Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS1240430 A
Publication typeGrant
Publication dateSep 18, 1917
Filing dateJul 22, 1916
Priority dateJul 22, 1916
Publication numberUS 1240430 A, US 1240430A, US-A-1240430, US1240430 A, US1240430A
InventorsPeter Erickson
Original AssigneePeter Erickson
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Cutter-guard.
US 1240430 A
Abstract  available in
Images(2)
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

- 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 the line 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 a saw 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 a base plate 13 which is secured to the apron by bolts 14 or other suitable means. The bracket also has a medial web 12, a vertical plate 15 parallel to and spaced from the base plate 13, a horizontal top plate 16 and a similar but larger bottom plate 17, said top and bottom plates being is an enlarged cross section on the spaced and formed with vertical bearings 19 and 20, respectively, in which is mounted an upright shaft 18. On the shaft 18, between the upper bearing 19 and the plate 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 or flanges 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 the shaft 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 its plates 23 and 24 are locked to the shaft 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 the bearing 19 and the plate 17 between which the sleeve is positioned. The plates 23, 24 and 25 have alined apertures to take a transverse bolt 27, the plates 23 and 24 having outward 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 actuating lever 30 for turning the same to draw the plates together. The plate 25 also has a horizontal slot 31 through which passes a short pin 32 the ends of which are fixed in the plates 23 and 24. This slot and pin limit the sliding movement of the plate 25 hereinbefore described. The aperture in the plate 25 for the bolt 27 is elongated sufiiciently to allow the plate to be slid as described.

. To operate the key, plate 25, a lever 33 is provided, the upper end of which serves as a handle, and thejlower end as a fulcrum, the same seating in a notch 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 the shaft 18 by its insertion into the groove 26, and if the lever 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 two lateral 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 the parts 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 the shaft 18.

The shaft 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.

The shaft 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 two upstanding 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 the plate 44.

The rods L9 extend across the table 10 and terminate above the saw or othertool 60, where they carry a combined clamp and spacer block 53 having a bottom enlargement in the form of a circular plate 54. On the under side of the plate 54 is mounted a block 55 of circular contour and having an outstanding marginal flange 56 at the top, said flange being in contact with the plate 54, and so held by a clamp 56 The block 55 has two depending, transverse and laterally spaced, bottom projections 57, the inner faces of which are grooved to form a slideway for a plate 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 the plate 58 and the part 55 as shown in Fig. 6.

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

and two similar cars are on the bottom of the plate 58. The cars 6ft and 65 are connected by parallel 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 the guard 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, the plate 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 the plate 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 of theplate 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 the plate 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. A nut 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, the screws 40 having been tightened and the lever-33 advanced if the usual position of the rods 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, the lever 33 may be retracted to release the sha t 18 from the sleeve 2]., and the screw 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 the Screw 59 the plate 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 the shaft 18 will have swung away from the key plate 25, and the plates 23, 24 and 25 may be made tight by the bolt 27, with the lever 33 retracted, there being sufficient clearance between these plates to cause the sleeve 21 to firmly bind the shaft 18 in the newly adjusted position when the bolt 27 is operated. The screws 4:0 are only loosened when permanent work is to be done with the rods 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, the bolt 27 is loosened and the lever 33 is retracted, this loosening the shaft 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 the plate 58.

