U.S. patent number 3,910,146 [Application Number 05/517,927] was granted by the patent office on 1975-10-07 for guide for saber saw.
Invention is credited to William L. Earl.
United States Patent |
3,910,146 |
Earl |
October 7, 1975 |
Guide for saber saw
Abstract
An elongated rectangular magnetic bar has a slot extending
longitudinally in one major surface. A C clamp has a head engagable
with the slot. A pair of pointer elements are used, each element
being elongated with a point at one end and a flat base plate at
the other end, the point extending in a direction perpendicular to
the plate. A pair of flat magnets are used, each magnet being
disposed on and secured to the corresponding plate.
Inventors: |
Earl; William L. (King of
Prussia, PA) |
Family
ID: |
24061818 |
Appl.
No.: |
05/517,927 |
Filed: |
October 25, 1974 |
Current U.S.
Class: |
83/745; 83/471.2;
83/761 |
Current CPC
Class: |
B23Q
17/2233 (20130101); Y10T 83/7693 (20150401); Y10T
83/68 (20150401); Y10T 83/6945 (20150401) |
Current International
Class: |
B23Q
17/22 (20060101); B26D 007/26 (); B26D
005/00 () |
Field of
Search: |
;83/761,441.1,454,821,829,471.2,745,743,486 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Abercrombie; Willie G.
Claims
I claim:
1. A guide for use with a saber saw, said guide comprising:
An elongated rectangular magnetic bar having a longitudinally
extending slot disposed in one major surface;
A C clamp having a head engagable with said slot;
a pair of pointer elements, each element being elongated with a
point at one end and a flat base plate at the other end, the point
extending in a direction perpendicular to the plate; and
a pair of flat magnets, each magnet being disposed on and secured
to the corresponding plate.
2. The guide of claim 1 wherein each pointer element is manually
adjustable in length.
3. The guide of claim 2 wherein said slot in cross section defines
an inverted T.
4. The guide of claim 3 wherein each element includes two members
having overlapping longitudinal slots and slidable relative to each
other, the element further including manually operable locking
means extending through the aligned slots.
Description
SUMMARY OF THE INVENTION
Saber saws are often used to cut thin sheets of plywood and other
materials. Since the thin saber saw blade is disposed in the middle
of a relatively wide saw body, it is difficult for the user to hold
the saw in proper position for an accurate line of cut during the
cutting process.
This invention is directed toward a device which can be used as a
guide for a saber saw whereby when the device is used, an accurate
line of cut is always obtained with ease.
In accordance with the invention, a pair of pointer elements are
detachably secured by magnetic action to one side of an elongated
rectangular metal bar. The elements extend in parallel spaced
position outward at right angles to the side of the bar. The
elements are adjustable in length and are set to a length equal to
the distance in the saw between the center of the blade and either
side of the saw body.
The line to be cut is then drawn on the sheet or other item to be
cut. The bar is placed on the work and moved until the tips of the
elements are aligned with the line. A C clamp is then used to clamp
the bar to the work, the head of the clamp engaging the slot in the
bar. The pointer elements are then removed.
The saber saw is then placed in operation, the user holding the
body of the saw against the side of the bar from which the pointers
had previously been removed.
As a consequence, the line of cut is automatically maintained
easily at all times.
BRIEF DESCRIPTION OF THE DRAWINGS
In the drawings:
FIG. 1 is a perspective view of the invention as assembled;
FIG. 2 is a side view of the structure of FIG. 1; and
FIG. 3 is a detail view of a pointer element.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
Referring now to FIGS. 1-3, a rectangular elongated bar 10 of
magnetic material such as steel has a slot 12 extending
longitudinally along one major surface. The slot in cross section
has the shapes of a T. A conventional C clamp 14 has a head 16
slidably engageable with the slot.
Two pointer elements are used. Each element has a grooved pointed
member 18 with a central longitudinal slot and a right angle
bracket 20 having a body portion slidable in the groove with a slot
aligned with the member slot. Locking bolts 22 or the like can be
used to set the overall length of each element as previously
described by locking the member and angle together at desired
overall length (which is the distance L between the center of the
saw blade 26 of saber saw 24 and one side 28 of the saw). The
exposed right angle end of the bracket carries a flat magnet
30.
The invention can then be used as previously described.
While the invention has been described with detailed reference to
the drawings, the protection sought is to be limited only by the
terms of the claims which follow.
* * * * *