US113042A - Improvement in scroll-saws - Google Patents

Improvement in scroll-saws Download PDF

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Publication number
US113042A
US113042A US113042DA US113042A US 113042 A US113042 A US 113042A US 113042D A US113042D A US 113042DA US 113042 A US113042 A US 113042A
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Prior art keywords
saw
saws
scroll
improvement
fulcrum
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Expired - Lifetime
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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
    • B23D49/00—Machines or devices for sawing with straight reciprocating saw blades, e.g. hacksaws
    • B23D49/007—Jig saws, i.e. machine saws with a vertically reciprocating narrow saw blade chucked at both ends for contour cutting
    • 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
    • Y10T83/687—By tool reciprocable along elongated edge
    • Y10T83/705—With means to support tool at opposite ends
    • Y10T83/7055—And apply drive force to both ends of tool

Definitions

  • This invention consists in novel means of hanging, straining, and operating a gig-saw, whereby a positive motion is provided for, and itis enabled to be driven more rapidly than when its motion in one direction is produced by a spring.
  • Figure 1 is a front elevation of a gig-saw constructed according to my invention
  • Fig. 2 is a transverse section of the same.
  • A is the saw, which works through a table
  • W is a beam, whose fulcrum or center p is provided on a verticallyarranged post, I, which is fitted to slide in bearings M on the upper portion of the said frame F, but is stationary during the operation of the saw.
  • the beam is connected at one end with the block C by a rod, J, which is attached to the said block in such manner as to turn freely therein.
  • This rod has a screw-thread formed on its upper part, which operates within a rocking nut, n, in the said end of the beam, the other end of which is connected, by a wirerope or rod, H, and strap P', with a crank, G, on one end of the horizontal driving-shaft S, which is arranged below the saw, parallel with the plane of motion of the beam W.
  • the post I has pivoted to it the forward end of a lever, L, the fulcrum of -which is on the frame F, and by which the said post is operated to change the fulcrum of the walkingbeam, its handle or outer end being fitted into and held by a notch in a post, j', provided therefor on the frame.
  • a strap, P which connects with a crank, M, which is arranged on the opposite end of the driving-shaft S in exactly the reverse position to that in which the other crank, G, is arranged, so that when one is up the other is down, and vice versa.
  • the drivin g-shaft S is supported in suitable bearings b b, between which the said shaft is provided with a pulley, T, through which power is transmitted to the shaft.
  • the saw is strained by adjusting the screwrod J within the rocking nut n in the walkingbeam, and by raising thel fulcrum p of the beam by means of the lever L.
  • the saw is then operated with a positive motion by the cranks M and G, the one, M, producing-the downward or cutting stroke, and the other, G, by means of the walking-beam W, producing the upward or return stroke, thereby enabling it to be worked at a much greater speed than when a spring is used to raise it.
  • the saw When not in operation the saw mayinstantly be freed of strain by removing the handle of the lever L from the notch in the post f, and lowering the fulcrum of the walking-beam W.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Golf Clubs (AREA)

Description

UNITED STATES PATENT OEEICE WILLIAM GARDNER, OF GLEN GARDNER STATION, (CLARKSVILLE P. 0.,)
NEW JERSEY.
IMPROVEMENT IN SCROLL-SAWS.
Specification forming part of Letters Patent No. 113,042, dated March 28, 1871.
To all whom it may concern:
Be it known that I, WILLIAM GARDNER, of Glen Gardner Station, (Clarksville P. 0.,) in the county of Hunterdon and State of New Jersey, have invented new and useful Improvements in Gig-Saws; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawing, forming a part of this specification.
This invention consists in novel means of hanging, straining, and operating a gig-saw, whereby a positive motion is provided for, and itis enabled to be driven more rapidly than when its motion in one direction is produced by a spring.
ln the accompanying drawing, Figure 1 is a front elevation of a gig-saw constructed according to my invention, and Fig. 2 is a transverse section of the same.
Similar letters of reference indicate corresponding parts in both figures.
A is the saw, which works through a table,
. B, and is buckled at its ends to blocks C D,
that slide in guides c c and d d on a stationary frame, F.
W is a beam, whose fulcrum or center p is provided on a verticallyarranged post, I, which is fitted to slide in bearings M on the upper portion of the said frame F, but is stationary during the operation of the saw.
The beam is connected at one end with the block C by a rod, J, which is attached to the said block in such manner as to turn freely therein. This rod has a screw-thread formed on its upper part, which operates within a rocking nut, n, in the said end of the beam, the other end of which is connected, by a wirerope or rod, H, and strap P', with a crank, G, on one end of the horizontal driving-shaft S, which is arranged below the saw, parallel with the plane of motion of the beam W.
The post Ihas pivoted to it the forward end of a lever, L, the fulcrum of -which is on the frame F, and by which the said post is operated to change the fulcrum of the walkingbeam, its handle or outer end being fitted into and held by a notch in a post, j', provided therefor on the frame.
To the lower block, D, to which the saw is buckled, there is attached a strap, P, which connects with a crank, M, which is arranged on the opposite end of the driving-shaft S in exactly the reverse position to that in which the other crank, G, is arranged, so that when one is up the other is down, and vice versa.
The drivin g-shaft S is supported in suitable bearings b b, between which the said shaft is provided with a pulley, T, through which power is transmitted to the shaft.
The saw is strained by adjusting the screwrod J within the rocking nut n in the walkingbeam, and by raising thel fulcrum p of the beam by means of the lever L. The saw is then operated with a positive motion by the cranks M and G, the one, M, producing-the downward or cutting stroke, and the other, G, by means of the walking-beam W, producing the upward or return stroke, thereby enabling it to be worked at a much greater speed than when a spring is used to raise it.
When not in operation the saw mayinstantly be freed of strain by removing the handle of the lever L from the notch in the post f, and lowering the fulcrum of the walking-beam W.
What I claim as my invention, and desire to secure by Letters Patent, is-
The iexible connections P and P', arranged to operate the saw through `medium of the walking-beam W, as shown and described.
WM. GARDNER. Witnesses: Y
FRED. HAYNEs, U. J. TUsKA.
US113042D Improvement in scroll-saws Expired - Lifetime US113042A (en)

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