US1343751A - Adjustable v-block and the like for magnetic chucks - Google Patents

Description

F. L. SHVMUNS.

ADJUSTABLE V-BLOCK AND THE LiKE FOR MAGNETIC CHUCKS.

APPucATloN HLED MAR.19, 1919.

1,343,751. f I vmama June 15, 1920.

2 SHEETS-SHEET l.

. F. L. SIMMONS.

ADJUSTABLE v-BLocK AND THE LIKE EOE MAGNETIC cHucKs.

APPLICATION FILED MAR. I9, 1919. I

Patented June 15, 1920.

y l ttc/1MM,

ljuNlrlazD STATES,

lPATENT OFFICE.

FRANK. D. sIMMoNs, or wooNsocKE'nmIbE IsLANDfAssIeNQE 'ro 'rnE TAET- PEIRCE MANUFACTURING COMPANY, OF

coEroEA'rIoN or nHoDE ISLAND. AD .IUS'IAI.I:.Ev-IsLc'I: AND

To all/whom 'it may concern.' i

Be viiknown that I, FRANK L.v SIMMONS, a citiz of the United States, residingwat Woonsocket, in thewcounty of Providence, State of Rhode Island, have invented certain new and useful Improvements in Adjustable V-Blocks and the like for Magnetic Chucks, of which the following is a speciiication.`

. This invention relates broadly to magnetic chucks and more specifically to an attachjustable member'.

- ment comprising arradj ustable member adapted vto be operative-with a suitable magnetic chuck to adjustably. hold work above the face of the chuck. The principal bject'of the `'present invention isto provide anattachment for'magnetic chucks and the like comprising abase composed of a pluralityof magnetizable members.

separated by. non-magnetic material and .each 'being adapted towbe energized'by a suitable magnetic chuck yandfto carry an adjustable member comprisedof laminations of magnetizableand nn-.inagnetizable ma,-y

terial whereby the lines -of l force'sirom the base are carried inte and through the; ad-

A` further and more specific objectfof 'the present invention is to provide an attachment of the character specifiedy wherein the laminations [of magnetizable'mat'erial in the basev member are arranged such manner that each laminationis adapted to 'energiJzefd" by definite magnetic vpolesina suita 4le magnetic chuclgand lwith 4sustaining yposts provided for carrying the magnetism lnto the said laminations.,

Another and more specific' object of the *presentl invention is to provide an attachmentl of the characteifjspecified comprisingv a base "portion havinggjlamiations extending lengthwise thereQ -and havin a concavity alsofektending lengthwise `an .comprising a portion of a cylinder, a work-supporting non-magnetiz'able of the ma etizable material inthea'djuswe oNsocxET, MODE ISLAND, 'Al f' specioationof Letters Patent. Patented Juli-815,192@ Appunti@ mea "/Mareh 19,l 1919. serial No; 283,578.v i

ber whereby the magnetizable laminations A in the base member cannot be short-circuited by rotating the adjustable ,member Anothe object ofI the present invention is' lA still more specific object of the present invention is to provide an attachment for magnetic chucks vcomprising a base mem-l ber made up of sheets of soft steel and brass or the like brazed or Secured together-to .comprise a unitary member with projections `extending from the alternate sheets of'stee'l and arran ed in yauch manner that when the I base mem er. is in position vonvthe face of a suitable chuck the'alternate-.stri s ofsteel /are energizedl byalternate po es lin the chuck and with an adjustabley member also comprismg longitudinal strips" of alternate Steel and ,brass 'or the like brazed into a unita mass, and with the steel sheets in the" a justable member adapted to be enerlgizedv through the steel sheets. in the'base member. I

Another object of thepresent invention is to provide .an lattachment for magnetic` chucks and the like comprising a plurality .of individualizedv magnetizable strips, with each lstr-ip being provided with projections tocoperate with 'a delinite'pole piece .1n a

.suitable magnetic chuck whereby each sheet is energize Other and further objects of the present invention will in part-be obvious and will' inpartbe pointed out hereinafter in the specification] following wherein I have illustrated one form of my invention .and which illustrations 7and descriptions Il desire shall,

be considered as merely illustrative and not "in a limiting sense, dbecause -m construction .fisl'capab-le of, being embodie .in construcmovable member-being. adapted}jto, it sai f; tions other' than' thosefspecically shown and 4conc'a'vity and comprising-longitudinally 'enr-Fv`v tending laminati'ons foffmagnetizabl'e and" man@ -with the width:

described."

