US2202425A

US2202425A - Hand milling machine

Info

Publication number: US2202425A
Application number: US99037A
Authority: US
Inventors: Newman M Marsilius
Original assignee: VAN NORMAN MACHINE TOOL CO
Current assignee: VAN NORMAN MACHINE TOOL CO
Priority date: 1936-09-02
Filing date: 1936-09-02
Publication date: 1940-05-28
Anticipated expiration: 1957-05-28

Description

N. M. MARSILIUS HAND MILLING`MACHINE Filled sept. 2, 193.6

May 2s, 1940.

2 Sheets-Sheet 1 )Z1/Mmm ATTORNEY May 28, 1940.

N. M. MARslLlus HAND MILLING MACHINE Filed Sept. 2, 1936 2 sneets-sneet 2 INVENTOR Mns-Zins A TTORNEY -uNlTEc STATES PATENT "ol-FICE f `aztecas HAND MmLrNG MACHINE Newman 4M. Marsilius, Bridgeport, Conn., as-

signor, by mesne assignments, to van Norman y Machine Tool Company, Springfield, Mass., a

- corporation of Massachusetts Application September v2, 1936, Serial No.. 99,037

I 3 Claims.'

My invention relates to new and useful improvements in milling machines, of the hand operated class, and of the type designed to be ldriven by power such, for instance, as an elec'- tric motor. The machine is designed for various kinds of relatively light milling operations and is adapted to use different kinds o f commercial milling cutters, and while driven by power, is provided with hand feeding means as well as hand adjusting means for raising and lowering the worktable and milling cutters one with respect to the others.

It is the purpose of my invention to improve upon this class of hand millers by providing novel lowering the cutterarbor to accomodate milling cutters of various diameters, as well as for determining the depth of the cut to be milled.

The invention further comprises the particular arrangement of the parts and gearing necessary to make the foregoing adjustments and to provide lappropriate driving ratios, and the description herein given is to be regarded merely as an example of the manner in which the invention can be carried out without binding it to the speciic details thereof. f

In the accompanying drawings forming a part of this specication like characters will be found to designate similar parts throughout the several figures and of which:

Fig. 1 shows a front elevation of my improved hand mining machine. Y

Fig. 2 -is a sectional elevation off-the same as seen from the right of Fig. l, the spindle bearings being shown in vertical section.

Fig. 3 shows a side view as seen. from the left of Fig. 1, and

Fig. 4 shows a verticali sectional view taken on line 4-4 of Fig. 3 which more clearly illustrates the belt drives and novel means of 'adjusting the Same.

Referring in detail to the characters of reference marked upon the drawings I indicates ahollow pedestal or column formingA a vframe and footing and having suitable openings in its side portions to accommodate .diiferent elements (Cl. 'I4-219) of the machine. These openings upon one side are inclosed bya door ll that is normally retained closed by a turn rlatch l2. 'rms door and t v its opening permits access to the interior of the column for such purposes as and when necessary.

I3I indicates asecond door which is hingedly attached to the back of the machine and serves to inclose openings in the column and cover the exposed end of the driving shaft 5l which is sometimes used for gearing connections not shown. This door is also provided with a knob and turn latch I5 for holding'it in a closed position.A f

The machine `includes a table support I6 for carrying the work table Il and vits operating parts. Suitable guide ways I8 are formed on the side ofthe column to receiveways I9 of the table support to permit the same to be moved vertically with respect to the column.

'Ihe means for raising and lowering this table support vertically is shown in Figs.\ 1 and 3 and consists of a hollow post carrying a'threaded .sleeve 2l that receives a screw 22 the upper end of which is mounted in a fixed bearing 23 and carries a bevel pinion 2l that meshes with and drives a similar bevel pinion 25 mounted upon the shaft 26. This shaft is journaled in suitable bearings of the table' support and is provided with an exposed shouldered end portion 2'l to receive an operating crank, not shown', whereby the shaft 26 and the screw 22 may be turned and the table support raised and/or lowered through the threaded screw connection and the fixed threaded sleeve 2l.

' A suitable gib 28 is provided for the table support, see Fig. 3and also a pinch screw 29 which serves to retain the table support in its adjusted position.

