US2607829A

US2607829A - Portable testing device

Info

Publication number: US2607829A
Application number: US151683A
Authority: US
Inventors: Herbert L Tipperman
Original assignee: Individual
Current assignee: Individual
Priority date: 1950-03-24
Filing date: 1950-03-24
Publication date: 1952-08-19
Anticipated expiration: 1969-08-19

Description

Aug. 19, 1952 TIPPERMAN 2,607,829

PORTABLE TESTING DEVICE Filed March 24, 1950 35 FIGQZ" JNVENTORQ 28 HERBERT L'. TIPPERMAN Patented Aug. 19, 1952 Herbert L'. Tipperman, Brooklyn, N. Y. Application March 24, 1950, Serial No.:151,683

'1Claim. (Cl.17-183)- This invention relates to a portable electrical testing device adapted to be combined with a flashlight.

It is an object of this invention to provide a testing instrument capable of performing simple, continuity, resistance and voltage tests as a self contained portable device combined with a flashlight and capable of being manufactured simply and economically.

It is a further object of this invention to provide a device of the character indicated wherein means are provided for storing and carrying the test leads used in connection with the performance of the above mentioned tests.

An additional object of this invention is to provide a flashlight with means readily attachable thereto to form part thereof for the purpose of performing a variety of tests, said means being readily interchangeable in order to adapt the device to a variety of testing situations which may he encountered.

Other and further objects of this invention will become apparent from the description thereof contained in the annexed specifications, or will otherwise become obvious. It will be understood that the invention herein disclosed may be employed for other purposes to which the structure and arrangement are adapted.

Figure v1 is 'an elevational view of the device comprising the present invention partly broken away,

Figure 2 is a cross-section of Figure 1 taken along 22,

Figure 3 is a fragmentary view of the switch arrangement showing the test leads plugged into position, and

Figure 4 is a cross-section of the lower portion of Figure 1. Y p

. As shown in. Figure 1, the invention comprises a flashlight ofv substantially conventional construction'housed in a cylindrical casing H preferably molded or otherwise formed of non-conductivematerial. Supported at one end of casing l I is 'a lens and lamp assembly which may advantageously be detachably secured thereto as by means of threaded collar [2. The lensassembly' comprises a lens l3 and a reflector element H which is provided with 'a socket l5 adapted to receive theconventional flashlight type incandescent bulb or lamp [6. Flashlight cells I! and 18 of conventional type are shown positioned within the casing. The center terminal of the upper cell l1 contacts the center terminal of lamp H5 in conventional manner. The cells are securely held within casing I I by means of sleeve I9, as more clearly appears from Figure 14. shown in said figure, sleeve I9 is pro vided with an internally threaded portion adapted to 'be cooperatively engaged with the ex-'-.

ternally threaded portion of casing ll. Sleeve I9 is additionally IpI'OVldBd with a transverse wall 20. Helical spring 2|, of conductive mate-l vrial, is interposed. between the bottom terminal of cell l8 and wall 20, thereby resiliently urging the cells into contact with each other as well as withthe center terminal of lamp I6. The lowest convolution of spring 2|. contacts conductor 22 and completes the electrical circuit to one terminal of switch 23. Switch 23 is ofconventional type and is provided with a slide element-.14 which selectively completes or interrupts the conductive path between conductors 22 'and 25. The'latter conductor is electrically connected to the screw threaded portion of the lamp socket carried by reflector l4 thereby completing the circuit from the base of cell I8 to the outside or screw terminal of the lamp. The flashlight op erates in conventional manner; the .lamp thereofjbeingilluminated upon the closing of switch 23 to complete the circuit.

Jacks 26 and 21' which may advantageously be of the pin type are provided in physical abutment with the end portions of

conductors

22 and 25 thereby making electrical contact with each of them. The jacks extend through the switch housing and open to the exterior of casing ll, thus providing means for making electrical contact with the ends of said conductors externally of the casing. The electrical contact is made by means of test leads 28 which are provided with plugs adapted to be inserted into said jacks. Figure Bis a iragmentary view of the switch portion of the casing and shows test leads 28 plugged into position in said pin jacks.

