US1177126A - Engine. - Google Patents

Description

F. MILLER.

ENGINE.

APPL-lcATloN Flu-:n huma. |915.

l 9 l 'Y l Patented Mar. 28, 1916.

Y I To all whom t concern:

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\ arrienrnnnz MILLER., or Minen', ira-LY.

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Be it known that I, FRANZ MILLER, a sub- Y ject of the King of Italy, residing at Milan,

have invented certain new and useful Italy of which the 'fol- Imprvements in Engines,

-lowing is a specification.l

,This invention relates to engines in which the transmission of the reciprocation of pistons into rotary motion of the driving shaft is obtained by means of one or more undulated or cam guides or grooves on which the pistons act, and has for its object a type of engine comprising two or more independent pistons, which have differentl strokes so'that the expansion qfthe fluid may be fully, utilized in the casehihe engine isoperated byiuid under pressurem One constructiongjbf engine according to this invention is shown in the annexed drawing, said engine comprising one or more sets of coaxial and annular cylinders.

As shown in said drawing, the annular cylinders are formed-by an outer wall 1 and an inner'pipe 2 inwhich the driving shaft 3 is mounted. The wall 4 separates the chambers of cylinders 5 and 5' from each other, and said cylinders are further closed at their ends by the front walls 6, 6.` In said cylinders 5, 5', the independent pistons 7 and 7 are mounted, which are connected -by means of rods 8, 8 passing through walls 6 and 4, with rings 9, 9 each comprising a set of rollers 10, 10 respectively. Said rollers are engaged in undulated or cam grooves (one for each set of rollers) provided in the sleeve 11 solid with the driving shaft 3. e

'Ihe base of the engine is provided with on which bear rollers 13, 13', pivoted on the rings 9, 9', so that these rings may travel longitudinally but are prevented from rotating.

The pistons 7 and 7 being independent from each other may be caused to make strokes having different lengths by giving diderenty heights to the undulations of the cam grooves of sleeve 11 engaged by rollers 1G and 10. In this case the expansion of the driving duid may be fully utilized by directing said 'iuid in cylinder 5 after it has acted in cylinder 5 owing to the fact vthat the required ratio between the volumes of cylinders 5 and 5 may be obtained by giving a longer stroke to the piston 7 so that it is not required to increase exceedingly the diameter of the corresponding cylinder.

`regard to each lother or by an Specication of Letter-erstens. Patignd Mmm, '19th-wn.

Application filed` August 23, 1915. Seria1No.46,922.

other, it is also possible to eliminate the dead centers in the operation of the engine by angularly displacing the cam grooves'with gularly' displacing the line of thrust of rollers 10, 10.

engaging the same cam groove or diderent cam grooves having the same angular posit-ion. In this case, by way of example, when the high `pressure piston has reached the end of its stroke, the low pressure piston is still actuating the driving shaft, a further portion of stro e having to be made by" it.

In the case the strokes made by the pistons are different from each other, andthe'member providing the cam grooves or'guides for the rollers is in form of a cylindrical sleeve, it is advisable to provide the groove or 'de having the smaller wave height in the inner`- Wall of the sleeve while the groove or guide having the larger wave height is made in the outer surface, this latter being not confined by the spokes or disk connecting said sleeve. with the driving shaft. This is thel case shown in the drawing, the engine illuscylinders are symmetrical to that 5 and 5 and operate cam grooves eachjof which is symmetrical to the corresponding one.

By means of the described arrangement an engine is obtained in which the driving,

`lines angularly displaced with regard to each other in order'to eliminate the dead centers.

v What I claim as my invention and desire to secure by U. S. Letters Patent is 1. In an engine having two or more coaxial cylinders and in which the transmission of reciprocation of the pistons into rotary motion of the shaft is edected by means of undulated members, an independent piston in each cylinder, a member solid with the driving shaft provided with independent undulated members having dierent wave heights and means for transmitting the thrust of each piston to one of said undulated members.

2. In an engine having two or more coaxial cylinders and in which the transmission of reciprocation of the pistons into r0- trated being further balanced owing to the fact that the pistons reciprocating in thev ton in each cylinder, a sleeve solid with thel driving shaft provided with undulated membershaving a given wave height on its outer surface and a different height on the inner surface, and means for transmitting the thrust of each piston to one of said undulated members.

3. In an engine having two or more coaxial cylinders and in which the transmission of reciprocation of the pistons into rotary motion of the driving shaft is effected by means of undulated members, an independent piston in each cylinder, a sleeve solid with` the driving shaft, undulated grooves having a given wave height-in the outer surface of said sleeve, undulated grooves having different wave height in the inner surface of said sleeve, sets of rollers the rollers of each set being engaged in one of said grooves and pivoted on a ring, means for guiding the travel ofsaid rings, and means for connecting each ring to the corresponding piston. f

4. In an engine having two or more coaxial cylinders and in which the transformation of reciprocation of pistons into rotary motion of the shaft is effected by means of' undulated members, an independent piston in each cylinder, a part solid with the driving shaft, undulated members having different wave height and angularly displaced with regard to each other in said part, and means for transmitting to each of said undulated members the thrust of each piston. 4 i.

5. In an engine having two or more coaxial cylinders and in which the transformation of reciprocation of pistons into rotary motion of the driving shaft is effected by means of undulated members, an independent piston in each cylinder, a sleeve solid with the driving shaft, undulated grooves in the outer surface of the'sleeve,

undulatedgrooves in the inner surface of said sleeve having dierent undulation and angularly displaced with regard to the outer ones, sets of rollers the rollers of each set being engaged in one of said grooves and pivoted on a ring, means for guiding the travel of said rings, and means for connecting each ring to the corresponding piston.

6. In an engine having one `or more pairs of coaxial cylinders and in which the transformation of reciprocation of pistons into rotary motion of the driving shaft is effect- -ed by means of undulated members, independent pistons each arranged opposite to another one, a part solid with the driving shaft, independent undulated members in said part, each symmetrical to another one, undulated members in said part each symmetrical to another one having different undulations and angularly displaced with regard to the rst named undulated members and means for transmitting to each pair of symmetrical undulated members the thrust of two opposite pistons. v

In testimony whereof I afiix my signature in presence of two witnesses.

FRANZ MILLER. Witnesses JOHN MARGH, FRANCISCO MARGH.

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