US1375606A - Screwdriver - Google Patents

Description

J. PEYER.

SCREWDRIVE'R.

APPLICATION FILED SEPT. Is. 1919;

Patented Apr. 19, 1921..

. INVENTOR fihnfeyer.

WITNESSES vireo sures .JOHIN' IE'EYER, 0F BROOKLYN, NEW YORK.

SCREWDRIVER.

Application filed September 18, 1919.

To all whom it may concern: 5

Be it known that I, JOHN PEYER, a citizen of the United States, and a resident of the city of New York, borough of Brooklyn, county of Kings, and State of New York, have invented a new and useful Improvement in Screwdrivers, of which the following is a full, clear, and exact description.

This invention relates to tools and more particularly to a type of tool having a handle separable from the tool proper. The present invention relates still more particularly, and descriptively to a screw driver having a handle and shank which is separable one from the other.

An object of the invention is to provide a screw driver comprising a handle separable. from the screw driver shank or bit. It is a purpose to disclose a tool for metal or wood working mechanics of which the bit. or shank of the tool is removable from the handle in order to reinsert within the handle a smaller or a larger tool in order to adapt the tool to the particular work at hand.

It is a further object of this invention to provide a tool handle design which may be used in connection with various kinds of tools such as screw drivers, chisels, punches, awls, reamers, and various other kinds of tools where it is desirable to employtools of divers sizes and shapes, and where it is desirable to have a standard handle adapted for each of the said tools.

With the above principal objects and others in view, the invention relates to the several tool designs as disclosed in the appended claim, as described in the following specification, and one practical example of which is portrayed in the accompanying drawings, wherein:

Figure 1 illustrates a tool, such as a screw driver in elevation; and Fig. 2 illustrates a longitudinal sectional view of this tool where the handle is in section and the tool proper or shank" is in elevation,

Fig. 3 shows a sectional view taken. on the line 3-3 of Fig. 2; and Fig. 4 shows a sectional view taken on the linedl of Fig. 2.

Referring now more in particular to the drawings, the numeral 6 designates a tool handle appropriately shaped to fit the mechanics or workmans hand. This handle may be made of any appropriate material, it being preferable to employ metal where Specification of Letters Patent.

Patented Apr. 19, 1921. Serial No. 324,435.

the tool is used for rough and heavy work. This will enable the mechanic to use a mallet or hammer against the tool handle and drive i the tool against the work without material damage. The handle is drilled at the one end to leave a longitudinal bore 7. Likewise the handle is drilled at the base of the longitudinal bore to provide a transverse bore 8. The longitudinal bore 7 at its juncture with the transverse bore 8 is provided with an upstanding rib constituting a shoulder 10. The bore 7 is cylindric in shape and does not depend upon conicity of shape to hold a tool shank in the bore or socket of the handle such as is the case with many forms of tools employing separable tool handles. 7

The tool shank 11 is provided with a short tapered end 12 and an oppositely disposed flat beveled surface 14 affording a clearance space between the wall of the bore 7 and said beveled surface.

A locking pin 15 is inserted in a hole formed transversely of the bore 7 which disposes said pin across the clearance space formed between the cylindrical wall of the handle and the flat beveled surface of the tool shank. It may be preferable to so fit the pin into the handle across the bore, that the axis of the pin will be about tangent to the circumference of the socket bore. By this arrangement approximately one half of the periphery of the pin 15 will be exposed within the longitudinal bore 7 whereby upon insertion of the tool shank 11, a frictional engagement and gripping action will be effected between the pin and the beveled surface 141 of the shank, which gripping ac-' tion will be further augmented by engagement of the tapered end 12 of the shank with the beveled surface of the shoulder 10.

To remove the tool, the operator may insert a punch or other suitable tool through the hole 8 and exert a prizing movement against the end 12 of the shank which loosens the shank from its seated position against the pin and permits the removal of the tool shank from the handle. To apply the tool to the handle, the operator inserts the tapered end 12 into the bore 7 with the beveled surface 14 disposed toward the side of the bore traversed by the pin. The harder the mechanic presses against the handle, the firmer and more positive will be the gripping action of the handle and the locking pin against the tool shank. This design of tool, and this particular locking pin, with the cooperating flat beveledface of the tool shank, will permit the mechanic to exert a very great manual torque through the tool into the work being executed.

This invention, and consequent tools, is presented to fulfil the need felt for interchangeable tools of substantial character and convenient to use.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

The combination with a tool provided with a shank having the inner extremity thereof formed respectively with tapered and beveled surfaces, of a handle for detachable association therewith, said handle g having a longitudinal bore and a transverse bore communicating with the inner extremity thereof, a transverse beveled rib formed across one wall of said longitudinal bore adjacent its juncture with the transverse bore, said rib adapted to engage the bevel surface of the shank, and a pin extending transversely through said handle and having a portion of its periphery disposed within the bore of the wall opposite to the rib whereby upon insertion of the tool in the handle, a frictional binding of the inner extremity of said shank will be effected through the engagement of the beveled surface with the beveled rib and the tapered surface with the periphery of the pin.

JOHN PEYER.

Images