When switch 23' is in open condition and the test leads are. plugged into said jacks, the flashf light lamp will be illuminated upon the completion of .theelectrical circuit through the test prod the testlead plugs; such jacks may be eliminated and perforations drilled or formed in the nonconductive material of the casing. The perforations are formed in the same location as the jacks. In the event that such perforations are utilized the plugs when inserted abut directly against

conductors

22 and 25 thereby making electrical contact with each of them. The use of said perforations accomplishes a result similar to that achieved by the jacks'but in a more economical mannerin the elimination of the cost and assembly of the additional elements.

As shown in Figure 4, the bottom closure for casing H is comprised of the assembly termed by sleeve l9 and end cap 29. The sleeve and end cap are formed of a material similar'to that of the casing. One end of sleeve I9. is threadedly engaged with the bottom end of casing H; the other end of said sleeve being threadedly engaged with end cap 29. Sleeve I9 is also provideo with. tran verse wa s mo eolearly appears from Figure 2. end cap 29 is provided with jacks 30, 3| and 32. The jacks areadapted to receive and make electrical contact with the plugs formed. on the ends of test-leads 28.

Test lamps

33 and 34 are suitably secured within end cap 29 as shown diagrammatically in Figure 2. The. test lamps may be of varying voltages such as six, twelve, twenty-four or one hundred and ten volts of conventional filamentary type or one .Q said la ps ma e of n on type- It has been found advantageous touse one. six volt filament type lamp in combinat n with a neon bulb or general el c cal testin u s s.-

The combination of lamps may be variedv in accordance with the general character of th tes fiior which the device. is intended t be used.

The lamps may be m un he end cap by t use .of lamp sockets so as to permit their ready replacement or the lamp terminals may be soldered directly to the leads connecting to the jacks. In the event of the use of a neon bulb a suitable resistor may be inserted in series therewith. The lamps are suited for voltage tests.

into t e c mbinatio of jacks .30 and ,3! o jacks 3.! and 3. It w ll be understood t t a r a r number pf lamps with associated jacks may be utilized if desired. Perforations 35 are provided the bottom wall of end cap 29 for the purpose of ma n he n ition f u i at o 'o the lamps visible during a test. s

It. will be noted that by reason of the arrangement herein provided the transverse wall 20.. in sleeve l9 sets off a compartment withinsleeve l9. T is c mpartment orms a stora a e r th purpose of receiving and storing test lead 28 when not in use as more clearly appears in Fig.- e y reason of this arran ement the entire testing device and equipment isseli contained and may be readily and conveniently transported intact. The sleeve and end cap arrangement is adapted to be secured to flashlight of similar construction which are adapted to cooperate with screw threaded portion of the sleeve.

It should be noted that

test lamps

33 and 34 may each be inserted in series circuit with the batteries of the flashlight when desired by plugging a test lead across from jack 3| to jack 26 a d then u in i ok n coope ation with either jack 30 or 32 for the'purpose of receiving the test leads to be connected to the circuit of device under test.

.1 have here shown and described a preferred embodiment of my invention. It will be apparent, .however, that this invention is not limited to this, embodiment and thus many changes, additions and modifications can be made in connection therewith without departing from the spirit and scope of the invention as herein disc os d a d hereinafter claimed- I cla m:

An electrical testing device comprisi1 1 g ,a flashlight including a casing adapted to receive one or more-electrical cells, a switch and a housing efor f r d of i su a ing material o said casing, conductors connected to said switch, one of said conductors being connectedto a cellterminal, an incandescent lamp supported at one end of Said i e a d. conne ted wit h oppo ing e minal o a ce l as Well a t t e ot o a d on uc or a e ture .f rrn d in the w h us n ad acent. o said. conductors. said apertures. being ad pted to de achably receive the ends oi co ductin te tin elements and to hold sai ends ele trical contact with said conductors, a sleeve adapted to have one. of. its ends secured to the other end of said casing, a transverse wall formed in said sleeve, an end cap adaptedto be detachably secured to the other end of said sleeve to form a compartment there.-. with adapted to receive and store said testing elements, testing lamps secured within said compartment, electrical receptacles formed in one of the walls of said compartmentadapted to detachablyreceive the ends of said conducting testing elements, apertures formedin one of the walls of said compartment to permit said lamps to be ie d from the exterior thereof.

:L. 'IIPBERMAN;

REFEBENQES .QI ED The following references are of recordin t file of this patent: