US2434174A - Safety brake for band-saw blades - Google Patents
Safety brake for band-saw blades Download PDFInfo
- Publication number
- US2434174A US2434174A US54107144A US2434174A US 2434174 A US2434174 A US 2434174A US 54107144 A US54107144 A US 54107144A US 2434174 A US2434174 A US 2434174A
- Authority
- US
- United States
- Prior art keywords
- blade
- band
- safety brake
- saw blades
- wedge
- 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
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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
- B27G19/06—Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws for band or strap saws
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
- B27B13/00—Band or strap sawing machines; Components or equipment therefor
- B27B13/14—Braking devices specially designed for band sawing machines, e.g. acting after damage of the band saw blade
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D59/00—Self-acting brakes, e.g. coming into operation at a predetermined speed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16P—SAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
- F16P7/00—Emergency devices preventing damage to a machine or apparatus
- F16P7/02—Emergency devices preventing damage to a machine or apparatus by causing the machine to stop on the occurrence of dangerous conditions therein
-
- 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
- Y10T83/081—With randomly actuated stopping means
- Y10T83/088—Responsive to tool detector or work-feed-means detector
- Y10T83/089—Responsive to tool characteristic
Definitions
- the present invention relates to new and useful improvements in band saw machines and has for its primary object to provide, in a manner as hereinafter set forth, novel means controlled by the blade, for automatically stopping and firmly holding said blade in the event that it should break or become too loose.
- Figure 1 is a view in side elevation of an automatic safety brake constructed in accordance with the present invention, showing the device in position on a band saw machine.
- Figure 2 is a view in horizontal section, taken substantially on the line 22 of Figure 1.
- Figure 3 is a perspective view of the device removed from the band saw machine.
- the embodiment of the invention which has been illustrated comprises an arcuate lever l of suitable metal.
- the lever l is pivotally secured at 2 for vertical swinging movement in the guard or housing 3 of a conventional band saw machine 4 adjacent one side of the front run of the endless blade 5 and above the usual pair of guide rollers 6 for said blade.
- a shaft 1 Mounted horizontally on the upper end portion of the lever l is a shaft 1. Journaled on the shaft 1 is a roller 3 of felt, fiber, or other suitable material which is adapted to ride on the endless blade 5.
- a pull spring 9 has one end connected to the housing 3 and its other end connected to the upper portion of the lever l for engaging the roller 8 with the blade 5.
- a brake for band saw machines of the type having a housing, a pair of guide rollers in said housing and an endless blade operable between said rollers, comprising a wedge movably mounted on said housing and engageable-in braking relation between the blade and one of said guide rollers, resilient means biasing said wedge into braking position, and a restraining member for preventing operation of said resilient means, said restraining member including a portion bearing against said blade during normal tensioning thereof.
- a brake for band saw machines of the type having ahousing, a pairof guide rollers in said housing and en endless blade operable between said rollers, comprising a Wedge movably mounted on said housing and engageable in braking relation between the blade and one of said guide rollers, resilient means biasing said wedge into braking position, and a restraining member for preventing operation of said resilient means, said restraining member including a portion bearing against said blade during normal tensioning thereof, said restraining member further including a lever having the fulcrum intermediate its ends and one end supporting said wedge and its other end supporting a roller bearing against said blade.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Sawing (AREA)
Description
Jan. 6, 1948. J. P. MORGAN SAFETY BRAKE FOR BAND SAW BLADES Filed June 19, 1944 Inventor JOSEPH P MORGAN,
and
Wave 13m Patented Jan. 6, 1948 UNITED STATES PATENT OFFICE SAFETY BRAKE FOR BAND-SAW BLADES Joseph P. Morgan, New Castle, Pa.
Application June 19, 1944, Serial N 0. 541,071
, 2 Claims. 1
The present invention relates to new and useful improvements in band saw machines and has for its primary object to provide, in a manner as hereinafter set forth, novel means controlled by the blade, for automatically stopping and firmly holding said blade in the event that it should break or become too loose.
Other objects of the invention are to provide an automatic safety brake of the aforementioned character for band saw blades which will be comparatively simple in construction, strong, durable, reliable, and which may be manufactured at low cost.
All of the foregoing, and still further objects and advantages of the invention will become apparent from a study of the following specification, taken in connection with the accompanying drawing wherein like characters of reference designate corresponding parts throughout the several views, and wherein:
Figure 1 is a view in side elevation of an automatic safety brake constructed in accordance with the present invention, showing the device in position on a band saw machine.
Figure 2 is a view in horizontal section, taken substantially on the line 22 of Figure 1.
Figure 3 is a perspective view of the device removed from the band saw machine.
Referring now to the drawing in detail, it will be seen that the embodiment of the invention which has been illustrated comprises an arcuate lever l of suitable metal. The lever l is pivotally secured at 2 for vertical swinging movement in the guard or housing 3 of a conventional band saw machine 4 adjacent one side of the front run of the endless blade 5 and above the usual pair of guide rollers 6 for said blade.
