US1774521A - Saw guard - Google Patents
Saw guard Download PDFInfo
- Publication number
- US1774521A US1774521A US31617128A US1774521A US 1774521 A US1774521 A US 1774521A US 31617128 A US31617128 A US 31617128A US 1774521 A US1774521 A US 1774521A
- Authority
- US
- United States
- Prior art keywords
- guard
- saw
- timber
- saw guard
- front guard
- Prior art date
- 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
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
- B27G19/00—Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws
- B27G19/02—Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws for circular saws
-
- Y—GENERAL 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/727—With means to guide moving work
- Y10T83/732—With guard
Definitions
- the forward extremity of the toe is preferably located at or slightly below the highest level of the saw, so that in case a timber is fed to the saw which is too thi k to be cut thereby the toe will abruptly strike the end or side of the timber and prevent further movement of the latter un less the guard is lifted. so that the operator will have notice of the extra thickness.
- the sides of the rear guard member 15 are recessed to a depth corresponding to the thickness of the cars 21 of the front guard memb r, so that the sides of both guard members lie in the same plane and as nearly flush as possible.
- the joining portion between the two sides of the member 20 at the top edge is extended rearwardly toward the pivot to such distance that when the toe of the front guard is lifted and the guard moved rearwardly, the top edge 17 of the rear guard will strike against the joining portion and check such rearward movement of the front guard when its center of gravity has just passed dead center with respect to the pin 14:.
- the front guard may be manually lifted and moved into inoperative position ⁇ where it will remain while a timber is brought into engagement with the saw, but upon a very slight movement of the cut timber in engagement with the rear guard member, the lifting of the latter will throw the front guard member forwardly sufficiently to fall upon the work by gravity and consequently become immediately operative after the timber has s d rearwawllv beside the saw. or in case timber is withdrawn the front guard will fall to the table in initial operative position as before.
- the member 12 is shown as formed with a planiform vertical face the lower end of the splitter being apertured to receive two rap screws 24: by which the splitter is securely clamped against the member 12.
- the guard parts may thus be permanently pivoted on the splitter with a good bearing, and they will automatically fall into proper operative positions with respect to the saw when the splitter is put in place.
- a rotary saw guard comprising a support adapted to be located over a rotary saw adjacent its vertical radius, a rear guard pivoted on the support adapted to lie beside a saw and in close relation to a work table for engagement by stock passing beside the saw, and a front guard pivoted on the support and separately movable from operative to inoperative position past dead center, the two guards being constructed to co-engage at the limit of raising movement of the front guard for support of the front guard in inoperative position while the rear guard is in initial position, said front guard being free to fall forward when the rear guard is raised pivotally a distance.
Description
P 9 w. s. NEIGHBOUR 1,774,521
SAW GUARD Filed Oct. 51, 1928 2 Sheets-Shee l Sept. 2, 1930. 1,774,521
W. S. NEIGHBOUR SAW GUARD Filed Oct. 31, 1928 2 ShOGtS-Sheai 2 I Qwuwntox;
' falls on each side of the saw after the manner of wings, and forms a partial enclosure for the forward part of the saw when in initial lowered position. It is formed with an integral forwardly and upwardly inclined toe 22, having a curved lower face convergent toward the top of the table and toward the rear at a progressively reduced angle, the extreme forward part when the device rests upon the table having a suitable angle with respect to the table to permit stock to be readily pressed rearwardly thereunder so as to cause the guard member to ride upon the timber and be lifted, permitting the timber to engage the saw. The forward extremity of the toe is preferably located at or slightly below the highest level of the saw, so that in case a timber is fed to the saw which is too thi k to be cut thereby the toe will abruptly strike the end or side of the timber and prevent further movement of the latter un less the guard is lifted. so that the operator will have notice of the extra thickness. The sides of the rear guard member 15 are recessed to a depth corresponding to the thickness of the cars 21 of the front guard memb r, so that the sides of both guard members lie in the same plane and as nearly flush as possible. It is important to note that the joining portion between the two sides of the member 20 at the top edge is extended rearwardly toward the pivot to such distance that when the toe of the front guard is lifted and the guard moved rearwardly, the top edge 17 of the rear guard will strike against the joining portion and check such rearward movement of the front guard when its center of gravity has just passed dead center with respect to the pin 14:. As a result, the front guard may be manually lifted and moved into inoperative position\ where it will remain while a timber is brought into engagement with the saw, but upon a very slight movement of the cut timber in engagement with the rear guard member, the lifting of the latter will throw the front guard member forwardly sufficiently to fall upon the work by gravity and consequently become immediately operative after the timber has s d rearwawllv beside the saw. or in case timber is withdrawn the front guard will fall to the table in initial operative position as before.
