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Publication numberUS2550233 A
Publication typeGrant
Publication dateApr 24, 1951
Filing dateDec 11, 1947
Priority dateDec 11, 1947
Publication numberUS 2550233 A, US 2550233A, US-A-2550233, US2550233 A, US2550233A
InventorsDuncan James J
Original AssigneeDuncan James J
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Flashlight, fuse, and circuit tester
US 2550233 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

April 24, 1951 J. A.L DUNCAN 2,550,233


James J. Dunccm ATTE! R N EYE Patented Apr. 24, 14951 TENT OFFICE FLASHLIGHT, FUSE, AND CIRCUIT TESTER James J. Duncan, Flint, Mich.

.Application December 11, 1947, Serial No. 799,942

This invention relates to a combined electric ashlight and fuse or circuit tester.

It is an object of the present invention to provide in a flashlight an assemblage of parts so arranged that an electric current established by the batteries within the ashlight maybe delivered through a fuse or circuit to be tested upon the operation of one switch of the flashlight to cause the lamp to be placed in the circuit with the batteries so that a signal will be given after a circuit is completed through the fuse or circuit being tested.

Other objects of the present invention are to provide a combined flashlight or fuse orr circuitl tester, which is of simple construction, inexpensive to manufacture and efcient in operation.

For a better understanding of the invention, reference may be had to the following detailed description taken in connection with the accompanying drawing, in which Fig. 1 is a side elevational View of the testing flashlight which is of the shape of a slender. pencil type flashlight adapted for insertion in a coat pocket, portions of the device being broken away and shown in section,

Fig. 2 is a side elevational View of the combined flashlight and tester being applied to a lamp socket cord for the purpose of testing the circuit through the lamp socket, the cord plug terminals contacting with a ring and clip part of the device,

Fig. 3 is a top plan view of the combined nashlight and tester,

Fig. l is an enlarged sectional View, taken on line 4 4 of Fig. 1,

Fig. 5 is an enlarged sectional view taken on line 5 5 of Fig. 1,

Fig. 6 is an enlarged fragmentary view taken generally on line 6--6 of Fig. 3.

Referring now to the drawings wherein like reference characters denote corresponding parts wherein there is shown my pocket type iiashlight and tester. This tester and flashlight comprises a casing 5| of insulating material adapted to contain batteries 52 and 53. Over the rear of the casing 5| is a metal sleeve 54 to which is threaded a cap 55. A contact spring 56 extends between the cap and battery 53. Aboutthe front of the casing is a long metallic sleeve 51 to which is threaded a Ynozzle light retainer 58 having a hole 59 through which light rays are extended. The sleeve 51 supports an insulating member 6| which in turn supports a lamp bulb 62. This lamp bulb engages at its center with a terminait-3 of battery 52. A metallic terminal strip "6,4ufcontacts the bulb 62 and is secured to the insulating 1 claim. (C1. 175-183) 2 casing 5| through rivets 65 having Contact portions 66 and 61, Figure 6, on which slidable push button 66 may be imposed. The push button 6B upon being brought forward will automatically engage with the contact terminal 61 without having to depress the same. This action will cause the light to be turned on and remain so until the push button is withdrawn. Fixed to the metal sleeve 54 is a pocket clip 69 having contact with a ring 1| on the casing which is connected with the metal sleeve 51 through a conductor bar 12.

When the push button contact 68 is in engagement with the contact 61 current will flow through battery 52, lamp bulb 62, metal strip 64, Contact 61, push button 68, metal sleeve 51, bar 12, ring 1|, clip 69, metal sleeve 54, cap 55, spring 56, battery 53 and the battery 52.

