US2124006A - Dial test indicator - Google Patents

Description

July 19, 1938. J. w. PARKER DIAL TEST INDICATOR Filed Oct. 18, 1934 ATTORNEYS. y

Patented July 19, 1938 UNITED STATES PATENT OFFICE DIAL TEST INDICATOR John W. Parker, West Barrington, R. I., assigner to Brown & Sharpe Manufacturing Company, a corporation of Rhode Island Application October 18, 1934, Serial No. 748,971 8 Claims. (Cl. 248-124) This invention relates to a dial test indicator, Fig. is a perspective View of the bracket which .and has for one of its objects the provision of embraces the upright standard;

means for securing the movable vertical stand- Fig. 6 is a perspective view of the'swivel memard in position, which means is more easily operaber which is mounted on the bracket and through 5 ble and accessible than the securing means which which the gage supporting arm extends. 5

have heretofore been provided for such standards. The usual dial test ,indicator has its clamping Another object of the invention is the provision means adjacent its base, thereby preventing the of a securing means for the standard, which will bracket which carries the gage supporting arm permit the gage supporting arm to be lowered from being lowered close down to the base and 10 closer to the base than has heretofore been rendering the `clarrlpirlgmeans Very inaccessible 10 permitted v especially when this bracket is in close adjacency Another object of the invention is the provision thereto. Further, heretOfOre the upright Supof a. more efficient and smoother `acting guide for port although it may be adjusted along the base, 1 the upright standard than has heretofore been is supported in a block sliiable in a groove and provided, this block which carries the standard slides lalong 15 Another object of the invention is the provithe bOOmOf the gI'OOVe Which aiiiiOllgh milled, sion of means by which the standard will be slid gives d .lumpy 01 jerky laction, and in Order t0 upon a finished outer surface in its movement imPTOVe D011 this type 0f indicator. Ihave PIO- from one position to another rather than on the Vided a Clamp Which iS` Operable at the Upper unfinished bdttom of a groove so that easier slidend 0f the upright Standard thereby Permitting 20 ing may be had of the standard along the base. the bracket to be lowered close to the base and Another object of the invention is the provi- Positiomng the clamp S0 that it Wm be readily sion'of a lighter and yet stronger and more rigid eecessible et au times for easy and fighter ad' standard extending upwardly from the base. Justment' Furthe?" I support the upnght stand' Another object of the invention is the proviare on the more hlgmy finished upper surface of 25 Sion of a Standard providing increased surface the baseso that easy and even sliding action can for engagement with the bracket which carries be had along the pase; and the following is a the gage mounting am. more detailed description of the present embodi- Another object of the invention is the mmm ment of this invention, illustrating the preferred sion of a standard which will be stronger in prcgleans by Tfhcl these advantageous results may 30 e accomp 1s e 1 ggllccio Welght than standards of prevloue With reference to the drawing, I0 designates A further object of the invention is the provile?glclhsdyarglhrslcr th sion of a plurality of entirely independent adjusti d t f th r t p an.

3 `ments so that the operator may more nicely ad- '55163 lrc o e strlftlre above 1t' Tels 35 just the position of the gage without exercising grasping the Tne ai.; glove it 05h51?? Velsc rg @elfe m pfeventmg the dlsturbmg of e' prevmus vided with an inverted T-shaped slot as at I2 in adlllstmentits upper finished surface I3 and a duplicate slot 40 With these and Other Objects in View, the in' I4 in the lower finished surface I5. The head 40 vention consists of certain novel features of conportion |5 of the inverted Tashaped slot |2 pro.. struCtiOn, 21S Will be more fully described :and vides an undercut I1 with overhanging portions n Particularly POiIl'ed 011i? in the appended Cia1m5- I8 which have finished edges along the narrower In the accompanying drawing: or stem portion I9 of the T opening. Fig 1 iS a Perspective Vle-W ofthe dial test 1nd1- Upon the upper surface I3 of the base a bush- 45 cator complete; ing 20 is slidably mounted with its angelportion Fig. 2 is a central section through the Support- 2| engaging the upper finished surface I3 of the ing Standard 0n Substantially line 2--2 of Figbase and with a tongue projection 22 extending ure 1; into the slot I9 and engaging the opposite edges Fig. 3 is a top plan view partially broken away 23 thereof, so that this bushing will be guided in 50 and in section to show the connection of the its sliding movement by means of the opposite gage to its supporting arm; edges of this slot. A tubular standard 24 has a Fig.v 4 is a fragmental detailed View showing the bore 25 tightly receiving the outer surface of the tongue at the lower end of the upright standard bushing, and at its lower end 26 engaging the n entering the slot in the base; iiange 2|. This standard being tubular isc'om- 55 paratively large in diameter and provides an enlarged engaging surface for a bracket 21 which will presently be more fully described, and is also desirably lighter and stronger than a solid standard.

The upper end 28 of the tubular standard has a bore 29 receiving a bushing 3U, which bushing provides an upper abutment surface 3i for the bottom of a hub 32 of the wheel or handle 33 secured on the 4upper end of the rod 34 by pin 35 so that the rod may be turned by the handle. This rod 34 extends downwardly through the standard and through a bore 36 in the bushing 20, which bore is of a size larger than the slot I9 and tongue 22. The rod at its lower end is reduced in diameter as at 31 and threaded as at 38 to engage a nut 39 which is slidably received in the wider portion of the inverted 'IT-shaped slot, and thus extends beneath the overhanging portions I8 of the base, so that as the rod 34 is rotated by means of the handle 33, the nut 39 will be drawn up tightly against the under surface of the overhanging portion I8 and a downward thrust will be transmitted from the hub of the handle through the bushing 30 and tubular standard 24 to the flange 2| of the bushing 20 to force the bushing snugly against the upper surface I3 of the base, and thus this standard will be bound firmly in adjusted position along the base.

By reason of the above construction, the entire superstructure is carried by the bushing 20 which engages the surface I3 and even the rod and nut when the nut is loosened, is carried by this support so that the entire weight is supported upon the bushing, and by reason of the finished engaging surface I3 and the under finished surface of the bushing this standard may be easily and evenly slid along. the base to the desired adjusted position and there easily and quickly clamped by reason of the handle 33 at the upper end of the standard.

'I'he bracket 21 shown in perspective in Figure 5 is split as at 40 with ears 4I and 42 drilled as at 43 for the reception of a bolt 44 having a head 45 suitably sunk into a recess 46 in one of the ears while the threaded portion 41 projects beyond the other ear to receive the tubular nut 48 operated by means of a lever handle 49 for forcing the ears toward each other and contracting the opening 50 through the bracket for binding it `upon the standard and holding it in adjusted position therealong. This bracket is provided with a disc-like extension 5I having a finished face 52 with a pin 53 extending through opening 54 in the center thereof. This pin is provided with a head 55 suitably sunk into the back portion of the extension and pivotally mounted upon the pin I have provided a swivel member 56 having an opening 51 in the center of a disc-like portion 58 to receive the pin 53. The face of this portion 58 has a finished surface 59 to engage the surface 52 and be bound snugly thereagainst by means of a nut 68 engaging threaded portion 6I of the pin 53 and forcing this member so that the abutments 52 and 59 snugly and firmly engage.

The swivelmember 56 is pro-vided with a sleeve portion 62 having a bore 63 to receive the tubular arm 64 which provides a substantial engaging surface and is held in adjusted position in the sleeve by means of a set screw 65 threaded thru the boss 66 so that its end 61 will engage the surface of the arm and apply suflicient pressure thereon to hold it in adjusted position. The head 68 may be knurled so as to be more easily operated by the thumb and finger.

At the outer end of the tubular arm 64 I have provided a member 69 which ts the bore 'I0 oi' this arm and is held therein by a pin 1I. 'I'his member 69 is half cut away at one end 12 to receive along one of its surfaces the projecting lug 13 fixed on the back of the gage 14. This portion 12 and the lug 13 are provided with registering openings thru which the bolt 15 extends with its threaded surface 15 projecting beyond the lug and engaged by the 'nut 11 operated by handle 18 so that adjustment of the gage may be had at the end of the arm.

It can be seen by the above that many adjustments may be had and that each of these adjustments is secured individually and separately from any of the other adjustments so that practically any position of the gage may be had to cause it to engage work, such for instance as might be required in checking the true running of a spindle or a cutter or the inside or outside running diameter of some rotative part. The device is simple and with regard to similar` devices heretofore manufactured, is stronger and more rigid, although its superstructure parts weigh less. Its operating parts are more accessible and by reason of the provision of increased bearing surfaces tighter and firmer clamping action may be had, and adjustments may be more smoothly and easily effected for obtaining greater accuracy and speed in setting the device for operation.l

The foregoing description is directed solely towards the construction illustrated, but I desire it to be understood that I reserve the privilege of resorting to all the mechanical changes to which the device is susceptible, the invention being defined and limited only by the terms of the appended claims.