Mounted horizontally on the upper end portion of the lever l is a shaft 1. Journaled on the shaft 1 is a roller 3 of felt, fiber, or other suitable material which is adapted to ride on the endless blade 5. A pull spring 9 has one end connected to the housing 3 and its other end connected to the upper portion of the lever l for engaging the roller 8 with the blade 5.
Mounted on the lower end portion of the lever l is a laterally projecting threaded shank Ill. A wedge ll adjustable in any conventional manner is mounted on the shank l0.
It is thought that the operation of the device will be readily apparent from a consideration of the foregoing. As illustrated to advantage in Figure 1 of the drawing, the roller 8 rides on the front of the blade 5 and a wedge II is positioned adjacent the back of said blade and directed between said blade and the rear guide roller 6. Thus, as long as the blade 5 is functioning under the correct tension the wedge H is held in raised or inoperative position. However, should the blade 5 break or shoud there be too much slack therein, the spring 9 actuates the lever l in a direction to engage the wedge l 1 between the band 5 and the rear guide roller 6. In this manner the blade 5 is arrested and firmly held, thereby preventing further damage to the machine and protecting the operator against injury.
It is believed that a safety brake for band saw blades constructed in accordance with the present invention Will be readily understood, and although a preferred embodiment of the device is as illustrated and described, it is to be understood that changes in the details of construction may be resorted to which will fall within the scope of the invention as claimed.
What I claim is:
1. A brake for band saw machines of the type having a housing, a pair of guide rollers in said housing and an endless blade operable between said rollers, comprising a wedge movably mounted on said housing and engageable-in braking relation between the blade and one of said guide rollers, resilient means biasing said wedge into braking position, and a restraining member for preventing operation of said resilient means, said restraining member including a portion bearing against said blade during normal tensioning thereof.
2. A brake for band saw machines of the type having ahousing, a pairof guide rollers in said housing and en endless blade operable between said rollers, comprising a Wedge movably mounted on said housing and engageable in braking relation between the blade and one of said guide rollers, resilient means biasing said wedge into braking position, and a restraining member for preventing operation of said resilient means, said restraining member including a portion bearing against said blade during normal tensioning thereof, said restraining member further including a lever having the fulcrum intermediate its ends and one end supporting said wedge and its other end supporting a roller bearing against said blade.
JOSEPH P. MORGAN.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date 1,757,785 Sullenberger May 6, 1930 2,286,589 Tonnewitz June 16, 1942
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US54107144 US2434174A (en) | 1944-06-19 | 1944-06-19 | Safety brake for band-saw blades |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US54107144 US2434174A (en) | 1944-06-19 | 1944-06-19 | Safety brake for band-saw blades |
Publications (1)
Publication Number | Publication Date |
---|---|
US2434174A true US2434174A (en) | 1948-01-06 |
Family
ID=24158073
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US54107144 Expired - Lifetime US2434174A (en) | 1944-06-19 | 1944-06-19 | Safety brake for band-saw blades |
Country Status (1)
Country | Link |
---|---|
US (1) | US2434174A (en) |
Cited By (63)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3485327A (en) * | 1967-10-20 | 1969-12-23 | Mcculloch Corp | Inertia actuated safety brake |
US3485326A (en) * | 1967-10-20 | 1969-12-23 | Mcculloch Corp | Magnetic stopping device |
US4463638A (en) * | 1982-02-18 | 1984-08-07 | Fortin Romeo G | Band saw |
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 |
US20020017179A1 (en) * | 2000-08-14 | 2002-02-14 | Gass Stephen F. | Miter saw with improved safety system |
US20020017183A1 (en) * | 2000-08-14 | 2002-02-14 | Gass Stephen F. | Cutting tool 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 |
US20020056348A1 (en) * | 2000-09-29 | 2002-05-16 | Gass Stephen F. | Miter saw with improved 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 |
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 |
US20030005588A1 (en) * | 2001-07-03 | 2003-01-09 | Gass Stephen F. | Actuators for use in fast-acting safety systems |
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 |
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 |
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 |
US20040163514A1 (en) * | 2001-08-13 | 2004-08-26 | Gass Stephen F. | Safety systems for power equipment |
US20040173430A1 (en) * | 2003-03-05 | 2004-09-09 | Gass Stephen F. | Retraction system and motor position for use with safety systems for power equipment |
