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Publication numberUS1501222 A
Publication typeGrant
Publication dateJul 15, 1924
Filing dateMay 18, 1923
Priority dateMay 18, 1923
Publication numberUS 1501222 A, US 1501222A, US-A-1501222, US1501222 A, US1501222A
InventorsCisco Lamp Sampson
Original AssigneeCisco Lamp Sampson
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Screw driver
US 1501222 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

' July 15 1924. 1,501,222

s. c. LAMP SCREW DRI VER Filed May 18. 1923 2 Sheets-Sheet l INVENTOR am @64 2 MM q WITNESS:

ATTORNEY S. C. LAMP SCREW DRIVER Filed May 18, 1923 2 Sheets-Sheet. 2

WITNESS: ATTORNEY Patented July 15, 1924. i



Application filed May 18,

To all whom it may concern.

Be it known that I, SAMPSON C. LAMP, a citizen of the United States, residin at Dawes, in the county of Kanawha and tate of West Virginia, have invented new and useful Improvements in Screw Drivers, of which the following is a specification.

particular application to a screw driver, the object being to provide a tool of this character including a movable section normally disposed centrally within the tool, but capable of being projected therefrom and held in position for use when desired, the movable section converting the tool into a small screw driver when projected to a position for use, while a similar tool of larger dimensions is provided when the movable section is in normal position.

The nature and advantages of the invention will be better understood when the following detailed description is read in connection with the accompanying drawings,

- the invention residing in the construction,

combination and arrangement of parts as claimed. I

In the drawings forming part of this application, like numerals of reference indicate similar parts in the several views, and wherein:

Figure 1 is a view in elevation of the tool forming the subject matter of this invention.

Figure 2 is a longitudinal sectional view therethrough.

Figure 3 is a view of the tool with the movable section or small screw driver extended for use.

Figure 4 is a transverse sectional view taken on the line 4-4 of Figure 1.

Figure 5 is a similar viewtaken on the line 5-5 of Figure 3.

Figure 6 is a detail view of the movable section or small screw driver.

Referring to the drawings in detail, 10 indicates the handle of a screw driver, which together with the shank 11 is of hollow formation for a purpose to be hereinafter described. In addition to this fact, the handle 10 is provided at opposite sides with bayonet slots 12. The working end of the tool is cut away as at 13. to receive the head or working end 14 of what I term a movable section, consequently a small screw driver as compared to the size of the tool proper is provided. The shank 15 of this mov- 1923. Serial No. 639,960.

able section, or small screw driver slides centrally through the tool proper and is normally maintained within the latter by means of a spring 16. A connecting pin 17 is connected with the shank of the small screw driver and this pin 17 projects through the bayonet slots above referred This invention relates to tools and has to As shown in Figure 2, the small screw driver is normally arranged with the head or working end thereof positioned in the cutaway portion of the working end of the main shank, and consequently a screw driver of a large size is provided for. In this position of parts, the pin 17 is arranged in the corresponding long branches of the bayonet slots. Now, when use of a small screw driver is desired it is only necessary to move the cross pin 17 longitudinally of the long branches of said slots, which projects the small screw driver to a working position beyond the end of the shank 11, and by subsequently turning the pin 17 into the short branches of said slot, the small screw driver is held in working position against the tension of the spring secured to the same. The small screw driver can be easily returned to normal position by turning the pin 17 in a reverse direction and arranging in the long branches of the slots.

While it is believed that from the foregoing description, the nature and advantages of the invention will be readily apparent, I desire to have it understood that I do not limit myself to what is herein shown and described and that such changes may be resorted to when desired as fall within the scope of what is claimed.

Having thus described the invention, 1


A screw driver having a hollow handle and a hollow shank providing the main therewith, and said auxiliary screw driver adapted to be moved into active position against the tension of said spring and dispose said pin in the short arms of the L 5 shaped slots to prevent casual turning movement of the auxiliary screw driver relative to the handle and to dispose the auxiliary screw driver beyond the working end of the main screw driver and at an angle relative thereto.

In testimony whereof I afiix my signature.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2417984 *Mar 22, 1944Mar 25, 1947Nadejda V AndrewsRetractile marking implement
US2431628 *Jul 27, 1942Nov 25, 1947Pheoll Mfg CompanyPilot slot screw and driving tool
US2604912 *Feb 4, 1949Jul 29, 1952Western Electric CoScrew driver
US2703716 *Sep 26, 1952Mar 8, 1955Harold S ForsbergSaw blade plunger and chuck assembly
US2813968 *May 26, 1955Nov 19, 1957Wood Jr Elwood SIlluminated screw driver
US4320544 *Oct 17, 1979Mar 23, 1982Bryant Floyd CCombination drill and screwdriver
US4328721 *Sep 10, 1980May 11, 1982Frank MassariPhillips screwdriver with retractable slotted screw driver blade
US4488462 *Nov 9, 1981Dec 18, 1984Wall Stanford JScrewdriver with dual tip
US5440947 *Dec 20, 1993Aug 15, 1995Manganelli; Robert J.Timing lock apparatus for diesel engines
US5526721 *Oct 11, 1994Jun 18, 1996Waisvisz; Eduard A.Tool having switchable pin-shaped tool elements
US5797302 *Nov 25, 1996Aug 25, 1998Khoury; Joseph F.Screwdriver adapted to be coupled to an electric drill for automatic rotation thereof
US7243688 *Jul 29, 2004Jul 17, 2007Intel CorporationDevice for reforming socket contacts
US7481138 *Jan 16, 2008Jan 27, 2009Joseph Powell ChapinAdjustable bit tool for driving screwdriver screws and bolts
US7736380Dec 21, 2005Jun 15, 2010Rhausler, Inc.Cervical plate system
US8037789 *May 21, 2009Oct 18, 2011Jonathan Paul TangerWall anchor installation device
US8770069Mar 23, 2011Jul 8, 2014Eric DraizinAutomatically-configurable screwdriver assembly
U.S. Classification81/439, 81/442
International ClassificationB25B15/00
Cooperative ClassificationB25B15/007
European ClassificationB25B15/00B2C