US2577334A - Micrometer scribing tool - Google Patents

Description

Dec 4, 1951 w. KozLowsKl MICROMETER scRIBING TOOL.

2 SHEETS-SHEET -l Filed June 2, 1948 CIJ-alter Kozlowski {Srzvenbor Dec- 4, 1951 w. KozLowsKl MICROMETER SCRIBING TOOL Filed June 2, 1948 2 sHEETs-fsHEET 2 Savant-,or

Clt/borne f Zier' Kozlowski Patented Dec. 4, 1951 UNITED srArss PATENT `olf-'Fleer'.

Walter Kozlowski, Irvington, N. J., assignor of one-half to Peter J. Gaylor, Newark.. N.A I..

Application June-2, 194s; seriarNo. sacar 2 claims. (c1. as-i'sa);y

This invention deals` with a micrometer scribing tool and, more specifically, to a combination micrometer scribing tool adapted for flat or round edge surfaces, and capable of being used as a depth gage, andthe like.

The invention will be more `readily understood from the drawings in which Fig. 1 shows a front View of the complete' tool, Fig. 2 a partial side View and Fig. 3 a partial. back View. In Fig. 4 areshown details assideviewso. the reading cylinder units and the. scriber. rod cylinder.. Detailed side viewsl of the scriber rod units and spacer are illustrated in. Fig. 5, while Fig. 6 showsy a. side View and front view, respectively, of the. scriber.; Side views oi the calibrated cylinder elementsY are. depicted in. Fig. 7, while Fig. 8v shows a back view andFig; 9` aside view of the adapter for. round edges. Across sectional top view of the body blockis. shown in Fig. 10, the end View being shown. in Fig. 11- Similar numerals refer to similar parts in the various guresa Referring again to the drawings, numeral I represents a'block, the forward or front face 62 of whichisground nat` to act as a support for the tool during measuring. Pressed into opening of block I as a tight fit is end 9 (Fig. 7) of cylinder 8 which has interior threaded portion I2 on one end and a thin shell on the other. On cylinder 8 is mounted collar I0 Which rests against block and pressed over cylinder 8 is tightly tting calibrated cylinder I, the inner bore I4 of which lts snugly against cylinder 8. The outer `surface of cylinder I I is provided with calibrations I3 which specify, accurately, the amount of protrusion of face 4I of scriber 43 past face 62 of block I. Hole 66 is provided for inserting a circular wrench to turn cylinder on 8 for adjustments when face 4| of scriber 43 is worn. End bushing I5 with inner threads I6 is screwed on the outer threads on the end of cylinder 8, by inserting a circular wrench in hole 65, thus keeping calibrated cylinder firmly on cylinder 8. Inner threads I2 are preferably spaced 40 to the inch, while the outer ones may be 60 to the inch.

Hollow scriber rod spindle 24 (Fig. 4) fits into and rides in cylinder 8 by engaging threads 26 with inner threads I2. Fitting over end 29 of scriber rod spindle 24 is hollow Vernier reading cylinder I'I, the inner surface I8 of which just barely clears collar 21 separating threaded portions 26 and 28 on spindle 24. Threaded end 28 of spindle 24 projects through narrow opening I9 on Vernier cylinder I'I, enabling screwing thereon of hollow bushing 272 by'meanslofthreads 231, serving asalock for Vernier cylinder IY'I-v which has VernierI calibrations 20 around itslfree peripheral edge; and knurled portion 2| for facilitating turning'of the-cylinder;

End 29- of spindle Z4; isundercut tot counterboreV 3-'I of spacer 34 (Fig 5). scriber rod 32| on whichy rides` scriber 43 (which is. k-ept from leaving the end of rod 3ft by collar 32), ts intoi scriber rod spindle 24. Threaded end3'31of. rod 3| projects through cylinder I'I and bushing 22. 0n. end- 33 are mounted spacers 34 which. may be exactly l long and which are counterbored at 3l and undercut at 3:5, the latter. to. fit an. adejacent counterbore in' a. spacer or counterbore?I 39 of lock nut 38", the inner threads 480i which en.- gage threaded endl 33' of scriber rodl 35|., thereby keeping tight thev whole scriber rod assembly. The spacers 35, serve to lengthen. measured portion 24 (Fig. 1) of. scriber rod4 spindle 24; when they are: transferred from position 35 in Fig. 1'. Thisis. done by unscrewing lock nut, 38, removing spacer 35',- slippingV out. scriber 43 and rod 3| andinserting on; rnd 3 I. thespacer. 35'.