The top side of this Atable support, see Fig. 1, is provided with dovetailed ways 30 to receive corresponding ways 3| in a bed 32 that extends out over opposite sides of the table support and is provided with dovetailed guide ways 33 running longitudinally of its top side to receive corresponding guide ways 34 formed in the underside of the longitudinal movable table l1.' l

'I'he bed 32 is made adjustable upon the ways 3'0 through the medium of a screw 35 which is threaded to engage a threaded br'acket VMisecured to the underside of the bed and is providedwith an exposed shouldered head 31 upon which a crank may be applied foroperating the screw for adjusting the bed with respect tothe tablev support as may be necessary. A shaft!! is journaled crosswise withinV the bed, carries "a'gsmall lgear 88 mounted within a suitable opening of thebed and meshes with a rack 4l secured to the underside of the table and extending lengthwise thereof so that the table may be moved through the operation of the handle 4I and the rotary movement 1of the shaft 88. Suitable adjusting stops 42 and 43, see Figs. -1 and 2 are secured to the side of the table to limit the backward and forward movement of the tables. These stops are adjustably secured in spaced relation to each Iother and are designed to be operated with relation to a ilxed stop 44 secured to the bed. 45 represents a T slot in the table in which the head of a T bolt 45 is slidably mounted. This T bolt as will be seen supports a block that carries an adjustable stop .screw 41- which in practice serves to abut against the fixed stop 44 and thus'limits the hand movement of the table, it being understood that by the adjustment of one or both of the stops the movement of the table may be lengthened or shortened as may be necessary to provide the required movement of the table and work piece when supported thereon.

The milling cutters and associatedl elements of the machine are operated from a motor 48 located upon the top of the column. This motor is mounted upon a platform 48 one end of which is hingedly connected as at 50 to the top of the bed while the other end is adjustably supported upon4 the bed through thel medium of a screw 5I that is hingedly connected to a bracket 52 secured to the top of the column and extends up through the platform 48 and is provided with nuts 53 whereby the platform and its motor may be adjusted, raised and lowered with respect to the column, so that the belts 54 extending from the pulley 55 of themotor to the pulley 56 on the drive shaft 51 can be attached, removed and adjusted.

The drive shaft is journaled in opposite side portions of the column and in addition to the pulley 56 carries a driving pulley 58 that is connected by a belt 58 with a cone pulley 50 on a short shaft 6I journaled in an upright 62 and carrying a pulley 63 for driving the cutter spindle 84. The upright 62 is provided with a relatively large hole or bore therethrough to receive an eccentric 55 that is journaled upon the before mentioned drive shaft 51 and in a bearing of the column and is provided with an arm 68 secured to one end portion of the eccentric and whereby the same may be turned upon the shaft in a manner to slightly raise or lower the upright 62 for the purpose of tightening and loosening the belts 58 connecting the two cone pulleys and so that the said belts may be shifted from one set of pulleys to another. The periphery of the hub portion of the arm 68 is preferably provided with a series of small teeth that are engaged by a pawl 61 pivotally con-- nected to the upright 62 and that serves to hold the arm and its eccentric in xed positions with,

respect to the upright. A beltn88 connects the pulley 63 with the pulley 58 on the cutter spindle 84 for driving the same and its arbor 18..

The upper portion of the upright 82 is provided with a vertical slot 1l to accommodate a slide block 12 through which a guide rod 13 extends. One end of this rod is secured to the column as at .14 while the other end portion extends through the guide block 12 in the'upright`62 and is provided with a nut 15 used for adjusting purposes. A spring y16 is carried by this guide rod and one end abuts against the innerwall of the column and the other upon the iner side of the upright in a way to tend to shove the upright 82 and its pulleysy forward to normally -retain a tension on the belt I4 which drives the pulley 88 on the cutter spindle I4.

