US1393668A - Automatic rough-grinding mechanism for piston-rings - Google Patents

Description

J. .H. CUMMINGS. AUTOMATIC ROUGH GRINDING MECHANISM FOR PISTON RINGS.

APPLICATION FILED DEC. I6. I920.

Patented Oct 11, 1921.

2 $I'IEETSSHEET 2- HIIIIII M' NIII I. H. CUMMINGS. AUTOMATIC ROUGH GRINDING MECHANISM FOR PISTON BIN-GS.

APPLICATION FILED DEC, I61 I920.

PATENT OFFICE.

JAY HIRAM GUMMIN GS, OF ELMIRA, NEW YORK.

AUTOMATIC ROUGH-GRINDIN G MECHANISM FOR PISTON-RINGS Specification of Letters Patent.

Patented Oct. 11, 1921.

Application filed December 16, 1920. Serial No. 431,215.

To all whom it may concern:

Be it known that I, JAY HIRAM CUM- MINGS, a citizen of the United States of America, residing at Elmira, in the county of Chemung and State of New York, have invented certain new and useful Improvements in Automatic Rough-Grinding Mechanism for Piston-Rings, of which the following is a specification.

The primary object of the invention is the provision of a compact and serviceable device for rough grinding piston rings and the like, automatic feeding and holding means being provided for the work during the grinding operation.

A further object of the invention is the provision of an automatic chuck and feed device for piston rings serviceable in connection with the rough grinding of rings, the device possessing great strength and dur ability.

A still further object of the invention is the provision of an automatic feed and chuck for piston rings whereby the rings are successively presented and held for grinding on the o posite faces thereof by means of a double disk grinder, the mechanism being simple in construction and economical in manufacture.

With these general objects in View, the invention consists of the novel form, combination and arrangement of parts hereinafter more fully described in connection with the accompanying drawings, and in which like reference characters indicate corresponding parts throughout the several views. y

Inthe drawings,

Figure 1 is a side elevational view of the automatic chuck and feed mechanism,

Fig. 2 is anend elevational view thereof showing the device in connection with a double disk grinder during the grinding operation,

Fi 3 is a top plan- View thereof including t e showing of the double disk grinder with the disk guide,

Fig. 4 is a vertical central sectional view through the clutch longitudinally of the machine,

Fig. 5 is an elevational view of aportion of the chuck showing a piston ring held in position by the adjustable jaw of the chuck,

Fig. 6 is a perspective view of the chuck plate detached,

Fig. 7 is a perspective view of one of the chuck jaws detached, and

Fig. 8 is a perspective view of one of the piston rings upon,which the machine is adapted to operate.

Referring more in detail to the drawings, my invention broadly consists of a magazine 10 for supplying rough piston rings such as 11 to the holding mechanism of a clutch plate 12 for the purpose of grinding the opposite faces or sides of the ring 11 by means of a double disk rinder 13. The grinder 13 consists of paraillel emery wheels mounted upon an operating shaft 14 with a guiding disk 15 for the chuck plate 12 positioned between the separated emery wheels designated 13.

The feed magazine 10 is of tubular forma tion, comprising sections 16 and 17 semi-circular in cross section and connected together by hinges 18 at one side of the magazine and normally maintained closed by a suitable latch 19 at the op osite side of the magazine. A piston or flange 20 is mounted for movement within the bore of the magazine 10 for feeding the piston rings contained therein toward the opposite or dis charge end thereof. Any suitable means for movin the piston 20 toward the discharge end 0 the magazine 10 may be employed, and it is deemed unnecessary to illustrate the same herein.

A stationary bracket 21 mounted upon a fixed horizontal shaft 22 has a head or stop 23 at its free end positioned opposite the discharge end 24 of the magazine 10 for abutting engagement by a ring when ejected from the magazine 10 by the piston 20. The chuck late 12 is journ'aled for rotation upon the s aft 22 by a hub consisting of opposite sections 25 and 26 secured together by screws 27. and having acentral chamber 28 within the hub. Opposite extensions 25' and 26 of the hub sections 25 and 26 respec- .tively are journaled upon the shaft 22 for convenience in rotating the'chuck upon the said shaft during the operation of the device.

A plurality of ring receiving openings 29 are provided in the plate.12, each of said openin s having a chuck jaw 30 slidable in i .a radia extension 31- of the opening whereby a piston ring 11 is clutched in the opening 29 by means of the .jaw 30 when the jaw is released in the manner hereinafter described. Each jaw 30 has an inwardly extending rod 32 passing through a rectangular opening 33 in the late 12 with antifriction rollers 34 upon t e inner free end of the rod 32 within the chamber 28 inwardlX of the inner edge 35 of the plate 12. spring 36 surrounds the rod 32 within the opening 33 and bears upon the inner side of the opening 33 and against a shoulder 37 carried by the rod 32 and whereby the clutch jaw 30 is normally positioned outwardly for holding the piston ring as best illustrated in Fi 5 of the drawings.

double cam 38 secured upon the shaft 22 has a groove 39 in the innerface of each portion of the cam adapted for the reception of the wheels 34 with the'rod 32 in the space 40 between the sides of the cam 38 when the chuck is revolved upon the shaft 22 around the cam. The operation of the invention will be apparent from this detail description thereof, the ring 11 ejected from the end24 of the magazine 10 passing into and pro jecting through one of the openings 29 of the plate 12 when such opening comes in alinement with the bore of the magazine 19 during the revolution of the chuck.

