US2588820A - Gauge - Google Patents

Description

March 11, 1952 H. H. GATES ET AL GAUGE Filed April 6, 1950 I 1% fdzzZ/Z fr 75 lid?!" 4 Patented Mar. 11, 1952 GAUGE Hassle-r H. Gates, Charlestowh, N. H., and Paul A. Grobey, Springfield, Vt., assignors to Bryant chucking Grinder Company, Springfield, Via, a corpnration of Vermont Application April 6, 1950, Serial No. 154,332

This invention relates to gages for measuring either internal or external diameters, or other distances, and has for an object to provide a precision gage of light weight, smooth in action, durable, and inexpensive.-

A further object is to provide such a gage in which the gaging pressure of the anvils against the work is uniform, irrespective of variations in manipulation by difierent operators.

To these ends, the gage comprises a pair of members, each supporting a gaging anvil, one of the members having a handle, and the other member being carried by the one member and yieldable in one plane relative thereto, a spring, which may be housed within the handle, applying the gaging pressure to the yieldable member in work-engaging direction.

For a complete understanding of this invention, reference may be had to the accompany ing drawings in which Figure 1 is a top plan view of an internal gage embodying the invention, the gaging anvils being omitted.

Figures 2 and 4 are detail sectional views on lines 2-2 and 4-4, respectively, of Figure 1.

Figure 3 is a side elevation of the gage, a portion of the handle being broken away.

Figure 5 is a detail sectional view through the attachment of a reed to one of the members.

Figure 6 is a top plan view; similar to Figure 1, :but showing thread gaging anvils in position to receive a work piece for gaging.

Figure 7 is a view similar to Figure 6, but showing an external gage embodying the invention.

Figure 8 is a fragmentary view similar to a portion of Figure 2, but for the external gage shown in Figure 7.

Referring to the construction shown in Figures 1 to 6, at I and 2 are shown two members with pads for supporting gaging anvils. One of these members, as I, is provided with a hollow handle 3. The other of said members 2 is secured to the member I for motion transverse to the handle 3 in one plane. This means, as shown, comprises a pair of spaced parallel reeds 4. Each of these reeds is secured at one end as by screws 5 to the member I, and the otherend of each reed. is secured as by screws 6 to the member 2. As shown best in Figure 2, these reeds 4 are of substantial width, thus to afiord substantial resistance to relative motion of the members 1ongitudinally ofthe handle '3, but permitting the member 2 to be moved transverse to the handle 3 in a single plane and in substantially a rectilinear direction. A

Since the gage shown in Figures 1 to 6 are for internal gaging, the members are provided with anvil elements I0 and II, and for thread gaging these anvils have their shank portions I2 externally threaded for portions of their circumference as at 14 for gaging engagement with internal threads of a work piece. The anvil I0 is shown as secured-to the movable member 2 as by screws lit-while the anvil II is secured to the fixed member -I as by screws I3. As shown, the members I and 2 are provided with pads shaped to receive feet I6 of the anvils.

A leaf spring 20 is shown housed within the hollow handle 3, one end ofthis spring being supported and restrained by the reduced end of a screw 2| fitted in a hole in the spring, and the other end 22 engaging against an edge 23 on the movable member -2. Intermediate the ends of the spring 20, it bears against a fulcrum projection 25 on the inner surface of the handle 3.,

With this arrangement the spring 20 presses the movable member 2 to the right, as viewed in Figure 2, and under a pressure which may be adjusted by adjustment of the screw 21. This direction of motion of the movable member I is' that required to close the anvils against the work, separating the anvils'from each other. The extent to which this may :be done by the spring 20 is determined byan adjustable stop screw 26 threaded through a portion 21 of the movable member 2 and held in adjusted position as by a set screw 28.

