US1463015A - Actuating device and method of making the same - Google Patents

Description

July 24, 1923- 1,463,015

E. J. GUAY ACTUATING DEVICE AND METHOD OF MAKING THE SAME Filed Nov. 4, 1919 H is A ttor-ney.

Patented] July 2541, fiSZE.

MILE J. GUAY, OF LYNN, MASSACHUSETTS, ASSIGIN'OB TO GENERAL 1 f vi PANY, A CORPORATION OF NEW YORK.

ac'rua'rme DEVIC AND mn'rgnon or Maximo THE SAME.

Application filed November 4, 1919. Serial No. 885,775.

To all whom it; may com-em:

Be it known that I, EMILE J. GUAY, a citizen of the United States, residing at Lynn, county of Essex, State of Massachusetts, have invented certain new and useful Imrovements in Actuating Devices and ethods of Making the Same, of which the following is a specification.

As is generally appreciated great efforts are being made at the present time to reduce unnecessary noises, and especially is this true as to the present type of automobile engines. Such an engine has a good many valves, at least two for every cylinder, and these valves are actuated by cams either directly through push rods or through push rods and levers. A certain amount of clearance must always be left between the actuating part and the valve stem to ensu're'the proper seating of the valve when the cam moves from its active to its inactive position. This clearance, although small, gives rise to considerable noise when the actuating part is rapidly moved into contact with the valve stem. It is in the nature of a hammer blow delivered at high speed to a part which has considerable inertia. When the parts are properly set or adjusted the noise is not particularly objectionable in many cases, but it becomes so as soon as parts wear or get out of adjustment which they do rather rapidly.

I have invented or discovered a means whereby this noise can be prevented even after the engine or other mechanism has been in operation for a long time. I am also able to use larger clearances than are customary in the valve mechanism of engines without causing objectionable noise, which is advantageous because it ensures the proper seating of the valves at all times.

For a consideration of what I believe to be novel and my invention, attention isdirected to the accompanying description and claims appended thereto.

In the attached drawing, which is illustrative of my invention, Fig. 1 is a partial section of a gasolene.engine; Fig. 2 is a view in elevation of an actuating mechanism such as is employed in gasolene engines of the L -head type and which may be taken as illustrating the general application of my invention; Fig. 3 is a view of the means employed in carrying out one of the steps in the process of manufacture; Flg. 4 illustrates a later step in the process; Fig.9 shows a. shell or tubular'container after it has been filled with spinable textile fibers; Fig. 6 shows the shell after it has been partially swaged to increase the compression of 0 the said fibers, and Fig. 7 is a sectional view of a finished device illustrating one form of my lnvention.

In carryin' body of higlfi fibers which is surroundedby a metallic shell, the wall of said shell holding the material in its compressed state b sidewise pressure, which shell is afterwar mounted in a suitable holder. fibers are available for the purpose. Of them my experience shows that asbestos 0f the grade commonly employed-in weaving fire curtains for theatres is-entirely Satisout my invention I employ a factory. I may also use asbestos of a somewhat inferior grade containing a certain limited amount of cotton or equivalent material provided the fibers are of reasonable length. I have also found ordinary cotton used in weaving cloth and garments entirely satisfactory, since both the asbestos and the cotton are characterized by the resence of relativel long spinable fibers. uch fibers can be ighly compremed without injury' and in addition to their sound-deadening property are not injured by oil either hot or cold. They will successfully withstand high temperatures and the material when properly compressed. can be machined by ordinary methods much the same as iron and steel.

- It is essential to the successful operation of my invention that the fibers be highly compressed and, if the best results are to be obtained, the fibers should extend lengthwise of the shell and resent their ends to the cooperating metallic part which is to be actuated. To avoid the sound incident to the contacting of two metallic surfaces care should be exercised to see that of less steel tubing, this can be readily done by making the wall of the shell slightly shorter than the axial length of the material at the center. The simplest and best way to carry out the invention is to insert the fibers in an open-ended tube and subject them to a pre y compressed spinable textile 65 A variety of textile liminary compression the final compression being attained by re ucing the size of the tube. In other words, the compression pressure is exerted in a direction perpendicular to the axis of the tube and to the general direction of the fibers.