I claim:

1. In a dial test indicator, a base having a finished upper surface and a slot opening into said surface, a bushing having a flange slidable on said surface with a depending portion entering said slot andengaging the opposite sides thereof to guide said bushing and prevent rotation thereof, a tubular standard embracing said bushing and extending upwardly from said flange, and means for clamping said bushing to said surface and the standard to said bushing.

2. In a dial test indicator, a base having a finished upper surface with a slot therein, a bushing having a flange slidably engaging said surface and provided with a tongue projection extending into said slot and engaging the edges thereof to guide the bushing in its sliding movement, a tubular standard embracing said bushing and resting on said flange and extending upwardly therefrom, and means operable at the upper end of said standard for clamping it in adjusted position on said base to draw the bushing in engagement with said surface.

3. In a dial test indicator, a base having a finished upper surface with an inverted T-shaped slot therein providing undercut portions and opening into said surface, a bushing having a flange slidably engaging said surface and provided with a depending projection extending into said slot and engaging the edges thereof to guide the bushing in its movement, a tubular standard embracing said bushing and resting on said flange and extending upwardly therefrom, a nut in the undercut portions of said slot, and movable means extending through said standard and engaging the nut for drawing said nut up and the bushing down into engagement with said surface to clamp said standard in adjusted position on said base.

4. In a dial test indicator, a base having a finished upper surface with an inverted T-shaped slot therein providing undercut portions and opening into said surface, a bushing having a iiange slidably engaging said surface and provided with a tongue projection extending into said slot and engaging the edges thereof to guide the bushing in its movement, a tubular standard embracing said bushing and resting on said ange and extending upwardly therefrom, a nut in the undercut portions of said slot, and means including a rotatable rod extending through said standard and operable at the upper end thereof engaging said nut for drawing it up and the bushing down into engagement with said surface to clamp said standard in adjusted position.

5. In a dial test indicator, a base having a finished upper surface with an inverted T-shaped slot therein providing undercut portions and opening into said surface, a bushing having a ange slidably engaging said surface and provided with a bottom finished surface and a projection thereon extending into said slot and engaging the edges thereof to guide the bushing in its movement, a tubular standard embracing said bushing and resting on said flange and extending upwardly therefrom, a nut in the undercut portions of said slot, and a rotatable rod extending through said standard, a handle at the upper end having an abutting surface to engage the upper end of the standard for drawing the nut up and the bushing down into engagement with said surface to clamp the parts in adjusted position.

6. In a dial test indicator, a base, a tubular standard, means for slidably and non-rotatably mounting said standard on said base, means operable at the top portion of said standard for clamping it in adjusted position, a bracket embracing said standard, independent means on one side of said bracket for securing it in adjusted position on said standard, a member swivelly mounted on said bracket provided with 5 a sleeve, a gage supporting arm extending through said sleeve, means provided on the other side of the bracket for securing said swivel member in adjusted position on said bracket and independent means on the same side as the swivel securing 10 means for holding the arm in adjusted position in said sleeve.

7. In a dial test indicator, a base, a tubular standard, means for slidably and non-rotatably mounting said standard on said base, means oper- 15 able at the top portion of said standard for clamping it in adjusted position, a split sleeve bracket embracing said standard, a screw for contracting said bracket for securing it in adjusted position thereon, a pin extending from said bracket threaded at one end, a member pivotally mounted on said pin and provided with a sleeve, a gage supporting arm slidable through said sleeve, a nut engaging the threads of said pin for applying pressure on`said `member to force it against said bracket and hold it in adjusted position, a set screw threaded through said sleeve to engage said arm to hold the arm in adjusted position in said sleeve, and swivel connections at the end of said slidable arm for adjustably supporting a gage thereto.

8. In a dial test indicator, a base having a finished upper surface, a tubular standard, tongue and groove connections for slidably and nonrotatably mounting said standard on said surface of said base, and means acting through said standard and operable from the top of the standard for clamping said standard in adjusted position on said base and in engagement with said surface thereof.

40 JOHN W. PARKER.

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