Various forms of quick-detachable mountug for the splitter upon the mounting member may be employed. In the present instance the member 12 is shown as formed with a planiform vertical face the lower end of the splitter being apertured to receive two rap screws 24: by which the splitter is securely clamped against the member 12. The guard parts may thus be permanently pivoted on the splitter with a good bearing, and they will automatically fall into proper operative positions with respect to the saw when the splitter is put in place.
I claim:
A rotary saw guard comprising a support adapted to be located over a rotary saw adjacent its vertical radius, a rear guard pivoted on the support adapted to lie beside a saw and in close relation to a work table for engagement by stock passing beside the saw, and a front guard pivoted on the support and separately movable from operative to inoperative position past dead center, the two guards being constructed to co-engage at the limit of raising movement of the front guard for support of the front guard in inoperative position while the rear guard is in initial position, said front guard being free to fall forward when the rear guard is raised pivotally a distance.
In testimony whereof I aflix my signature.
WILBUR s. NEIGHBOUR.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US31617128 US1774521A (en) | 1928-10-31 | 1928-10-31 | Saw guard |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US31617128 US1774521A (en) | 1928-10-31 | 1928-10-31 | Saw guard |
Publications (1)
Publication Number | Publication Date |
---|---|
US1774521A true US1774521A (en) | 1930-09-02 |
Family
ID=23227814
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US31617128 Expired - Lifetime US1774521A (en) | 1928-10-31 | 1928-10-31 | Saw guard |
Country Status (1)
Country | Link |
---|---|
US (1) | US1774521A (en) |
Cited By (57)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2801656A (en) * | 1951-08-10 | 1957-08-06 | Ford Robert Sedgwick | Universal work holder for saws and other woodworking machines |
FR2671024A1 (en) * | 1990-12-27 | 1992-07-03 | Quillery Ste Nale Construction | Protection device for a circular saw |
US20020017179A1 (en) * | 2000-08-14 | 2002-02-14 | Gass Stephen F. | Miter saw with improved safety system |
US20020017181A1 (en) * | 2000-08-14 | 2002-02-14 | Gass Stephen F. | Retraction system for use in power equipment |
US20020017182A1 (en) * | 2000-08-14 | 2002-02-14 | Gass Stephen F. | Brake positioning system |
US20020017183A1 (en) * | 2000-08-14 | 2002-02-14 | Gass Stephen F. | Cutting tool safety system |
US20020017180A1 (en) * | 2000-08-14 | 2002-02-14 | Gass Stephen F. | Brake mechanism for power equipment |
US20020017178A1 (en) * | 2000-08-14 | 2002-02-14 | Gass Stephen F. | Motion detecting system for use in a safety system for power equipment |
US20020020271A1 (en) * | 2000-08-14 | 2002-02-21 | Gass Stephen F. | Spring-biased brake mechanism for power equipment |
US20020020262A1 (en) * | 2000-08-14 | 2002-02-21 | Gass Stephen F. | Logic control for fast-acting safety system |
US20020020263A1 (en) * | 2000-08-14 | 2002-02-21 | Gass Stephen F. | Firing subsystem for use in a fast-acting safety system |
