US1411923A - Polishing machine - Google Patents

Description

D. I?.y McGOVERN. 'POLISHING MACHINE. APPLICATION FILED APR.10, 1920.

Patented Apr. 4, 1922.

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n APPLICATION FILED APR. Io, I9 2o. 1,411,923.

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n. F. MC'GOVERN.

POLISHING MACHINE.

APPLICATION FILED APR, 10, i920.

3 SHEETS-SHEET 3- PIGIV liz/1612201* Patented Apr. 4, 1922.

UNITED STATES PATENT OFFRC.

DANIEL FREDERICK MGGOVERN, OF MONTPELIER, VERMONT.

POLISHING- MACHINE.

Application filed April 10,

To all whomy t may concern.'

Be it known that 1, DANIEL F. MoGovnnN, a citizen of the United Sta-tes, residing at Montpelier, county of Washington, State of Vermont, have invented certain new and useful Improvements in Polishing Machines, of which the following is a speciication.

This invention relates to polishing machines and particularly to machine of the swinging arm type. ln machines of Athis sort it is of great practical advantage to have the arm capable of a complete swing about its support. A capacity for such movement greatly enlarges the output of the machine as it is available for work on all sides of its mounting. 1n heavier machines it is important that the mounting be fixed and of a permanent nature, and work for a machine so installed must therefore be presented to the machine or within its working range.

ln my present invention l have provided a machine of great stability and endurance and one having a wide working area as well as an easy operation and adjustment through that area. The form of my machine herein shown is a practical embodiment found en tirely satisfactory in yard or shed. Throughout the specification and the drawings showing this illustrative embodiment like reference characters are employed to indicate corresponding parts, and in the drawings:

Fig. 1 is a side elevation of the machine.

Fig. 11 a detail of the head.

Fig. 111 a sectionthrough they center arm shaft.

Fig. 1V a detail of the arm bearing on the column, and

Fig. V a vertical sectional view through the spindle. A

My machine comprises a base .1. bearing a vertical column 2 havinga head 3 rotatably mounted on the top of the column. The arm comprises a cylindrical bearing fl which surrounds the column 2 from which is eX- tendeda pair of frame or ladder arms 5--5 braced by a web 51. The ends of the arms 5-5 have bearings. 6 in which swing the bearing ends of an arm extension 7. At the other end of the arm extension 7 are bearings 8 in which is the vertical work spindle 9.

Within the vertical column 2 which is fixedA on the base 1 is a shaft '10 driven by suitable Specification of Letters Patent.

Patented Apr. 4, 1922.

1920. Serial N0. 372,896.

gearing from a power shaft 1l. On the upper end of the shaft 1() is a pinion 12 which through an idler 13 and a meshing pinion 1d drives Vthc shaft 15. The shaft .15 has abearing 16 in the head 2l and also has bearings at 1T and 1S in the column bearing el. Between the l'iearings 17 and 18 1s mounted a pulley 1S) splinedvto the shaft 15 so that the arm 5 together with the pulley may be vertically raised and lowered on thecolumn 2. The shaft 15 of the pulley 19- is disposed opposite to the arm 5 and extension 7. .On the oppositek side of the Shaft 15 is a fixed guide rod- 20 carried by the head 3 and extending down through the arms 5 so as to balance, guide and steady the arm and head 3 in all positions of ver-` tical adjustment and swing.

1t is vto be noted that the interposition of the idler 13 has the eii'ect of offsetting any creeping tendency of the arms 5 about the column 2. lVhile the location of the pulley on the opposite side of the column 2 from the arm might be shifted to the other side, it is advantageous in the balance of the machine. The idler however balances any creeping' tendency and leaves the arm uninluenced by planetary[movement which otherwise would. be present.

On the same side of the bearing l is a multiple pulley 21 and on the head- 3 directly above it is a corresponding pulley 22. The chain or cable indicated Yat 23 is passed about 1these pulleys and preferably made fast at one end tothe head The other end is brought around a pulley 24e and carried to a drum 25 mounted on the arm 5. The shaft 251 is suitably connected to a shaft 26 iitted with a hand wheel 261 and having at its other end a bevel friction wheel 262 which may be brought in Contact with either the friction wheel 27 or 28 of the shaft 30. These friction wheels are shiftable by a bell crank 31 connected by link 32 with a bent lever The end of the lever 331 is brought down to a convenient )osition in relation. to certain other levers ereinafter to be described so as to make the control of the machine within the immediate hand grasp of the operator.

