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Publication numberUS2670427 A
Publication typeGrant
Publication dateFeb 23, 1954
Filing dateFeb 12, 1951
Priority dateFeb 12, 1951
Publication numberUS 2670427 A, US 2670427A, US-A-2670427, US2670427 A, US2670427A
InventorsBarlet Stewart J, Whitmore Allen H
Original AssigneeBarlet Stewart J, Whitmore Allen H
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Illuminated screw driver
US 2670427 A
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Description  (OCR text may contain errors)

Feb- 23, 1954 s. J. BARLET ETAL ILLUMINATED scREw DRIVER Filed Feb. 12, 1951 BYf/W/ef? HMH/770m? Patented Feb. 23, 1954 ILLURIINATED SCREW DRIVER Stewart J. Barlet and Allen H. Whitmore, Los Angeles, Calif.

Application February 12, 1951, Serial N o. 210,594

(Cl. Z110-6.46)

2 Claims.

This invention relates generally to the class of tools and more particularly to screw drivers.

A particular object of the present invention is to provide an improved illuminated screw driver wherein the screw engaging, or bit, end is in the form o1 a hollow head housing an incandescent lamp, suitable light openings or windows being provided for the projection of the light rays onto the head of an engaged screw.

Another object is to provide an illuminated screw driver wherein the handle provides a casing for electric batteries, and the means for closing the electric circuit with the batteries and lamp therein comprises a screw which, when adjusted to one position keeps the circuit closed while the tool is in use.

Other objects and advantages cf the invention will become apparent as the description of the same proceeds and the invention will be best understood from a consideration of the following detailed description taken in connection with the accompanying drawing forming a part of the specification, with the understanding, however, that the invention is not to be limited to the exact details of construction shown and described since obvious modications will occur to a person skilled in the art.

In the drawing:

Figure 1 is a view partly in side elevation and partly in longitudinal section of a screw driver constructed in accordance with the present invention.

Figure 2 is a sectional view, on an enlarged scale, taken substantially on the line 2-2 of Figure l.

Figure 3 is a View looking at the end of the bit and showing the light emitting openings.

Referring now more particularly to the drawing the numeral l designates the handle for the tool, which, as shown, is in the form of a long hollow, or tubular shell forming a casing l2.

At its forward end the handle is tapered, as at lil, forming a central axial opening i6. The back end of the handle has a cap I8, which closes the shell and is held in position in the manner about to be described.

The interior of the shell is lined with the sleeve 2li, of metal. This sleeve at the back end projects beyond the shell end and is externally threaded, as at 22, for threaded engagement by the cap I8, which is also of metal.

The cap I8 has a disk or washer 24, therein which is of insulation material and prevents the bottom end, or metal casing portion of the electric battery 25 from making electric contact with the cap.

The center of the cap I8 has a threaded bore 2B therethrough, in which is threadedly engaged the circuit closing screw 3l), which passes through an opening in the center of the disk for contact with the end of the battery.

The handle is designed to house two batteries as shown and at the forward end thereof there is fixed within the tapered part Illa cf the liner, an insulation body 3l, in the inner end 0f which isA xed a metal terminal 32, which is attached to an end of a current conductor 33 which passes forwardly through the body 3l. The center terminal of the other battery engages this terminal 32, as shown.

Forming an integral continuation of the 'tapered forward end Ma of the sleeve 20, is the long tubular shank3ffsl of the screw driver, the forward end of which joins the axially extended socket 35, of enlarged diameter.

In the forward end of the tubular shank is xed a body, or plug, of insulation 36, in the forward end of which is carried a metal terminal 31. To this terminal is attached the other end of the conductor 33.

The forward end of the socket 35 is open and fitted tightly in the socket in the threaded sleeve 38, in which is threaded the base of an incandescent lamp 39, the glass, or bulb, part of which projects beyond the end of the socket.

Upon the outer side of the socket are formed a pair, or more, of lugs 40, here shown as being elongated longitudinally of the socket as at diametrically opposite positions thereon.

The numeral 4| designates a head of cylindrical form, in which is received, from one end, the socket 35.

From the open end in which the socket 35 enters, the wall of the head has in the inner surface thereof, the longitudinal slots l2 in which the lugs d are tightly, frictionally engaged.

The forward end of the head is closed by the rounded wall 43 which covers the light bulb 39 and projecting forwardly from this wall is the bit, or blade, 44! which engages in the kerf of a screw, not shown.

