US 1837724 A
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Description (OCR text may contain errors)
Dec. 22, 1931, A G M Mic-HELL 1,837,724
CRANKLESS MECHANISM AND METHOD OF MAKING CRANKLESS MECHANISMS Filed Dec. 20, 1929 7 a; ff 6 l L2- ZZ Figi F2925 F g 'Il 'Il'.
INVENTOR W W Ala/w. /wf/M/ MN5/Law! ATTORNEY Patented Dec. 22, 1931 UNITED STATES PATENT OFFICE ANTHONY G. M. MICHELL, OF MELBOURNE, VICTORIA, AUSTRALIA, ASSIGNOR TO MICHELL-CRANKLESS ENGINES CORPORATION, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK CBANKLESS MEOHANISM AND METHOD OF MAKING CRANKLESS MCHANISMS Application'led December 20, 1929. Serial No. 415,386.
This invention relates to crankless mechanisms and particularly to reciprocating units therefor and to a method of making such units. v
An example of a crankless mechanism to which the present invention relates is illustrated in applicants Reissue Patent No. 15,756 granted February 5, 1924.
The reciprocating units of crankless mechanism constructed according to the patent above mentioned comprise either one or two pistons, together with two slipper elements making working engagement between the piston or pistons and a rotating slant or swash plate, and a yoke or bridge member which connects the piston or pistons with the supporting means of the slipper elements. The present invention relates to the piston structure, the yoke or bridge member and to the supporting means of the slipper elements.
The invention has for its salient object to l provide a reciprocating unit for mechanism of the character specified so constructed that the unit will be light in weight but will be strong and rigid in construction.
Another object of the invention is to provide a reciprocating unit so constructed that it can be economically manufactured.
Further objects of the invention will appear from the following specification taken in 'connection with the drawings which form a lart of this application. and in which ig. 1 is a longitudinal'view partly in section and partly in elevation of a reciprocating unit constructed in accordance'with the invention;
Fig. 2 is a transverse sectional elevation taken substantially on line2-2 of Fig. 1;
Fig. 3 is a plan View of one of the disks on which the slipper pad is mounted;
Fig. 4 is an elevational view illustrating Vthe method of making the unit;
Fig. 5 is alongitudinal sectional elevation similar to Fig. 1 but showing a slightlyl modified form of construction; and
Fig. 6 is a transverse sectional elevation taken substantially on line 6 6 of Fig. 5. The invention briefly described consists of a reciprocating unit for crankless mechanism comprising and formed from a tubular member and of a method of making a` reciprocating unit from tubular stock. Disks or heads are secured to the ends of the tubular member and with the end portions of the member form pistons. The intermediate portion of the tubular member is recessed or c-ut away and provided with a longitudinal slot `formed by oppositely eX- tending walls for receiving studs or tails carried by the slipper pads.
Further details of the invention will appear from the following description.
The reciprocating unit is formed from an elongated member l0 of tubulir stock preferably of steel. The ends of the tubular member 1Q have secured thereto in any suitable manner as by screwing or welding heads 11 which form with the end portions of the tubular member pistons.
, The central portion of the tubular member is recessed or cut away to receive the peripheral portion of the swash plate. This may be done by. cutting transverse notches 12, 12. A longitudinal cut is then made approximately on the line indicated as X in F ig. 4' thus removing the portion of the tubular member between. the notches and below the line X. The remaining portions of the walls of the tubular member disposed between the notches 12, 12 are then bent inwardly as shown inFig. 2, the inner edges 13, 13 of the walls or flanges 14 being spaced apart to form a longitudinal slot, the purpose of which will behereinafter described. The end portions of the tubular member Vforming the pistons and disposed outwardly from the notches 12, 12 are closed by disks 15, 15 which may be secured in any suitable manner as by welding, the welded joints being shown at W. The disks are preferably provided with centrally disposed openings 16 within which are secured bosses 17 having spherical seats or sockets 18 which receive the ends 13 of the bent in portions or flanges each other for aA portion of their length a sufficient distance to meet, the meeting parts being welded to increase the strength and rigidity of the yoke. p
In the modified form of construction illustrated in'Figs' 'and 6 the ends of the tubular member 30 are screw threaded to receive the piston heads. The member is notched and cut away in the manner shown in Figs. 1 and 4 but'the walls of the tubular member between the notches instead of being bent 32 1n the manner shown in Fig. 2. Thev inwardly as shown vin Fig. 2 are bent outwardly as shown in Fig. 6 to form flanges 31.
An insert preferably formed of forged steel is secured within the recessed or cut away portion of the tubular member and comprises end walls or plates 32, 32 and a longltudinally extending curved connectlng wall 33. The wall 33 extends laterally from the tubular member and is secured at its outer edges to the flanges 31 as shown in Fig. 6. The insert is preferably secured in place by Welding as shown at W.
The slipper bearings and sockets for the slippers are secured to the walls or plates 32,
' flanges 31, 31 may be machined to form bearings for guide slippers 35 which are pivoted.
or otherwise cammed4 by the frame of the machine and act to prevent rotation of the reciprocating member about its llongitudinal axls.
From the foregoing description it will be evident that a simple, practical and relative light reciprocating unit has been designed and furthermore, that the structure will be stiff and rugged. Also, it will be noted that a simple, practical and inexpensive method of making reciprocating units from tubular stock has been worked out.
Although certain specic embodiments of the invention'have been particularly shown and described, it will be understood that the invention is capable of modification and that changesin the construction and in the arrangement of the various cooperating parts may be made without departing from the unit for crankless mechanisms which consists of utilizing a piece of tubular stock, securing heads to the ends thereof to form pistons, slotting the piece-in spaced planes intermediate the ends of the piece, and bending the walls to form slipper guiding means.
3. A method of making a reciprocating unit for crankless mechanisms which consists of utilizing a piece of tubular stock, securing heads to the ends thereof to form pistons, slotting the piece in spaced planes intermediate the ends of the piece, and bend- 4 mechanisms comprising a piece of tubular stock having heads secured to the ends thereof and having its central portion slotted and bent to form a hollow yoke connecting the ends` and to form slipper guiding means, and plates secured in the centraly slotted portion having slipper bearings thereon. ANTHONY G. M. MICHELL.
spirit or scope of the invention, as expressed l in the following claims.
What I claim is: j
l. A method of 'making a reciprocating unit for crankless lmechanisms which consists of utilizing a piece of tubular stock, securing heads to the ends thereof to form pistons, slotting the piece in spaced planes intermediate the endsof the piece, and bending the walls to form a yoke connecting the ends of the piece.
2. A method of making a reciprocating