US219425A - Improvement in crank screw-drivers - Google Patents

Improvement in crank screw-drivers Download PDF

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Publication number
US219425A
US219425A US219425DA US219425A US 219425 A US219425 A US 219425A US 219425D A US219425D A US 219425DA US 219425 A US219425 A US 219425A
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Prior art keywords
screw
drivers
improvement
crank
crank screw
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Expired - Lifetime
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/0007—Connections or joints between tool parts
    • B25B23/0035—Connection means between socket or screwdriver bit and tool

Definitions

  • the drawing is a side view of my improved implement, partly in section, to show the con struction.
  • the object of this invention is to furnish an improved scrcw.- driver or brace which shall be so constructed as to force the screws in and out quickly, which may be readily held in place in theslot of the screw-head, and which may be used in any place where an ordinary screwdriver can be used.
  • the invention consists in a crank screwdriver or brace formed of the shaft having a revolving handle placed upon it, and provided at its outer end with a small crank and at its forward end with a socket'to receive a bit, as hereinafter fully described.
  • A is a small crankwhich is made with a pivoted knob or handle, and is formed upon or rigidly attached to the end of a straight shaft, B.
  • a handle, O Upon the shaft B is pivcted a handle, O, and to its lower end is attached, or upon it is formed, a socket, D, to receive the shank of a small screw-driver or bit, E.
  • the bit E is exactly in line with the shaft B and handle O, so that it is easily held in the slot of the screw and kept from slipping out and marring the object into which the screw is to be driven, or from which it is to be withdrawn, while the crank A allows the screw to be turned in or out rapidly.
  • the screw-driving hit E may be detached and replaced with a boringbit, so that the same implement may be used for formin g the holes to receive t-he screws and for forcing ⁇ the screws into the holes.

Description

'UNITED STATES PATENT OFFICEo GEORGE ABRAMS, OF PHILADELPHIA, PENNSYLVANIA.
IMPROVEMENT IN CRANKA SCREW-DRIVERS.
Speciiication formingpart of Letters Patent N0. 219,425, dated September 9, 1879 application led July 31, 1879.
To all 'whom 'it may concern:
Be it known that I, GEORGE ABRAMS, of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented a new and useful Improvement in Crank Screw- Drivers, of which the following is a speciication.
The drawing is a side view of my improved implement, partly in section, to show the con struction.
The object of this invention is to furnish an improved scrcw.- driver or brace which shall be so constructed as to force the screws in and out quickly, which may be readily held in place in theslot of the screw-head, and which may be used in any place where an ordinary screwdriver can be used.
The invention consists in a crank screwdriver or brace formed of the shaft having a revolving handle placed upon it, and provided at its outer end with a small crank and at its forward end with a socket'to receive a bit, as hereinafter fully described.
A is a small crankwhich is made with a pivoted knob or handle, and is formed upon or rigidly attached to the end of a straight shaft, B. Upon the shaft B is pivcted a handle, O, and to its lower end is attached, or upon it is formed, a socket, D, to receive the shank of a small screw-driver or bit, E. With this construction the bit E is exactly in line with the shaft B and handle O, so that it is easily held in the slot of the screw and kept from slipping out and marring the object into which the screw is to be driven, or from which it is to be withdrawn, while the crank A allows the screw to be turned in or out rapidly.
If desired, the screw-driving hit E may be detached and replaced with a boringbit, so that the same implement may be used for formin g the holes to receive t-he screws and for forcing` the screws into the holes.
Havingthus described my invention, l claim as new and desire to secure by Letters Patent- A crank screwdriver or brace formed of the shaft B, having a revolving handle, O., placed upon it, and provided at its outer end with a small crank, A, and at its forward end with'a socket, D, to receive a bit, E, substantially as herein shown and described.
GEORGE ABRAMS.
Witnesses:
ROBERT A. BROWN, WM. J. MGHENRY.
US219425D Improvement in crank screw-drivers Expired - Lifetime US219425A (en)

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US219425A true US219425A (en) 1879-09-09

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US219425D Expired - Lifetime US219425A (en) Improvement in crank screw-drivers

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2734413A (en) * 1956-02-14 Chuck and ratchet mechanism

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2734413A (en) * 1956-02-14 Chuck and ratchet mechanism

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