US6826988B2 (en) | 2000-09-29 | 2004-12-07 | Sd3, Llc | 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 |
US20050039822A1 (en) * | 2003-08-20 | 2005-02-24 | Gass Stephen F. | Woodworking machines with overmolded arbors |
US20050066784A1 (en) * | 2000-09-29 | 2005-03-31 | Gass Stephen F. | Safety methods for use in power equipment |
US20050139056A1 (en) * | 2003-12-31 | 2005-06-30 | Gass Stephen F. | Fences for table saws |
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 |
US20050166736A1 (en) * | 2004-01-29 | 2005-08-04 | Gass Stephen F. | Table saws with safety systems and systems to mount and index attachments |
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 |
US6957601B2 (en) | 2000-08-14 | 2005-10-25 | Sd3, Llc | Translation stop for use in power equipment |
US7024975B2 (en) | 2000-08-14 | 2006-04-11 | Sd3, Llc | Brake mechanism for power equipment |
US7055417B1 (en) | 1999-10-01 | 2006-06-06 | Sd3, Llc | Safety system for power equipment |
US20060230896A1 (en) * | 1999-10-01 | 2006-10-19 | Gass Stephen F | Miter saw with improved safety system |
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 |
US7197969B2 (en) | 2001-09-24 | 2007-04-03 | Sd3, Llc | Logic control with test mode for fast-acting safety system |
US20070101842A1 (en) * | 2003-08-20 | 2007-05-10 | Gass Stephen F | Woodworking machines with overmolded arbors |
US7231856B2 (en) | 2001-06-13 | 2007-06-19 | Sd3, Llc | Apparatus and method for detecting dangerous conditions in 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 |
US7377199B2 (en) | 2000-09-29 | 2008-05-27 | Sd3, Llc | Contact detection system for power equipment |
US7481140B2 (en) | 2005-04-15 | 2009-01-27 | Sd3, Llc | Detection systems for power equipment |
US7509899B2 (en) | 2000-08-14 | 2009-03-31 | Sd3, Llc | Retraction system for use in power equipment |
US7600455B2 (en) | 2000-08-14 | 2009-10-13 | Sd3, Llc | Logic control for fast-acting safety system |
US7610836B2 (en) | 2000-08-14 | 2009-11-03 | Sd3, Llc | Replaceable brake mechanism for power equipment |
US7644645B2 (en) | 2002-01-16 | 2010-01-12 | Sd3, Llc | Apparatus and method for detecting dangerous conditions in power equipment |
US8065943B2 (en) | 2000-09-18 | 2011-11-29 | Sd3, Llc | Translation stop for use in power equipment |
CN103522367A (en) * | 2013-10-29 | 2014-01-22 | 侯如升 | Vertical wood cutting saw |
US20160297094A1 (en) * | 2015-04-07 | 2016-10-13 | King Saw Machinery Ltd. | Band Saw Machine with Disk Brake Device |
US9724840B2 (en) | 1999-10-01 | 2017-08-08 | Sd3, Llc | Safety systems 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 |
US11098849B2 (en) | 2016-05-31 | 2021-08-24 | Sawstop Holding Llc | Detection systems for power tools with active injury mitigation technology |
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US1757785A (en) * | 1928-06-02 | 1930-05-06 | Charles E Sullenberger | Band sawing machine |
US2286589A (en) * | 1940-10-28 | 1942-06-16 | Carl E Tannewitz | Blade grabber for band saws |
-
1944
- 1944-06-19 US US54107144 patent/US2434174A/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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US1757785A (en) * | 1928-06-02 | 1930-05-06 | Charles E Sullenberger | Band sawing machine |
US2286589A (en) * | 1940-10-28 | 1942-06-16 | Carl E Tannewitz | Blade grabber for band saws |
Cited By (157)
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---|---|---|---|---|
US3485327A (en) * | 1967-10-20 | 1969-12-23 | Mcculloch Corp | Inertia actuated safety brake |
US3485326A (en) * | 1967-10-20 | 1969-12-23 | Mcculloch Corp | Magnetic stopping device |
US4463638A (en) * | 1982-02-18 | 1984-08-07 | Fortin Romeo G | Band saw |
US20100236663A1 (en) * | 1999-10-01 | 2010-09-23 | Gass Stephen F | Power equipment with detection and reaction systems |
US20100213018A1 (en) * | 1999-10-01 | 2010-08-26 | Gass Stephen F | Brake mechanism for power equipment |
US9925683B2 (en) | 1999-10-01 | 2018-03-27 | Sawstop Holding Llc | Table saws |
US9724840B2 (en) | 1999-10-01 | 2017-08-08 | Sd3, Llc | Safety systems for power equipment |
US9522476B2 (en) | 1999-10-01 | 2016-12-20 | Sd3, Llc | Power equipment with detection and reaction systems |
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US20080092702A1 (en) * | 2000-08-14 | 2008-04-24 | Gass Stephen F | Spring-biased brake mechanism for power equipment |
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US7350444B2 (en) | 2000-08-14 | 2008-04-01 | Sd3, Llc | Table saw with improved safety system |
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US7024975B2 (en) | 2000-08-14 | 2006-04-11 | Sd3, Llc | Brake mechanism for power equipment |
US20100089212A1 (en) * | 2000-08-14 | 2010-04-15 | Gass Stephen F | Logic control for fast-acting safety system |
US7308843B2 (en) | 2000-08-14 | 2007-12-18 | Sd3, Llc | Spring-biased brake mechanism for power equipment |
US8100039B2 (en) | 2000-08-14 | 2012-01-24 | Sd3, Llc | Miter saw with safety system |
US20070240786A1 (en) * | 2000-08-14 | 2007-10-18 | Gass Stephen F | Motion detecting system for use in a safety system for power equipment |
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