US1082870A - Saw-guard. - Google Patents

Saw-guard. Download PDF

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Publication number
US1082870A
US1082870A US1912732571A US1082870A US 1082870 A US1082870 A US 1082870A US 1912732571 A US1912732571 A US 1912732571A US 1082870 A US1082870 A US 1082870A
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United States
Prior art keywords
guard
saw
slots
invention
guide frame
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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
John W Humason
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John W Humason
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Priority to US1912732571 priority Critical patent/US1082870A/en
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Publication of US1082870A publication Critical patent/US1082870A/en
Anticipated expiration legal-status Critical
Application status is Expired - Lifetime legal-status Critical

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27GACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
    • B27G19/00Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws
    • B27G19/02Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws for circular saws
    • 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
    • Y10T83/727With means to guide moving work
    • Y10T83/732With guard

Description

J. W. HUMASON.

saw GUARD. APPLIOATION FILED NOV. 20, 1912.

1,089,870., Patentd Dec. 30, 1513.

urrah @TATES PATENT UFl llQlE.

JOHN W- HUMASON, CF YDUNG'S'IQVVN, OHIO.

' saw-GUARD.

aos ae'io.

and State of Ohio, have invented certain new and useful Improvements in Saw- .Guards, of which the following is a specification.

-.This invention comprehends certain new and useful improvements in saw guards, and relates more particularly to guards designed especially for use on circular saws.

The pr mary object of the invention resides in the provision of a saw guard which shall be of extremely simple construction, strong, durable, and automatic in operation.

Another andmore specific object of the invention is the provision of a saw guard comprising a pair of spaced parallel plates, mounted for upward and rearward movement in a slotted guide frame.

The invention also aims to provide a guard of this nature, which will prevent the operator accidentally coming in contact with the saw, which will operate with little or no extra effort on the part of the saw-yer, and which may be easily installed.

' With'these and other objects in view, as

will become more apparent as the description proceeds, the invention consists in certain novel features of combination, construction, and arrangement of parts, which will be hereinafter fully described and claimed.

For a complete understanding of my invention, reference is to be had to the following description and accompanying drawings, in which,

Figure l is a side elevation of my invention, showing the guard in-its operative position, Fig. 2 is a similar View, showing the guard artly raised, Fig.3 is a transverse sectiona view taken upon the plane of line 33 of Fig. 2, and, Fig. 4 is a side elevation of my invention, showing the guard locked in its raised position.

- Referring to the drawings in detail by numerals, 1 designates, generally, the guide frame, which is forme preferably of aluminum and comprises a slotted plate reinforced about its perimeter by the rib 2-. The front and rear edges of the guide frame are inclined downwardly and'forwardly, as indicated inthe drawings. The body portion 3 of the frame may be formed with a con tral opening l to reduce weight, and the guide slots '5 formed adjacentto the front Specification of Letters Patent.

Application filed November 20, 1912. Serial No. 732,571.

,rollers, tobev referred to hereinafter. top edge of the guide frame is formed with Patented Dec. 30, 15913.

and rear edges of said body. These. slots are extended, at their upper extren'uties,

rearwardly and slightly downwardly, as in dicated at 6. Reinforcing ribs 7 and Sareformed adjacent tothe inner edges of the slots for the purpose of strengthening the guide frame and forming a better track for The the projections 9, whereby said frame may be; easily secured to suitable supporting members 10. It is to be understood that I do not wish to be limited to this particular fastening means but may secure the guide frame either to the top of the saw table indicated by the line 11 or to the ceiling of a room in any desired manner.