Showingthe end scale position. A i

Fig. 3 is a detail of a portion of the side of the device illustrated in Figs. l and 2.

Fig. 4 illustrates the manner in which the device is adapted tocoperate with a suitable magnetic chuck.

Fig. 5 is a perspective View more clearly illustrating the projections through which the magnetizable laminations or sheets of the base are adapted to be energized.

Magnetic chucks are usually made with flat work faces. Such a surface is the most 'commonly used supporting surface for work adapted to be held by magnetic chucks. Frequently, however, it is desirable to have magnetic chucks with inclined or adjustable faces. To this end adjustable auxili ary devices have been designed which are intended to carry the magnetic forces, by induced magnetism, through to asuitable adjustable work surface. Such devices have beenl heretofore constructed by making up a series of segments arranged transversely of the length of the device and with'the segments of alternate magnetizable and non-magnetizable material. Such devices are adapted to be placed on the face of a magnetic chuck and are intended to carry magnetic forces to 'the desired work surface. Where transverse segments or laminations are used, a considerable amount of the magnetic force is lost because the transverse sections, being less than the width of the poles, are adapted to be energized in such manner that a plurality of adjacent sections or laminations are of the same magnetic polarity, which means that between adjacent sections there is very little or substantially no holding force.

The present invention overcomes the difficulties of the known art b providing a base member and an ad'ustable work support made up of longitu inally extending strips of magnetizable material separated by nonmagnetizable material, with each strip provided with projections adapted to 'coperate with similar poles of a suitable magnetic chuck, so that when the device is in posi-l tion on such a chuck, each and every lamination in the base member is deinitely'energized and with adjacent laminations energized with different polarities of magnetism.

The bed on the base for the adjustable member is preferably provided with a longitudinal concavity which comprises sli htly more than one-half of a concave cylin rical surface. The adjustable memberof the device is constructed to fit this longitudinal o'pemng and the contacting surface of the adjustable device. is greater than the surface of the -opening to permit rotation of the device" and at the same time maintain the opening filled with metal. Y

The adjustable member preferably is also formed of alternate sheets of magnetizable the base and the plates in the adjustable member an incommensurate relation so that contact is assured at all times. The .fact that the opening is greater than one-half of the diameter of the cylinder provides an interlock between the base and the top. The

adjustable member may be positioned within the base by sliding the same longitudinally into the concavity, and it may be retained there by suitable plates mounted' on the ends either of the base vor the work-supporting member. These plates preferably are provided with scales which may comprise a main scale and a Vernier `scale inorder to permit' of an accurate adjustment of the work face ofv the adjustable member. The work face may be provided with an ular or -fiat surfaces or such other forms an shapes as 'may be desired. It may also be desirable to provide a pluralit of work-supporting members for a single ase so that by merely changing the adjustable member various ty es of Work faces may be rovided.

n order to insure the stability ofthe adjustable Work-supporting member, as when the current is bro en to remove work, it is desirable in some cases to provide a mechanical locking mechanism between the base and th adjustable member. .This mechanical lk may be obtained by many widely differing constructions, but preferably comprises the provision of set /screws extending through the side walls of the base member and at substantially diametrically opposite points, whereby the adjusted member maybe securely locked in adjustedposition at all times.v ,E

yReferring now to the drawings and more particularly to Fig. l, the base .member l comprises a plurality 4of sheets or laminations 2 of suitable magnet steel or other suitable magnetizable material which loses its magnetism quickly after the energizing cursheets of steel and brass are preferably brazed together to` form a unitary member, and where Babbitt metal is used it maybe necessary to provide 'cross rivets -or bolts of Viso lscrews 12 vnon.ma`gnetizable materialsuch`as brass to hold the parts together.

Preferably a pair of heavier jsheets and 6 comprise theside members for the base or tion. As will lbe notedby referring to igs.

l, 3, and 5, the lower'portion of the brass sheets terminates above the lowermost -portions of the steel sheets, and the-steel or iron sheets are provided with'projections 7 and 18 which are arranged in alternate series to comprisealternate rows crosswise of the de- 'f vice. These projections com rise bases` upon whichA the device is adapte to rest and as is illustrated in Figs. 3- andll. -One series of projections I'stand on one series of pole pieces in a suitable chuck, for example, the pole pieces 9, and are adapted to be ener-r gized with one magnetic'sign, and the other set or series of rejections 8 stand on a different set of pb e pieces 10 which are adapted to be energized by the opposite magnetic sign. `By thls arrangement it-will be seen that adjacent laminations are adapted to be energized differently, as ,is indicated in Fig. 4.

