US2174327A

US2174327A - Screw driver

Info

Publication number: US2174327A
Application number: US216798A
Authority: US
Inventors: Eugene S Love
Original assignee: Individual
Current assignee: Individual
Priority date: 1938-06-30
Filing date: 1938-06-30
Publication date: 1939-09-26
Anticipated expiration: 1956-09-26

Description

E. S. LOVE SCREW DRIVER sept. 26, 14939.

Filed June 30,' 1938 Patented Sept. 26, 1939 UNITED STATES PATENT OFFICE 1 Claim.

This invention relates to screw drivers, and an object of the invention is to provide a screw driver, the blade or bit of which may be readily adjusted longitudinally with respect to the handle of the tool as found desirable.

A further object of the invention is to provide a screw driver of the character above mentioned wherein the headed screw or similar work may be placed and magnetically held preparatory to being rotated in securing it to an object.

The invention together with its objects and advantages will be best understood from a study of the following description taken in connection with the accompanying drawing wherein:

Figure 1 is a longitudinal sectional view through the screw driver with certain parts shown in elevation,

Figure 2 is a horizontal sectional viewtaken substantially on the line 2 2 of Figure l, and

Figure 3 is a fragmentary detail sectional View taken substantially at right angles to Figure 1, and at the blade or bit-equipped end of the tool.

Referring to the drawing by reference numerals it will be seen that the screw driver in the preferred embodiment thereof comprises a handle 5 of wood or other suitable material that is provided with an axial bore 6 and is equipped at one end with a metallic ferrule or cap 'I for strengthening and reinforcing purposes.

The bore 6 accommodates therein a shank 8 that is provided with a threaded pin 9 on which is threaded a cap nut I0 that seats within a socket provided therefor in the outer or free end of the handle 5 and serves to secure the shank 8 in positive association with the handle 5.

At the end thereof remote from the pin 9 shank 8 is provided with an integral fork II the legs I2 of which are in closely spaced parallelism and at their terminals I3 are magnetized in a manner to provide a permanent magnet so that when engaged with the head of a screw or the like I4 the latter will be held in place, magnetically, preparatory to being rotated in securing it to an object.

The legs I2 of the fork II slidably accommodate therebetween the blade or bit I5, the term bit as here used referring particularly to a screw driver bit or blade but may of course include all forms of replaceable hand tool elements that may be connected to the handle tool 5.

The bit or blade I5 is substantially flat and is provided on opposite sides thereof with longitudinal ribs or keys I6 that are accommodated in longitudinal grooves or ways II provided on the inner sides of the legs I2 of fork I I as will be clear from a study of the drawing. Thus the bit I5 is held between the legs of the fork II in 5 a manner constraining the bit or blade to shift longitudinally relative to the fork.

The opposite longitudinal edges of the bit or blade I5 are provided with threads I8 that complement the threads of an adjusting nut I9 that 10 is engaged in grooves 2U provided in the outer sides of the legs l2 of the yoke II. Obviously by rotating the nut I2 the bit I5 may be projected or retracted relative to the fork or yoke I I.

Also, in accordance with the present inven- 15 tion the working head of the blade or bit l5 has the opposite sides thereof knurled or otherwise formed to provide roughened surfaces 2| that will engage the contacting metal of the screw head and effectively stop longitudinal mo- 20 tion of the bit or blade relative to the screw and thus overcome the tendency of the blade or bit to lift out of the kerf in the head of the screw as sometimes occurs when twisting force is applied to the screw driver and as is necessary in 25 securing the screw to the object or work.

It is thought that a clear understanding of the construction, utility and advantages of a screw driver embodying the features of the present invention will be had without a more detailed de 30 scription.

Having thus described the invention what is claimed as new is:

In a screw driver, a handle, a xed holder eX- tending from the handle and comprising a pair 35 of parallel laterally spaced legs provided in the inner faces thereof with a pair of opposed longitudinal grooves, extending from end to end thereof, and a pair of opposed transverse circumferential grooves intermediate said ends', a nut ro- 40 tatably mounted in said transverse grooves, and a bit of substantially the same length as said legs slidably fitted therebetween and provided with a reduced fiat working end and longitudinal `keys fitting into said longitudinal grooves and 45 extending from said reduced end to the opposite end of the bit, said bit having threaded side edges extending outwardly of said legs for engagement with the threads of said nut, the outer 50 ends only of sald legs being magnetlzed.

EUGENE S. LOVE.