US2112432A

US2112432A - Means for gauging saw blades

Info

Publication number: US2112432A
Application number: US142423A
Authority: US
Inventors: William J Baumann
Original assignee: Individual
Current assignee: Individual
Priority date: 1937-05-13
Filing date: 1937-05-13
Publication date: 1938-03-29
Anticipated expiration: 1955-03-29

Description

March 29, 1938. w, J BAUMANN 2,112,432

MEANS FOR GAUGING SAW BLADES FiledMay 13, 1937 IQIIIIIII INVENTOR. WILLIAM J. BAUMAN.

ATTORNEY.

Patented Mar. 29, 1938 UNITED STATES QFFMZE 8 Claims.

This invention relates to new and useful improvements in means for gauging and sharpen ing circular saw blades, such as set saws, hollow ground saws, as well as groover saws, with raker teeth; and it has for its specific purpose to construct a device, whereby the raker or cleaner teeth may easily and quickly be filed down to an exact predetermined height or radius. This height or radius may be 3 2- or of an inch smaller than the height or radius of the ordinary cutting teeth, according to the quality, condition and purpose of the lumber to be out.

As my device will be manufactured in different sizes, it will be made to fit saw blades of any diameter.

With the above and other objects in view, this invention consists of the novel features of: construction, combination and arrangement of parts, hereinafter fully described, claimed and illustrated in the accompanying drawing forming part of this application, and in which similar characters indicate corresponding parts in all views, and in which:

Referring to said drawing:

Figure 1 is a side elevational view of my device in use, showing also part of a saw blade.

Figure 2 is a transverse sectional view of the same, taken on the line 22 in Figure 1.

Figure 3 is an elevational view of a part of my device, the same being viewed from the opposite side, as seen in Figure 1.

Figure 4 is a sectional view on the line 4--l in Figure 3; while the Figures 5 and 6 are detail side elevational 5 and bottom views, respectively, of the adjuster or setter.

Figure '7 shows one of the guiding cars in side elevation; and

Figure 8 is a transverse sectional View of the same, taken on the line B8 in Figure '7.

Figure 9 is a top plan View of my device with parts of same removed, and the adjuster in a different position from the one shown in Figure 1.

Figure 10 is a side elevational view, similar to Figure l, and showing a modification of my device; while Figure ll. is a detail transverse sectional view of said modification, taken on the line H-H in Figure 10.

Figure 12 is a side elevational View; and Figure 13 a bottom view of the screw bolt seen in Figure 11.

Referring more particularly to the drawing, i5

indicates part of an ordinary circular saw blade.

My device It, which is shown in adjusted position to fit said saw blade, consists primarily of a substantially fiat main body ll, to the central portion of which is attached a somewhat U shaped member l8; two adjustable members or 5 guides is, are mounted upon the side-pieces 23 of the body ll, while an angularly shaped setter 20 is arranged on top of the U-shaped member and turnably secured to the latter by means of a screw 2|. 10

The main body ll, which preferably is manuiactured, or made of aluminum, iron casting, or steel, and which may most conveniently be seen in the Figures 1 and consists of a central portion 22 and two side-pieces 23, which latter are 15 formed with oblong slots 24 therein.

It may in this connection be noted that the thickness of the upper portions of the side-pieces 23, and of the upper portion of the central part 22 is slightly reduced, as may especially be seen 20 in the Figures 3 and 4;

The guides proper I9, each consists of a small, rectangular, substantially flat bar 25, which upon its upper side is provided with. a semi-cir cular projection 26 to which is integrally secured 25 a stud 2i, this stud is made to freely slide in the slot 24, while the end 28 of said stud is threaded to fit a wing nut 29.

The setter or adjuster 26 is pivotally mounted upon the U-shaped member I8 by means of a 30 screw 2! and an actuating spring St. The action of said spring may be regulated by the screw it, as the spring serves to hold the setter Zil firmly against the cut-out portion 33 in the member it. The setter has four short legs 34 formed 5 by the cut-out portions 3! and 32 therein; said cut-out portions having respectively the depth of and of an inch, as hereinbefore stated. The legs rest, when the adjustment of the device is made relative to a saw blade, upon the upper 40 surface of the member Iii, or rather upon the bottom of the cut-out portion 33.

It will be noted that in order to arrest the setter proper in definite positions, said setter has in its semi-circular end portion formed two 45 grooves 35 and 36', as may be seen especially in the Figures 5 and 6 said grooves are adapted to engage a small stud 3'! secured to a springleaf 38, which latter in turn is attached to the member it by means of small screws 39. 50

When a saw blade is to be reset and sharpened, the usual method of applying a jointer stone is first resorted to in order to bring all the cutting teeth down to the same level.

In applying my device, the wing nuts 29 are 55 loosened enough to permit the guides It to move freely up and down in the slots 24, so that the raker teeth 4E! may be made to rest against one of the cut-out

portions

35 or 32, as desired, and as seen in Figure 1. While in said position, the guides l8 are arranged to rest, each guide on two of the cutting teeth, as indicated by M; the wing nuts are then next tightened, and the setter 25B is turned sideways in order to permit the small top part of the raker tooth extending above the edge 33 to be filed off, according to the adjustment made.

To facilitate adjustment of the guides, one or more washers may, if desired, be arranged upon the stud 2? for cooperation with the wing nut 29.