I claim p 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.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2487396 *Jan 19, 1948Nov 8, 1949Theodore SummersWarning guard for saws
US2742063 *Mar 29, 1954Apr 17, 1956Bretthauer Frank NGuard for table saws
US2876810 *Mar 4, 1958Mar 10, 1959Peterson Joseph MPoint of operation saw guard
US3105530 *Oct 23, 1961Oct 1, 1963Peterson Russell EGuard for a circular table saw
US6857345Aug 13, 2001Feb 22, 2005Sd3, LlcBrake positioning system
US6877410Jan 15, 2002Apr 12, 2005Sd3, LlcMiter saw with improved safety system
US6920814Aug 13, 2001Jul 26, 2005Sd3, LlcCutting tool safety system
US6945149Jul 25, 2002Sep 20, 2005Sd3, LlcActuators for use in fast-acting safety systems
US6997090Feb 23, 2004Feb 14, 2006Sd3, LlcSafety systems for power equipment
US7024975Aug 13, 2001Apr 11, 2006Sd3, LlcBrake mechanism for power equipment
US7055417Sep 29, 2000Jun 6, 2006Sd3, LlcSafety system for power equipment
US7100483Aug 13, 2001Sep 5, 2006Sd3, LlcFiring subsystem for use in a fast-acting safety system
US7137326Aug 13, 2001Nov 21, 2006Sd3, LlcTranslation stop for use in power equipment
US7171879Jul 2, 2002Feb 6, 2007Sd3, LlcDiscrete proximity detection system
US7210383Aug 13, 2001May 1, 2007Sd3, LlcDetection system for power equipment
US7225712Aug 13, 2001Jun 5, 2007Sd3, LlcMotion detecting system for use in a safety system for power equipment
US7228772Feb 18, 2005Jun 12, 2007Sd3, LlcBrake positioning system
US7284467Aug 13, 2001Oct 23, 2007Sd3, LlcApparatus and method for detecting dangerous conditions in power equipment
US7290472Sep 1, 2004Nov 6, 2007Sd3, LlcMiter saw with improved safety system
US7308843Aug 13, 2001Dec 18, 2007Sd3, LlcSpring-biased brake mechanism for power equipment
US7347131Jun 2, 2006Mar 25, 2008Sd3, LlcMiter saw with improved safety system
US7347851Mar 9, 2004Mar 25, 2008Leo B KriksunovNeedleless hypodermic jet injector apparatus and method
US7350444Aug 13, 2001Apr 1, 2008Sd3, LlcTable saw with improved safety system
US7350445Aug 20, 2004Apr 1, 2008Sd3, LlcBrake cartridge for power equipment
US7353737Apr 4, 2005Apr 8, 2008Sd3, LlcMiter saw with improved safety system
US7357056Jul 25, 2005Apr 15, 2008Sd3, LlcCutting tool safety system
US7359174Aug 18, 2006Apr 15, 2008Sd3, LlcMotion detecting system for use in a safety system for power equipment
US7421315Jul 17, 2006Sep 2, 2008Sd3, LlcDetection system for power equipment
US7472634Aug 20, 2004Jan 6, 2009Sd3, LlcWoodworking machines with overmolded arbors
US7481140Apr 15, 2005Jan 27, 2009Sd3, LlcDetection systems for power equipment
US7509899Aug 13, 2001Mar 31, 2009Sd3, LlcRetraction system for use in power equipment
US7525055Apr 11, 2006Apr 28, 2009Sd3, LlcSwitch box for power tools with safety systems
US7536238Dec 31, 2004May 19, 2009Sd3, LlcDetection systems for power equipment
US7591210Feb 5, 2007Sep 22, 2009Sd3, LlcDiscrete proximity detection system
US7600455Oct 13, 2009Sd3, LlcLogic control for fast-acting safety system
US7621205Nov 24, 2009Sd3, LlcBand saw with safety system
US7681479Mar 23, 2010Sd3, LlcMotion detecting system for use in a safety system for power equipment
US7707920Dec 31, 2004May 4, 2010Sd3, LlcTable saws with safety systems
US7712403Jul 2, 2002May 11, 2010Sd3, LlcActuators for use in fast-acting safety systems
US7784507Aug 19, 2005Aug 31, 2010Sd3, LlcRouter with improved safety system
