US2505332A

US2505332A - Scratch awl or the like

Info

Publication number: US2505332A
Application number: US737697A
Authority: US
Inventors: William L Ludwick
Original assignee: Peck Stow and Wilcox Co
Current assignee: Veeder Industries Inc
Priority date: 1947-03-27
Filing date: 1947-03-27
Publication date: 1950-04-25
Anticipated expiration: 1967-04-25

Description

April 0 w. L. LUDWICK ,5 3

' SCRATCH AWL OR THE LIKE Filed March 27. 1947- IN VEN TOR.

W/LL/AM L. L UDW/CK ATTORNEYS.

1 accompanying drawings.

Patented Apr. 25 1950 2,505,332 scKATCir AWL'OR THE LIKE William L. hudwick, Mo "signor to The Peck, St

imt Carmel, Conn, as ow & "Wilcox Company,

* southingtomq Conng; acorporation of Congradient 1 Application March 27, 1 94?, Serial No.-"737',697.

1 Claim. (Cl..279 -9 My invention relates to construction of awls and the like devices.

It is an object of my invention to provide an improved scratch awl or the like device. In this connection, it is desired to simplify the construction, improve the effectiveness, and reduce the cost of these devices.

Other objects and various further features of the invention will be pointed out or will occur to those skilled in the art from a reading of the following specification in conjunction with the In said drawings:

Fig. 1 is a view in partial section of a scratch awl incorporating features of the invention;

Fig. 2 is an end view of the blade employed in the scratch awl of Fig. 1;

Fig. 3 is a fragmentary side view of the blade end shown in Fig. 2; and

Fig. 4 is a partly broken-away perspective view of other parts of the device of Fig. 1.

Briefly stated, my'invention contemplates an improved construction for scratch awls or the like, wherein the number of assembly steps may be materially reduced and the mechanical effectiveness improved-all with a substantial saving in cost. The improved construction in a preferred form contemplates a blade having an upset end to engage one end of a handle, and a washer is scufiingly fitted to the blade in the other end I of the handle. The assembly is completed by attachment of a ferrule of such construction that it may lockingly engage the handle, without the requirement of further forming operations.

- Referring to the drawings, my invention is shown in application to a scratch awl having a blade 5 with a shank portion 6 passing through the bore of a handle I. One end of the blade 5 is upset as at 8, and the upset portion 8 is received in a counterbore in the handle 1. To resist relative rotation of the blade 5 with re spect to the handle I, fins or gussets 9 may be formed at the enlarged portion 8 on the shank 6 so that, when the blade 5 is inserted into the handle 1, these fins 9 may bite into the handle. In accordance with a feature of the invention, the handle 1 is secured atits other end to the blade 5 by means of awasher or stop ring l0 having an internal diameter preferably slightly less than the external diameter of the shank 6 at the point where the fit is to be made. assembling the washer ID to the shank 6, the washer [0 may be slipped over the free end of the blade 5 and scuffed or swaged, as the case may be, along the shank 6 to the position shown in Fig. 1. I have found that a fit of this kind for scratch the washer 10 on the shank 6 maybe made-so secure'as'fitomesistidlslodgement until after the handle 7 and other parts have been destroyed beyond use.

Also in accordance with a feature of the invention, I provide a novel ferrule II to embrace the washer l0 and the end of the handle 1 to which the washer H1 is adjacent. The ferrule it! may be formed of sheet metal, as by rolling or drawing, and it preferably includes a radially inwardly projecting portion or bead I2 lockingly to engage the handle 1. By forming the internal diameter of the projection l2 substantially equal to or in excess of the external diameter of the washer l0, it will be seen that the ferrule ll may be assembled to the blade handle by a simple press fit. The ferrule II is preferably slightly tapered to fit over the correspondingly tapering end M of handle 7, and the inside diameter of the bead l2 should equal or slightly exceed the diameter of the washer in. As the ferrule II is slipped over the handle end l4 and then pressed into the final position shown, it will be understood that the bead 12 will firmly engage the handle 1 to make a permanent fit.

In accordance with still another feature of the invention, the ferrule I I may be even more firmly secured to the handle I by forming an internal knurl, serrations, or other tooth-like projections l3 on the inner surface of the projection or bead [2. It will be understood that the knurl l3 need in no way interfere with the ferrules wedging in place on the handle 5' and that, once in the assembled position shown, the tooth-like projections of the knurl I? may lockingly engage the ferrule against rotation with respect to the handle 1. The knurl l3 or otherwise roughened inner surface of the ferrule Il may be formed so as to leave the outer surface thereof smooth and, therefore, easy and convenient to manipulate.

It will be understood that I have described an extremely simple construction for scratch awls and the like. According to this construction, the only necessary assembly operations are a force fit of the washer It on the shank 6 and a forced pressing of the ferrule ll into place. Both of these operations may be performed with the simplest of equipment; that is, no elaborate centering or chucking devices are required as when a bead or other forming operation is performed (in accordance with conventional practice) after assembly of the parts. The novel construction will also be understood to be extremely rugged and readily adaptable to screw drivers or the like, as long as the shank diameter is equal to or exceeds the maximum diameter of the free end of the blade.

While I have described my invention in considerable detail for the preferred form shown, it

will be understood that modifications may be 5 made within the scope of the invention as defined in the appended claim.

I claim:

In a device of the character indicated, a blade including a cylindrical shank, a handle with a cylindrical bore no greater in diameter than the diameter of said shank, said shank being inte-' grally formed with an upset end, and the rest of said blade having a maximum transverse dimension no greater than the diameter of said shank, whereby said blade may be inserted through said handle until said upset end abuts one end of said handle, and a stop ring around said shank and having an initial inside diameter less than the diameter of said shank and press-fitted over said go shank against the'other end of said handle.

AM L. LUDWICK.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 285,060 Nies Sept. 18, 1883 366,308 Derby ...2 July 12, 1887 666,281 Morgan Jan. 22, 1901 797,609 Schade Aug. 22, 1905 1,816,359 Carlin July 28, 1931 2,046,733 Forsberg July 7, 1936 FOREIGN PATENTS 15 Number I Country Date 348,696 Italy May 25, 1937