The shaft 30 as more clearly appears in Fig. 111 is suitably bushed and journaled within the sleeves 301 within the bearings 6 of the arms 5. The arms 7 have bearings 71 throu h which the sleeves 61 are passed and fixecgl by suitable set screws. Between the arms 7 are a pair of pulleys 34 and 35. The pulley 34 is belted to the pulley 19, the pulleys being of such diameter that the belt passes freely around the web 51 and the column 2. The pulley 35 is connected by a second belt to the pulley 36 on the work spindle 9. The pulley 36 is loose on the spindle 9 but carries a clutch 37 adapted to be engaged by a corresponding clutch member 38 splined indirectly to the spindle 9. The clutch member 38 is keyed on a hollow sleeve 60 held between the main bearings 61 of the shaft 9. Through this sleeve 60 the spindle 9 passes, and to it the spindle 9 is keyed. This splining to the spindle 9 permits the vertical movement ofthe spindle as far as the limiting stops 39 permit. The movement of bringing the tool carried by the work spindle into engagement with the work is effected by a hand lever 40 having a hand grasp 401 and pivoted at its opposite end 402 to a bracket 41 on the lower' side 'of the arm. The clutch member-'38 is moved by a lever 42 pivoted at 43 in a bracket 44 and connected by a link indicated in dotted lines at 45 to the inner end of a lever 46 pivoted as indicated in broken lines at 47. lhe inner end of'this lever 46 indicated at 461 lies just above the hand grasp 401 of the spindle lever 40.

` The pivoting of the arms, the disposition of the pulleys and the beltingV permits the work spindle tok be carriedaround through a com lete circle or surroundin zone lying entire y about the column 2. 1e head 3 is lso balanced and mounted on the column 2 that the arm 5, 7 is moved with very little effort. The head 3 runs on ball bearings 31 interposed between its lower face and an annular bracket 21 carried on the column 2. The head 3 has the bearing 101 ofthe shaft 10 disposed centrally of itand the bearing 16 of the shaft 15 and the rod 20 are symmetrically disposed on opposite sidesso {lhal they also balance, guide vand steady the The bearings 4 of the arms 5 enclosing the column 2 are provided withl an annular pocket or recess as at 50 and in this annular pocket are located an annular antifriction set. This set consists of a hardened sleeve 51 enclosing the column 2 and a corresponding larger annular sleeveV 52 set against the back Wall of the pocket 50. Be tweenthese sleeves 51 and 52 is a roller bearing consisting of a plurality of rollers 53 carried in a suitable cage 54. The arm 5 has therefore a great freedom and ease of rotation about the column 2. Furthermore on account of the position of the pulley 19 the driving strain is very evenly balanced and taken up against the column 2 which lies between it and its driven pulley 34.

The roller bearing in the pocket 52 is closed by a cap 55 and scaled by a packing 56 which prevent-s the entry of anv dust or grit within this bearing as the arm is vertically adjusted. Although the arms 5, 7 may be raised by the hand wheel 26, vertical adjustment of the arm as well as its control, otherwise 1s effected through the lever group 33, 46 and 40. As will be seen in F ig. I, the ends of these levers 331, 461 and 401 are disposed in a convenient juxtaposition so as to be within the immediate grasp and control ofthe operator at the work spindle end of the arm. This permits a positive and immediate control of the arm in anyposition of the arm through the entire 360O of swing and in any radial position in thezone about the column 2.

' Various modifications in the construction and operation of my device may obviously be resorted to if Within the limits of the appended claims.

