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Publication numberUS2348878 A
Publication typeGrant
Publication dateMay 16, 1944
Filing dateApr 23, 1943
Priority dateApr 23, 1943
Publication numberUS 2348878 A, US 2348878A, US-A-2348878, US2348878 A, US2348878A
InventorsBehen George L
Original AssigneeRalph Ashton
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Center locating device
US 2348878 A
Abstract  available in
Images(3)
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Claims  available in
Description  (OCR text may contain errors)

May 16, 1944.

G. L. BEHEN CENTERLOGATING DEVICE Filed A ril 23, 1943 3 Sheets-Sheet 1 lmzengfor 72 80738 L. ,Bekew WW l m May 16, 1944.

G. L. BE4HEN 2,348,878

CENTER LOCATING DEVICE Filed April 23, 1943 3 Shee'ts-Sheet 2 Inventor eafje Z. Be kev; By flzwaaisfizfi M WW tarlzeys,

G. L. BEHEN 2,348,878

CENTER LOCATING DEVICE Filed April 23, 1943 3 Sheets-Sheet 3 /I I I WWW Patented May 16, 1944 CENTER LOCATIN G DEVICE George L. Behen, Arvada, 0010., assignor of onehalf to Ralph Ashton, Arvada, 0010.

Application April 23, 1943, Serial No. 484,265

1 Claim.

This invention relates to new and useful improvements in devices for locating the centers of shafts and other structures, the principal object of the present invention bein to provide a device of this character which can be utilized in ascertaining the centers of shafts of any cross sectional shape.

Another important object of the invention is to provide a device of this character which is especially adapted for use on stock to be used in turning lathes.

Still another important object of the invention is to provide a center locating device which is not only accurate, but capable of being used quickly and handily with practically no chance of erring'.

Other objects and advantages of the invention will become apparent to the reader Of the following description.

In the drawings:

Figure 1 represents a top plan view of the instrument.

Figure 2 is a bottom plan view of the instrument.

Figure 3 is an end elevational view of the instrument.

Fi ure 4 is a side elevational view.

Figure 5 is a fragmentary detailed sectional view taken substantially on the line 5--5 of Figure 1 and showing an ofiset scriber in use.

Figure 6 is a fragmentary detailed sectional view taken on the line 66 of Figure 1.

Figure 7 is a fragmentary detailed sectional view showing a center punch which is used alternately with the scriber shown in Figure 5.

Figure 8 is a fragmentary top plan view showing the guide tongue on one of the complementary angles.

Referring to the drawings wherein like numerals designate like parts, it can be seen that the instrument is composed of a pair of right angle square members 5, 6 each having a pair of arms disposed at a ninety degree angle relative to each other, and the arms of these square members cross as clearly shown in both Figures 1 and 2.

As is shown in Figures 3 and 4, the arms of the square members 5, 6 are slotted longitudinally as at I, thus defining fingers 8 which interlap at the points of crossing of the arms of the square members. Further, the fingers are longie tudinall slotted as at 9 and Where the slots}! of the fingers of the arms of one square member cross the slots 9 of the fingers of the arms of the complementary square member, a bolt 10 is disposed therethrough and also through a washer II which bears against a connector bar l2, the bolt Iii passing through a slot l3 which extends longitudinally of the connector bar l2.

Suitable graduations or other micromic reading I4 is provided along one or both arms of the square members.

An elongated beam I5 is fixed to and projects at 45 degrees from the juncture of the arms of the square member 5, across the juncture of the arms of the square member 6 and for some distance therebeyond. This beam 15 has a longitudinal slot l6 therein for receiving a guide tongue I! which is fixed to and projects beyond the juncture of the arms of square member 6. A set screw I8 having a knurled head is disposed through a cap plate !9 and through the slot I 6 and into the tongue ll.

Either an ofiset scriber 20 can be employed in a holder generally referred to by numeral 2|, or a center punch 22 may be employed.

The holder consists of a body 23 having a vertical bore therethrough, this body 23 having a depending boss 24 disposed through both the slots l3 and it of the beam 15 and bar I2. The offset scriber 20 has a head 25 and a reduced intermediate portion 26 against which is disposed a set screw 21 which forms part of the holder.

The center punch 22 has a reduced intermediate portion 28 which can be engaged by the aforementioned set screw 2'! when this center punch 22 is used instead of the offset scriber 20.

It can now be seen, that when the two square members 5, B are forced together or pulled apart, there will be a differentiation of movement of the bar l2 which is regulated by the action of the bolts I0, reacting in response to the action of the square members 5, 6 which, of course, always places the holder 2| in the exact center of the square area defined by the two square members 5, 6.

While the foregoing specification sets forth the invention in specific terms, it is to be understood that numerous changes in the shape, size and materials may be resorted to without departing from the spirit and scope of the invention as claimed hereinafter.

Having described the invention, what is claimed as new is:

A center locating device comprising a pair of right angle square members each having a pair of arms disposed at a degree angle relative to each other, the arms of said square members being slotted longitudinally to define a plurality of fingers for each arm, said fingers interlapping at the points of crossing of the arms and the of said square members, said beam having a longitudinally elongated slot receiving said guide tongue, a cap plate secured over the beam and to said guide tongue, and a marker including a body disposed on the connector bar and having a boss disposed through the slots of the connector bar and the beam, said body and, boss having an axial bore, and a marking element longitudinally adjustable in said bore and projecting from the 10 boss.

GEORGE L. BEHEN.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2451720 *Jun 7, 1946Oct 19, 1948Davis Thomas JCentering device
US4352247 *Apr 24, 1980Oct 5, 1982Rohde Norbert JosefSquare level for drawing angles and parallels
US5394617 *Aug 12, 1993Mar 7, 1995Tucker; Bernard W.Eyewear lens mechanical center locating apparatus
US7082694 *Jan 3, 2006Aug 1, 2006Lyman Jr Hugh MarionCenter point locator device
US20060130348 *Jan 3, 2006Jun 22, 2006Lyman Hugh M JrCenter point locator device
EP0018657A1 *May 3, 1980Nov 12, 1980Norbert-Josef RohdeSet-square for dividing angles and tracing parallels
Classifications
U.S. Classification33/672
International ClassificationB25H7/00
Cooperative ClassificationB25H7/00
European ClassificationB25H7/00