End 2.5 of spindle-2.4 (Figui)v isundercutitda-lflow fitting therein of end 44 of scriber 43 (Fig. 6). Scriber 43 (Fig. 6) is provided with wheel portion or face 4| in the edge of which ar-e cut teeth 42 used for the scribing operation.

Steel scriber block I has side holes 6|) `and 6|, threaded at their free ends to engage threads on adjusting screw 3 and lock screw 2, respectively. Brass thrust plugs 6 and I are provided to seat against scriber rod spindle 24 and thus enable locking of the spindle at any setting.

When the tool is used for accurate scribing on a fiat surface, knurled end 2| of cylinder I'I is turned, which in turn propels scriber rod spindle 24 holding scriber rod 3| from the end of which projects scriber 43 with scribing teeth 42. When the desired projecting distance is obtained (as read from scale I3 and Vernier 2G), spindle 24 is locked in the cylinders by tightening lock screw 2. The tool may be then used for scribing, employing face 62 of block as the guide.

If a round edged surface is to be scribed, center head 45 is mounted on head and fastened thereon by means of lock screws 55. Then, cylinder I'I is turned until scriber face 4| just touches the edge of the surface to be scribed (the surface being inserted in the angle made by sides 48 and 49 of members 4B and 41). The reading is taken on scale I3 and spindle 24 is then screwed out forwardly until the desired distanc-e within the surface to be scribed is reached (as read from 3 scale I3). Thereafter, the spindle 24 is locked by screw 2 and scribing is done as heretofore outlined. The scriber 43 may be substituted by a pin to act as a depth gage.

The tool of the present invention has many advantages over those now on the market. For example, it may be used efficiently for straight or circular surfaces. Also, if the surface to be scribed, or adjacent surfaces, have ridges or recesses, these will not interfere with the scribing operation, since guiding is done at the edge and the scriber projects from spindle 24 which then may straddle protuberances, ridges, etc. and also allow scribing edge 42 to sink into ridges without interfering with the scribing. f A

It has been found desirable to allow collar l (Fig. 7) to stand on cylinder 8 far enough away.

from the rear face of block l to enable collared lip l 5l on adapter 45 to rest against it (as in Fig. 1) and thus act as a positioer for lip 5l when surface 5D rests tightly on face 62 of block l. The forward end of sleeve or cylinder Il butts up against collar I0 (Fig. 7). Numeral 4 represents a chamfered opening in the front or guiding face of base l into which scriber 43 recedes when it is screwed back as far as possible. Numeral 52 represents the cut-away portion at the bottom of the V of the center head 45 through which the scriber emerges, while nruneral 54 represents the threaded hole in which screws 55 are inserted.

I claim:

1. In a micrometer scribing tool employing a block having a flat forward guiding surface, a central opening through said block perpendicular to said guiding surface, a hollow cylinder tted at one end into an end of said opening opposite said guiding surface, and having internal threads, a calibrated cylinder mounted on said cylinder so as to ride therewith, a hollow scriber rod spindle having external threads riding on the internal threads of the hollow cylinder, a scriber rod fastened inside said scriber rod spindle and riding therewith, the forward end of which projects through said block and on which is attached the scriber, and a Vernier reading cylinder mounted over said calibrated cylinder and fastened to the rearward end of said spindle so as to ride therewith, said Vernier cylinder being turned to propel said scriber, said tool also employing a V- shaped center head for use on circular edges, the V being made of forwardly projecting prongs, apart, the improvement comprising a collared mounting on the bottom of the V of the center head, for central positioning on said block so that the scriber projects from the bottom of the V between the two prongs thereof, engaging means on said mounting for engaging said center head on said block in removable relation thereto, and said scriber having a circular scribing edge disposed completely around the scriber rod spindle.

2. A micrometer scribing tool according to claim 1 in which at least one side of the block carries a thrust plug, and at least one lock screw to impose thrust on a thrust plug so as to lock said spindle in set position.

WALTER KozLowsKI.

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

UNITED STATES PATENTS Number Name Date 187,112 Farciot Feb. 6, 1877 291,728 Hester Jan. 8, 1884 477,183 McLane June 14, 1892 986,783 Tschop Mar. 14, 1911 1,262,434 Beeck Apr. 9, 1918 1,325,631 Fields Dec. 23, 1919 1,504,683 Fusco Aug. 12, 1924 1,573,347 Labasse Feb. 16, 1926 1,971,628 Sutterlin Aug. 28, 1934 2,335,513 Hewitt Nov. 30, 1943 FOREIGN PATENTS Number Country Date 6,055 Great Britain Mar. 16, 1903 244,219 Great Britain Dec. 17, 1925 770,759 France Sept. 20, 1934

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