US1040832A - Handsaw. - Google Patents

Handsaw. Download PDF

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Publication number
US1040832A
US1040832A US66333411A US1911663334A US1040832A US 1040832 A US1040832 A US 1040832A US 66333411 A US66333411 A US 66333411A US 1911663334 A US1911663334 A US 1911663334A US 1040832 A US1040832 A US 1040832A
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United States
Prior art keywords
blade
arm
frame
stud
lever
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Expired - Lifetime
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US66333411A
Inventor
Joseph Wood
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Individual
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Individual
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Priority to US66333411A priority Critical patent/US1040832A/en
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Publication of US1040832A publication Critical patent/US1040832A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D51/00—Sawing machines or sawing devices working with straight blades, characterised only by constructional features of particular parts; Carrying or attaching means for tools, covered by this subclass, which are connected to a carrier at both ends
    • B23D51/08—Sawing machines or sawing devices working with straight blades, characterised only by constructional features of particular parts; Carrying or attaching means for tools, covered by this subclass, which are connected to a carrier at both ends of devices for mounting straight saw blades or other tools
    • B23D51/12—Sawing machines or sawing devices working with straight blades, characterised only by constructional features of particular parts; Carrying or attaching means for tools, covered by this subclass, which are connected to a carrier at both ends of devices for mounting straight saw blades or other tools for use with tools, dealt with in this subclass, which are connected to a carrier at both ends, e.g. bows adjustable in length or height
    • B23D51/125—Blade tensioning means

Definitions

  • This invention relates chiefly tohand saws employed by butchers for cutting meat, and it has for its object to provide improved means for detachably connecting the frame and blade of the saw, the said means being adapted to prevent the blade from rattling when in use.
  • Figure 1 represents a side View of a saw embodying my invention, parts of the frame and blade being broken away;
  • Fig. 2 represents a section on line 22 of Fig. 1;
  • Fig. 3 represents a section on line 3-3 of Fig. 1;
  • Fig. 4 represents a section on line 41-4L of Fig. 1;
  • Fig. 5 represents a section on line 55 of Fig. 1.
  • --12 represents the back of the saw frame on which are formed an inner arm 13 and an outer arm 14, said back and arms being integral with each other and the frame formed thereby being resilient so that the arms may be forced slightly inward toward each other, and when so forced have a tendency to spring apart.
  • the inner arm 18 is longer than the outer arm and has a blade-receiving slot 15 (Fig. 2) and an inner blade-engaging stud 16 extending through said slot.
  • a lever having a shorter arm 18 projecting below the fulcrum 17 and below the outer end of the outer arm, and a longer arm 18 projecting above the fulcrum, the lever being provided with an ear 18 entering a slot in the arm 14 and receiving the fulcrum 17.
  • the shorter arm 18 is provided with a blade-receiving slot 19 (Fig. 3) and with an outer bladeengaging stud 20 extending through said slot.
  • 21 represents the saw blade, which is provided in the outer end portions of its back with oppositely inclined notches 21, 21.
  • a movable detent or latch which, as here shown, is a U-shaped metal strip formed to bestride the lever arm 18 and outer frame arm 14, the ends of said strip being connected by a pivot 23 with the inner portion of the frame arm.
  • Vhen the detent is moved to the position shown by full lines, Fig. 1, it holds the lever arm 18 against the frame arm 141-, and thus holds the outer stud 20 at its maximum separation from the inner stud 16, so that said studs are caused to press in opposite directions on the inner ends of the blade notches 21 and lock the blade in its operative position.
  • the detent is moved to the position shown by dotted lines, itpermits the outer stud 20 to move toward the inner stud 16 and thus unlock or release the blade and permit its removal.
  • the inner notch 21 is first applied to the inner stud 16, and, the lever being free, the outer end of the blade is swung upwardly until its outer notch 21 receives the outer stud 20.
  • the longer arm of the lever is then forced inwardly against the frame arm 14 and secured by the detent 22, this operation moving the stud 20 away from the stud 16, and springing the arms 13 and 1 1- slightly toward each other.
  • the superior length of the lever arm 18 enables the muscular force of the operator to be exerted advantageously in moving the lever to secure the blade.
  • the lever arm 18" is provided with a slight protuberance 18 which engages the detent 22 suiliciently to prevent accidental displacement thereof from the position shown by full lines.
  • the pull exerted by the strained blade 21 tends to hold the said protuberance in engagement with the de tent, the lever arm 18 being adapted to be pressed inwardly toward the frame arm 14: by the operator, suflicieutly to permit the upward displacement of the detent.
  • the slots 15 and 19 in the lever arm 18 and frame arm 13 are preferably arranged obliquely, as shown by Fig. 5, so that portions of the blade inserted in said slots are deflected from the plane of the main portion of the blade and hear so forcibly against opposite sides of the slots that chattering flect the portions of the blade inserted or rattling of the blade is prevented.
  • the blade, and means for engaging and strain- witnesseses ing the blade, the blade-receiving slots be- C. F. BROWN, ing obliquely arranged and adapted tbde- P. W. PEZZETTI.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sawing (AREA)

