US2015373A - Saw handle structure - Google Patents

Description

J. .N. ALEXANDER WW SAW HANDLE STRUCTURE Original Filed Dec. 18, 1933 Patented Sept. 24, 1935 mes FFIQE SAW HANDLE STRUCTURE James N. Alexander, Birmingham, Ala.

Application December 18, 1933, Serial No. 703,020 Renewed February 26, 1935 4 Claims.

This invention relates to saw handles, and more particularly to saw handles of the ordinary handsaw type.

M This application is a continuation in part and 5 an improvement upon my application Serial No.

681,633, filed July 21, 1933.

An object of my invention is to provide a light unitary metal structure in which the mini- I q mum of metal is used, and in which the lubricant 1o"reservoir in the hand engaging portion not only provides for lubrication but also for decreasing weight. 1

Another feature of my invention is the provision of oiling means which will tend to prevent rusting of the blade in the place where the steel contacts with the metal of the handle.

Another important feature of my invention is to design a quickly detachable handle in which .the means for holding the blade in place in the handle will be protected from injury through chance blows.

I have illustrated in the accompanying drawing a detailed structure, which is only one embodiment. It is my desire that I be not limited to the particular embodiments, but that I may be limited solely by the showing of the prior art and the scope of the appended claims.

In the drawing:

Figure 1 is a view in side elevationof my handle 1 attached to a saw blade.

Figure 2 is a view taken along the line 2-2 of Figure 1.

Figure 3 is a fragmentary sectional view showing a portion of the lubricating system. 5 Figure 4 is a view taken along the line 44 of Figure 1. j ,1

Figure 5 is a View taken along the line 5-5 of Figure 1.

Figure 6 is a view taken along the line 6-6 of Figure 2.

As the invention is described, other objects than those above set forth will become apparent.

Referring to the drawing, I have shown a metallic saw handle, which may be made of aluminum, which comprises a bifurcated blade engaging section I and a hand engaging portion 2. These two may be integrally formed from metal such as aluminum. The bifurcated blade engaging section I is provided with depressed areas 3, as is plainly seen from Figures 1, 2 and 4. These depresed areas have outer rims 4. Within the depressed areas are located apertures 5, through which fit the shanks B of wing bolts 1. The wing bolts 1 are provided with immovably attached V wing portions 8, with inwardly projecting lugs 9 that are adapted to fit within supplemental apertures it! formed at the side of the main apertures 5. These lugs 9 engage the supplemental apertures I9 and tend to prevent rotation of the wing bolts i when seated in place.

There is a saw blade H which fits in a slot I2 formed in the bifurcated blade engaging section I. It is understood that the saw blade H is provided with apertures corresponding to the apertures in the bifurcated section to receive the 10 wing bolts. The: wing bolt shanks 6 are provided with portions of decreased diameter l3 which are screw threaded and over which fit revoluble wing portions Hi.

This wing bolt assembly holds the saw blade 15 H firmly in place. The assembly is light, by

reason of the sunken or depressed areas so formed in the blade engaging section I. It is to be particularly noted that the rims 4 surrounding the sunken areas 3 are of such height that the wing 29 bolts are completely shielded from contact with an object which will engage the rims 4. In otherwords, the bolts are sunk in the depressed areas 3 out of harms way. This construction permits ready removal of the saw blades, quick adjustment manually to tighten the saw blades in case they work loose while in the field, and at the same time the holding means for the saw blade is not apt to be injured by chance blows, because of the excellent protection afforded by the rim. It is to be noted that the wing bolts will not rotate once the lugs 9 are in the apertures Iii.

The saw handle is further lightened by two oil reservoirs 15, which are located in the handle. These oil reservoirs are separated by a dividing partition l6 and constitute separate oil systems. Each oil reservoir I5 communicates with a passageway ll, which at its outer end has a fixture l8 that is screw threaded into the metal of the blade engaging section. These elements I8 have a hollow central portion l9 (see Figure 5), and a tapered nozzle 2| provided with a central oil aperture 22.