By placing, in turn, the device upon each raker tooth, maintaining the guides in the same position, and filing off the portion extending above the edge 33, all raker teeth will be filed down to exactly the same fraction of an inch, or smaller than the cutting teeth.

In View of the reduced thickness of the upper portions of the side-pieces 23 and the upper portion of the central part of the main body II, the outwardly bent teeth on a set saw, and the outer thicker portion of a hollow ground saw may move freely between the two side-walls of the U-shaped member [3, and the upper part of the main body, to which latter one of said side-walls is integrally secured, as shown in Figure 1, without said teeth scraping against the metal. The relative connection between said double walls of the U- shaped member l8, which is open at the top, and the upper part of the main body I! may conveniently be noted from Figure 9.

The U-shaped member i8 is made of case hardened steel, or similar hard metal, so that filing of the raker teeth will not injure the surface of the same.

For the sake of convenience, a small mark 42 is made in the center of the ridge 33, in order to obtain a quick adjustment during operation.

The Figures 10 to 13 show slight modifications in the construction of my device.

Thus, in Figure 10 are shown guides 43, which in this modification are integral with the side pieces indicated at 23 in Figure 1. Said com bined guide and side pieces, as shown in Figure 10, will in addition to the up and downward movement also lend themselves to a sideways adjustment. This sideways adjustment is accomplished by means of horizontal oblong slots 44 and square countersunk bolts 45, slidable in the latter; thereby giving still more flexibility to the device.

A screw 46, a set screw 4'! and a rectangular bar 48, as shown in Figure 10, replace in this modification the setter 2G in Figure 1. As the set screw thus can be adjusted to any desired distance, one is not limited to the two before mentioned fractions of an inch, ae and V64. respectively. A pin, 49 engaging a small slot 5i] in said bar, will hold the latter in place during the adjustment.

It is obvious that some minor changes may be made in the construction, combination and arrangement of parts Within the scope of the appended claims, without departing from the spirit of the invention; and I do not, therefore, wish to limit myself to the exact construction shown and described herein,

l/Vhat I claim as new, and desire to secure by Letters Patent of the United States, is:--

1. In a device of the class described, a base member having a substantially fiat body portion, members arranged at the outer ends of said base member and adapted to adjustably engage the teeth of a saw blade, a U-shaped member mounted upon said body portion, and a setter cooperating with said U-shaped member.

2. In a device of the class described, a base member having a substantially flat body portion, upwardly extending portions at each end of said base member and integral therewith, said upwardly extending portions being formed with slots therein, adjustable guides movable in said slots and adapted to engage the teeth of a saw blade, a U-shaped member centrally disposed at the top of the base member, a setter mounted upon said U-shaped member, and a screw-bolt securing said setter to the latter.

3. In a device of the class described, a base member, a U-shaped member centrally mounted upon the latter, a setter cooperating with said U-shaped member, a spring-actuated screw-bolt securing said setter to the U-shaped member, said. setter being made with recesses in one end thereof, a leaf spring secured to the U-shaped memher, said leaf spring having a stud thereon adapted to engage the recesses in the setter, upwardly extending projections at each end of the base member, and adjustable guides mounted upon the former.

4. In a device of the class described, a base member having a substantially fiat body portion, upwardly extending projections at each end thereof; said projections being formed with oblong slots therein, adjustable guides mounted in the latter and adapted to contact the teeth of a saw blade, a U-shaped member centrally mounted upon the base member, a setter made with two cut-out portions in its lower surface and adapted to cooperate with said U-shaped member, a spring actuated screw-bolt securing said setter to the U-shaped member, said setter being made with recesses in one end thereof, and a leaf spring secured to the U-shaped member, said leaf spring having a stud thereon adapted to engage the recesses in the setter, whereby to fix the latter in a predetermined position.

5. In a device of the class described, a base member having a substantially flat body portion and upwardly extending projections at each end thereof, said body portion and projections being of a diminished thickness at their upper parts, the projections being formed with slots therein, and adjustable guides mounted in said slots, a U-shaped member centrally arranged upon the base member, a setter made with two cut-out portions of an unequal height in the lower surface thereof, and adapted to cooperate with said U-shaped member, a spring actuated screw-bolt securing the setter to the U-shaped member, said setter being made with recesses in one end thereof, and a leaf spring secured to the U-shaped member and adapted to engage the recesses in the setter.

6. In a device, as claimed in claim 2, and wherein each of said adjustable guides comprises a bar formed with a flat-faced lower surface and a projection upon the upper side thereof, a screwbolt integrally secured to said projection and adapted to move in one of said slots, and a wing nut mounted upon the screw-bolt and adapted to secure the guide in an adjusted position with respect to the teeth of a saw blade.

'7. In a device of the class described, a substantially flat sided base member, the end portions 01 the latter being formed with oblong slots therein, guide members pivotally secured to said end portions, a U-shaped member disposed at the Cii top of said base member, a setter mounted upon said U-shaped member, and means for adjusting the setter.

8. In a, device of the class described, a substantially flat sided base member, the end portions of the latter being formed with oblong slots therein, guide-members pivotally secured to said end portions, a U-shaped member disposed at the top of said base member, a. setter comprising a. bar turnably mounted upon the U-shaped memher, and an adjusting screw-bolt cooperating with said bar, and means for securing said bar in posi- 5 tion during operation.

WILLIAM J. BAUMANN.