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Publication numberUS1379802 A
Publication typeGrant
Publication dateMay 31, 1921
Filing dateOct 1, 1917
Priority dateOct 1, 1917
Publication numberUS 1379802 A, US 1379802A, US-A-1379802, US1379802 A, US1379802A
InventorsCooper Hamilton A
Original AssigneeCharles A Briggs
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Saw-guard
US 1379802 A
Abstract  available in
Images(2)
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Claims  available in
Description  (OCR text may contain errors)

H'. A. COOPER. SAW GUARD.

APPLICATION FILED OCT. I. i917.v

SHEETS-'SHEET l.

H. A. COOPER.

SAW GUARD. APPLICATION FILED o T. 1. 1911.

Patented May 3 1, 1921.

Z'SHEET/S-SHEET 2.

Gte/mung STATES PATENT HAMILTON A. COOPER, or TOLEDO, OHIO, AssIeNOE 0E ONE-HALE BRIGGS, OE TOLEDO, OHIO.

To all whom t may concern.'

Be it known that I, HAMILTON A. COOPER, a citizen of the UnitedStates, residing at f Toledo, in the county of Lucas and State of Ohio, have invented certain new and useful Improvements in Saw-Guards, of which I declare the following to be a full, clear, and exact description.

This invention relates to improvements in saw guards and particularly to improvements in safety devices or guards for use in connection with circular, rip or cross-cut saws.

The principal object of this invention is to provide an improved saw guard which is entirely automatic in its action and renders it practically impossible for an operator tov accidentally cut his fingers on the saw. l

A further object of this invention is the provision of a saw guard having a hood and a guard member pivotally mounted on the hood on either side thereof, the hood and guard members4 being so connected that when one of the guard members is lifted to elevated position, kthe hood will be lifted with it, while the other guard member may remain in its lowermost position. The purpose of this arrangement is to properly protect the, operator when the saW table is swungto an angle with the horizontal about an axis parallel with the plane of the saw. In the ordinary construction, there is but one guard, or else a vpair of guards rigidly connected, and hence when the table' is tilted as above stated, the guard on the side of the saw toward the upwardly extending portion of the table is raised, carrying with it the hood and leaving a portion of the saw exposed so that the fingers ofthe operator may come in contact with it when they approach from the frontor the lower side of the table. It is an object of my invention to provide a structure which will overcome this danger.

' A further object of my invention is to provide a saw guard so constructed and so operating as to prevent the operator bringing his fingers incontact with the cutting edge of 'the saw while feeding lumber thereto. Y

Further objects, and objects relating to 'economies' of manufacture and details of construction, will definitely appear from the detailed description to follow I accomplish the objects of my invention pended claims.

Yoperation of the saw at all times.

T0 CHARLES A.

' ...L SAW-GUARD.

Specification of Letters Patent. Patented May 31, 1921' Application filed October 1,: 1917. Serial No.y 194,179.

by the devices and means described in the following specification. My invention is clearly defined and pointed out in the ap- A structure constituting a preferred embodiment of my invention is illustrated in ,the accompanying drawings, forming a part vof this specliication, in which:

Figure I is a view in side elevation of `a v guard constructed in accordance with my invention.

Fig. II isa top plan viewof the guard wlth .the spreader plate shown in section on the line II-II of Fig. I.

Fig. III is a detail, sectional view, taken on the line III-III of Fig. I.

Fig.. IV is a detail, sectional view, taken on the line IV-IV of Fig. II.

Fig. Vis a detail, sectional view, taken on the line V-1-V of Fig. I.

Fig. VI is a detail, sectional view, taken v i on the line VI--VI of Fig. II.

Fig. VII isa view in side elevation of a modified form of my invention.

Fig. VIII is a top plan view of the forward -portion of the guard illustrated in Fig. VII.

Fig. IX is a detail, sectional view, taken on the line IX--IX of Fig. VIII.

In, the drawings, Ysimilar reference numerals refer to similar parts throughout the several views and the sectional views are taken looking inthe direction of the little arrows atthe ends of the section lines.