US20020056349A1 (en) * | 2000-09-29 | 2002-05-16 | Gass Stephen F. | Miter saw with improved safety system |
US20020056350A1 (en) * | 2000-09-29 | 2002-05-16 | Gass Stephen F. | Table saw with improved safety system |
US20020056348A1 (en) * | 2000-09-29 | 2002-05-16 | Gass Stephen F. | Miter saw with improved safety system |
US20020059855A1 (en) * | 2000-09-29 | 2002-05-23 | Gass Stephen F. | Miter saw with improved safety system |
US20020059853A1 (en) * | 2000-09-29 | 2002-05-23 | Gass Stephen F. | Power saw with improved safety system |
US20020066346A1 (en) * | 2000-09-29 | 2002-06-06 | Gass Stephen F. | Miter saw with improved safety system |
US6405624B2 (en) | 1998-07-08 | 2002-06-18 | Delta International Machinery Corp. | Splitter and cutting member guard assembly |
US20020170400A1 (en) * | 2001-05-17 | 2002-11-21 | Gass Stephen F. | Band saw with improved safety system |
US20020170399A1 (en) * | 1999-10-01 | 2002-11-21 | Gass Stephen F. | Safety systems for power equipment |
US20030015253A1 (en) * | 2001-07-18 | 2003-01-23 | Gass Stephen F. | Router with improved safety system |
US20030019341A1 (en) * | 2001-07-27 | 2003-01-30 | Gass Stephen F. | Safety systems for band saws |
US20030037651A1 (en) * | 2001-08-13 | 2003-02-27 | Gass Stephen F. | Safety systems for power equipment |
US20030058121A1 (en) * | 2001-09-24 | 2003-03-27 | Gass Stephen F. | Logic control with test mode for fast-acting safety system |
US20030056853A1 (en) * | 2001-09-21 | 2003-03-27 | Gass Stephen F. | Router with improved safety system |
US20030090224A1 (en) * | 2001-11-13 | 2003-05-15 | Gass Stephen F. | Detection system for power equipment |
US20030131703A1 (en) * | 2002-01-16 | 2003-07-17 | Gass Stephen F. | Apparatus and method for detecting dangerous conditions in power equipment |
US20030140749A1 (en) * | 2002-01-25 | 2003-07-31 | Gass Stephen F. | Brake Pawls for power equipment |
US20040040426A1 (en) * | 2002-08-27 | 2004-03-04 | Gass Stephen F. | Miter saw with improved safety system |
US20050041359A1 (en) * | 2003-08-20 | 2005-02-24 | Gass Stephen F. | Motion detecting system for use in a safety system for power equipment |
US20050039586A1 (en) * | 2003-08-20 | 2005-02-24 | Gass Stephen F. | Brake cartridges for power equipment |
US20050139058A1 (en) * | 2003-12-31 | 2005-06-30 | Gass Stephen F. | Brake cartridges and mounting systems for brake cartridges |
US20050139459A1 (en) * | 2003-12-31 | 2005-06-30 | Gass Stephen F. | Switch box for power tools with safety systems |
US20050139057A1 (en) * | 2003-12-31 | 2005-06-30 | Gass Stephen F. | Table saws with safety systems |
US20050155473A1 (en) * | 2003-12-31 | 2005-07-21 | Gass Stephen F. | Dectection systems for power equipment |
US20050178259A1 (en) * | 2001-08-13 | 2005-08-18 | Gass Stephen F. | Miter saw with improved safety system |
US6945149B2 (en) | 2001-07-25 | 2005-09-20 | Sd3, Llc | Actuators for use in fast-acting safety systems |
US20050204885A1 (en) * | 2002-01-14 | 2005-09-22 | Gass Stephen F | Miter saw with improved safety system |
US20050252187A1 (en) * | 2000-09-29 | 2005-11-17 | Gass Stephen F | Cutting tool safety system |
US20060032352A1 (en) * | 2000-09-18 | 2006-02-16 | Gass Stephen F | Translation stop for use in power equipment |
