US308247A - John freaeson - Google Patents

John freaeson Download PDF

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Publication number
US308247A
US308247A US308247DA US308247A US 308247 A US308247 A US 308247A US 308247D A US308247D A US 308247DA US 308247 A US308247 A US 308247A
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screw
john
driver
freaeson
head
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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
    • B25B15/00—Screwdrivers
    • B25B15/001—Screwdrivers characterised by material or shape of the tool bit
    • B25B15/004—Screwdrivers characterised by material or shape of the tool bit characterised by cross-section
    • B25B15/005—Screwdrivers characterised by material or shape of the tool bit characterised by cross-section with cross- or star-shaped cross-section

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  • My invention consists of an improvement, fully described hereinafter, in the screw-driver kfor which Letters Patent of the United States No. 179,695 were granted to me July 11, 1876, the main obj ect of my present invention being tov make a much stronger screw-driver than that described in said patent.
  • Figure 1 is a sectional perspective view of a screw-head to which the improved screw-driver is adapted;
  • Fig. 2 a perspective view of the end of the screw driver;
  • Fig. 3 a side View of the same;
  • Fig. 4 a transverse section on the line 1 2, Fig. 3, and
  • Fig. 5 a view illustrating the 'character of my patented screw-driver.
  • each 4 groove A is rounded at m, so as to add great strength to the working end of the screwdriver.
  • rPhe edges e as well as the sides f of the tapering ribs B converge to the point w, so as to fit snugly inthe orifice ofthe screw- 5( head, and the concave bottom m of each groove B is continued throughout the entire length of the working-head ofthe screw-driver, the concave bottom, however, tapering to the point w', where it disappears.

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Description

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No. 808,247. Patented Nov. 18, 1884.
NTTED STATES PATENT Trice.
JOHN FREARSON, OF BIRMINGHAM, COUNTY OF VARVIOK, ENGLAND.
SCREW-DRIVER.
SPECIFICATION forming part of Letters Patent No. 308,247, lated November 18, 1884.
Application tiled December 7,1883. (No model.) I
.'l'o all whom t may concern:
Be it known that I, JOHN FREARsoN, of Birmingham, in the county of VVarWick, in the Kingdom of Great Britain and Ireland, have invented a certain Improvement in Screw- Drivers; and I do hereby declare the following to be be afull, clear, and exact description of the same.
My invention consists of an improvement, fully described hereinafter, in the screw-driver kfor which Letters Patent of the United States No. 179,695 were granted to me July 11, 1876, the main obj ect of my present invention being tov make a much stronger screw-driver than that described in said patent.
In the accompanying drawings, Figure 1 is a sectional perspective view of a screw-head to which the improved screw-driver is adapted; Fig. 2, a perspective view of the end of the screw driver; Fig. 3, a side View of the same; Fig. 4, a transverse section on the line 1 2, Fig. 3, and Fig. 5 a view illustrating the 'character of my patented screw-driver.
5 the screw-head described in the Patent No.
145,411, granted to nie December 9, 1873.
The screwdriver described in my aforesaid Patent N o. 179,695 has angular tapering ribs. substantially like those illustrated and marked with the letter B in Figs. 2, 3, andeL of the ac- 4( companying drawings, but each groove between the ribs terminated in a sharp corner,
:10, as shown in Fig. 5-a defect which my present invention remedies.
It will be observed that the bottom of each 4 groove A is rounded at m, so as to add great strength to the working end of the screwdriver. rPhe edges e as well as the sides f of the tapering ribs B converge to the point w, so as to fit snugly inthe orifice ofthe screw- 5( head, and the concave bottom m of each groove B is continued throughout the entire length of the working-head ofthe screw-driver, the concave bottom, however, tapering to the point w', where it disappears.
I claim as my invention- A screw-driver the working-head of which has tapering angular ribs B and tapering angular vgrooves A, rounded or concave at the bottom, as set forth.
In witness whereof I have hereunto signed my name in the presence of two subscribing witnesses.
JOHN FREARSON.
Witnesses:
J. KEENE,
53 Union Passage, Bmningham, y F. BRAME,
Union Passage, B'mfi'ngham.
US308247D John freaeson Expired - Lifetime US308247A (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3985170A (en) * 1974-08-17 1976-10-12 Marian Iskra Screwdriver
WO1984004481A1 (en) * 1983-05-06 1984-11-22 John Vaughn Improved high torque fastener and driving tool
US4589154A (en) * 1983-05-06 1986-05-20 John Vaughn Method and apparatus for forming the head of a high torque fastener
US4590825A (en) * 1983-05-06 1986-05-27 John Vaughn High torque fastener and driving tool
US20030093081A1 (en) * 2001-06-28 2003-05-15 Ortho Development Corporation; Interference fit screw driver
US20060112797A1 (en) * 2004-11-30 2006-06-01 Frank Zucker Universal screw driver blade for recessed cross-slot head screws
US20110079119A1 (en) * 2009-10-01 2011-04-07 Yu-Jyun Lee Screwdriver
US9512884B2 (en) * 2014-12-15 2016-12-06 Deere & Company Self-aligning axial drive coupling

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3985170A (en) * 1974-08-17 1976-10-12 Marian Iskra Screwdriver
WO1984004481A1 (en) * 1983-05-06 1984-11-22 John Vaughn Improved high torque fastener and driving tool
US4589154A (en) * 1983-05-06 1986-05-20 John Vaughn Method and apparatus for forming the head of a high torque fastener
US4590825A (en) * 1983-05-06 1986-05-27 John Vaughn High torque fastener and driving tool
US20030093081A1 (en) * 2001-06-28 2003-05-15 Ortho Development Corporation; Interference fit screw driver
US20060112797A1 (en) * 2004-11-30 2006-06-01 Frank Zucker Universal screw driver blade for recessed cross-slot head screws
US20110079119A1 (en) * 2009-10-01 2011-04-07 Yu-Jyun Lee Screwdriver
US9512884B2 (en) * 2014-12-15 2016-12-06 Deere & Company Self-aligning axial drive coupling

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