US2125919A - Work holder - Google Patents

Work holder Download PDF

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Publication number
US2125919A
US2125919A US157381A US15738137A US2125919A US 2125919 A US2125919 A US 2125919A US 157381 A US157381 A US 157381A US 15738137 A US15738137 A US 15738137A US 2125919 A US2125919 A US 2125919A
Authority
US
United States
Prior art keywords
cutter
arm
work holder
lever
sheet
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
Application number
US157381A
Inventor
Clarence E Harris
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to US157381A priority Critical patent/US2125919A/en
Application granted granted Critical
Publication of US2125919A publication Critical patent/US2125919A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q35/00—Control systems or devices for copying directly from a pattern or a master model; Devices for use in copying manually
    • B23Q35/04—Control systems or devices for copying directly from a pattern or a master model; Devices for use in copying manually using a feeler or the like travelling along the outline of the pattern, model or drawing; Feelers, patterns, or models therefor
    • B23Q35/08—Means for transforming movement of the feeler or the like into feed movement of tool or work
    • B23Q35/10—Means for transforming movement of the feeler or the like into feed movement of tool or work mechanically only
    • B23Q35/101—Means for transforming movement of the feeler or the like into feed movement of tool or work mechanically only with a pattern composed of one or more lines used simultaneously for one tool
    • B23Q35/105—Means for transforming movement of the feeler or the like into feed movement of tool or work mechanically only with a pattern composed of one or more lines used simultaneously for one tool of two lines
    • B23Q35/106—Means for transforming movement of the feeler or the like into feed movement of tool or work mechanically only with a pattern composed of one or more lines used simultaneously for one tool of two lines with a single tool and two feelers rotating about parallel axis
    • 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
    • B27B25/00—Feeding devices for timber in saw mills or sawing machines; Feeding devices for trees
    • B27B25/02—Feeding devices for timber in saw mills or sawing machines; Feeding devices for trees with feed and pressure rollers
    • 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
    • Y10T83/741—With movable or yieldable guide element
    • Y10T83/743—Opposed to work-supporting surface

Definitions

  • This invention relates to a work holder.
  • the purpose of this invention is to provide a simple, eflicient and adjustable device for holding a thin sheet of material adjacent'to the point of out being made by a circular saw while at the same time serving as a guard for the saw.
  • the invention consists in the construction, arrangement and combination of elements described hereinafter and pointed out in the claim forming a part of this specification.
  • FIG. 1 is a view in side elevation of the work holder forming the subject of this invention.
  • Fig. 2 is a view in'end elevation.
  • Figs. 3 and 4 are sectional views on the corresponding lines of Fig. 1.
  • a. cutter 5 carried by a rotatable shaft 6 and adapted to cut a thin sheet of material I which is carried past the cutter on the plate or support 8.
  • a fixed shaft 9 disposed above the cutter carries an arm Ii] which has a split bearing l I whereby it is securely clamped in position of adjustment by means of a bolt I2.
  • the arm serves as a guard for the cutter and has a slot it for receiving a portion of the cutter.
  • a stud bolt l4 mounted in the lower part of the arm carries a pair of levers I5--i 5 on opposite sides of the arm and the levers are held against removal by means of nuts Iii-l 6.
  • a roller ii is carried on the lower end of each lever by means of a bolt it.
  • the rollers are disposed on opposite sides of the cutter 5 and engage 5 the sheet 1 adjacent the point of the cut being made by the cutter.
  • the levers are held in a position which is substantially at right angles to the arm and which maintains the rollers in engagement with the 10 sheet I by means of set screws l9-l9. These screws are threaded in a plate 20 fixed to the arm it) and each screw carries a nut 2
  • a shaft above the cutter a guard arm carried by the shaft and disposed tangentially to the cutter, said arm having a slot for receiving a portion of the cutter, a pair of levers pivotally mounted on the lower end of the guard arm and disposed on opposite sides of the cutter, a workholding roller on each lever and positioned adjacent the cutting point of the cutter, and a pair of set screws carried by the arm, each set screw engageable with an end face of one lever above the point of pivotal mounting of the lever and holding the lever approximately perpendicular to the guard arm.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Automation & Control Theory (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)