Considering the` numbered parts of the drawing, I have shown a saw table 10 provided-with a ,spreader plate 11, having a vertically lextending, slot 12 therein. IWy guard includes a hoodwhich covers the sides and top of the saw at all, times and comprises the parallel sidewalls 13, provided with a plurality of openings 14 therein so that the side walls of the hood are of` skeleton construction .and afford a view of the The upper edges of said side walls 13 are connected by the semicircular top wall 15 which forms the top ofthe hood. A pair of parallel tail members 16 extend rearwardly from the hood, as shown in F igs'. lI and II, and carry a bolt 17 extendingthrough the slot 12, a roller 18 being journaled on the bolt 17 and engaging the sides of the slot 12, as clearly appears from Figs. IV and V. A

bolt .19 :is carried by the extreme rear ends of the tail members 16 and carries a roller 20, which is adapted to engage the rear edge of the spreader plate 11 to limit the pivotal movement of the hood in one direction. rlhe tail members 1G are provided with upwardly extending shoulders 21, which carry ,a pin 22 having a roller 23 journaled thereon and adapted to engage the forward edge of the spreader plate 11 to limit the pivotal movement of the hood in the other direction. A dog` 2/1 isV pivoted at 25 to the tail members 16 and provided with a serrated end 26 which is adapted to engage the lumber passing to the saw so as tov prevent any back-kick thereof.

A pair of parallel guard members 27 are provided, each having a forwardly and up wardly extending arm 23, which extends at substantially 4:50 t0 the plane of the saw table, and a vertically extending arm 29 having a slot 30 therein, said arm 28 and arm 29 being interconnected by bracing members so as to make one integral member which is connected to the forward end of the link 31 extending rearwardly and downwardly and pivotally connected at 32 to the hood at a point near the bolt 17. Shoulders 33 extend forwardly from the forward edge of the side walls 13 of the hood and bolts 34: pass through each of these shoulders 33 and through the slot 30 of the arm 29 of the adjacent guard member, s0 that each guard member is independently pivotally mount- Yed on the hood with the result that, if said guard member is lifted, the hood will be lifted with it, but, if the hood is lifted, it can be moved upwardly independently of the guard members.

The embodiment of my invention, shown in Figs. VH tOIX, is quite similar to that shown in the preceding views with the exception that the parallel guard members are connected together by the cross bars 35, 36 and 37, so that said parallel guard members move together instead of independently. as in the preferred form of my invention. rEhe guard. instead of being connected to the hood by bolts passing through the slots 30, is so disposed that the forwardly projecting lugs 39 extending from the forward edges 38 of the walls 13 of the hood engage the crossbars 36 and 37 connecting the parallel side members of the guard, soas t0 limit the movement of the guard and hood relative to each other.

From the description of the parts given above, the operation of this device should be very readily understood. The operator, in feeding a piece of wood to the saw, moves it under the inclined arms 28 of the guard. and the forward movement of the piece of wood lifts the guard members 27. as well as the hood proper, since the bolts 34, carried by the lugs 33 extending from the forward edges of the side walls 1,3 Of the llOQd? normally engage the bottoms of the slots 30 in the vertical arms 29 of the guard. It will therefore be seen that the forward movement of the piece of wood, which is being fed to the saw, will lift the guard and the hood so as to expose the cutting edge of the saw so that the wood may be fed to it. As soon as the piece of wood has moved forward suf- AF.ciently s@ that it'does not engage the bottom of the guard, the guard will drop to its normal position, while the hood will be held in an elevated position by the work going through the saw due to the engagement of the piece of wood with the lower edge of the hood. rlfhis position is illustrated in dotted lines in Fig. l. After the cut has been completed, the pieces passing from the saw pass on each side of the spreader plate 11 and the manner in which the tail members 16 of the hood are mounted by the bolt 17 passing through the slot 12, permits tho tail of the hood to lift so as to allow the pieces of wood to pass out thereunder. rllhis elevated position of the hood is shown in dotted lines in Fig. VH. The tilting of the hood in one direction is limited by the bolt 19, having a roller or washer 20 thereon, which engages the rear edge of the spreader plate 11, while the rocking movement in the opposite direction is limited by the bolt 22 having the washer or roller 23 thereon, which engages the forward edge of the spreader plate 11.

ln the form of my invention shown in Figs. l and H, the guard members 27 are independently mounted on opposite sides of the hood, being' pivotally supported by the links 31 which are pivotally connected with the hood by means of theA bolts 32.

