US1511797A - Saw guard - Google Patents

Description

Fatente ct.

M, ia.

FRANK E. BEBGHOLD, OF ROCHESTER, NEW YORK.

SAW GUARD.

Application filed February 15, 1924. Serial No. 692,952.

To all whom it may concern Be it known that I, FRANK E. BERGHOLD, a citizen of the United States, residing at Rochester, in the county of 'Monroe and State of New York, have invented certain new and useful Improvements in Saw Guards; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming a part of this specification, and to the reference numerals marked thereon.

My present invention has for its object to provide an improved guard for circular saws or similar appliances which is simple in construction and adapted 'to protect the operator from contact with the saw under all circumstances, and consists in the improvements hereinafter described, the novel features being pointed out in the claims at the end of the specification.

In the accompanying drawing:

Figure l is a side elevation of a portion of a saw table showing the guard in position;

Figure 2 is a plan view of the same;

Figure 3 is aside elevation of a portion of the guard when in operation; t

Figure 4 is a sectional view on the line wm of Figure 1;

Figure 5 is a sectional view on the line 3/y of Figure 1, and

Figure 6 is a perspective view of one of the guard sections.

Similar reference numerals in the several views indicate the same parts. I

The saw table indicated by 1 is provided with the usual slot for the passage of the saw 2 or other similar cuttingtool, theedge of which projects above the table. 3 indicates a standard or supportsecured to the table in line with the saw cutting tool, and preferably of a width sufliciently narrow to pass freely throughthe kerf, as usual in devices of this description. Adjustably secured to the upper end of this standard 3 is a frame or support 4 on which the guard is mounted. In the present instance this frame or support is secured by bolts 5 and 6, the former being adjustable if desired in slots formed in the standard 3, and the bolt 6 passing through an arcuate slot formedin the standard so that the frame may be bodily tilted on the bolt 5 if desired to lift the guard from over the saw. The support l is preferably constructed of "a single piece of strap metal with its ends engaging the standard, and having the bars or arms proj ecting over the saw and separated somewhat as shown to provide a space between them.

The guard or saw shielding portion consists of a plurality of independent sections, three being shown in the present instance, indicated by 8, 9 and 10, and each composed of sheet metal having downwardly extending parallel wings a, and the upper connecting portion 6, and they are mounted upon the support 4 so as to be capable not onlyfof a tilting motion, but also of a bodily vertical movement thereon. The lower forward edges of the depending wingsof the guard sections are rounded as shown, and the forward end (i. e. that first engaged by the 'work) of each has a loose guiding and pivotal connection with the support formed, in the present instance by'the vertically extend ing slots 11 in the depending portions, for the reception of transversely extending pins and rlvets secured to the side bars of the support 4;. The pins or rivets while permitting free vertical movementserve to maintain the sections in proper position longitudinally of the supporting arm. The adjacent guard sections have their depending wings or sides arranged in different vertical planes and preferably alternately outside of and bethesection 9 is arranged between the side bars, and the section 10 is arranged similarly to section 8. The rivet or pin 12 operating in the slots 11 of the section 8 is secured rigidly to the forward end of support 4,

while the projections or rivets 13 upon which the guard plate 10 is guided, are separately secured to the-sides of the supports, as

shown particularly in Figure 4:.

The intermediate guard section 9 is mounted between the arms of the support and is supported at its rear end also by means of projections extending from op o site sides at its rear end, and adapted to rest on top of the support, and in the present instance these projections are formed by the ends of a pin 14 extending through both sides of the section and secured thereto by riveting or otherwise, as shown more particularly in Figure 5. The upper surfaces *of the guard section immediately over the supporting or pivot pins are cut away as shown, to prevent the sections interfering Wll3l1 each other Wh n raised. or tilted, bu

the apertures thus" formed are relativel small, and not only do not permit the outward passage of sawdust, but rather assist,

in causing it to be carried down throughthe slot in thetable by admitting air through itheseiopenings tot-he current-created by the rapid rotation of the saw, thus effectually preventing the-escape of the sawdust into 7 the. .air.

--'In operation, with'the sawirotating in the direction,indicated by the arrow, the ma- 7 v. terialto'he sawed, isepassed tothe saw under the. guard, the firstwsection' 9 ti t g on its "pivotpin, as; shown in dotted lines in Figure '1, and as, the materi l passes; under it, is

i moved bodily upwardfand after. passing :t is section thetel owing secti ns are lifted inza mila manner, first-til ing and then risingvert-ieally being guided by. the rivets V theposition shown in Figure l and the, lower" end of the wings drop in behind the board to, prevent theba ard mo ement o the board, if, by reason of a knot or 7 other ob,-

struction there Werea'ny tendencyto move back toward "the operator, the upper edge "ofrthis section-then engaging the forward edges of the wings of the second section, as

shown-tin said figure so that there is. no'da-n-' gerjof the operator being struck by material being thrownbackward. during the sawing peratio 1 Y f ."The. ,co s ue Q n'lsh $011M tvolbe ti 1 r1y= dvantageous, and y reasgn Of he factrthat the ec ensia mad fr m sheet metama r l a i y amp d n formedby. dies into the required shape, and

' the. rm that he'sec n a stant lly skilled operators niform, guards for a great variety of saws,

bemad ch p y and'as m led; y 11 Al houg -.1 pref r f r rea on of conomy and s rapli tytc e n; the loose P o l V neetionbetwe n the support and uard seeti ns by form ng lo s in e W ngs de P per iensnnd. he pins. n he sun n -t, other g ding c nnec ions tor prod ng a siml r snlt could. be employed:

- Ihave shown h reinQ hh ees ar sect ens, but ebrieus that-@- greater and b r nnld he empl yed if desired, theelative.arrangement-b ingmain ained,

claimassis -invention=:

g rdfeo pr s n a seat, an animate-sf: n en a eat dep nding sear-d sections loosely. mounted onthe supportand capable of independent vertical bodily movement thereon, and means for maintaining their relative position longitudinally of the support.

2. A saw guard comprising a support extending over the saw, a plurality of independent depending guard sections loosely mounted on the support and capable of independent vertical bodily movement thereon and guiding means between said support and the sections arranged at the forward ends of the latter. v

3. A saw guard comprising a suppor t,-a

plurality of independent guard sections loosely 'suspendedfrom'and permitted free bodily vertical movement thereon and loose guiding. and pivotal connections between the forward portions of the sections and the support.

4:; A saw guard comprising a support, a plurality of guard sections loosely' suspended from and permitted independent" free bodily vertical movement thereon, looselpivotal and guiding connections substantially as described, between one of the ends of each of the sections and the support permitting pivotal movement in any position of. vertical adjustment. 1

.5. A saw comprising a support, aplurality of independent guard sections loosely suspended from and permitted free and independent vertical bodily movement thereon, loose pivotal and guiding connections substantially as described between the guard sections and support permitting pivotal movement in anyposition of vertical adjustment, the ends of adjacent guard sections being arranged in different vertical planes to permit independent tilting movement on the pivots.

6. A saw guard comprising a support, a plurality of guard sections loosely support- "ed thereon, theedges of adjacent-sections being arranged out of line with each other, and loose pivotal connections substantially as described, between the sections and the supportfojr maintaining them in their relative positions longitudinally of the support, but permitting their independent vertical and tilting movements when engaged by the work.

a 7. A saw guard comprising a support embodying substantially parallel arms, a pin;

rality of independent guard sections having depending portions to cover the saw" and suspended loosely from the support, said sections being alternately arranged between and outside of the arms of the support.

8.-A saw guard comprising a supportembodyin'g snbstantiall arallel arms; a splurality of independent guard sections having depending portions to cover the saw, the adj-acent sections eX-tendin alternately outside of and between the'arms of the support and loose pivotal connections between; the C:- tions and the support preventing their movement longitudinally of the arms but permitting their independent vertical and tilting movement thereon.

9. A saw guard comprising a support embodying substantially parallel arms, independent guard sections having depending side portions to cover the saw and a connecting portion at the top, the adjacent sections being arranged with their depending portions alternately outside of and between the arms of the support and loose pivotal and guiding connections between one edge of each of the guard sections and the support to prevent movement longitudinally thereof.

10. A saw guard comprising a support embodying parallel arms, a plurality of guard sections having depending portions to cover the saw and connecting portions at the top,

the depending portions of adjacent sections being located alternately outside of and between the arms of the support, said depending portions having vertical slots at their forward edges and stationary guides on the support located in said slots.

11. A saw guard comprising a support having the parallel arms, a plurality of independent guard sections supported thereon composed of a single piece of sheet metal having the sides or depending portions provided with vertical slots and an upper connecting portion, the adjacent sections being located alternately outside of and between the arms of the support, and guide pins on the support engaging in said slots.

FRANK E. BERGHOLD.

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