US1094710A - Saw-guard. - Google Patents

Saw-guard. Download PDF

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Publication number
US1094710A
US1094710A US1912712973A US1094710A US 1094710 A US1094710 A US 1094710A US 1912712973 A US1912712973 A US 1912712973A US 1094710 A US1094710 A US 1094710A
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Patent type
Prior art keywords
saw
guard
bench
extremity
board
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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Inventor
Andrew Flohr
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Andrew Flohr
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23DPLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D47/00Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts
    • B23D47/02Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts of frames; of guiding arrangements for work-table or saw-carrier
    • B23D47/025Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts of frames; of guiding arrangements for work-table or saw-carrier of tables
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/768Rotatable disc tool pair or tool and carrier
    • Y10T83/7684With means to support work relative to tool[s]
    • Y10T83/773Work-support includes passageway for tool [e.g., slotted table]
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/768Rotatable disc tool pair or tool and carrier
    • Y10T83/7734With guard for tool

Description

A. PLOHR.

SAW GUARD.

APPLIQM'IUN FILED AUG. 2, 1312,

1,094,71 O. Patent-ed Ap128, 1914.

unimib-STATES PATENT onirica.

, ANDREW-@Louxor comme SPRINGS, coLoRADo.

To all ilzmh/z't-may concern:

Beitknown that I, ANmtew Florin, a citizen of the United Colorado Springs, county of El Paso, and State of Colorado, have invented certain new and use. il Improvements in Saw- Guards; and I do declare the following to be, a full. clear, and exact description of the invention, such as will enable others skilled in the art to which itappertains to make and use the same'7 reference being had to the accompanying drawings, and to the characters of rete-rence marked thereon, which forni a part of this specification,

My invention relates to improvements ifi guards for saws, o f 'the circular, or buzz,

type. l'lei'etofore, sofar as I am aware, thev portion of a sawnof this character which extends above the table or bench is so exposcd as to make it exceedingly dangerous for workmen and others in the immediate vicinity ofthe Saw. x

My obj'cctis to provide' a'safetydevtice,

guard, which shallcover the saw.inlsi'iclifa manner that when not in use' there can be no possible danger of accident, the said' `guard also 'serving tol protecttlie Workman'A whilc'using the saw. v To this end I mount upon the bench containing the slot through which the segment of the sawrprotrudes, a .stationary frame, one bar' of which is in vertical alinementwith the saw bladeQand (xet-.iipies a position above the same while the other bar, though connected with the.

first-named bar and forming a support therefor, is, outwardly and laterally inclin'ed, its outer extremity being connected with an upright member applied to' the bench. A pair of dogs, or pointed members, is supported upon this frame and .adapted to engage the piece ofjtim'b'er during the sawing operation, the said dogsbeing arranged 'to allow the board to travel forwardly to keep pace' with the. cutting`action of the saw, but adapted lto prevent its`return movement, thusiiiaking it, impossible for'thesaw to drive the board 'in the rearward direction, as sometiincshappcns with serious results.

Pivotallv mounted upon the stationary frame is thc guard proper, which occupies' a position upon the opposite side of the saw. from the aforesaid dogs, the plane of Athe saw being between the guard and the dogs. This guard is constructed to move `specification f Letter: raten. apaucanm sied August 2', iiz. sci-iai no. 712,913.

States, residing atY .-spoiise to the forward Patented Apr. 28, 1914.

upwardly as the board, or plank to be sawed, is moved into position, the forward end of the guardbeing upwardly and rearwardly` inclined Yfor the purpose` The guard rests upon the board, or piece of timber, during the 'sawing operation, and as soon as the work is completed and the board is out of the way, the guard drops into eii-' .gagement with the top of the bench and acts as a shield for the purpose heretofore outlined,

`In. order that. the weight of the guard max iiot interfere in any way with its oper- 'a'tion it is counterbalanced so that only slight upward pressure on its free end is necessary-in order to cause it to rise in repressure of the part to besa wed. This counterbalancing device consists of a flexible member, as a chain, rope,rv or cable, connected with the guard -at one extremity, while its opposite'extremity is" connected with a weight, the chain engaging a'supporting pulley intermediate its extremities.

n; ,Inforder to prevent the guard from being fthrown out of position, either accidentally or by design, one of the bars of the stationary frame" is bent at its rear extremity out of its normal plane and into the pat-h of the lower edge vof the rear of the guard, thus limiting the upward movement of the` guard and preventing the' latter from being turned on its pivotoutof'its guarding, or shielding, position.