One of the chief problems in making my proved construction is first to get the fibrous material into the shell or tube and second to compress it. A simple and satisfacto way to do this is illustrated in Fig. 3 in w ich two hooks or frames 10 and 11 are provided. The hook 10 ismade fast to any suitable device such as the tail stock 12 of a lathe and the hook 11 to some part as the ro tating head 13. The tube 141s first slipped back over the hook 10 so as to expose it. spinable textile fibers, such as asbestos, cotton or the like in the form of sliver 15, are then wound over the hooks until a suihcient quantity is rovided. The head carrying the hook 11 is tiien rotated which twists the body thus formed and at the same time gives it.

considerable compression as shown in Fig. 4. The tube 14: is then slipped endwise over said body to hold it in its compressed state with the fibers extending longitudinally of the tube. After the tube is in place the tension is released b rotating the book 11 backwardly and t e material is out between the ends of the tube and the hooks. it is not practical to get the necessary heavy compression in this manner so the tube with its filler is either put through successive dies of decreasing size or it is swaged. The swaging process is preferable because it is less liable to break the fibers and is also less expensive. The swaging can be done in an ordinary swaging machine and should be by succes-' sive operations so as to reduce the size of the shell rather gradually and thereby avoid undue strains on the fibers which would tend to break them.

A reduction in diameter of the tube of about one-eighth to five-thirty seconds of an inch for each operation of which at least two are generally required will be found to be satisfactory. This swaging operation has the efiect of highly compressing the fibrous material by exerting heavy-sidewise pressure thereon, the ends being left free. As the swaging takes place there is a; certain small amount of relative movement between the fibrous material and the tube. As a matter of fact the tube slides over the material to a certain extent and'when the operation is finished the ends of the tube project somewhat beyond the fibers. The swaging operations somewhat elongates the tube as well as reduces its diameter. in addition the walls of the tube are made somewhat thicker due to the reduction of diameter. At this stage in the process the fibrous material is very highly compressed and is therefore very dens a ha d Owing; 'l'i wever t he na -which is pivoted on theshaft 25.

outerend of the arm is attached a push rod 16 in Fig. 7. The ends of the tube section-is v beveled back as at 17 and the fibrous material sli htly crowned as at 18 so that the center wi 1 be the highest point. My invention is capable of wide applica tion where it is desired to decrease nolse and the shock of two meeting surfaces, particularly where one of the parts has considerable inertia and has to be quickly started from a position of rest. A particularly useful field for my invention is found in the various types of automobile engines where the cams have to open-the valves with great rapidity. In Fig. 1" is shown an engine of the valve in the head type in which 19 indicates a portion of a cylinder and 20 a valve. The valve is located in a suitable cage with its stem 21 rising vertically. On the stem is a collar 22 for confining the closing spring 23 under pressure. 24 indicates a rocker arm To the 26 the lower end of said rod havin a roller which rides on the valve actuatnr in the usual manner. Carried by e:

end of the rocker arm and in alignment with theff valve stem is one of my in constructed as shown in with a suitable lock-nut. improved device can be mounted on the valve stem or on the rocker .12 but thepreterred arrangement is to mount it in the arm. An

U yvdflz. otner may to o 1 is 1S s can in 1g. 1n which 28 indicates a part to be actuated and 29 the actuating part. Between the two is a i ovided As is evident my member constructed as-shown in Fig. 7 in which 30 represents a screw having a threaded shank and hexagon head 31 which is recessed or socketed to' receive the short length of tube with its filler of fibrousmaterial, the whole forming a holder capable of being mounted for use in a variety of ways and for a varietyof purposes. The portion of the head adjacent the upper end of the tube is rolled over said tube so as to form a good securing means. It will be observed that the fibers are held in compression by the wall of the tube and that the bottom of the tube and the filler rest firmly on the bottom wall of the socket, the filler at the top being free and slightly. rounded or crowned so as to prevent a metal-to-metal contact when the parts are actuated. On account I of being threaded the screw can readily beadjusted' up and down to give the necessary, clearance between the cooperating parts, a check nut being employed to lock the parts in adjusted position. The usual clearance may be employed between said parts, but owing to the use of spinable textile fibers which prevent a, acre noise a greater clearance can be provided than is ordinarily ermissible with metal-tometal arts and t us the proper seating of the va ves is assured.