When the device is used for testing, the push button 58 is moved rearwardly to a location over contact 66. When the push button is depressed engagement is made with the contact 66, Figure 6, and current will flow through the same circuit. The clip 69 is slidable on the sleeve 54 and can be withdrawn to the position shown in Figure 2 out of engagement with the ring 1i and an element to be tested is disposed in circuit relationship between the clip 59 and the ring 1| in the manner shown in Figure 2. This element being tested is in the form of a lamp socket as indicated at 13. The push button 68 is depressed against the action of its spring 14 when the test is to be performed.

While various changes may be made in the detail construction, it shall be understood that such changes shall be within the spirit and scope of the present invention as defined by the appended claim.

I claim:

In a testing flashlight, the combination which comprises a tubular casing of insulating material, a light bulb socket mounted in one end of the casing, batteries positioned in the casing with a center terminal of one of the batteries positioned for engagement with the terminal of a light bulb in the said socket, a metal sleeve slidably mounted on the end of the casing opposite to that in which the light bulb socket is positioned, a spring providing connecting means' between the metal sleeve and end of a battery, a clip carried by the metal sleeve and extended beyond the endV thereof to a point intermediate of the length of the casing, a metal band positioned on the casing spaced from the end of the metal sleeve andv positioned to be engaged by the extended end of the said clip, an inner bar con- 3 nected to the band by a rivet extended through the casing, a frame having an elongated slot therein positioned on the outer surface of the casing and with the intermediate part thereof spaced from the casing, a rivet connecting the frame to the said inner bar, a pair of terminals mounted in spaced relation in the casing and positioned under the slot of the frame, an inner bar connectedto said pair of terminals through the casing and extended to the light bulb socket, and a button slidably mounted in the slot of the frame and positioned to engage one terminal of the said pair of terminals to complete a circuit through the light bulb and positioned in spaced relation to the other terminal of the said pair of terminals when moved to the opposite end of the slot, said button'mounted to be depressed to engage the said other terminal to test a circuit, one terminal of which is in engagement with the band on the casing and the other with the clip of the slidably mounted metal sleeve with the said metal sleeve actuated to a position in which the end of the clip is spaced from the band.


REFERENCES CITED The following references are of record' in the le of this patent:

UNITED STATES PATENTS Number Name Date 1,637,472 Coote Aug. 2, 1927 1,845,764 Y Pryor Feb. 16, 1932 2,001,382 Faltico May 14, 1935 2,128,810 Fortine Aug. 30, 1938 2,156,319 Steele May 2, 1939 2,275,696 Stamps Mar. 10, 1942 2,324,661 Woodington July 20, 1942 2,401,366 Muldoon June 4, 1946

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1637472 *Jun 21, 1921Aug 2, 1927Coote Products CorpElectrical testing apparatus
US1845764 *Jan 12, 1931Feb 16, 1932Clarence E PryorCombined snap and testing switch for flashlights
US2001382 *Apr 27, 1934May 14, 1935Harold J FalticoTesting implement for spark plugs and ignition
US2128810 *Jan 9, 1937Aug 30, 1938Fortine Charles ECombined flash light and tester
US2156319 *Jun 26, 1937May 2, 1939Steele Walter RElectrical testing instrument
US2275696 *Aug 1, 1940Mar 10, 1942Samuel C StampsFlashlight tester
US2324661 *Aug 24, 1940Jul 20, 1943Woodington William ECombination flashlight and testing device
US2401366 *Feb 8, 1941Jun 4, 1946Henry HymanPortable electric flashlight
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2653296 *May 25, 1949Sep 22, 1953Western Electric CoMethod of testing multiconductor insulated wires
US3227948 *Apr 22, 1963Jan 4, 1966Walter C CheshireMulti-purpose flashlight structure
US4750095 *Aug 11, 1986Jun 7, 1988Huang Tien TsaiAuto-lighting flashlight assembly
US4905130 *Oct 19, 1988Feb 27, 1990Huang Tien TsaiFlashlight assembly
U.S. Classification324/507, 362/205
International ClassificationG01R31/02
Cooperative ClassificationG01R31/026
European ClassificationG01R31/02C4