Havin brietiyV outlined my improved construction, I will proceed to 4describe the same 'iii detail, reference being made to the accompanying drawing, in which is illus-V trated an embodiment thereof.

In this drawing: Figure l is a side elevation of my improved guard, shown in connection with a saw, the bench of the latter being shown in section on the line 1 1, Fig. 2. Fig. 2 is "a top plan view of the same.

FigV 3 is a cross section taken on the line 3-3; 'Fig 4 is a cross`section taken on the line 4 4, Fig. 2, looltingtoward the left, or in the directionof the arrow.

The same reference characters indicate the same parts in all the,views.

`Let the numeral 5 designate a bench, or table; upon which the saw 6 is mounted. the top of the table having the usual slot 7 in the plane of the saw, and through whicu the latter protrxides, 'a *segment-i. of the saw extending Vabove the top of the vbench to orresporrdwith the -required exposure for Y' the thickness of the board orplank 8 to be lio 'I thereon. Y l Mounted above .the saw, and in the plane- Y sawed vIt willbeundestood thatI the Vtopof. the .bench is vertically ladjustable byl any suitable'means to regulate thearea of the segment, ofthe saw which shall be exposed-abovethe'top of the bench. As shown 1n Ithe drawing, this' is accomplished by Ameans of "'vertically arranged screws 10 threadedin nuts A12 mounted on thest-ationary part Aof the bench, the'upperextremities i' ofthe screwsgengaging the top of the table by a bar 15 having a portion 16 arranged,

parallel4 with the bar 13 and spaced there l, from', as shownat 17, two dogs 18'bei'ng con- .nected with the bars, their upper extremlties being :located'in the slot 7 and support! ed by means ofipivot pins 19. These'dogs are arranged to swing freely in a plane at one side of the saw, but in close proximity thereto. From the `forward extremity 20'l of the part 1G of the bar 15, the latt'er has a part21 which extends outwardly and for wardly, its outer'extremity being bent to occupy n position parallel with the edge of y thetop of the bench, `as shownat 22, this part being secured by fastening devicesQ- to the upper extremity. of an uprightpost- 24, the latter being secured to one edge of -the top of the bench by meansof fastening devices 25.

The part 21 of the bar 15 ex-A tends across and above the space which is occupied by the portion of the board on t e right-hand side of the ysaw during the'sawing operation, the term right-hand side being used with reference to the position of -the operator standing at the rear of the bench and moving theboardforwardly to keep -paee with the cut of the saw. 'Ihe rear extremity of the bar 13 iS'bent-inwardly-toward the plane 0f the saw as shown at 2G inorder to bring it into the path of 'a part of the guard, as .heretofore more fully explained; A

The guard proper Aconsists of a bar 27 `pivotally connected at itsforward extremity with the corresponding end of the station- 'ary bar 13 by means o? a bolt or other suitable fastening device 28, a spacingsleeve A.29 being interposed between the bars 13 'and 97 in order mthrow the .pivoted 'barv wel] beyond the plane Vof thesaw andleave a clear operating space for Athev latter.` To

the rear extremity of the bar 27 is secured 'is vthrust av triangulanmember 3() whichv consists' of l two parts 31 and 32 connected at the bottom as shown 'at-33, the art-33 closing the space at the bottom of tie member between the 2 parts 31 and 32vand also connecting ter, the' said member consisting of :an mtegral' piece of material," The rear endi of the bar-'27 passes between the two partsV 31l and 32 of the4 member 30`and'is bent slightly downwardly to c orrespondwith the .'75