The upper portion of thcebase member l is(v provided with a c lindrical. concavity in which ismounted t e adjustable work support 11. Preferably set screws 12 are provided "on substantially diametricall vopposite sides of the work support 4. hese set preferably beai` against small shoes 14 which are in contact with the sides 4 of` the work-support and are adapted/to clamp this support lin adjusted thereby comprisinga mechanical ock for holding the work support in an adjusted position when the chuck is not energized.

The adjustable work support likewise is made' up of longitudinally extending strips of alternate magnetiz'able and non-magnetiz able material 15 and 16, preferably of steel and brass. These strips may be suitably secured together -by screws, brazln or otherwiseas is well known in the art. referably vthe Width of a combined brass and steel strip l in the adjustable work'sup ort, as compared comprises a Vernier l to the width of a strip of rass and steel in the base, is incommensurable. This prelation insurescontact between the steel strips in the adjustable work support and those in the base, irrespective'of the adjustment of l`the work support. It is also-,important that the width of the steel strips in the adjustvable work support shall' be' less than the widthof the brass in the base in order to prevent a steel strip in the work support from short-circuiting the steel strips. in the base whenithe adjustable member ds rotated. In order to indicate accurate adjustments of the work support, suitable scales 17 and 18 are provided. The scale 18 Vpreferably adapted to coperate with the scale 17. Preferably such scales or plates are `provided on' each end of the deable work support adjustably mounted upon said base ortion and also .comprising plurality o longitudinall extendlng alternate sheets of magnetiza le antl non-'magnetizable material, with the sheets 0f mag 'netizable materialy i-n the'work support of less thickness than the sheets at' non-mag- `netizable material in the said base portion.

' 2. An attachment for magnetic chucks and the like comprising the combination of a base portion of a plurality of longitudinally extending alternate sheets-of magnetizable and' non-magnetizable material, a movable work supportadjustablyl mounted upon said base portion and also comprising a plurality of longitudinally extending alternate sheets of magnetizable and non/-magnetizable material, with the sheets of ma netizable maf terial in the work support o v less thickness than the sheets of non-magnetizable material osition,

in the said base portion, and locking means between the base and the work support.

3. An attachment for magnetic -chucks and thelike comprisin thev combination of a base portion of a p urality of alternate sheets o force from the base portion to the work upon the work support, means whereby the adjacent magnetizable sheets in said base portion 'ma be`magnetized to comprise opposite magnetic poles when the said attachment is energized by a suitable magnetic chuck, and meanswhereby, said work support is normally interlocked with-the said base.

'4. An attachment for magnetic chucksv and the like comprising the combination of a base portion of longitudinally extending alternate sheets of magnetizable and non-A magnetizable material, a magnetizable worksupporting member, slidably mounted upon a curved surface upon said base portion whereby the work face of the said supporting member may be adjustably inclined relatively to the base ortion, an means comprising oppositely` isposed clamping screws to lock'the supporting member in position on the fbase. V y

5. An attachment for magnetic chucks described my invention, what Ir magnetizable and non-magnetizable material, a movable magnetizable work sup- -port adjusw'tably mounted upon said base portion and adapted to transmit lines of 2, or it maybe of any and the like comprising the combination ofa base portion having a plurality of longitudinally extending magnetizable sheets magnetically insulated one from another, a movable work support adjustably mounted Ito be rotatable upon said base portion and comprising magnetizable members adapted to be energized through inductance from said base portion when the base portion is energized by a suitable energizing means, and means 'to prevent longitudinal movement of the support on the base portion.

6. An attachmenltl for magnetic chucks and the like comprising the combination of a base member comprising a plurality of magnetizable portions insulated magnetically one from another, a movable work face also comprising a plurality of ma netizable sections 'magnetically insulate/ one from another and adapted to be slidably mounted upon said base portion, and mechanical means for locking the work support and the base together in adjusted position. a

7 An attachment' for magnetic chucks and the like comprisingthe combination of a base member comprising a plurality of magnetizable portions 1nsulated1 'magnetically. one from another, a movable work face mounted to rotate on a horizontal axis 30 and alsocomprising a plurality of magnetizable sections magnetically insulated one from another, land mechanical -means for locking the work support and the base together in adjusted position.