At such times, the head 23 acts as a stop for the ring and a further rotation of the chuckplate 12 substantially .5 brings the rollers 34 of the chuck jaw 30'outwardly of the exit 41 of the cam 38 permitting the spring 36 to cause the jaw 30 to snap closed upon the ring 11 whereby the ring is held in the opening 29 during the travel of the plate 12 in the direction indicated by the arrow in Fig. 2. of the drawings. The turning of the hbad 26 is preferably timed for stopping the plate 12 when the openings 29 pass each quarter positioned so that each opening 29 will be positioned for an instant successively in alinement with the bore of the magazine 10 and between the sides 13 of the double disk grinder 13. The grinder operates. in this manner upon the sides of the ring lland the continued turning of the chuck plate 12 substantially 45 from the point of grinding, brings the rollers 34 of the'chuck jaw within the entrance end 42 of the cam 38 so that the cam grooves 39 cause the spring 36 to be compressed and the jaw '30 released from the ring 11 when the opening 29 is at substantially the bottom of the plate 12. The ring 11 upon'beingreleased in this manner is readily removed from the chuck. The stopping of the chuck; at every 90 allows time for a. new ring to feed-into the plate opening 29 adj accnt' the to offthechuck and for the ring that is he d by .the. chuck to be ground by the grinder 13 as well as to permit the ring at the bottom of the chuck to drop out of its opening 29 upon automatic release by the chuck jaw 30.

While the form of the invention herein set forth and described is believed to be the preferred embodiment of the invention, it is nevertheless to be understood that minor incense ,matic 'jaws carried by the plate adjacent the openings.

2. A device of the class described comprising a fixed shaft, a hub journaled thereon, a bracket fixed to the shaft having a head at its free end spaced from the periphery of the hub, an outwardly projecting plate carried by the hub having openings adapted for positioning adjacent said head during the rotation of the hub, a radially movable jaw carried by the plate adjacent each of said openings, automatic closing means for the jaws, and means adapted to automatically retract the jaws to open position during the rotation of the hub.

3. A device of the class described comprising a fixed shaft, a hub journaled thereon, a bracket fixed to the shaft having a head at its free end spaced from the periphery of the hub, an outwardly projecting plate carried by the hub having openings adapted for positioning adjacent said head during the rotation of the hub, a radially movable jawcarried by the plate adjacent each of said openings, automatic closing means for the jaws, means adaptedto automatically retract the jaws to open position during the rotation of the hub, a magazine positioned adjacent said .head at the opposite side of the plate, and operable means within the magazine adapted for the successive discharge of piston rings from the magazine into the openings of the plate and in contact with said head during the operation of the device. I 4. An automatic chuck and feed for piston rings comprising in combination with a double disk grinder, an annular late havmg ring receiving openings an 'mounted for turning with said openings between the sides of the grinder, a normally closed clutch jaw' for each of said openings, a guide disk for the plate between the sides of thegrinder, and automatic retracting means for said jaws adapted for operation subsequently to the grinding o eration.

5. An automatic chuck an feed for piston rings comprisin in combination with a double disk grin er, an annular plate havmg rin receiving openin and'mounted for turning with said opemn s between the sides of the grinder, a normal y closed clutch plate j ournaled upon the shaft with a central chamber within which the cam is positioned,

and operative connecting means between said jaws and cam whereby the jaws are adapted for retraction subsequent to each grinding operation and are released for automatic closing at a predetermined point in the rotation of the plate.

6. An automatic chuck and feed for piston rings comprisin in combination with a double disk grinc er, an annular plate having ring receiving openings and mounted for turning with said openings between the sides of the grinder, a normally closed, clutch jaw for each of said openings, a guide disk for the plate between the sides of the grinder, a stationary shaft, a cam fixed upon said shaft, hub members secured to said plate journaled upon the shaft with 'a central chamber within which the cam is positioned, operative connecting means between said jaWs and cam whereby the jaws are adapted for retraction subsequent to each grinding operation and are released for automatic closing at a predetermined point in the rotation of the plate,'and a magazine adjacent the plate adapted for feeding piston rings successively into said openings prior to the closing of said jaws.

In testimon whereof I affix m signature.

AY HIRAM CU MINGS.

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