The cutter spindle I4 is journaled in a housing 11 that is mounted for vertical adjustment on the side of the column and carries an adjustable extension rod 18 which in turn carries the arm 18 for carrying the centering pin 88 that supports the outer end of the cutter arbor 18. The housjournaled in this housing and carries belt pulley 88 upon one end that is driven through the belt 88 from the pulley 83 and upon the other end is a tapered socket to receive the tapered end of the cutter arbor 18 that carries the milling cutter 85. Avertically disposed rack 86 is secured to the side of the column and is engaged by a toothed segment 81 rockably mounted on a sleeve 88 carried by the housing 11 and surrounding the cutter spindle 84. This segment is provided with a handle 88 by means of which the segment can 7 be turned on its bearing in a manner to ride on the teeth of the rack 85 and thus raise or lower the housing and the parts carried thereby. In

y this connection it will be 'observed that the toothed segment engages the rack through an opening 90 inthe back of the housing. A counterbalancing means is provided for this housing and the load carried therewith which consists in a weight 8l suspended from a rope or chain 82 that passes over pulleys 83-83 and is attached to the housing as at 84. 'This obviously serves to reduce the resistance to the operation of the segments and allows the housing to be freely raised and lowered by the handle 88.

From the foregoing detailed description it will be seen that the machine as designed andl built is driven from the motor which has been designated as 48. This is belted to the pulley 56 on the drive shaft 51. This shaft is journaled in the ilxed bar of the frame and through a rotatable eccentric member supports an upright which in turn has the shaft j'ournaled therein carrying pulleys upon its two end portions. A pulley 58 on the shaft 51, through the belt 58, Vdrives a pulley 88 on the short shaft 6|. The cutter spindle is connected by the belt 88 from the pulley 63 to the pulley 68 on the cutter spindle. The machine as will beseen is designed to be driven through V belts which are made up as one piece belts and therefore provision is made for adjusting the lshafts and lpulleys with respect to each other whereby the belts may be attached, removed or shifted from one pair of pulley faces to others. 'I'his adjusting as explained is done through the handle 66 on the eccentric in the one instance, and the handle on the segment and the compression of the spring 18 in the other. As a result of these improvements the machine is very much more desirable as a commercial and operatable proposition since it canbeyvery Ieasily operated by a single attendant and upon it most kinds of hand milling can be performed to advantage and more rapidly thanhas heretofore been accomplished.

asoman Having thus described my invention what I claim and desire to secure by Letters Patent is:

l. The combination of a column, a drive shaft journaled in the column, an eccentric rotatably mounted upon the driving shaft, operating means for turning the eccentric upon thedriving shaft, said driving shaft being provided with-a driven and driving pulley, an upright carried `upon the eccentric, a second shaftjournaled in the vupper portion of the upright, a driven and driving pulley mounted on said second shaft, a housing carried upon the column, a third shaft carried by the housing, belts connecting the pulley on the driving shaft with the pulley on the driven shaft and for connecting the driving pulley of the driven shaft with the pulley on the third shaft, means as betweenthe column and the upright for providing a tension upon the beit driving the pulley on the third shaft, and means for adjusting said tensioning means.

2. The combination of a column, a drive shaft journaled in the column, an eccentric rotatablyl mounted upon the driving shaft, operating means for turning the eccentric upon the driving shaft, said driving shaft being provided with a driven and driving pulley,'an upright carried upon the eccentric, a second shaft journaled in the upper,

portion of the upright, a driven and driving pulley mounted on said second shaft, a housing carried upon the column, a third shaft carried by the housing, means for raising and lowering the housing and third shaft with respect to the upright, belts connecting the pulley on the driving shaft with the pulley on the driven shaft and fork connecting thedriving pulley of the driven `shaft with the pulley on the third shaft, means as between the column and the upright for providing a tension upon the belt driving'the pulley on the third shaft.

3. The combination of a column, a'drive shaft journaled in the column, an eccentric rotatably mounted upon the driving shaft, operating means for turning the eccentric upon the'driving shaft, said driving shaft being provided with a driven and driving pulley, an upright carried upon the eccentric, a second shaft journaled in the upper portion of the upright, a driven and driving pulley mounted on said second shaft, a housing carried upon the column, a third shaft carried by the housing, a rack secured to the column, a seg- ,ment loosely journaled upon the third shaft and engaging the rack for raising. and lowering the housing and third shaft with respect to the co1- umn, belts connecting the pulley on the driving shaft withA the pulley on the driven shaft and forv connecting the driving pulleyl of the driven shaft with the pulley on the third shaft, means as between the column and the upright for providingv a tension upon the belt driving the pulley on the third shaft.

, NEWMAN M. MARBILIUS.