US1522029A - Pick and like hand tool - Google Patents

Description

Jan. 6.1925. 1,522,029

B. B. ROBERTS PI CK AND LIKE HAND TOOL Filed Sept. 19, 1924 MH IIJ I. M N y Patented Jan. 6, 1925.

BRERETON BURGESS ROBERTS, OF HEATH, WALES, ASSIGNOR TO JOSEPH WALTER/S,

tantra earner orries.

0F HEATH, WALES.

PICK AND LIKE HAND TOOL.

To all whom it may concern Be it known that I, Bnnanron' Bunonss Ronnnrs, of Park House, Cimla, Neath, in the county of Glamo'rga-n, VVa-les, a subject of the King of Great Britain and Ireland, have invented Improvements Relating to Picks and like Hand Tools (for which I have filed an application in Great Britain,

No. 18,432, filed the 17th July, 1923), of which the following is a specification.

Thisinvention relates to hand tools such as picks, axes, adzes, hammers, rakes, hoes, shovels or the like, of the kind wherein a metal head or blade is detachably and yet firmly secured to av handle or shaft by av pair of plates in combination with clamping sleeve around said plates.

The object of such a provision is to enable the head, blade or the like to be readily attached and detached, whether for substitution of another head, blade or tool of the same or different kind, or for easy carriage or storage or other purpose. For instance, a coal miner changes his pick blade for a sharp blade after it has become blunt, and he takes several sharp blades with him into the mine in readiness for this purpose. For convenience my invention will be described herein as applied to a pick ofa size and general well known type, but it will be evident that my invention. can be extended to other purposes also, such as garden implements for example. My invention therefore consists of certain improvements which aim at carrying out the aforesaid objects in a more convenient, reliable and expeditious manner than heretofore.

Reference will be made to the accompanying sheet of drawings, illustrating a convenient form of my invention, as applied to a miners pick.

In the drawings herewith, Fig. 1 shows a general assembly in perspective of a. pick and means for ataching the same to a handle, Fig. 2 shows the formation of the centre section of the pick, Fig. 3 is a partsectional elevation of the end of the handle showing the parts separated, Fig. 4 is a vertical sectionon line 48 of Fig. 1. Fig. 5 is an end elevation, the blade being in section.

Referring to Figs. 1, 2, 4 and 5, the blade 1 is formed with a reduced and wedgeshaped centre section 1 Side plates 2 and 3 (seen in section in Fig. 3) which are clamped upon opposite sides of the handle 4 at one end, and are suitably curved to accommodate themselves to the handle, and to hold the blade 1 in place by engaging the reduced centre-section 1 of the tool. One of the plates, for example 2. has a pin 5 projecting from it and riveted thereto, and the handle 4 has a hole in a suitable position to receive the said pin 5. The opposite plate 3 is provided with a hole 6 in the right position to engage the protruding end of the pin 5, which therefore serve to locate the two plates 2, 3 upon the handle 4. The whole device is wedged in place by a malleable cast steel collar 7, which is slightly tapered internally, the same being slipped on the handle 4 and slid along until it embraces the two plates'2, 3. The size and shape ofthis collar 7 is carefully chosen to make the whole fitting rigid and strong. It is necessary that it shall be a close working fit, requiring to be forced upon the plates 2, 3, while the latter are gripping the centre section 1 of the blade 1 and the end of the handle 4: between them, and it is these plates 2, 3, which hold the blade 1 to the handle 4. This hold is further increased by providing at one end of the collar 7 two opposite recesses 8 to accommodate the blade 1 thus tending to hold it still more firmly, by pressing together the ends of the plates 2, 3 with the blade between them.

The ends of the plates 2, 3 are provided with a flange or rim 9 which projects outward at a right angle to overlie the centre section 1 of the blade.

The centre section 1 of the pick or tool is of such size that its shoulders will be engaged by the plates 2, 3, and is tapered transversely, as is seen in the drawings. The sufaces 2 3 of plates 3, where they grip centre 1 are correspondingly inclined. Virtually therefore, the formation ofthe section 1 provides a recessed portion on blade 1 which is engaged by the projecting parts of the members 2, 3. The plates 2, 3 are of course exteriorly formed so as to be snugly engaged by the collar 7 which by virtue of the taper, jams theplates tightly on both blade 1 andhandle 4. The collar 7 may be lightened by apertures such as 7* (Fig. 3).

It will be realized that the pin 5, whilst probably contributing to the security of the device has its chief function in positioning section and the plates 2, 3, on the handle 4; which is provided with an aperture for the passage therethrough of the pin 5.

In order to lessen the diliiculty of fitting the section 1 of the pick or tool with the clamps :2 and 3, the flanges 9 and 10, have their sides 2 and 3 inclined, which insures a snug fit when the members 2 and 8 are forced together by the sleeve.

1 claim l. A tool handle fastening comprising a handle having a transverse bore adjacent to its end a pair of complementary handle and tool embracing members, one of said members having a pin attached thereto the opposite member being apertured to receive an end of said pin, said members having tool engaging jaws which are movable toward each other, said jaws having inward extending shoulders and sidewalls which are tapered in a direction opposite to an external tapered portion of the sections, a clamping sleeve having at one end recesses to admit of said sleeve being forced beyond the tool engaging recesses of the complementary members, and outward extending flanges on opposite ends of the sleeve.

2. Means for securing a tool to a handle, said tool having a central portion with converging side walls and angular shoulders a pair of tool and handle engaging members provided with tool embracing recesses, means for holding one of said members in positive engagement with. a handle, and a clamping sleeve provided with recesses which admit of the sleeve being forced upon the clamping members to extend beyond the inner face of the tool.

3. The herein described means for securing the head of a pick or like tool having a reduced beveled portion and shoulders to a handle, of complementary handle and tool engaging sections, means for holding said sections in non-slidable engagement with a handle, said sections having portions which extend beyond the end of the handle to embrace the reduced portion of the tool, and a slidable clamping sleeve which embraces the complementary sections to force the same toward each other when moved toward the tool. the parts being of such construction that a portion of the sleeve will overlie the sides and lower edge of the tool.

In witness whereof I have signed this specification.

BRERETON BURGESS ROBERTS.

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