The saw guard comprises the parallel spaced plates 12 which may be reinforced along their perimeters by the ribs 13. The corners of the plates 12 are further thickened. as shown in the drawings, and provided with circular openings to receive the rivets 1i and 15. A spacing block 16 is positioned, upon the intermediate portion of the rear rivet 14, a large roller 17 is mounted upon the forward rivet 14c, and smaller rollers 18 are carried by the rivets 15, whereby the plates 12 are held in parallel spaced relationship. The rollers 18 work within the slots 5 of the guide frame 1 and raise automatically when a rearward pressure is applied to the roller 17,- as would be the case when a piece of timber 19 is being moved into contact with the saw 20. When the rollers 18 reach the upper ends of the slots 5 and move into the portions 6 thereof, the saw tive position. 7

It is to be understood that the guide frame and saw guard may be made of any suitable material of any size and may be positioned at any suitable height above the table top 11 so as to effectually guard the saw 20. As shown in the drawings, the top of the saw guard and bottom of the guide frame are somewhat curved to present a pleasing appearance and permit of the roller 17 being raised without interfering with the proper action of the rollers 18.

In the operation of my improved saw guard,-the piece of wood 19 to be sawed, is pushed rearwardly against the roller 17,- thus raising the guard so as to permit of the wood coming in contact with the saw. The

ofi'set portions 6 of theslots 5- are provided guide is locked in its raised or inopera-v While I have shown and described the preferred embodiment of my invention, 1 do not wish to be limited to the exact combination and arrangementor" parts, but may make such changes as will fall within the scope and spirit of the invention.

Having thus described my invention what I claim is: v i

1. A guard for circular saws, comprising a guide member formed with downwardly and forw rdly extending slots, parallel guard plates, means for holding said plates in spaced relationship, and rollers mounted upon certain of said means, for movement within the slotted member.

2. A guard for circular saws, comprising ,o'sasm a guide frame formed adjacent its front and ar edges'with downwardly and forwardly lined slots, the upper ends of said slots extended rearwardly and downwardly,

spaced guard plates, means for holding said plates in spaced relationship, rollers mounted upon certain of said means for movement within the slots, whereby the guard plates are guided and may be locked in their raised position, and an additional roller upon one of said means for engagementwith a piece of timber to be sawed. a In testimony whereof I aflix my signatur in presence of two witnesses.

JOHN W. 'HUMASON.

Witnesses:

H. A. ERNST, H. M. SHUGART.

US1912732571 1912-11-20 1912-11-20 Saw-guard. Expired - Lifetime US1082870A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US1912732571 US1082870A (en) 1912-11-20 1912-11-20 Saw-guard.

Applications Claiming Priority (1)

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US1912732571 US1082870A (en) 1912-11-20 1912-11-20 Saw-guard.