It is preferable to make up the materlal in pieces of considerable length since a considerable saving of labor and material is thereby efiected but each device may be made separatel if for any reason it is necessary or desire le.

An automobile engine fitted with my improved construction has been exhaustively tested with the result that the noise due to the valve actuating parts is eliminated. I have also found that the wear on the contacting surfaces is reduced to a negligible amount. The wear on the textile fibers when properly compressed is about the same as that of steel.

What I claim as new and desire to secure by Letters Patent of the United States, is,--

1. A device of the character described, comprising a body of spinable textile fibers and a shell which surrounds said fibers and holds them under compression, said shell being open at one end whereby the ends of the compressed fibres are exposed to present a working surface.

2. A. device of the character described, comprising a bod of spinable textile fibers and a metallic s ell which surrounds the fibers and holds them in a highly compressed state, said fibers extending lengthwise of the shell and presenting at one end of it a hard working surface;

3. A device of the character described, comprising a body of textile fibers and a metallic tube surrounding said body and having an open end, said tube exerting heavy pressure on said body in a direction perpendicular to its axis.

4. A device of the character described, comprising a body of spinable textile fibers and a metallic shell which surrounds the body circumferentially and highly compresses the fibers, the fibres at one end of the shell presenting a hard working surface.

5. A device of the character described, comprising an open-ended metallic shell containing a body of fibrous material which is maintained in a high state of compression by the walls of said shell, said matenal projecting slightly beyond the shell at one end to provide a working surface.

6. In combination, a part which is to be moved, a second part for moving the first, and means interposed between said parts comprising a shell containing a body of compremed fibrous material, the action of one part on the other taking place through said material.

7. In combination, a part which is to be moved, a second part for moving the first, and means interposed between said parts and through which one acts on the other comprisin a shell containing a body of comressed fi ers in which said fibers extend engthwise of the shell and present their ends to one u f the parts.

8. A. device of the character described, comprising a shell which surrounds a body of fi ers and holds them under compression by exerting sidewise pressure thereon, and a holder for said shell.

9. A device of the character described, comprisin a tube which is filled with spinable texti e fibers extending lengthwise thereof and held under heavy compression by the wall of the tube, and a holder for said tube.

10. A device of the character described, comprising a tube which is filled with spinable fibers extending lengthwise thereof and held under heavy compression by the wall of the tube. and a holder containing a socket in which the tube and its filler are seated, said filler extending slightly beyond one end of the tube.

11. The method of making devices of the character described which comprises filling an elongated shell with spinable textile fibers and compressing the same by reducing the size of the shell.

12. The method of making devices of the character described which comprises filling a shell with spinable textile fibers and subjecting the same to a reliminary compression, and increasin t e compression to a high degree by re ucing the size of the shell.

13. The method of making devices of the character described which comprises filling a tube with fibers arranged lengthwise and in a somewhat compressed state, and increasing the compression by reducing the size of the tube by successive steps.

14. The method of making devices of the character described which comprises filling a tubular shell with spinable textile fibers and subjecting the same to compression by reducing the size of the shell by successive swaging operations.

15. The method of making devices of the character described which comprises winding spinable fibers on a frame, inserting the material so wound in a shell and then reducing the cross-sectional area of the shell until said fibers are highly compressed.

16. The method of making devices of the character described which comprises winding spinable fibers on a frame, twisting the frames relatively to each other to partially compress the fibers, inserting the material so compressed in a tube, and then reducing the size of the tube by swaging.

17 The method of making devices of the character described whichcomprises winding spinable fibers on a frame, said fibers extending lengthwise, partially compressing the fibers, inserting the body thus formed eeeeme lengthwise in e tube, subjecting the fibers to pression, inserting the body thus formed in 715% heavy sidewise pressure by reducing the an open-ended seamless tube, subjecting the size of the tube, and dressin 0% the ends of outside of the tube to trensverse pressure the tube and the body of fiber, leaving the to reduce its diameter, increase the thickness 5 fibers at one end projecting slightly beyond of its well and highly compress seid by. the tube. in witness whereof, I have hereunto set 18. The method of making devices of the my hand this thirty-first day of Uetober;

eherecter described which comprises form- 1919; v I ing e body of textile fibers, seid fibers being 7 arranged lengthwise and under some eom- J. GUAY.

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