US2416832A

US2416832A - Nail straightening machine

Info

Publication number: US2416832A
Application number: US488365A
Authority: US
Inventors: Hulburt George Delbert
Original assignee: Twentieth Century Fox Film Corp
Current assignee: Twentieth Century Fox Film Corp
Priority date: 1943-05-25
Filing date: 1943-05-25
Publication date: 1947-03-04
Anticipated expiration: 1964-03-04

Description

March 4, 1947. l G HULBURT 2,416,832

' NAILLSTRAIGHTENING MACHINE Filed may 25, 1945 2 sheets-sheet 2 l. INVENTOR Georlge D. Har-bartv Patented Mar. 4, 1947 NAIL STRAIGHTENING MACHINE George Delbert Hulburt, Los Angelesyialifj., as-

signor to Twentieth Century- Fox FilmCorpo-k ration, Los Angeles, Calif., a.Y corporation of New York Application May 25, 1943, Serial No. 488,365v

l This invention deals with a machine for straightening nails. i

The machine to be described and claimed ,hereinafter has been designed for the purpose of salvaging nails. It is to be understood that the nails to be straightened by the machine must first be extracted and then fed to the machine in the manner to be later explained.n VThe machine straightens the nails in a single operation and has been found to give satisfactory results on nails bent almost to an angle of ninety degrees. In practice, the nails are straightened cold.

In its preferred form the apparatus consists of arotating, circular table carrying V-shaped slots or dies adapted to receive the crooked nails and bring them under a reciprocating shoe which is synchronized with the movement of the table to engage the nails in the slots and press them into a more or less straightened condition. A noteworthy feature of the shoe and die construction is the arrangement of wings or fins extending laterally and downwardly from the side of the shoe to form a V-shaped guide on the bottom of the shoe. These fins work in slots in the die and serve the purpose of forcing extremely crooked nails into the bottom of the .V-shaped slot before the straightening force is applied. Another feature worthy of mentioning is the fact that the shoe and the die are so formed as to force the` nail slightly `beyond the straightened .Position when the shoe has reached the end of its pressure stroke. This is for the purpose of forcing the material in the nail to set slightly beyond the straightening point, thus allowing for any spring-back in the nail. Y

Accordingly, it becomes an object to provide a nail straightening machine wherein the nails are placed in a rotating table having nail receiving slots therein and a reciprocating plunger having a. shoe on the end thereof is adapted to enter said slots and press the nails into a more or less straightened condition.

Another object of this invention is to provide a nail straightening machine wherein nails may be straightened by pressing them into a V-shaped die by means of a V-shaped shoe adapted to iit said die and wherein the shoe has laterallns arranged to form a V-shaped guide extending beyond the bottom pressure point on the shoe.

A further object of the invention is to provide a machine for the purpose described, charac- Y terized by simplicity, durability, inexpensiveness,

and one which may be operated by unskilled labor. e

' 2 claims. (01.153-48) Other objects and advantages will become apparent asthe description proceeds in conjunction with the drawings in which: l i

Figure. 1 'is a side elevation partly in sectio of the complete machine;

Figure 2 is an end elevation partly in section of the same; Y,

Figure 3 is a side elevation of part of the super structure; f

Figurevfl is a top plan view of the machine;l Figure 5 is an enlarged fragmentary V'view of .the die showing crooked nails and straightened nails in place; l

Figure 6 is an enlarged vfragmentary viewl of the die and the shoe; f l Figure 7 is a view ofthe shoe taken at -right angles to Figure 6;

Figure 8 is an enlarged fragmentary view taken in the direction of the arrow' ony Figure 4; and Figure 9 is a magnified sectional view of the shoe and die showing them in place withsa nailv in a straightened position.

Briefly stated, the invention comprises a rotating table generally designated kII and a reciprocating shoe generally designated I2. The table II carries a plurality of dies, or V-shaped slots designated I3, which are a part ofthe Ytable and adapted to be rotated therewith and by means to be later described, synchronized with the movement of the shoe I2. The table` II is suitably supported upon rollers I4, which are in turn carlried upon a frame generally designated I5 and is journaled in the middle through bearings I6 and I I adapted to rotatably receive a shaft I8 xed to the center of the table. This structure will be seento provide a rotatable support for the table II and at the saine-time'furnish sufcient supporting means so that enough pressure can be brought to bear on the table to straighten the nails. No detailed construction of the frame will be given,v since it may take avariety of forms such as a fabricated frame or a cast frame, either of which will be` suitable for the purpose.

It will be observed, however, that oneend of the frame extends above the table II and is provided with a crossbar I9. suitably vmounted on the crossbar I9 is a mechanism generally designai-,ed 20 which is for the purpose of reciprocating the shoe I2. As shown, this mechanism comprises a boxlike casing 2| into which is reciprocably tted a cage 22. In the cage 22 there is a block 23 which is adapted to reciprocate therein. The block 23 in turn is mounted upon a pin 24, which pin is eccentrically mounted upon a disk 25, the disk 25 in turnbeing xed to ashaftf26 table having a plurality of dies therein adapted to receive bent nails having their heads and pointed ends projecting out of the dies, a shoe adapted to reciprocate into and out of said dies, means operable by the movement of said shoe to intermittently rotate said table so that said shoe may bringr pressure to bear upon nails in successive dies in said table, a xed sloping member adapted to engage the heads of said nails and dislodge them from the bottom of said dies, and a striking member operable kby the movement of said table to strike said pointed ends and drive the nails out of the dies.

GEORGE DELBERT HULBURT.

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

Number Number 6 UNITED STATES PATENTS Name Date Glenn July 1'7, 1906 Glenn Mar. 17, 1908 Kellogg Mar. 8, 1927 Fontaine Nov. 10, 1885 lZ/)odge June 22, 1853 FOREIGN PATENTS Country Date German (Schulze) Feb. 28, 1934 Swiss (Hartmann) June 2, 1919 Swiss Nov. 1, 1920