US1703815A - Electric polishing machine - Google Patents

Description

L. CRANE ELECTRIC POLISHING MACHINE Feb, 26, 1929 1,703,815

Origxi-nal Filed June 16, 1923 J] 0? jg .1 J

I .24 Q I N t 2 1% EE- L avwesdoz 3% V TZ Patented Feb. 26,1929.

*U ST PATENT OFFICE. 1*

LESLIE CRANE, or RUTLAND, VERMONT, .essro'non or ONE-HALF To run. 'rn'ren MAN FACTURING COMPANY, or VERMONT.

ltUTLA ND," VERMONT, A CORPOBATIQH Oil ELECTRIC rousnine mcnmn Original application filed June 16, 1923, Serial No. 645,828. Divided and an! application. nee June a,

. r v 1924. Serial Io. 717,490., e

This invention relates. to certain new and useful improvements in electric polishing machines and more particularly to that type of machine in which a swinging arm. is

mounted on a vertical standard carrying a polishing disc, and is a division of my application Serial Number 645,828, filed JunelG, 1923, the object being to provide means for mounting the head.

A further object of the invention is to provide a polishing machine in which a central standard is mounted rigidly within .abase and hasmounted thereon a head carrying an electric motor.

A still further object of the invention is to provide a construction of polishing machine in which the working parts are enhoused so as to protect the same from grit and dust, thereby increasing the life of the machine. e I

In the drawing Ihave shown a vertical section of my improved construction of standard for a polishing machine comprising a base (not shown) having an upwardly'extending reinforced portion2 having a tubu-' lar bore 3 into which is driven a tubular standard 4 and secured by pins 5' as clearly 7 shown in the drawing. Driven into the top of the standard 4 isa socket 6'provided with a shoulder 7 bearing on the upper end of the standard4 as clearly shown. The socket 6 is annularly reduced as shown at 8 into which is secured a sleeve 9 forming with the socket 6 an annular chamber 10 into which is adapted to extend a'tubular portion 11 of a head 12, said tubular portion being provided with openings 13. The lower end of the tubular portion is mounted on ball bearings 14 within the bottom of the chamber 10 which is adapted to receive a lubricant forikeeping the bearings lubricated at all times.

Bolted to the-head 12 is a collar 15 provided with an arm 16 adapted to support an electric motor. A collar 15 carries an arm 22 provided with a bearing 21 and a sleeve 23,

which has its lower end arranged within a collar 24 having an annular extension 25 which extends into a' cup 26 formed on the upper end of the extension of the base and in which are arranged roller bearings 27 ,saidcollar having a hood 28 extending down over the cup portion for protecting the same. The collar 24 is provided with an arm 29 having a socket 3O atits outer end.

parts, the, machine isbalanced.

The construction thus far described forms the main standard on which thehead is revolubly mounted carrying the motor and drip ing shaft so that the swinging. sectional arm of machines of thi's'kind will swing as the weight is "not equally distributed in- View of the length. of the sectional arm, it is desirable to provide means for taking care of the side thrust, which I have accom lished and by the particular manner of mounting the The head 12,'c'oll ar 15, sleeve 23 andcollar 24 constitute what I have termed a body,

which is rovolubly mounted on the standard on ball bearings so that the same. can swing around the standard. freely, the sleeve 23 constituting a guide on which the tubular portion of the working arm is slidably mounted.

What I claim is z 1. In a polishing machine, the combination with a base having a vertical tubular standard fixed therein, of a socket arranged in the upper end of said standard having an annular shoulder'resting on the upper edge of said standard, a sleeve fixed in said socket forming an annular chamber, a head having an apertured tubular portion extending into said chamber with its outer wall in contact with the outer wall of saidchamber and ball bearings disposed in thebottom of said chamber upon which the' lower end of'said tubular portion of said head is mounted and a sleeve carried by saidhead extending downwardly around said standard.

2. In a polishing machine, thecombination with a fixed vertical tubular standard, of a socket'having an annular reduced portion secured in the upper end of said standard, a sleeve secured in the reduced portion of said socketjforming an annular oil chamber, ball bearin s disposed in the bottom of said chambet, a ody surrounding said standard provided with a head having a dependin tubular portion extending to said cham er and mounted upon said bearings and a bearing carried by the standard for the lower end of said body. 2 r

posediinthe bottom of said chamber, a body provided with a head having a depending apertured tubular portion extending into said chamber and fitting the outer Wall snugly the'reof, the lower end of said tubular portion being mounted on the bearings Within said chamber said body belng provided wlth a tubularportion surroundmg said standard and a bearing carried by the standard for the lower end of the tubular portion of said body. 4. In a polishing machine, the combination with a' 'fixed vertical standard having an annular oil-chamber at its upper end,a bearingarranged in the bottom of said chamber of abody surroundingsaid standard having a head mounted on said standard anda downwardly extending apertured tubular portion carried by said head extending into said chamber having its lower end mounted on the bearings therein'and having its outer Wall in "contact with the outer Wall of said chamber andabearing carried by the standard for the lower end of said body.

In testimony whereof I hereunto aiii my signature.

LESLIE RANE.

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