US7788999Apr 10, 2006Sep 7, 2010Sd3, LlcBrake mechanism for power equipment
US7827890Nov 9, 2010Sd3, LlcTable saws with safety systems and systems to mount and index attachments
US7827893Mar 14, 2007Nov 9, 2010Sd3, LlcElevation mechanism for table saws
US7832314Nov 16, 2010Sd3, LlcBrake positioning system
US7836804Dec 29, 2006Nov 23, 2010Sd3, LlcWoodworking machines with overmolded arbors
US7866239Mar 14, 2007Jan 11, 2011Sd3, LlcElevation mechanism for table saws
US7895927May 19, 2010Mar 1, 2011Sd3, LlcPower equipment with detection and reaction systems
US7921754Apr 12, 2011Sd3, LlcLogic control for fast-acting safety system
US7991503May 18, 2009Aug 2, 2011Sd3, LlcDetection systems for power equipment
US8061245Nov 22, 2011Sd3, LlcSafety methods for use in power equipment
US8065943Nov 29, 2011Sd3, LlcTranslation stop for use in power equipment
US8087438Jan 3, 2012Sd3, LlcDetection systems for power equipment
US8100039Apr 19, 2010Jan 24, 2012Sd3, LlcMiter saw with safety system
US8122807May 3, 2010Feb 28, 2012Sd3, LlcTable saws with safety systems
US8151675Mar 31, 2011Apr 10, 2012Sd3, LlcLogic control for fast-acting safety system
US8186255Nov 16, 2009May 29, 2012Sd3, LlcContact detection system for power equipment
US8191450Aug 20, 2010Jun 5, 2012Sd3, LlcPower equipment with detection and reaction systems
US8196499Aug 20, 2010Jun 12, 2012Sd3, LlcPower equipment with detection and reaction systems
US8408106Apr 2, 2013Sd3, LlcMethod of operating power equipment with detection and reaction systems
US8459157Jun 11, 2013Sd3, LlcBrake cartridges and mounting systems for brake cartridges
US8489223Dec 23, 2011Jul 16, 2013Sd3, LlcDetection systems for power equipment
US8498732Dec 19, 2011Jul 30, 2013Sd3, LlcDetection systems for power equipment
US8505424Nov 8, 2010Aug 13, 2013Sd3, LlcTable saws with safety systems and systems to mount and index attachments
US8522655Apr 9, 2012Sep 3, 2013Sd3, LlcLogic control for fast-acting safety system
US9038515Aug 29, 2013May 26, 2015Sd3, LlcLogic control for fast-acting safety system
US20020017175 *Aug 13, 2001Feb 14, 2002Gass Stephen F.Translation stop for use in power equipment
US20020017178 *Aug 13, 2001Feb 14, 2002Gass Stephen F.Motion detecting system for use in a safety system for power equipment
US20020017179 *Aug 13, 2001Feb 14, 2002Gass Stephen F.Miter saw with improved safety system
US20020017180 *Aug 13, 2001Feb 14, 2002Gass Stephen F.Brake mechanism for power equipment
US20020017181 *Aug 13, 2001Feb 14, 2002Gass Stephen F.Retraction system for use in power equipment
US20020017182 *Aug 13, 2001Feb 14, 2002Gass Stephen F.Brake positioning system
US20020017183 *Aug 13, 2001Feb 14, 2002Gass Stephen F.Cutting tool safety system
US20020020262 *Aug 13, 2001Feb 21, 2002Gass Stephen F.Logic control for fast-acting safety system
US20020020263 *Aug 13, 2001Feb 21, 2002Gass Stephen F.Firing subsystem for use in a fast-acting safety system
US20020020271 *Aug 13, 2001Feb 21, 2002Gass Stephen F.Spring-biased brake mechanism for power equipment
US20020056348 *Jan 14, 2002May 16, 2002Gass Stephen F.Miter saw with improved safety system
US20020056349 *Jan 14, 2002May 16, 2002Gass Stephen F.Miter saw with improved safety system
US20020056350 *Jan 16, 2002May 16, 2002Gass Stephen F.Table saw with improved safety system
US20020059853 *Jan 16, 2002May 23, 2002Gass Stephen F.Power saw with improved safety system
US20020059855 *Jan 16, 2002May 23, 2002Gass Stephen F.Miter saw with improved safety system
