening 23' of `a' verti cal part IBa' of the frame', andthe bolt 22 has a bolt head: '2q and' an adjustable mit 2,5 on the screwthreaded end 26` of the' bolt 22"'. ang lar spreader member 3|] has a sleeve 3| surrounding the bolt 22 with its inner portion 32 resting on the frame la (when in off position, Figs. 3 and 4), and with its outer portion 33 spaced from the bolt head 24. A spiral spring 35 is interposed between the bolt head '24 and this outer portion 33 of the sleeve 3|. The sleeve 3| is preferably formed by looping the end of the plate 36. The plate 35 is bent at right angles at 31, and then extends in partial crescent shape to form the spreader or slitter proper 38. The edge 39 is bevelled to facilitate its entrance in the slit in the Wood formed by the saw cutting.

The spreader or slitter proper 38 is placed in operative position (Figs. 2 and 5) by inserting it into the slot of the saWn wood or plank, whereby the part 36 is raised, and the sleeve 3| is raised accordingly away from the part Ita of the frame, and the spring 35 is subjected to compression, which presses the spreader proper 38 with considerable force into the slot 2|), so as to hold tightly in the slot 2U to prevent the spreader proper 38 from being disengaged therefrom by any tugging of the wood planks during the sawing action.

The bevelled portion |9a of the outer ridge I9 facilitates the entrance of the spreader proper 38 into the slot 2U. The spring 35 may be adjusted by the rotation of the bolt nut 25. The plank or I board 4l] of wood is shown in phantom fashion in .Fig 1, with the saw I5 cutting the slit 42, and

active position, as shown in Fig. 3. The spreader or slitter proper is then entirely concealed below the table I0 and is out of the way of the operator. In Fig. 1 is shown a part of the table top separated from the main portion of the table top I, which part is capable of being moved away from the main portion, all as well known. This enables the spreader or slitter to be turned down into operative position. In Fig. 1, the bolt 24 is below the table top l0 at all times being visible in Fig. 1, as also the member I'i, because of the absence of the top, and due to the perspective drawing.

I wish it to be understood that I do not desire to be limited to the exact details of construction shown and described, for obvious modifications will occur to a person skilled in the art.

I claim:

1. In a circular saw wood cutting machine, the combination of a member having a slot secured to the frame of the machine, a crescent shaped spreader having its back portion engaging said slot, and a spring for pressing said spreader into Said slot.

2. In a circular saw wood cutting machine, the combination of a member having a slot secured to the frame of the machine, a crescent shaped spreader having its back portion engaging said slot, a spring for pressing said spreader into said slot, a, pivot bolt for one end of said spreader and for supporting said spring secured to the frame of the machine, said spring permitting the spreader to be disengaged from the slot and swung intov` inoperative position around said bolt.

3. In a circular saw wood cutting machine, the combination of a member having a slot secured to the vframe of the machine, a crescent shaped spreader having its back portion engaging' said slot, a spring for pressing said spreader into said slot, a pivot bolt for one end of said spreader and for supporting said spring secured to the frame of the machine, said spring permitting the spreader to be disengaged from the slot and swung into inoperative position around said bolt, said spreader being bent into a sleeve surrounding said bolt.

4. In a circular saw wood cutting machine, the combination of a member having a slot secured to the frame of the machine, a crescent shaped spreader having its back portion engaging said slot, and a spring for pressing said spreader into said slot, said spreader having a part at right angles to the plane of the spreader, said part being bent to a sleeve shape.

5. In a circular saw wood cutting machine, the combination of a member having a slot secured to the frame of the machine, a crescent shaped spreader having its back portion engaging said slot, a spring for pressing said spreader into said slot, said spreader having a part at right angles to the plane of the spreader, said part being bent to a sleeve shape, and a bolt spaced from the slot the length of said part.

6. In a circular saw wood cutting machine, the combination of a member having a slot secured to the frame of the machine, a crescent shaped spreader having its back portion engaging said slot, a spring for pressing said spreader into said slot, said spreader having a part at right angles to the plane of the spreader, said part being bent to a sleeve shape, and a bolt spaced from the slot the length of said part, said spring acting on said sleeve and means on the bolt for adusting the spring.

CHARLES GALANGA.

No references cited.

Non-Patent Citations
Reference
1 *None
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2675033 *Sep 20, 1950Apr 13, 1954Duro Metal Products CoMounting means for rip fences for table saws
US3232326 *Oct 4, 1962Feb 1, 1966Rockwell Mfg CoBlade guard and splitter assembly for table saws
US6170370Jul 6, 1999Jan 9, 2001Sommerville Design & Manufacturing Inc.Circular saw splitter device with integral anti-kick back
US6715388 *Sep 28, 2002Apr 6, 2004Jerome Francis JakshaAdjustable splitter and anti-kickback device for power saws
US7234380 *Jan 23, 2004Jun 26, 2007Black & Decker Inc.Side pressure splitter
US7437981Nov 21, 2005Oct 21, 2008Robert Bosch GmbhModular guard system and apparatus for a power saw
US7600456Nov 29, 2006Oct 13, 2009Robert Bosch GmbhModular guard system for a power saw
US7806032Aug 8, 2007Oct 5, 2010Robert Bosch GmbhTable saw guard system side barrier
US7814818Aug 8, 2007Oct 19, 2010Robert Bosch GmbhModular table saw guarding system riving knife release mechanisms
US8082826Mar 25, 2008Dec 27, 2011Power Tool InstituteSaw accessories and clamp for use therewith
US8091456Mar 25, 2008Jan 10, 2012Power Tool InstituteSafety devices for saws
US8096220Aug 8, 2007Jan 17, 2012Robert Bosch GmbhModular table saw guarding system upper guard barrier
US8127648Jul 31, 2008Mar 6, 2012Robert Bosch GmbhTable saw guard system
US8151676 *Jun 5, 2008Apr 10, 2012Makita CorporationStructures for supporting splitters of cutting tools
US20120055302 *Mar 30, 2010Mar 8, 2012Makita CorporationStructure for preventing removal of fixing tool for splitter in cutting machine
EP0012404A1 *Dec 10, 1979Jun 25, 1980Karl M. Reich, Maschinenfabrik GmbHCircular saw with riving knive
EP1787777A2 *Nov 15, 2006May 23, 2007Robert Bosch GmbhA modular guard system and apparatus for a power saw
EP1990155A2 *Nov 15, 2006Nov 12, 2008Robert Bosch GmbHA modular guard system and apparatus for a power saw
EP2767358A1 *Feb 3, 2014Aug 20, 2014Wolfcraft GmbHSaw table plate with riving knife that can be attached to same
Classifications
U.S. Classification83/102.1
International ClassificationB27G19/00, B27G19/08
Cooperative ClassificationB27G19/08
European ClassificationB27G19/08