On opposite sides of the bit M, are apertures, or windows, 35 through which light passes from the bulb to illuminate the bit and the article with which it may be engaged.

It will be readily apparent from the foregoing that when the switch screw 33 is threaded inward into contact with the end of the shell of the ad- 3 jacent battery, the necessary electric circuit will be established to energize the light 39.

We claim:

1. An illuminated screw driver comprising a long hollow handle forming a battery housing, a metal sleeve lining the handle and projecting from the back end thereof, a metal cap secured on the projecting end of thel sleeve and closing said endaofthe'handle. an elongate tubular driver shank forming an integral continuation of the sleeve and extending from the other end of said handle, said shank having a portion of its for# ward end enlarged in diameter to` form" a lighte bulb receiving socket open at its free end, an electric terminal in the bottom of the socket for contact with one side of said bulb, the other'side of4 the bulb being grounded to the' socket, means for conducting current to said terminal from one side of a battery in the handle, a hollow cover for and secured to the open end of the socket, a, screw driver bit' extending fromsaid. cover, said cover having forwardly directed light emitting; openings at! opposite sides of and in close proximity tol'the working edge of thebit, andswitch means for? groundingIv the otherside ofV said battery.

2l An illuminated screw driver comprising a hollow handle for housing a battery, an elongate hav-ing'oneiend. xed' to said handle and having 'itsother end enlarged to provide an elongate-cylinder'open at' its forward end and formngan-incande'scent" bulb socket, an electric cur- 4 rent terminal in the bottom of the socket, means for conducting electric current to said terminal from one side of a battery in the handle, means for securing an incandescent bulb in the socket with one side in contact with said terminal and the other side grounded to the shank, an elongate hollow head cylinder having an open end in which is slideably received said bulb socket cylinder, the other end ofi the headcylinder being closed by an end'wall, a screw driver bit forming an integral extension of said end wall, means for grounding the other side of said battery, means for discharging light rays from a bulb in said socket onto opposite sides of the screw driver bit, said last named means comprising apertures iny said end wall on opposite sides of and adjacent. to.-the,bit,.outstanding lugs formed longitudinally of the outer side of the first cylinder, and slotsI formed in and longitudinally of the inner wall of said head to slideably frictionally receive saidlugs..



References Cited in. the le of this patenty UNITED' STATES PATENTS Number Name Datel 1,603g985' Rosenberg Oct; 19, 1926 1,635,933 Genoves July 12, 1927 1,868,778 "Iomney July 26, 1932 2,477,498 Springs, Ji'. July 26, 1949

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1603985 *Jul 31, 1925Oct 19, 1926Herman HoffmanIlluminating screw driver
US1635933 *May 25, 1926Jul 12, 1927Vincent GenovesIlluminated screw driver
US1868778 *May 22, 1930Jul 26, 1932Tomney Charles CIlluminated tool
US2477498 *Aug 29, 1947Jul 26, 1949Springs Jr Melvin RInspection light and electromagnet combination
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2797308 *Jan 16, 1956Jun 25, 1957Best Morton PThermometer case with built-in light unit
US2813968 *May 26, 1955Nov 19, 1957Wood Jr Elwood SIlluminated screw driver
US2855679 *Nov 8, 1955Oct 14, 1958Howard G GibbleGage attachment for drills
US3592199 *Feb 9, 1970Jul 13, 1971Medical Products CorpAutoclavable surgical instrument illumination
US3831276 *Jul 31, 1973Aug 27, 1974Dalton WConvertible swivel knife which illuminates work area
US4253357 *May 31, 1979Mar 3, 1981Lane Don WScrewdriver accessory
US5124893 *Oct 25, 1991Jun 23, 1992Jeng Jong PyngScrew driver having illuminating means mounted thereto
US5168780 *May 22, 1991Dec 8, 1992Gennep Jan VanTool driver with a detachable handle having a light
US5826969 *Sep 2, 1997Oct 27, 1998Nevin; DonaldIlluminating screw driver
US5921673 *Nov 13, 1997Jul 13, 1999Habel; David M.Illuminated threading tool
US7510296 *Jan 3, 2008Mar 31, 2009Donald NevinLED illuminated screwdriver
US8118444 *Jul 7, 2008Feb 21, 2012Donald NevinLED illuminated tool
U.S. Classification362/120, 81/436, D08/87
International ClassificationB25B23/00, B25B23/18
Cooperative ClassificationB25B23/18
European ClassificationB25B23/18