US20020066346 *Jan 15, 2002Jun 6, 2002Gass Stephen F.Miter saw with improved safety system
US20020170399 *Mar 13, 2002Nov 21, 2002Gass Stephen F.Safety systems for power equipment
US20020170400 *May 15, 2002Nov 21, 2002Gass Stephen F.Band saw with improved safety system
US20030015253 *Jul 18, 2002Jan 23, 2003Gass Stephen F.Router with improved safety system
US20030019341 *Jul 25, 2002Jan 30, 2003Gass Stephen F.Safety systems for band saws
US20030037651 *Aug 9, 2002Feb 27, 2003Gass Stephen F.Safety systems for power equipment
US20030056853 *Sep 20, 2002Mar 27, 2003Gass Stephen F.Router with improved safety system
US20030058121 *Sep 13, 2002Mar 27, 2003Gass Stephen F.Logic control with test mode for fast-acting safety system
US20030090224 *Nov 12, 2002May 15, 2003Gass Stephen F.Detection system for power equipment
US20030131703 *Jan 15, 2003Jul 17, 2003Gass Stephen F.Apparatus and method for detecting dangerous conditions in power equipment
US20030140749 *Jan 13, 2003Jul 31, 2003Gass Stephen F.Brake Pawls for power equipment
US20040040426 *Aug 18, 2003Mar 4, 2004Gass Stephen F.Miter saw with improved safety system
US20040163514 *Feb 23, 2004Aug 26, 2004Gass Stephen F.Safety systems for power equipment
US20040173430 *Mar 4, 2004Sep 9, 2004Gass Stephen F.Retraction system and motor position for use with safety systems for power equipment
US20050039586 *Aug 20, 2004Feb 24, 2005Gass Stephen F.Brake cartridges for power equipment
US20050041359 *Aug 20, 2004Feb 24, 2005Gass Stephen F.Motion detecting system for use in a safety system for power equipment
US20050139051 *Feb 18, 2005Jun 30, 2005Gass Stephen F.Brake positioning system
US20050139057 *Dec 31, 2004Jun 30, 2005Gass Stephen F.Table saws with safety systems
US20050139058 *Dec 31, 2004Jun 30, 2005Gass Stephen F.Brake cartridges and mounting systems for brake cartridges
US20050139459 *Dec 31, 2004Jun 30, 2005Gass Stephen F.Switch box for power tools with safety systems
US20050155473 *Dec 31, 2004Jul 21, 2005Gass Stephen F.Dectection systems for power equipment
US20050178259 *Apr 4, 2005Aug 18, 2005Gass Stephen F.Miter saw with improved safety system
US20050204885 *Sep 1, 2004Sep 22, 2005Gass Stephen FMiter saw with improved safety system
US20050252187 *Jul 25, 2005Nov 17, 2005Gass Stephen FCutting tool safety system
US20050274432 *Aug 19, 2005Dec 15, 2005Gass Stephen FRouter with improved safety system
US20060000337 *Sep 2, 2005Jan 5, 2006Gass Stephen FBand saw with safety system
US20060032352 *Oct 24, 2005Feb 16, 2006Gass Stephen FTranslation stop for use in power equipment
US20060123960 *Feb 13, 2006Jun 15, 2006Gass Stephen FSafety systems for power equipment
US20060123964 *Feb 6, 2006Jun 15, 2006Gass Stephen FTable saw with improved safety system
US20060247795 *Apr 15, 2005Nov 2, 2006Gass Stephen FDetection systems for power equipment
DE102011009804A1 *Jan 31, 2011Aug 2, 2012Felder KgMachine tool, particularly wood working machine, comprises pivotable saw blade with saw blade center plane and protection device for saw blade, where protection device comprises protection hood for saw blade
DE102011009804B4 *Jan 31, 2011Dec 24, 2014Felder KgWerkzeugmaschine mit einem schwenkbaren Sägeblatt und dazu quer angeordnetem Parallelogrammlenker für eine Schutzhaube
Classifications
U.S. Classification83/860
Cooperative ClassificationB27G19/02
European ClassificationB27G19/02