The gage may be opened to permit of its insertion in the work or the placing of the work thereon by pressing upon a finger piece 28 projecting downwardly from the movable member 2 and provided with an adiustable stop screw 29 to limit the opening movement. During this opening movement the anvils I0 and II are pressed toward each other. Q

The reeds 4 have thickened end portions 38, shown best in Figure 5, which are provided with holes,,having tapered sides 3| in register with tapered sides 32 of holes in the supporting memhers I and 2, respectively. These holes are for the reception of the conical portions of the heads of screws 33 by which the reeds are positively secured and fastened to said supporting members. This construction provides a rigid and secure fastening of these parts together. The fixed member I, as best shown in Figure l,

is provided with a lateral extension 35 having a split bearing portion 36 to clampingly receive the a screw 39 being employed for clamping the split portions 36 together, thus gripping the sleeve 31. An indicator actuating stem 40 is slidable through the sleeve 31 and may be engaged by an arm 4| projecting from the movable member 2. These parts may be so adjusted that when an internal threaded ring of a standard size is passed over the gaging anvils and the spring 20 is then allowed to press the anvils into proper gaging engagement with this ring, thepointer of the dial indicator 38 is at the zero mark. Any deviations of the pointer from this zero mark then occurring when an internallythreaded hole is being measured will indicate either under or over size of the threaded hole.

It will be noted that both of the anvils are positioned between the reeds 4, so that the gaging forces are exerted in such a manner as to aiford minimum undesirable eccentric stresses on the parts, and that the reeds which are relatively wide, impart great stiffness against any relative motion of the members other than that desired for gaging and releasing actions.

Figure 6 shows the anvils for internal gaging, the anvils being in gage-open position, facilitating the placing of a work piece W thereover.

While this invention is not concerned with the particular configurations of the gaging elements, they are shown as those more completel illustrated and forming subject matter of a cc-pendin application for Letters Patent of one of the present inventors.

In Figures 7 and 8 a gage of this same general typeis illustrated, but in which external gaging is accomplished, the relatively movable member 200 carrying the external gaging anvil 58 and the relatively fixed member carrying the external gaging anvil 5|. These members are secured together as by the reeds 4, as previously described, and the movable member 200 is provided with an arm 52 for engagement with the stem 40 of the dial indicator 38, the sleeve 37 of which is clamped to the extension 53 of the relatively fixed member i. This member I also carries a hollow handle 3 as shown in Figure 1,

' but the spring 20 engages the movable member 200 to move this member in the opposite direction from that provided for in the internal gage. To this end the upper end of this spring extends through a perforation 55 through the member 200 and bears against the outer wall thereof as shown in Figure 8. A finger 60 carried by the movable member 200 may then be engaged by the operators fingers and moved away from the handle 3 in order to open the anvils for the removal or replacement of a work piece. screws 26 and 29 may be employed to limit the motion of the movable member as in the internal gage. Where this work piece is an externally threaded member, these anvils will be provided Stop with threaded gaging contours and while any suitable anvils may be employed, the ones illustrated in Figure 7 are those more completely shown and claimed in the application of one of the present inventors, to which reference has been made. It will be noted that with this form of gage, also, the gaging anvils are positioned between the reeds I.

From the foregoing description of certain embodiments of this invention it will be evident to those skilled in the art that various changes and modifications may be made without departing from its spirit or scope.

We claim:

In combination, a pair of anvil supporting members, a gaging anvil carried by each of said members, a pair of reeds arranged in parallel relation one end of each of said reeds being secured to one of said members and the other end of each of said reeds being secured to the other of said members, said reeds supporting one of said members for yieldin rectilinear motion relative to the other of said members in direction to move said anvils relatively from and toward each other to open and close said gage, an indicator carried by one of said members and provided with an actuating stem in controlled relation to the other of said members, a hollow handle carried by one of said members and extending transverse to the plane of relative motion between said members, a leaf spring within the hollow of said handle, a handle-carried element engaging said spring adjacent to one end, the opposite end of said spring operatively engaging the other of said members, said handle having a fulcrum portion engaged with said sprin between its ends, said spring normally urging said movable member toward gage-closed position, and a finger element carried by said other member in position to be engaged by a portion of the hand grasping said handle and be moved in opposition to said spring to open said gage.

HESSLAR H. GATES. PAUL A. GROBEY.

REFERENCES CITED The following references are of record in the file of this patent:

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