US7055417B1 (en) | 1999-10-01 | 2006-06-06 | Sd3, Llc | Safety system for power equipment |
US20060247795A1 (en) * | 2005-04-15 | 2006-11-02 | Gass Stephen F | Detection systems for power equipment |
US7137326B2 (en) | 2000-08-14 | 2006-11-21 | Sd3, Llc | Translation stop for use in power equipment |
US7171879B2 (en) | 2001-07-02 | 2007-02-06 | Sd3, Llc | Discrete proximity detection system |
US7210383B2 (en) | 2000-08-14 | 2007-05-01 | Sd3, Llc | Detection system for power equipment |
US7284467B2 (en) | 2000-08-14 | 2007-10-23 | Sd3, Llc | Apparatus and method for detecting dangerous conditions in power equipment |
US7347851B1 (en) | 2004-03-09 | 2008-03-25 | Leo B Kriksunov | Needleless hypodermic jet injector apparatus and method |
US7350444B2 (en) | 2000-08-14 | 2008-04-01 | Sd3, Llc | Table saw with improved safety system |
US7472634B2 (en) | 2003-08-20 | 2009-01-06 | Sd3, Llc | Woodworking machines with overmolded arbors |
US7712403B2 (en) | 2001-07-03 | 2010-05-11 | Sd3, Llc | Actuators for use in fast-acting safety systems |
US7827890B2 (en) | 2004-01-29 | 2010-11-09 | Sd3, Llc | Table saws with safety systems and systems to mount and index attachments |
US7836804B2 (en) | 2003-08-20 | 2010-11-23 | Sd3, Llc | Woodworking machines with overmolded arbors |
US8079295B2 (en) | 2008-06-20 | 2011-12-20 | Sd3, Llc | Table saw blade guards and blade guard assemblies including lateral blade guards, and table saws including the same |
US8186255B2 (en) | 2000-09-29 | 2012-05-29 | Sd3, Llc | Contact detection system for power equipment |
US10118308B2 (en) | 2013-10-17 | 2018-11-06 | Sawstop Holding Llc | Systems to mount and index riving knives and spreaders in table saws |
US20200180186A1 (en) * | 2015-12-16 | 2020-06-11 | Black & Decker Inc. | Tile saw |
US10967536B2 (en) | 2011-02-17 | 2021-04-06 | Sawstop Holding Llc | Blade guard for a table saw |
-
1928
- 1928-10-31 US US31617128 patent/US1774521A/en not_active Expired - Lifetime
Cited By (119)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2801656A (en) * | 1951-08-10 | 1957-08-06 | Ford Robert Sedgwick | Universal work holder for saws and other woodworking machines |
FR2671024A1 (en) * | 1990-12-27 | 1992-07-03 | Quillery Ste Nale Construction | Protection device for a circular saw |
US6405624B2 (en) | 1998-07-08 | 2002-06-18 | Delta International Machinery Corp. | Splitter and cutting member guard assembly |
US8196499B2 (en) | 1999-10-01 | 2012-06-12 | Sd3, Llc | Power equipment with detection and reaction systems |
US7895927B2 (en) | 1999-10-01 | 2011-03-01 | Sd3, Llc | Power equipment with detection and reaction systems |
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US9969014B2 (en) | 1999-10-01 | 2018-05-15 | Sawstop Holding Llc | Power equipment with detection and reaction systems |
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US20060000337A1 (en) * | 1999-10-01 | 2006-01-05 | Gass Stephen F | Band saw with safety system |
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US11027452B2 (en) | 2011-02-17 | 2021-06-08 | Sawstop Holding Llc | Blade guard for a table saw |
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