US1240430A - Cutter-guard. - Google Patents

Description

- P. ERICKSON.

' CUTT ER GUARD.

APPLICATION FILED JULY22. I916.

Patented Sept. 18, 1917'.

2 SHEETSSHEET1 I N VEN TOR.

A TTORNEYS.

P. ERICKSON.

CUTTER GUARD.

APPLICATION FlLED IULYZZ. I916.

Patented Sept. 18, 1917.

2 SHEETS$HEET 2.

' INVENTOR. Isl/Wm A TTORNEYS.

PETER ERICKSON, OF CHICAGO, ILLINOIS.

CUTTER-GUARD.

Specification of Letters Patent.

Patented Sept. 18, 1917.

Application filed July 22, 1916. Seria1N0. 110,678.

To all whom it may concern:

Be it known that 1, PETER ERIGKSON, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented new and useful Improvements in Gutter-Guards, of which the following is a specification.

This invention relates to guards for saws and other wood-working machines to prevent injury to the operator from contact with the saw or other cutting tool.

The invention has for its object to provide a simple and efiicient guard device having a wide range of adjustment, and which can be easily swung into and out of operative position.

\Vith the object stated in view, the invention consists in a novel combination and arrangement of parts to be hereinafter described and claimed, and in order that the same may be better understood, reference is had to the accompanying drawings forming a part of this specification.

In the drawings,

Figure 1 is an elevation of the device showing its application, and

Fig. 2 is a plan view thereof;

Fig. 3 is an enlarged side elevation of a portion of the device, partly in section, and

Fig. 4 is a front elevation thereof;

Fig. 5 is a side elevation of the guard;

Fig. 6 is an enlarged cross section on theline 66 of Fig. 5;

Fi 7 line 7-7 of Fig. 1;

Fig. 8 is a perspective view showing a modified form of guard, and

Fig. 9 is a cross section on the line 99 of Fig. 8.

Referring specifically to the drawings, 10 denotes the top of the table of a wood-working machine, such as a sawing machine, shaper, or the like. The tool in the present instance is asaw 60. The table has a de pending apron 11 on which the device which is the subject matter of the present application for patent is mounted.

On the apron 11 is mounted a wide bracket having abase plate 13 which is secured to the apron bybolts 14 or other suitable means. The bracket also has a medial web 12, avertical plate 15 parallel to and spaced from thebase plate 13, ahorizontal top plate 16 and a similar butlarger bottom plate 17, said top and bottom plates being is an enlarged cross section on the spaced and formed withvertical bearings 19 and 20, respectively, in which is mounted anupright shaft 18. On theshaft 18, between the upper bearing 19 and theplate 17, is fitted a sleeve 21 reinforced by a top rib 22, said sleeve being split lengthwise and extended to form two outstanding vertical plates orflanges 23 and 24 arranged side by side in laterally spaced relation. ably mounted a plate 25, which latter, at the end of its inward stroke, is adapted to seat, similar to a key, in a longitudinal groove 26 in theshaft 18, the movement of the'plate being lateral, or toward and from the shaft. When the key-plate 25 is thus advanced, the sleeve '21 and itsplates 23 and 24 are locked to theshaft 18, and when the key-plate is backed out of the shaft groove, the shaft and the sleeve are uncoupled and the shaft is free to turn in the sleeve. Ver tical sliding movement of the sleeve on the shaft is prevented by thebearing 19 and theplate 17 between which the sleeve is positioned. Theplates 23, 24 and 25 have alined apertures to take atransverse bolt 27, theplates 23 and 24 havingoutward reinforcements 28 and 29 to provide a bearing for the bolt, and the reinforcement 28 is tapped to take the threaded end of the bolt shank. The bolt head has an actuatinglever 30 for turning the same to draw the plates together. The plate 25 also has ahorizontal slot 31 through which passes ashort pin 32 the ends of which are fixed in theplates 23 and 24. This slot and pin limit the sliding movement of the plate 25 hereinbefore described. The aperture in the plate 25 for thebolt 27 is elongated sufiiciently to allow the plate to be slid as described.

. To operate the key, plate 25, alever 33 is provided, the upper end of which serves as a handle, and thejlower end as a fulcrum, the same seating in anotch 36 made in the plate 24. The' plate 24 is cut away obliquely, 190

as shown at 34, to accommodate the lever in a position alongside the plate 25. Intermediate its ends, the lever is loosely riveted to the plate 25,,as shown at In Fig. 3 the plate 25 is shown in advanced position to 105 couple the sleeve 21 to theshaft 18 by its insertion into the groove 26, and if thelever 33 is swung to the dotted position, the plate will be retracted-to uncouple the sleeve and the Shaft:

Between these two plates is slid- 6 The plate has a webbed enlargement ifl integral with the part 28 and provided with twolateral extensions 38 which are slotted as shown at 39 and straddle the plate 17., the latter having a curved edge. Set screws l0 are threaded through theparts 38, from the bottom thereof, and engage the platel"- to. lock the sleeve 21 and the parts carrled thereby to any position they maybe swung after having been locked to theshaft 18.

Theshaft 18 is held up or balanced by a counterweight ll carried by a cable all passing over a grooved pulley d1 mounted on a bottom extension of the bracket web 12, the cable being suit-ably connected to the lower end of the shaft. A collar 42 is adjustably fixed to the shaft above the bearing to limit its downward movement. The collar has, a key 43 seating in the shaft groove 26.

Theshaft 18 rises from the bracket 12- a suitable distance, and its upper end supports a horizontal plate as, the latter having a bearing d5 through which the shaft passes. A key %6 seating in the shaft groove 26 and in a registering groove in the bearing, locks.

the plate 4% against turning on the shaft. A crew e7 threaded sidewise through the bearing and acting on the key 46, locks the same to hold the plate at fixed on the shaft.