Description

J. WOOD.
HANDSAW.
APPLICATION IILED DBO.1, 1911.
1,040,832. Patented 0013.8,1912.
f l l I l \N I \I am *8 v COLUMBIA ILANOURAPH to. WASHINGTON, n. C
UE SATES PATENT @FFICE.
JOSEPH WOOD, 0F EVERETT, MASSACHUSETTS.
HANDSAW.
To all whom it may concern:
Be it known that I, Josnrn 001), a citizen of the United States, and a resident of Everett, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in Hand saws, of which the following is a specification.
This invention relates chiefly tohand saws employed by butchers for cutting meat, and it has for its object to provide improved means for detachably connecting the frame and blade of the saw, the said means being adapted to prevent the blade from rattling when in use.
The invention consists in the improvements which I will now proceed to describe and claim.
Of the accompanying drawings which form a part of this specification,Figure 1 represents a side View of a saw embodying my invention, parts of the frame and blade being broken away; Fig. 2 represents a section on line 22 of Fig. 1; Fig. 3 represents a section on line 3-3 of Fig. 1; Fig. 4 represents a section on line 41-4L of Fig. 1; Fig. 5 represents a section on line 55 of Fig. 1.
Similar reference characters indicate the same or similar parts in all the figures.
In the drawings,--12 represents the back of the saw frame on which are formed an inner arm 13 and an outer arm 14, said back and arms being integral with each other and the frame formed thereby being resilient so that the arms may be forced slightly inward toward each other, and when so forced have a tendency to spring apart. The inner arm 18 is longer than the outer arm and has a blade-receiving slot 15 (Fig. 2) and an inner blade-engaging stud 16 extending through said slot. To the outer end portion of the outer arm 14 is fulcrumed or pivoted at 17 a lever having a shorter arm 18 projecting below the fulcrum 17 and below the outer end of the outer arm, and a longer arm 18 projecting above the fulcrum, the lever being provided with an ear 18 entering a slot in the arm 14 and receiving the fulcrum 17. The shorter arm 18 is provided with a blade-receiving slot 19 (Fig. 3) and with an outer bladeengaging stud 20 extending through said slot.
Specification of Letters Patent.
Application filed December 1, 1911.
Patented Oct. 8, 1912.
Serial No. 663,334.
21 represents the saw blade, which is provided in the outer end portions of its back with oppositely inclined notches 21, 21.
22 represents a movable detent or latch which, as here shown, is a U-shaped metal strip formed to bestride the lever arm 18 and outer frame arm 14, the ends of said strip being connected by a pivot 23 with the inner portion of the frame arm. Vhen the detent is moved to the position shown by full lines, Fig. 1, it holds the lever arm 18 against the frame arm 141-, and thus holds the outer stud 20 at its maximum separation from the inner stud 16, so that said studs are caused to press in opposite directions on the inner ends of the blade notches 21 and lock the blade in its operative position. lVhen the detent is moved to the position shown by dotted lines, itpermits the outer stud 20 to move toward the inner stud 16 and thus unlock or release the blade and permit its removal.
In applying the blade to the frame, the inner notch 21 is first applied to the inner stud 16, and, the lever being free, the outer end of the blade is swung upwardly until its outer notch 21 receives the outer stud 20. The longer arm of the lever is then forced inwardly against the frame arm 14 and secured by the detent 22, this operation moving the stud 20 away from the stud 16, and springing the arms 13 and 1 1- slightly toward each other. The superior length of the lever arm 18 enables the muscular force of the operator to be exerted advantageously in moving the lever to secure the blade. The lever arm 18" is provided with a slight protuberance 18 which engages the detent 22 suiliciently to prevent accidental displacement thereof from the position shown by full lines. The pull exerted by the strained blade 21 tends to hold the said protuberance in engagement with the de tent, the lever arm 18 being adapted to be pressed inwardly toward the frame arm 14: by the operator, suflicieutly to permit the upward displacement of the detent. The slots 15 and 19 in the lever arm 18 and frame arm 13 are preferably arranged obliquely, as shown by Fig. 5, so that portions of the blade inserted in said slots are deflected from the plane of the main portion of the blade and hear so forcibly against opposite sides of the slots that chattering flect the portions of the blade inserted or rattling of the blade is prevented. I V therein. 10 l I claim: In testimony whereof I have aflixed my A saw frame, having slotted arms adaptsignature, in presence of tWo Witnesses. 5 ed to receive the end portions of a saw JOSEPH WOOD.
blade, and means for engaging and strain- Witnesses: ing the blade, the blade-receiving slots be- C. F. BROWN, ing obliquely arranged and adapted tbde- P. W. PEZZETTI.
Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. C.
US66333411A 1911-12-01 1911-12-01 Handsaw. Expired - Lifetime US1040832A (en)

Priority Applications (1)

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US66333411A US1040832A (en) 1911-12-01 1911-12-01 Handsaw.

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US66333411A US1040832A (en) 1911-12-01 1911-12-01 Handsaw.

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2817899A (en) * 1956-09-26 1957-12-31 Sidney W Wheeler Pruning saw
US4376456A (en) * 1981-03-26 1983-03-15 Great Neck Saw Manufacturers, Inc. Hack saw frame

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2817899A (en) * 1956-09-26 1957-12-31 Sidney W Wheeler Pruning saw
US4376456A (en) * 1981-03-26 1983-03-15 Great Neck Saw Manufacturers, Inc. Hack saw frame

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