US1891141A

US1891141A - Testing device

Info

Publication number: US1891141A
Application number: US451471A
Authority: US
Inventors: Louis J Combe
Original assignee: Individual
Current assignee: Individual
Priority date: 1930-05-10
Filing date: 1930-05-10
Publication date: 1932-12-13
Anticipated expiration: 1949-12-13

Description

Dec. 13, 1932. L J COMBE 1,891,141

TESTING DEVICE Filed May lO, 1930 am fz ambe,

INVENTOR ATTORNEY Patented Dec. 13, 1932 Louis J. ooMBE, oF Los ANGELES, `Garaneinem TESTING DEVICE Application led May 10,

My present invention relates to improvements in internal combustion engine testing devices.

My primary object is the provision of a n testing device for testing the cylinders of internal combustion engines in such way as to positively tell which of the cylinders are in perfect working condition. f

A further object is the provision of a testing device which is designed to be suspended from the connecting rod between the radiator and the front of the body of an automobile and which has electric conductors connected therewith and provided with clips for l5 clamping on certain of the spark plugs of the engine to short circuit such spark plugs, the clip of one of such conductors, however, being attached to a headbolt or otherwise Welded on the motor block so that the working of the 20 cylinder to which the ground clip is not ato ytached can be ascertained without the removal of the spark plug therefrom, it being understood that the remaining cylinders are tested in the same manner. l

-A still further object isthe provision of a testing device for this purpose that comprises a flexible member which may be readily bent so that the same can be easily positioned in the toolbox of the machine.

To the attainment of the foregoing the invention consists inthe improvement hereinafterdescribed and deinitely claimed.

In the drawing:

Figure 1 is a side elevation of a sufficient portion of an automobile to illustrate theapplication of my improvement thereon, parts being broken away and parts in section.

Figure 2 is a perspective view of the improvement per se.

Figure 3 is a side elevation of the improvement with parts in section.

In Figure 1 of the drawing the numeral 1 d esignates the motor of an automobile, 2 the spark plugs and 3 the brace rod which is secured between the radiator and the front of the body of the automobile. n

My improvement comprises a iexible tubular head 4: of insulating material. The head 4L, being flexible is susceptible toV bending so '50 that the same can be folded into a small size 1930. serialfno; 451,471;

which can be readily accommodatedin a machinists work box. `Secured to the top of the head, at points equidi'stant from the ends thereof, there is a pair of outwardly extending stems 5 which merge into-hooks 6. The 55 stems are of insulating material and are preferably centrally reinforced by wire-members 5 as disclosed by Figure 3 vofthe drawing, the wire members having their ends embedded in the head land the stems 5 may be integrally 50 formed with the said headL 4 or otherwise fixedly secured thereto. The hook-carrying stems are also flexible so that the same may kbe bent against the hea-dpto produce a small pack-V age when the deviceis `not infuse.

Received in the headpand tightly coinpressed .y therein there L,are the insulating sheathings 7 for wire conductors 7, yOne of the conductors extends entirelythrough the sheathings in the head, and the said sheathings orinsulating coverings are broken away or divided at points so that the intermediate wires 7 maybe wound aroundand solderedtothe longitudinal wire that extends entirely through the headl as disclosed by Figure 3 of the drawing. The insulatingsheathings for the central or intermediate wires may be formed vwith or otherwise secured to the head A as is also disclosed by Figure 3 of the drawings while the sheath- S0 ings that project throughy the ends of the head are extended for the same length as the intermediate sheathings and all the conductor wiresv have their ends connected to y spring metal clips 8 of the ordinary construc- 55 tion. The sheathings or insulating covering 7, as well as the wires therein are flexible so that the same may be folded against the head when the device is not in use, and whereby the mPOVemeD' may be Conveniently 90 stored in the tool box of the mechanic.

Any desired number of conductors 7 may be provided in accordance with the number of cylinders in the engine to be tested, four of such conductors and clips being disclosed by the drawing as the motor 1 is of the four cylinder type. To test say the first cylinder, three of the clips are attached to three of the spark plugs and the fourth clip is attached to one of the head bolts 9 for' the motor. As 550 three of the spark plugs are short circuited and ground to the bolt 9 the Working in the first cylinder can be readily ascertained by listening to the operation thereof without necessitating the removal of the spark plug. In a like manner by detaching other clips and grounding one ofthe clips the working in the remaining 'cylinders 4may be also ascertained Without removing the spark plugs, it being apparent that the clips may be attached to or detached from the engine or from the spark plug Without imparting an electric shock to the operator.

It is believed the simplicity of the improvement as Well as the advantages of the device will be apparent and further detailed description will not be required. y

Having described the invention, I claim:

lA testing device for the spark plugs of in ternal combustion engines of automobiles, comprising a tubular head of lexibleand in'- sulatingpmaterial, reinforced stems of flexible and insulating material projecting from the head and merging into hooks, a conductor wire having'a sheathing of flexible and insulating material compressed in the head and having end portions extending throughboth ends of the head, said Wire having uncovered ends, spring metal clips fixed on the uncovered ends of said `Wire, intermediate conductor wires connected to the first-namedwire, slieathings of flexible and insulating material for said intermediate Wires connectedto the head, the llength of said intermediate Wires being approximately equal to the length of the endportions of the yfirst-named wires which extend beyond theends of the head, vsaid yintermediate Wires having Atheir outer'ends uncovered, and spring metal clips fixed on said uncovered ends ofthe Wires.

Initestimony whereof I aiiix my signature.

vLOUIS J. COMBE.