The plate at has twoupstanding end flanges 48 provided with laterally spaced apertures in which slidably seat horizontal, rods T9. These rods are adjustable lengthwise, and they are held in adjusted position by a transverse double-jawed clamping member 50 operated by a screw 51 threaded into an enlargement 52 on the top of theplate 44.

The rods L9 extend across the table 10 and terminate above the saw orothertool 60, where they carry a combined clamp andspacer block 53 having a bottom enlargement in the form of acircular plate 54. On the under side of theplate 54 is mounted ablock 55 of circular contour and having an outstanding marginal flange 56 at the top, said flange being in contact with theplate 54, and so held by a clamp 56 Theblock 55 has two depending, transverse and laterally spaced,bottom projections 57, the inner faces of which are grooved to form a slideway for aplate 58, which may be secured in fixed position by a screw threaded into the bottom of the part 54: and passing through a slot in theplate 58 and thepart 55 as shown in Fig. 6.

The parts .thus far described form an adjustable support for the guard associated with thetool 60. This guard has the shape of a hood made up of two laterally spaced open-work side members 61- connected by a solidtop portion 62. The guard straddles the saw and it is segmental. Eachfside member is fitted with aglass pane 63 to render the saw visible. The guard has two transverselyapertured ears 64 at the top,

and two similar cars are on the bottom of theplate 58. The cars 6ft and 65 are connected byparallel links 66, whereby the guard is pivotally supported from the plate This suspension permits the guard to be swung back as shown dotted in Fig. 5 in the direction of its length, whereupon it also rises to a sufiicient height to allow the work to be pushed under the guard past the saw. lVhen the work has passed the saw, the guard drops back and again completely incloses that portion of the saw which projects above the table 10.

To facilitate the easy engagement of the work with theguard 61, the receiving end of the latter is provided with two scroll springs 67.

A modified guard is shown in Figs. 8 and 9. This device is also attached to, theplate 58 and comprises a spring nose guard 68 at the receiving end for holding down the advancing work, and a pivoted rear end guard 69 to prevent the work from accidentally flying over and forward with the saw and striking the operator. The parts 68 and 69 are attached to theplate 58. The part 68 is slotted, as shown at 70, to permit the saw teeth to pass freely, the sides of the slot closing in on the saw blade back of the teeth to keep the guard centered. The opposite end oftheplate 58 has apertured ears 7 1., one pair to hold a U-shaped rod 71 which pivotally supports the guard member 69, and the other pair to hold a spring rod 7 2 carrying a marginal guard 73 along which the work slides on the table 10. The rods 71 and 72 are secured to theplate 58 by bolts 74 through the heads of which they pass, as shown in Fig. 9, said bolts being provided with nuts 7 5 on the top of the plate. Anut 76 prevents the guard 69 from sliding oil the rod 71.

Although the device shown in Fig. 8 has been shown separate and may be so used, it may also be incorporated with the guard shown in Fig. 5.

In use, the device is substantially in the position shown in Figs. 1 and 2, thescrews 40 having been tightened and the lever-33 advanced if the usual position of therods 49 is at right angles to the table edge,vas shown in full lines in Fig. 2. If, occasionally, the guard is to be used on a tool located at another portion of the table 10, thelever 33 may be retracted to release thesha t 18 from the sleeve 2]., and thescrew 59 loosened, after which the support can be swung horizontally to assume the position shown dotted in Fig. 2. or any'other desired. position with in. the range of adjustment, the/shaft now turning in the sleeve. By loosening theScrew 59 theplate 58 carrying the guard may be kept parallel to the table edge, The screws 4E0 need not be loosened, as with the last-described adjustment the groove 26 in theshaft 18 will have swung away from the key plate 25, and theplates 23, 24 and 25 may be made tight by thebolt 27, with thelever 33 retracted, there being sufficient clearance between these plates to cause the sleeve 21 to firmly bind theshaft 18 in the newly adjusted position when thebolt 27 is operated. The screws 4:0 are only loosened when permanent work is to be done with therods 49 at a new angle. Ordinarily when the guard is to be lifted off at the close of the day for cleaning the saw or other tool, thebolt 27 is loosened and thelever 33 is retracted, this loosening theshaft 18 so that it may be rotated to swing the guard away from the saw, the shaft being first raised until the guard clears the saw.

Various other types of guards besides the ones described hereinbefore may be attached to theplate 58.

I claimp 1. The combination of a support, a shaft carrying the support and having a longitudinal groove, a bearing bracket rotatably supporting the shaft, a sleeve mounted on the shaft, :1 key carried by the sleeve and adjustable to seat in the shaft groove, and

means for locking the sleeve to the bearing bracket.

2. The combination of a support, a shaft carrying the support and having a longitudinal groove, a bearing bracket rotatably supporting the shaft, a split sleeve encircling the shaft and having outstanding flanges at its ends, a key slidably mounted between said flanges and adapted to enter the shaft groove, a lever connected to the key for actuating the same and having its fulcrum on one of the flanges, and means for locking the sleeve to the bearing bracket.

3. The combination of a support, a shaft carrying the support and having a longitudinal groove, a bearing bracket rotatably supporting the shaft, a split sleeve encircling the shaft and having outstanding flanges at its ends, a key slidably mounted between said flanges and adapted to enter the shaft groove, a lever connected to the key foractuating the same and having its fulcrum on one of the flanges, means for locking the sleeve to the bearing bracket, and means for clamping the key between the flanges.

In testimony whereof I affix my signature.

PETER ERIGKSON.

Copies of this patent may be obtained for five cents each, by addressing the "Commissioner of Patents,

Washington, D. 0.

Images