US3032885A - Centering device - Google Patents

Description

May 8, 1962 Filed Jan. 5, 1960 P. HRYCENKO CENTERING DEVICE Fig.

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Uited States Patent O 3,032,885 CENTERING DEVICE Peter Hrycenko, 86 Marcella St., Boston, Mass. Filed Jan. 5, 1960, Ser. No. 568 6 Claims. (Cl. 33-185 The present invention generally relates to a centering device and more particularly to a device for use in conjunction with various machine tools and the like for indicating the relationship of the tool to the work whereby the tool may be set in a predetermined angular relation to the work or centered in relation to the work depending upon the nature of the tool and the operation to be carried out by the tool.

The primary object of the present invention is to provide a centering device for use in conjunction with machine tools especially such'as are employed in lathes and the like for indicating the relationship of the tool and the work so that this relationship may be set at a desired orientation depending upon the particular operation of the tool on the work.

Another object of the present invention is to provide a centering device in accordance with the preceding object in which the centering device basically incorporates two components with one component being counterweighted and the other component pivotally supporting the counterweighted component and adapted to be received between the tool and the work whereby the supporting component will be disposed substantially tangential to the work or perpendicular to the line of force exerted by the tool whereby the counterweighted component will indicate the angular relationship of the tool and the work by indicia carried by the pivotal counterweighted component.

A further object of the present invention is to provide a centering device which is extremely simple in construction, easy to use, relatively accurate and relatively inexpensive to manufacture.

These together with other objects and advantages which will become subsequently apparent reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming a part hereof, wherein like numerals refer to like parts throughout, and in which:

FIGURE 1 is an enlarged front elevational view of the centering device of the present invention;

FIGURE 2 is a side elevational view of the centering device of the present invention;

FIGURE 3 is a detail sectional view taken substan tially upon a plane passing along section line 3-3 of FIGURE 1 illustrating further structural details of the invention;

FIGURE 4 is a detailed sectional view taken substantially upon a plane passing along section line 4-4 of FIGURE 2 also illustrating further structural details of the device;

FIGURE 5 illustrates the centering device of the present invention in use for indicating the tool as being set by degrees above the center line or zero degree mark for turning work on an outside diameter; and

FIGURE 6 illustrates the manner of use of the invention for indicating the tool set at the center line or zero degrees for use in boring an inside diameter in the work.

Referring now specifically to the drawings, the numeral 10 generally designates the centering device of the present invention which includes an elongated generally rectangular plate or body 12 having parallel surfaces, parallel end edges and parallel side edges. Adjacent the upper end of the plate or body 12 there is provided a relatively narrow longitudinal slot 14 and a relatively wider longitudinal slot 16 communicating with the lower end of the narrow slot 14.

Mounted and disposed within the slots 14 and 16 is a 3,032,885 Patented May 8, 1962 pivotal indicator plate member 18 having a generally circular lower end portion 20 and a reduced neck portion 22 and an arcuate upper end portion 24 having a graduated scale and numerical indicia 26 thereon with the graduating scale having a zero mark at the center and being graduated from zero to ten or fifteen degrees in both directions from the center. The center of the plate member 18 is provided with a bearing pin 28 having conical end portions 30 received in bushings or bearings 31 that are disposed in sockets 33 in the elongated plate 12. Also, the lower end of the circular portion 20 is provided with an arcuate notch 32 defined by ends engageable with the plate 12 to limit the pivotal movement of the plate member 18. Also mounted on the pin 28 is a generally U-shaped counter-weight 34 having a bight portion 36 extending under the rounded end 20 and being disposed in the notch 32 as illustrated in FIGURE 3.

In use of the present invention, the plate or body 12 is disposed between the tool 38' and work 40. When pressure is applied against the tool 38 towards the work 40, the plate or body 12 will be angulated as illustrated in FIGURE 5 while the weight 34 maintains the indicator plate 18 vertical so that the angle of inclination of plate 12 may be read on the graduated scale 26. This will indicate the orientation of the tool 38 in relation to the center line of the work 40 and specifically indicate this orientation in degrees above or below the center line of the work.

FIGURE 6 illustrates a similar arrangement in which the centering device is disposed between a tool 42 and work 44 in which the tool 42 is aligned with the center line of the work or in zero degrees relationship thereto whereby the centering device will indicate the center line and the relationship thereof to the tool 42. Of course, the device may be used with various types of tools including lathe tools or the like for orientating the tool in the proper relation to the center line or gauging the tool to see if it is properly set in relation to the work' The foregoing is considered as illustrative only of the principles of the invention. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction and operation shown and described, and accordingly all suitable modifications and equivalents may be resorted to, falling within the scope of the invention as claimed.

What is claimed as new is as follows:

1. A centering device for determining the relationship between work and a tool approaching the work comprising an elongated plate adapted to be received between the tool and the work for orientation in perpendicular relation to the line of opposing contact between a tool and its work, said plate having a slot therein adjacent one end thereof, a weighted indicator plate member pivotally mounted on said plate and disposed in said slot for swinging movement in a plane substantially normal to said plate under the influence of gravity, and a graduated scale on said indicator plate member for indicating the position of the indicator plate member relative to the elongated plate thereby indicating the angular relation of the plate and the degrees above the horizontal center line of the tool in relation to the work.

2. The structure as defined in claim 1 wherein said indicator plate member is provided with a transversely extending tapered pin having generally conical outer ends, bearing means mounted on said plate for pivotally supporting the indicator plate member.

3. The structure as defined in claim 2 wherein said indicator plate member is provided with an arcuate notch in the lower end edges thereof, said notch being defined by end walls for engaging opposite surfaces of the plate at the lower end of the slot thereby limiting the pivotal movement of the indicator plate member.

4. The structure as defined in claim 3 wherein said indicator plat-e member is provided with a U-shaped weight engaging the lower end thereof and supported from the support for the indicator plate member.

5. For use in combination with a tool and work, a device for indicating the position of the tool relative to the center line of the work, said device comprising an elongated plate received between the tool' and the work whereby application of force on the plate by the tool wiil orientate the plate in perpendicular relation to the line of opposing contacts between the tool and the work, said plate having parallel surfaces, an indicator plate member pivotally mounted on said plate for pivotal movement about an axis parallel to the parallel surfaces of the plate, said indicator plate member being disposed in perpendicular relation to the plate and including an arcuate end edge disposed adjacent the plate, said arcuate end edge including a graduated scale for indicating the angular position of the indicator plate member in relation to the plate, said plate member including weight means connected thereto for maintainingthe longitudinal axis of the plate member vertical whereby angular inclination of the plate may be determined by observing the relationship of the graduated scale on the plate member to the surfaces of the plate.

6. The structure as defined in' claim 5 wherein said plate member isprovided with a notch inthe lower edge thereof receiving a portion of the plate therein whereby the end edges of the notch will contact opposite surfaces of the plate for limiting the pivotal movement of the plate member inrelation to the plate.

References Cited in the file of this patent UNITED STATES PATENTS 371,294 wOOdS Oct'. 11, 1387 773,756 M11161 DEC. 27, 1904 2,542,938 Morris Feb. 20, 1951 2,580,601 Rouse Jan. 1, 1952 2,609,616 Mueller Sept. 9, 1952 2,567,703 Zumkeller Feb. 2, 1954

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