8. An attachment for magnetic chucks and the like comprising the combination of a base portion having a concave longitudinal opening, and a movable Work support adjustably mounted in the ,said opening in the base portion in such-manner as to be interlocked therein said base portions comprising a plurality of longitudinally extending alternate sheets of magnetizable and non-magnetizable material, and means provided on the magnetizable sheetsv for permitting al; ternate sheets to be magnetized asalternate magnetic poles by a suitable energizing means. i a

9. An attachment for' magnetic chucksv and the like comprising the combination of a base portion having a'concave longitudinal opening, and a movable Work support adjustably mounted in the said opening in the base portion in such manner as to be interlocked therein," said base portion comprising a L plurality of longitudinally extending alterand the like .comprising the combination of natesheets ofmagnetizable and non-magneti izable material, and su porting feet provided on the magnetiza le sheets with the feet alternately arranged for permitting alternate sheets to be magnetized as alternate :magnetic poles by a suitable energizing means. .r

10. An attachment for magnetic chucks a base portion of a plurality of longitudinally extending alternate sheets of magnetizable and non-magnetizable material and a movable Work support adjustably mounted upon said base portion and also com rising a plurality of longitudinally exten ing alternate sheets of magnetizable and non-magnetizable material, with the sheets of material in the Work support of an incommensurate thicknessrelatively .to the thickness of the sheets in the base portion.

11. An attachment for magnetic chucks andthe like com rising the combination of a base portion o a plurality of longitudi nally extending alternate sheets of magnetizable and non-magnetizable material, and La movable Work support rotatably slidable upon said base portion and also comprising a plurality of longitudinally extending alternate sheets of magnetizable and non-magnetizable material, with the sheets ofniaterial in the work su port of an inandl of an incommensurate thickness rela` tively to the thickness of the magnetizable material in the base portion, and lockingw means between the base `port.

' 13. An attachment for magnetic chucks and the like com rising the combination of abase portion o a plurality of longitudinallyT extending alternate sheets of magnetizable and`non-magnetizable material, a

apd the WorkJ supmovable work support adjustably mounted upon said base ortion'and also comprising a pluralit o longitudinally extending alternate s eets of magnetizable and nonmagnetizable material, withthe sheets of magnetizable m'aterial in the work support of less thickness than the sheets of non- 4magnetizable material in the said base portion and of an incommensurate thickness relatively tothe thickness of the magnetizable material in the base portion. f

14. An attachment for magnetic chucks and the like comprising the combination of a base portion of a lurality of alternate sheets of magnetizablg and non-magnetiza.-

ble material, said'base being provided-with l l a seat for a yWork support, a magnetizable y movable work support adjustably mounted A upon the seat on the said base portion, said l comprise two series whereby the magnetizwork support being provided with a work face adapted to be angularly disposed to said base by adjustments of said su port, and supporting feet on the magnetizable sheets in said base portion'and arranged to netizable and non-magnetizable material,'a

work-supporting member slidably mounted upon a curved surface upon said base portion whereby the work face of the said supporting member may be adjustably inclined 4 relatively to thebase portion,'and with the work-supporting member interlocked with the base portion. i

16. An attachment for magnetic chucks and the like comprising the combination of vbase portion.'-

a base of longitudinally extending alternate sheets of magnetizable and non-magnetizable material and provided with a longitudi-v nal trough having sides comprising more than one-half a cylinder, a work-supporting.

member rotatably slidably mounted within the said trough in said base ortion whereby the said supporting member 1s adj ustably interlocked with the base portion, and means to lock the supporting member in position on the base.

17. An attachment for magnetic chucks .and the like comprising the combination of a.

base portion having a plurality of longitudinally extending magnetizable sheets magnetically insulated one .from another, a movable work support adjustably mounted to be rotatable upon said base ortion and comprising magnetizable. mem rs adapted to be energized through inductance from said base portion when the base portion is energized y a suitable energizing means, locking lmeans to lock the'v base and support in adjusted positions, and means to prevent longitudinal movement of the support on the FRANK `L. siMMoNs.

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