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Cited By (63)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4418597A (en) * 1982-01-18 1983-12-06 Emerson Electric Co. Anti-kickback device
DE9406662U1 (en) * 1994-04-21 1994-07-21 Avola Maschinenfabrik A Volken Moving protective device for table saws
US20020017183A1 (en) * 2000-08-14 2002-02-14 Gass Stephen F. Cutting tool safety system
US20020017181A1 (en) * 2000-08-14 2002-02-14 Gass Stephen F. Retraction system for use in power equipment
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
US20020017182A1 (en) * 2000-08-14 2002-02-14 Gass Stephen F. Brake positioning system
US20020017175A1 (en) * 2000-08-14 2002-02-14 Gass Stephen F. Translation stop for use in power equipment
US20020017179A1 (en) * 2000-08-14 2002-02-14 Gass Stephen F. Miter saw with improved safety system
US20020020271A1 (en) * 2000-08-14 2002-02-21 Gass Stephen F. Spring-biased brake mechanism for power equipment
US20020020263A1 (en) * 2000-08-14 2002-02-21 Gass Stephen F. Firing subsystem for use in a fast-acting safety system
US20020020262A1 (en) * 2000-08-14 2002-02-21 Gass Stephen F. Logic control for fast-acting safety system
US20020056348A1 (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
US20020056349A1 (en) * 2000-09-29 2002-05-16 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
US20020059855A1 (en) * 2000-09-29 2002-05-23 Gass Stephen F. Miter saw with improved safety system
US20020066346A1 (en) * 2000-09-29 2002-06-06 Gass Stephen F. Miter saw with improved safety system
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
US6578460B2 (en) * 2000-12-26 2003-06-17 James A. Sartori Blade guard assembly
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
US20040173430A1 (en) * 2003-03-05 2004-09-09 Gass Stephen F. Retraction system and motor position for use with safety systems for power equipment
US20050039822A1 (en) * 2003-08-20 2005-02-24 Gass Stephen F. Woodworking machines with overmolded arbors
US20050039586A1 (en) * 2003-08-20 2005-02-24 Gass Stephen F. Brake cartridges for power equipment
US20050041359A1 (en) * 2003-08-20 2005-02-24 Gass Stephen F. Motion detecting system for use in a safety system for power equipment
US20050139057A1 (en) * 2003-12-31 2005-06-30 Gass Stephen F. Table saws with safety systems
US20050139459A1 (en) * 2003-12-31 2005-06-30 Gass Stephen F. Switch box for power tools with safety systems
US20050139058A1 (en) * 2003-12-31 2005-06-30 Gass Stephen F. Brake cartridges and mounting systems for brake cartridges
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
US20060042441A1 (en) * 2004-08-31 2006-03-02 Makita Corporation Kickback-inhibiting devices for cutting devices
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
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
US20080078471A1 (en) * 2006-09-28 2008-04-03 Eastway Fair Company Limited Fence assembly with articulating bit guard
US20090314148A1 (en) * 2008-06-20 2009-12-24 Gass Stephen F Table saw blade guards and blade guard assemblies including lateral blade guards, and table saws including the same
US20100037740A1 (en) * 2008-08-18 2010-02-18 Kun-Yen Lin Dust Control Hood Assembly for a Cutting Machine
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
US8082825B2 (en) 2009-06-09 2011-12-27 Butler David J Health and safety system for a table saw
US8082826B2 (en) 2008-03-25 2011-12-27 Power Tool Institute Saw accessories and clamp for use therewith
US8091456B2 (en) 2008-03-25 2012-01-10 Power Tool Institute Safety devices for saws
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
DE102017111070A1 (en) * 2017-05-22 2018-11-22 Festool Gmbh Protective cover for a saw and saw equipped therewith

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US4418597A (en) * 1982-01-18 1983-12-06 Emerson Electric Co. Anti-kickback device
DE9406662U1 (en) * 1994-04-21 1994-07-21 Avola Maschinenfabrik A Volken Moving protective device for table saws
US9969014B2 (en) 1999-10-01 2018-05-15 Sawstop Holding Llc Power equipment with detection and reaction systems
US7347131B2 (en) 1999-10-01 2008-03-25 Sd3, Llc Miter saw with improved safety system
US7525055B2 (en) 1999-10-01 2009-04-28 Sd3, Llc Switch box for power tools with safety systems
US7788999B2 (en) 1999-10-01 2010-09-07 Sd3, Llc Brake mechanism for power equipment
US20060000337A1 (en) * 1999-10-01 2006-01-05 Gass Stephen F Band saw with safety system
US7895927B2 (en) 1999-10-01 2011-03-01 Sd3, Llc Power equipment with detection and reaction systems
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US10335972B2 (en) 1999-10-01 2019-07-02 Sawstop Holding Llc Table Saws
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US9038515B2 (en) 2000-08-14 2015-05-26 Sd3, Llc Logic control for fast-acting safety system
US20020017182A1 (en) * 2000-08-14 2002-02-14 Gass Stephen F. Brake positioning system
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
US20020020271A1 (en) * 2000-08-14 2002-02-21 Gass Stephen F. Spring-biased brake mechanism for power equipment
US8191450B2 (en) 2000-08-14 2012-06-05 Sd3, Llc Power equipment with detection and reaction systems
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US20020017175A1 (en) * 2000-08-14 2002-02-14 Gass Stephen F. Translation stop for use in power equipment
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