What I therefore claim and desire to secure by Letters Patent is:

j 1. In a polishing machine, a fixed hollow column, a revoluble head thereon, a central vertical drive shaft therein and eX- tending through said head, an 'arm having a bearing embracing said column, a pulley on said bearing on the opposite side of said arm,"a shaft for said pulley and splined thereto, said shaft being journalled in said head and geared to'said drive shaft. 2. In a polishing machine, a fixed hollow column. a revoluble head thereon, a cen tral vertical drive shaft therein and extendingV through `said head,an arm having a bearing embracing said column, a pulley on said bearing on the opposite sidc of said arm, a shaft for Said pulley and splined thereto, said shaft being journalledin said head and geared to said drive shaft, an eX- tension arm pivoted tothe end of said first-` named arm, a shaft in the axis of said arm pivot, a pair of pulleys on said shaft, a work shaft at the end of the extension'arm, and a drive for said work shaft. i

3. In a polishing machine, a fixed hollow column, a revoluble head thereon, a central vertical drive shaft therein and extending through said head, an arm having a bearing embracing said column, a pulley on said bearing on the opposite side of saidarm. a shaft for said pulley and splined thereto, said shaft being journalled in said head and geared to said drive shaft, an extension arm pivoted to the end of said first named arm, a work shaft at the end of the extension arm, and a drive pulley for said work shaft.

4. In a polishing machine, a fixed hollow column.a revoluble head thereon, a central vertical drive shaft 'therein and extending through said column and head, an arm having a bearing embracing said column, a pulley arm, a shaft geared to said drive shaft and mounted on said head and passing through said arm, and a pulley on said bearing and splined thereto.

In a polishing machine, a fixed hollow column, a revoluble head thereon, a drive shatt extending through said column and head, an arm having a bearing embracing said column, a pulley on said arm, a shaft for said pulley and splined thereto, said shaft being journalled in said ihead and geared to said drive shaft, an extension arm pivoted to the end of said lirst named arm, a shaft in the axis oit' said arm pivot, and a pair of pulleys on said last named shaft.

o. In a polishing machine, a fixed hollow column, a revoluble head thereon, a drive shaft't extending through said column and head an arm having a bearing eniibracing said column, a pulley on said arm, a shaft Jfor said pulley and splined thereto, said shaft being journalled in said head and: geared to said drive sha-ft, an extension arm pivoted to the end oi said first named arm, a shaft in the axis of said arm pivot, a pair ot' pulleys on said shaft, a work shalt at the end ol' the extension arm and a drive pulley for said work sliatt.

7. In a polishing machine, a tixed column and a head rotatably mounted on t-he top thereof, an arm rotatably and slidably mounted on said column, and a pair ot shafts disposed one on each side oft' said head and slidably engaging said arm,

S. In a polishing machine, a ixed column,

and a head rotatably mounted on the top.

thereofA` an arm rotatably and slidably mounted on said column, and a pair oit shafts disposed one on each side oi said head and geared to earh other and slidahly engaging said arm. l

S). In a polishing machine, a lixed column, a revoluble head thereon, a central drive .shaft passingl through said head and haring a pinion thereon, a second vertical shaft carried by said head outside of said column,

and having a pinion at its upper end, and an intermediate pinion on said head and engaging said two tirst named pinions.

l0. In a polishing machine, a fixed hollow column. a revoluble head thereon, a central vertical drive shaft therein and extending through said column, an arm having a bearing embracing said column, a pulley on said arm, a shaft mounted on said head passing through said arm, a pulley on said bearing and splined thereto, a pinion on the ver` tical drive shaft, a pinion on said pulley shaft, and a pinion on said head intermediate oi said pinions.

ll. In a polishing machine, a fixed hollow coulmn, a revoluble head thereon, a central vertical drive shaft therein and extending through said column, an arm having a bearing emb acing said column, a pulley on said arm, a shaft mounted on said head passing through said arm, a pulley on raid bearing and splined' thereto, a pinion on the vertical drive shaft, a pinion on said pulley shaft, and a pinion on said head intermediate of said pinions, an extension arm pivoted at. the end of the tiret-named arm, a sha-tt in the axis of said arm pivot, a pair oli' pulleys on said sha-tt, a Work shaft at the end ol said extension arm, and a drive pulley on said'A shaft.

l2. In a polishing machine, a Vfixed column, a central vertical drive shaft thereinl and eX- tended through said column, an arm having a bearing embracing said column, a pulley on said. bearing, a shaft passing through said bearing, a pulleyY on said bearing and splined to said shaft, a. pinion on the vertical drive shatt, a pinion on said pulley shaft, and an idle pinion intermediate of said pinions.

In testimony whereof I affix my signature in presence or" two witnesses.

DANIEL FREDERICK McGOVERN.

.lVitnesses l). P. ldrriiN, R. B. PIERCE.

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