Fach of these guard members can move indepcndently of thc other so that, if the piece of'wood engages but one of these guard members, it will be lifted andv at thc same' time will lift the hood. while the other guard member will remain in its normal position,

preventing the fingers of the operator passing into contact with the saw along the end of the piece of wood being fed into the machine.

ln the form of my invention., shown in Figs, Vll. VH1 and 1X, the guard is of one piece, the members 27. which are pivotally connected by the links 31 with the hood. being interconnected by the cross-bars 36 and 37 g so that they move as one piece. lnstead of the pin and slot connections between the hood and guard. lugs 39 are provided extending forwardly from the front edges 33 of the side walls 13 of the hood, said lugs being disposed and positioned to abut the cross-bars 36 and 37 so as to limit the movement of the hood and guard relative to each other. `When the guard is lifted by the feeding of a piece of wood to the saw, the engagement Ot the bar 36 with. the lugs 39 0a the hood causes the hood to be lifted too, while the upward movement of the hood relative to the guard is limited by the engagement of these lugs 39 with the crossbar 37.

It will be observed that I have provided a guard which not only protects thesides and top of the saw so that the operator cannot accidentally come in contact with it, but, at the same time, prevents his feeding his lingers to the saw along with the wood, inasmuch as when the wood has been fed so far toward the saw that it no longer engages the bottom of the guard 27, said guard will drop on the lingers of the operator and warn him that it is time to get his fingers out of the way. The dropping of this guard does not, in any way, interfere with the operation of the saw, or the feeding of work thereto and it automatically warns the operator when his lingers have gone too far and serves to prevent his getting his fingers in a position where they would be injured by the saw.

I am aware that the particular embodiment of my invention, which I have here shown and described, is susceptible of considerable variation without departing from the spirit thereof and therefore, I desire to claim my invention broadly, as well as specifically, as indicated by the appended claims.

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

l. A device of the class described, comprising the combination of a saw table; a saw; a hood adapted to partially embrace said saw; a pair of independent guardmembers adjacent the forward end of said hood one on each side thereof; links connected to said guard members and pivotally connected to said hood near the rear end thereof; and means for limiting the movement of said guard members relative to said hood.

2. A device of the class described, comprising the combination of a saw table; a saw; a hood adapted to partially embrace said saw and bodily movable relative thereto; links independently pivoted to said hood adjacent the rear end thereof and extending upwardly and forwardly; guard members one on eachL side of said hood secured to the forward ends of said links; and stops carried by said hood and coperating with said guard members to limit their movement relative to said hood.

3. A device of the class described, comprising the combination of a saw table; a saw; a hood adapted to partially embrace said saw and bodily movable relative thereto ;y links pivotally connected to said hood, adjacent the rear end thereof; a guard member secured t9 the forward and of each of said links, said guard members being arranged on opposite sides of said hood; and means for limiting the movement of said guard members relative to said hood, each of said guard members being mounted and movable independently of the other.

4. A device of the class described, comprising the combination of a saw table; a

slot, said vertically extending arms being arranged on opposite sides of said hood; and a stop carried by said hood and disposed in each of said slots.

5. In a device of the class described, the combination of a saw table, a saw, a hood arranged to partially embrace said saw and movable bodily relative thereto, and guide members on either side of the hood pivotally connected thereto near the rear end thereof and independently movable relative thereto in one direction.

6. In a device of the class described,the combination of a saw table, a saw, a hood adapted to partially embrace said saw and movable relative thereto, independent guard members on either side of the hood pivotally connected thereto near the rear end thereof, and stops carried by said hood and engageable lby said guards to effect movement of the hood upon `movement of eitherV of the guards in one direction. y

In a device of the class described', the combination of a saw table, a saw, a bodily movable hood having its front and rear end portions normally partially embracing said saw, a pair of guard members projecting forwardly on either side of said hood and pivotally attached independently to the hood near the rear end thereof, and stops carried by the hood and adapted to engage the guards to insure a corresponding movement of the hood upon movement of one ofthe gua-rds in one direction.

8. In a device of the class described, the combination of a saw table, a saw a hood adapted to partially embrace said saw, an independently movable guard member pivoted to the rear end of the hood on each side thereof and having portions projecting forwardly thereof, and stops carried by the hood and engageable with portions ofthe guard members to insure movement of the hood upon movement of either guard member in one direction.

In, testimony whereof I aliiX my signature.

' HAMILTON A, COOPER,

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US8082826Mar 25, 2008Dec 27, 2011Power Tool InstituteSaw accessories and clamp for use therewith
US8091456Mar 25, 2008Jan 10, 2012Power Tool InstituteSafety devices for saws
Classifications
U.S. Classification83/860
International ClassificationB27G19/00, B27G19/02
Cooperative ClassificationB27G19/02
European ClassificationB27G19/02