These elements l9 are provided with pressure flip valves 23 which prevent passage of the oil from the reservoirs l5 until they are subjected to pressure. These fiip valves 23 are rubber valves. Their configuration is shown in cross section in Figure 5. Each rubber flip valve is of nipple shape, the tip of the nipple being split, as indi- 50 cated at 24. The rubber material gives at the teat, the split opens when the pressure of the oil in the reservoir is high enough to distort the rubber at the teat. The rubber is ordinarily sufficiently resistant to withstand the weightof the 55 lic handle.

column of liquid in each reservoir [5 without permitting the split in the teat to open. Such valves are true pressure valves, and are of very simple construction. It is to be noted that these flip valves are protected from harm by reason of the construction of the elements l8 and are not subjected to injury through blows.

Each reservoir I5 is provided with an open section 25 over which fits a flexible cover 26. Each reservoir is fillable through an aperture 21, closed by a knurled plug 28.

In use, the operator of the saw will squeeze upon either of the covers 26 of either of the reservoirs l5 to eject a stream of oil through the flip valves and onto the working surface of the saw.

It is to be noted that the reservoirs and oil systems are separate. This is a feature of importance, since one face only of the blade should be oiled at one time. The saw blade, when being oiled, is placed approximately parallel to the ground, and the upper face has oil ejected upon it in order to lubricate it. If the undersurface of the blade had oil ejected upon it at this time, the stream of oil would mostly dribble upon the ground, and the operation would be quite inefficient.

The location of the reservoir in the handle permits the blade adjacent the bifurcated blade engaging section to be lubricated, thereby preventing rusting of the blade in place within the metal- This feature is of considerable utility because there is more danger of adherence of the blade to the handle where metal contacts metal than would be the case where a blade was inserted in a wooden saw handle. The oil can be ejected without much force, and will tend to lubricate the contact areas between the blade and the bifurcated parts of the blade engaging section I. The reservoir in the handle, together with the sunken areas 3, lighten the construction so that when the saw handle is made of a light metal such as aluminum it is not unduly heavy or cumbersome.

I claim:

1. A metallic saw handle of integral construction comprising a bifurcated blade engaging section integrally formed from the metal of the handle, a hand engaging portion formed integrally with the bifurcated blade engaging section, a divided lubricant reservoir within the handle, the dividing wall thereof operating as a structural brace behind the bifurcated blade engaging sections, means at the forward edge of the handle and in communication with the reserevoir to direct the lubricant upon the working area of the blade, spray means operating on each side of the divided parts of the reservoir for controlling the ejection of the lubricant on one face only of the blade, the blade engaging section being provided with sunken areas and means to hold the blade in the section, and wing bolts in said areas to 5 hold the blade of the saw, the depth of the sunken areas being such as to completely submerge the wing bolts below the level of the metal around the edge of the depression.

2. A metallic saw handle comprising a bifur- 10 cated blade engaging section integrally formed. with the metal of the handle, a hand engaging portion formed integrally from the bifurcated blade engaging section, two lubricant containers within the hand engaging portion, means in communication with each container to direct the lubricant therefrom onto one working surface only of the blade, other means in line with the center of the bifurcated blade engaging section normally to prevent communication between each lubricant container and said last mentioned means, the blade engaging section being provided with sunken areas, and wing bolts in said areas to hold the blade of the saw, the depth of the sunken areas being such as to completely submerge the wing bolts below the level of the metal around the edge of the depression.

3. A metallic saw handle of integral construction comprising a handle grip having openings in each side thereof with reservoir chambers formed below the openings, flexible means to close the openings, means operable through the flexible means to oil the saw, a central brace acting as a dividing partition for the reservoir integrally formed with the handle grip, a bifurcated blade engaging extension forward of the handle and having a median saw engaging slot in line with the central brace of the handle grip, and means to hold the saw blade in the extension.

4. A metallic saw handle of integral construction comprising a handle grip having openings in each side thereof with reservoir chambers formed below the openings, flexible means to close the openings, means operable through the flexible means to oil the saw, a central brace acting as a dividing partition for the reservoir integrally formed with the handle grip, a bifurcated blade engaging extension forward of the handle and having a median saw engaging slot in line with the central brace of the handle grip, said extension having a sunken area and means to hold the blade in the extension which shall lie wholly below the edge of the sunken area.

JAMES N. ALEXANDER.

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