GB621549A - Improvements in screw driver - Google Patents

Improvements in screw driver

Info

Publication number
GB621549A
GB621549A GB4693/47A GB469347A GB621549A GB 621549 A GB621549 A GB 621549A GB 4693/47 A GB4693/47 A GB 4693/47A GB 469347 A GB469347 A GB 469347A GB 621549 A GB621549 A GB 621549A
Authority
GB
United Kingdom
Prior art keywords
bit
stem
strip
slot
block
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB4693/47A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of GB621549A publication Critical patent/GB621549A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • B25B23/02—Arrangements for handling screws or nuts
    • B25B23/08—Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation
    • B25B23/10—Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation using mechanical gripping means
    • B25B23/105—Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation using mechanical gripping means the gripping device being an integral part of the driving bit
    • B25B23/106—Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation using mechanical gripping means the gripping device being an integral part of the driving bit the driving bit being a blade

Abstract

621,549. Screwdrivers. ESLICK, A. U. Feb. 18, 1947, Nos. 4693 and 4694. Convention dates, Feb. 20, 1946, and Feb. 4, 1947. [Class 61(iii)] A screwdriver provided with means to engage the face of the screw head so as to steady it during driving, comprises a tubular stem 1 in which a block 8 is urged outwardly by a spring 10 to an extent limited by a pin and slot 9, 7. The block carries the bit 4, which normally projects beyond the stem and engages in a slot 3 in the stem. In use, the bit is engaged in the kerf of the screw and, when pressure is applied, withdraws into the stem until the end 1a of the latter engages the face of the screw head. The bit may consist of two resilient strips splayed apart to grip the kerf, as shown, or may be a single strip. In a modification, Fig. 11, the two strips 14, 15 of the bit are carried by a pin 17 in a tubular upper part of the block 8 and extend into a slot 24a in a member 24 which is urged outwardly of the block 8 by a spring 25. The strip 14 is longer than the strip 15 and engages the pin 17 by means of an elongated slot 13, so that normally the member 24 acts to push the strip 14 outwardly to facilitate entry of the blades into the kerf.
GB4693/47A 1946-02-20 1947-02-18 Improvements in screw driver Expired GB621549A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US621549XA 1946-02-20 1946-02-20

Publications (1)

Publication Number Publication Date
GB621549A true GB621549A (en) 1949-04-11

Family

ID=22040560

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4693/47A Expired GB621549A (en) 1946-02-20 1947-02-18 Improvements in screw driver

Country Status (1)

Country Link
GB (1) GB621549A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1013588B (en) * 1953-03-23 1957-08-08 Walter Finkeldei Fa screwdriver

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1013588B (en) * 1953-03-23 1957-08-08 Walter Finkeldei Fa screwdriver

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