US1496270A - Piston-alignment-testing device - Google Patents

Description

June a, 1924. 1,496,270

J. P; JONES PISTON ALIGNMENT TESTING DEVICE Filed April 20 1921 Patented June 3, 19124.

JUDSONP. Jones. on sen Josn, oamsonnre.

IIS'l'ONwfiLIGNlEENT-EESTING DEVICE.

Application filed April 20, 192 Serial no! 482,395.

T 0 all whom it may concern:

Be'it known that I, Jonson P. Jones, a citizen of theUnited States, residing at San Jose, in the county of Santa. Clara and State of California, have invented new and useful Improvements in Piston-Alignment-Testing Devices, of which the following isa specification. p

This invention relates to improvements in devices for testing the alignment of pistons, particularly of internal combustion engines and its primary object is to provide a simple and inexpensive implement of this character which is constructed sothat it may be quickly and easily used in connection with pistons of various sizes and kinds to accurately test and determine the alignment thereof, the implement comprising right angular portions one of which is adapted to extend alongside of and engage a piston, while th other is rested upon a bar or mandrel to which the connecting rod of the piston is attached during the testing operation, said last named portion being of such construction that it will readily accommodate itself to and engage evenly upon bars and mandrels of various sizes.

Another object is to provide a device of the character described which is small, compact, may be stored in small compass and is constructed so that it may be quickly and easily put into accurate use.

The invention possesses other advantages and features some of which, with the foregoing will be set forth at length in the following description where I shall outline in full that form of the invention which I have selected for illustration in the drawings accompanying and forming a part of the present specification. In said drawings I have shown one form of the construction of my invention, but it is to be understood that I do not limit myself to such form since the invention as expressed in the claim may be embodied in a plurality of forms.

Referring to the drawings:

Figure 1 is a side elevation of the device of this invention showing as it will appear when in use and also illustrating a piston as it would appear when out of alignment.

Figure 2 is an end elevation of the device showing it resting upon a bar or mandrel.

Figure 3 is a top plan view of the device.

Referring to the embodiment of the in .vention which I have selected for illustration in the accompanying drawings, it will be seen that the instrument or device is similar in appearance to a carpenters square and is L-shaped.

The device comprises a body portion 1,

preferablyin form of a casting and of an inverted Jrshape. Attached to one end of thebody 'portionand extendingat right angles't-hereto isa bar 2 which is adapted in use'to extend along the side of the piston. The body 1 is provided upon its upper side with a suitable spirit level 3. Opposite sides of the body are cut away or notched as at 4 so as to facilitate handling the device and to eliminate weight and material from the body. One end of the body is reduced, extended forwardly as at 5 and recessed as at 6 so as to receive the lower enlarged end 7 of the bar 2. Suitable fastening elements 8 are inserted through portion 5 and end 7 to secure the bar to the body. The lower end of the bar engages with the inner or lower wall 9 of the recess and this wall extends at right angles to the forward edge of th bar. The upper edge of the body is provided longitudinally with a rounded rib 10 and the spirit level. 3 is mounted upon this rib. The lower edge of the portion 5 terminates above the highest point of the under face of the body so as to avoid contact with the bar or mandrel upon which the body is placed. The bar 2 is preferably in the form of a flat rectangular strip, such as a rule, and is secured so as to present an edge for engagement with the side of the piston. The sides of the bar may be provided with graduations or calibrations 11 for general measurement 7 purposes.

In use the piston 12 and connecting rod 13 are mounted upon a cylindrical bar or mandrel 14, the connecting rod 13 being clamped upon mandrel 14:. The mandrel is preferably mounted in a vise, not shown, and held in horizontal position with the connecting rod and piston extending substantially at rightangles thereto. The device of this invention is then placed with the body portion 1 resting upon the mandrel, as shown in Figures 1 and 2. and by use of the spirit level 3 the mandrel may be adjusted so that it is brought into true horizontal position with the bar 2 extending along the side of and engaging the piston on one side thereof, the piston is in proper alinement. It Will thus be seen that by reason of the'inverted V-shaped body 1, the

device may be quickly placed in. position upon a mandrel to test the alinement of the piston. By reason of the V-shaped body the proper fitting of the said body upon the mandrel, regardless of the size thereof, may be readily effected and the body will lie parallel to the mandrel at all times partly embracing the mandrel whereby the body is firmly and evenly seated.

I claim:

A device for testing alignment of a piston and a connecting rod secured thereto, said device comprising means for supporting said connecting rod and extending at right angles to said rod, an L-shaped instrument comprising an inverted \l-shaped body portion adapted to extend along and engage the connecting rod supporting means, said inverted V-shaped body having notches in opposite sides thereof and provided at one end with a portion to which the other part of the Lshaped instrument is attached, said other part of the L-shaped instrument being graduated and adapted to extend along the side of and engage the piston.

IUDSON P. JONES.

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