shape of thenp'per part of the member 30, the bar bein secured to the 'member 30 by fastening e of this triangular member is upwardly in clined from thefforward and "lowermost 80 point`36 of the saidmember which normally rests-upon the top of the bench. This up; wardly inclined edge 37 extends to a p oint 38 of the triangular member, which is sufficiently raised from vthe top of the bench to g5 permit the introduction of one end of the board, or lank,` 8, or vother piece of timber to be acted) on by the saw, and by virtue o f-.f-- the pivoted or inclined edge 37'of the mem-l ber 30, the

forwardly toward the'. saw, Vthe guard in this event being supportedby the' board Band resting thereon during the saw` ing operation. A plate 39 forming a part ofthe guardia 95 piyotally connected `as shown atOwiththe` bolt or pivot pin 28, and occupies a position atoneside of the bar 27,thesaid plate 1 bein arranged to partly' conceal thesaw 'Y l `on t 1e lefthand.side of the user when'thelo saw isnot in use. This plate 39, maybe.

of any suitable size. As illustrated-in the drawing, it is narrowest at its-forward, or pivot, extremlity, and increases in-widthas it extends rearwardly, Vitsreankextrein- 1 05 ity being approximatelyof the same Width'j as the forward extremity of the member 30V The forward extremity of this plate passes between the two parts 31 and loffthe tri-` f angularmcmber 30, and the lower rear,A cor- ."11'0 'ner otheplate normally rests upon the bottom or closed part 330i the member 30 whereby theplate 39 I iormally'moveswith. the bar'27 and t-he member 30 of they uard? Thisplate 39,' however, is indepen ently 15.' A' movable, (see the .dotted lines in Figlgh for the purposeof'exposng the saw on the left-hand side in order to measure the ment extendin above the top of the-table during the ad]ustment of such. top to'ior- 120 respondjrwiththe thickness of the board' or other member -to'be"acted Gaby-the' saw. Y The bar27 is provided, on its upper edge,.

near itsrear extremity, with -a"per'forated lug 41 with which one extremityof a chain 1215V 42, or other llexible device, is connected, the-4' said chain. passing overa pulley 43 and havin a counter-balance weight fileonnectdx ed wit its'fopp'osite extremity.=. This weight is of such mass as tov partly ovecomethe the latvices 3 5. The lowerppoijtion .i

duard will be raised as the board 9o weight of tho guard, but it is also so regir lated that the guard will resume itsy normal position -in engagement with the top of the table as soon as the board, or other article to he sawed,v.is removed from the bench. rl'he weight 44 is sectionahand may be regulated as desired.

'lhe two Adogs 18 extend downwardly l.noni/ly to the top of the table when the saw is not infuse, alidtheir lower extremities. are made sharp to prevent the rearward. movement of the board -at'ter it` has oifce been brought into engagement with the saw. 'lliese dogs Vvswing forwardly freely in-response to the ,forward movement of the board, and occupy a forwardly inclined position with their sharp ends in contact with the board, but oti'ering no resistance to its forward movement.V However, these dogs will prevent 'the rearward movement of the board', since their sharp extroi'nities will indent'tlie latter and lock it against accidental rearward travel,`

From the foregoing description, the use and operation of my ,improved saw-guard will be readily understood. The top of the table or bench, is equipped with an adjusta le gage-plate 45, which occupies anY edge-wise position upon the bench, and is laterally adjustableby means of a slottedarm 4G and a-setbolt A47, in the usual manner. Assuming that this Vgage is adjustedy to engage one edge of the board 8, :the machine is ready for use; Assuming that the rear extremity of the guard, at the point 36, is resting upon the top of the table, the forward end .of the-"board is thrustv against the beveled edge 37 of the member 30, and as the board is .moved forwardly its action on such edge imparts a corresponding lifting movement to the guard, which rises until it rests upon the upper surface lof the hoard.- As the board is'inoved forwardly into engagement Awith the sawgthe latter performs its function *.inthe usual' manner, the guard maintaining its position `on topfof the hoard and engaging the latter lightlyin consequence of thev action of tl 1e counter balance weight 44, thus preventing `the4 guard from marring o r marking. the .board to be sawed in case the upper surfaceof the -iatter is smooth or polished. It vwill be unlerstood, however, that v the` ;`,part 'of the guard which rests `upon thee'board atjth'e point 36 will be made perfectlysmoo'th`,`and as this part is of appreciable width, (see Athe partv33 in Fig. 4,) there will benojendency to markv or mar the board upon 'which the guard rests.l After the boa-rd has been moved over thq; bench and .cut in two by the saw, the guard automatically will resume its normal position as soon as the part of the board which it engaged is out of the way. When it is desired to regulate the top of the fable to vary the protruding seg.

ment of the saw 6. the guard member 39 may-be raised independently of the body of the guard, as hcrctoforeexplained.

It. must be' understood tliatmy improved guard isiequal'lyv applicable for the protection of saws for cutting metal as for theprotection of wood-cutting saws.

Having thus described niy invention, what -I claim is: l

l. In a saw-guard, the combination with u bench and saw, of a support mounted on the bench and having a stationary bar extending above the saw and lnkthe plane of the latter, and a guard pivotally connected with the support at one extremity and ar-y ranged beyond the plane of the saw but in close proximity thereto, the free extremity of the Aguard being open while the c orresponding extremity of the stationary bar projects thereinto and forms a stop to limit the movement of the guard upon its pivot.

2. In asaw-guard, the combination with eluding a. stationary bar extending above the saw and in the plane thereof, and a .ceivef the corresponding extremity of the stationary member, the hollow portion of the guard being closed at its lower edge to enga e the extremity of the stationary bar whic i forms a 'stop to limit the upward movement of the guard .farther than is necesa bench and saw, of a support mounted on the bench iu the plane of the saw and in- Y sary' for operating purposes, substantially' as described.

3. The combination with abench and saw of a stationary member extending upwardly from the bench in the plane of the sawv and located forward of the same, the said member having a b'ar extending rearwa -dly above the saw and in the plane of the latter, and a ard pivotally connected-with the forwarc extren'iityof the bar and arranged parallel with the latter beyond the plane o f the saw, in closeproximity thereto, the said guard having a hollow part at its free extremity arranged to receive the correspond-` ing extremity of the stationary barwhich is arranged to limit the upward movement of the mally resting on the bench andhaving a beveled surface extending upwardly Vfrom the bench, the pivoted guard also including 4. The combination with a bench and saw of a stationary bar arranged above the saw and 1n the. plane of the. latter, a guard pivotguard by. engaging the hollo'wexf` tr'emity of the latter,`thesaid extremity nor- 12o Vstationary bar, the pvotd guaid ally' connectxedY at ne xtremtjdnd decupymga' plane, on the opposite. sid 'of the. free extremity of the.

oessed to lreceive` the being for Qpeiat'gng purposes,"-khe guard being a1o equipped with a plateA hornxally Inovpingvm unison with the bndyfnthd guard, but. adapted bo move, indegen p sta-ntrally' as described. ,Y

v In testimon whergfgkxx my signature Alpmann, d HENBYIFLOHKQ Y Y ANDREW

US1094710A 1912-08-02 1912-08-02 Saw-guard. Expired - Lifetime US1094710A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3760715A (en) * 1971-12-20 1973-09-25 J Grote Machine for slicing sausage and applying the slices to pizza in a predetermined pattern
US4294151A (en) * 1979-11-23 1981-10-13 Julian Lemus Anti-kick back device
US4721023A (en) * 1986-06-20 1988-01-26 Shopsmith, Inc. Saw guard system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3760715A (en) * 1971-12-20 1973-09-25 J Grote Machine for slicing sausage and applying the slices to pizza in a predetermined pattern
US4294151A (en) * 1979-11-23 1981-10-13 Julian Lemus Anti-kick back device
US4721023A (en) * 1986-06-20 1988-01-26 Shopsmith, Inc. Saw guard system

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