Description

c. E. HARRis WORK HOLDER Aug. 9, 1938.
Filed Aug. 4, 1937 Inventor Clarence E Har r-is Patented Aug. 9, 1938 UNITED STATES PATENT OFFICE 1 Claim.
(Granted under the act of March 3, 1883, as
amended April 30, 1928; 370 O. G. 757) The invention described herein may be manufactured and used by or for the Government for governmental purposes, without the payment to me of any royalty thereon.
This invention relates to a work holder.
The purpose of this invention is to provide a simple, eflicient and adjustable device for holding a thin sheet of material adjacent'to the point of out being made by a circular saw while at the same time serving as a guard for the saw.
To these and other ends, the invention consists in the construction, arrangement and combination of elements described hereinafter and pointed out in the claim forming a part of this specification.
A practical embodiment of the invention is illustrated in the accompanying drawing, where- Fig. 1 is a view in side elevation of the work holder forming the subject of this invention.
Fig. 2 is a view in'end elevation.
Figs. 3 and 4 are sectional views on the corresponding lines of Fig. 1.
Referring to the drawing by characters of reference, there is shown a. cutter 5 carried by a rotatable shaft 6 and adapted to cut a thin sheet of material I which is carried past the cutter on the plate or support 8.
A fixed shaft 9 disposed above the cutter carries an arm Ii] which has a split bearing l I whereby it is securely clamped in position of adjustment by means of a bolt I2. The arm serves as a guard for the cutter and has a slot it for receiving a portion of the cutter. A stud bolt l4 mounted in the lower part of the arm carries a pair of levers I5--i 5 on opposite sides of the arm and the levers are held against removal by means of nuts Iii-l 6.
A roller ii is carried on the lower end of each lever by means of a bolt it. The rollers are disposed on opposite sides of the cutter 5 and engage 5 the sheet 1 adjacent the point of the cut being made by the cutter.
The levers are held in a position which is substantially at right angles to the arm and which maintains the rollers in engagement with the 10 sheet I by means of set screws l9-l9. These screws are threaded in a plate 20 fixed to the arm it) and each screw carries a nut 2| for engaging the plate. The end of each screw engages the upper corner of the corresponding lever and its 15 position of adjustment is so determined that the roller will hold the sheet 1 onto its support and counteract the tendency of the sheet to be raised by the cutter.
I claim:
In combination with a circular cutter, a shaft above the cutter, a guard arm carried by the shaft and disposed tangentially to the cutter, said arm having a slot for receiving a portion of the cutter, a pair of levers pivotally mounted on the lower end of the guard arm and disposed on opposite sides of the cutter, a workholding roller on each lever and positioned adjacent the cutting point of the cutter, and a pair of set screws carried by the arm, each set screw engageable with an end face of one lever above the point of pivotal mounting of the lever and holding the lever approximately perpendicular to the guard arm.
CLARENCE E. HARRIS.
US157381A 1937-08-04 1937-08-04 Work holder Expired - Lifetime US2125919A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US157381A US2125919A (en) 1937-08-04 1937-08-04 Work holder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US157381A US2125919A (en) 1937-08-04 1937-08-04 Work holder

Publications (1)

Publication Number Publication Date
US2125919A true US2125919A (en) 1938-08-09

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Family Applications (1)

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US157381A Expired - Lifetime US2125919A (en) 1937-08-04 1937-08-04 Work holder

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2821220A (en) * 1954-02-01 1958-01-28 Thomas W Nicholson Log feed mechanism
US3213908A (en) * 1963-06-05 1965-10-26 Black & Decker Mfg Co Work hold-down for power-operated panel saw
US4976298A (en) * 1990-05-17 1990-12-11 Leichtung Inc. Anti-kickback hold down device
US5540129A (en) * 1992-01-14 1996-07-30 Robert Bosch Gmbh Anti-splintering device for sawing machines having a saw blade
US20080052921A1 (en) * 2004-09-21 2008-03-06 Stefano Delfini Base Plate for Power Scroll Saw

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2821220A (en) * 1954-02-01 1958-01-28 Thomas W Nicholson Log feed mechanism
US3213908A (en) * 1963-06-05 1965-10-26 Black & Decker Mfg Co Work hold-down for power-operated panel saw
US4976298A (en) * 1990-05-17 1990-12-11 Leichtung Inc. Anti-kickback hold down device
US5540129A (en) * 1992-01-14 1996-07-30 Robert Bosch Gmbh Anti-splintering device for sawing machines having a saw blade
US20080052921A1 (en) * 2004-09-21 2008-03-06 Stefano Delfini Base Plate for Power Scroll Saw

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