US2735190A

US2735190A - Pipe marking device

Info

Publication number: US2735190A
Authority: US
Publication date: 1956-02-21
Anticipated expiration: 1973-02-21

Description

Feb. 21, 1956 Filed July 51, 1955 w. w. JORDAN ET AL 2,735,190

INVENTOR. Dl-l/LL/P W. SPENCE WOODQOW Ml. JORDA/V 7197mm )dmzaoz v 0mm 1956 w. w. JORDAN ET AL PIPE MARKING DEVICE 2 Sheets-Sheet 2 Filed July 31, 1953 a A mm mm W P 0 J1 m MW WW 0V. M W

ATTa/e/VEYJ United States Patent PIPE MARKING DEVICE Woodrow W. Jordan, Louisa, and Phillip W. Spencer, Greenup, Ky.; said Jordan assignor to Lewis McCubbin, Greenup, Ky.

Application July 31, 1953, Serial No. 371,474

2 Claims. (Cl. 33-189) This invention relates to an improved pipe or rod marking device of the type employing an arrangement of bubble levels, a scale or protractor, and punch marking means, and the primary object of the invention is to provide a device of this kind which is more serviceable and versatile in the number and variety of operations it is capable of performing, is capable of being used with greater ease and speed, is more accurate in use, and which is composed of a minimum number of rugged parts in an arrangementrsuch that the device can be constructed in a mechanically superior and attractive form at relatively low cost.

Other important objects and advantageous features of the invention will be apparent from the following description and the accompanying drawings, wherein, for purposes of illustration only, a specific embodiment of the invention is set forth in detail.

In the drawings:

Figure l is a front elevation.

Figure 2 is an enlarged top plan view.

Figure 3 is a transverse vertical section taken on the line 33 of Figure 1.

Figure 4 is an enlarged horizontal section taken on the line 4-4 of Figure 1.

Figure 5 is a front elevation showing the device applied for marking a pipe.

Figure 6 is a rear elevation of Figure 1.

Referring in detail to the drawings, wherein like numerals designate like parts throughout the several views, the numeral 7 generally designates the illustrated pipe or rod marking device, and the numeral 8 designates a pipe to which the device is shown applied.

The device 7 comprises a preferably one-piece body, of suitable material, such as steel, consisting of an annulus 9 having a rear side 10 in which is formed an annular groove 11, at the radially inward edge 12 of the annulus, in which is rotatably confined a circular disc scale or protractor plate 13. The protractor plate 13 is held in place in the groove 11 by the flanges 14 of studs 15 whch are threaded into the rear side 10 of the annulus 9, is particularly well shown in Figure 4.

The body of the device further comprises a pair of similar substantially isosceles

triangular legs

16, 16 which extend radially from the lower side or edge 17 of the annulus 9, and are in the form of plates thinner than the annulus 9 and set forward from the rear side 10 of the annulus 9 and fiush with the front side 18 of the annulus 9. As shown in Figure 6, the leg plates 16 may be reinforced along their edges by connected, inwardly extending edge flanges 16'.

The protractor plate 13 has a circular center opening 19, and four

bubble levels

20, 21, 23 and 24 are secured to the front side of the protractor plate 13 at intervals of 90 apart, and at right angles to each other. A protractor scale 25 is formed on or secured to the front of the protractor plate 13 concentrically with respect to the bubble levels and is divided into two 90 segments extending in opposite directions from a zero point 26 R 2,735,190 Patented Feb. 21, 1956 which is located on a diameter of the protractor plate 13 and in line With the intersection 27 of the similarly angulated pipe engaging surfaces 28 of the

legs

16, 16. The ends 29 of the scale segments are on a diameter of the protractor plate 13 at right angles to the first mentioned diameter and on a line with the mid points of the

bubble levels

23 and 24, just as the mid points of the

bubble levels

20 and 21 are aligned with the first mentioned diameter.

In line with the zero point of the scale 25 there project from the rear surface 18 of the annulus 9, upper and lower, preferably integral punch guides or

brackets

30 and 31, respectively, which are in the form of lateral lugs located above and below the protractor plate 13, having

circular openings

32 and 33, respectively, through which is slidably engaged a preferably uniformly cylindrical punch rod or shaft 34.

The punch shaft 34 has on its upper end an enlarged cup-shaped head 35 which is secured removably in place by a transverse pin 36 extending through the shaft 34. Between the head 35 and the upper side of the upper bracket 30 is compressed an upper helical spring 37 which is strong enough to normally retract the punch shaft 34 upwardly to the intermediate position shown in Figures 1 and 3. The shaft 34 normally extends below the lower bracket 31 to the point shown in Figures 1 and 3 and has on its lower end a preferably integral and enlarged conical centering and marking point 38. A lower helical spring 39 is circumposed on the shaft 34 and compressed between the under side of the lower bracket 31 and the marking point 38 and serves to depress the shaft to a normal intermediate level against the tension of the upper spring 37 and the weight of the shaft 34, the springs being proportioned in strength to balance the shaft 34 yieldably on its normal or starting position and resist movement of the shaft 34 upwardly from such position and to maintain the marking point 38 engaged with the work.

It will be observed that the forward projection of the annulus 9 beyond the protractor plate 13, the scale 25, and the

bubble levels

20, 21 and 23, 24 protects these parts from injurious contact with objects during use and storage of the device.

As shown in Figure 5, the device is adapted to be applied to a pipe or rod 8 with the inner divergent surfaces 28 of the

legs

16, 16 applied to the pipe, with the marking point 38 in a resultant tensioned engagement with the side of the pipe. In a quartering operation, the point 38 is first set at an original or starting point of the circumference of the pipe 8 and then the device is rotated relative to the pipe until the fixed reference point 40 on the front face 18 of the annulus 9 in line with the punch shaft 34 and

bubble levels

20 and 21 is in line with the 45 mark on the scale 25, the bubbles in the

levels

20 and 21 being kept centered. A blow on the punch head 35 with a mallet or hammer then causes the marking point 38 to make a mark on the pipe 8 exactly at 45 from the original or starting point. The presence of the

bubble levels

23 and 24 in conjunction with the

bubble levels

20 and 21 enable a variety of starting settings and subsequent accurate quarterings in difierent positions of the device with unusual ease, speed, and facility.

What is claimed is:

1. In a pipe marking device, a body comprising an annulus having a periphery and front and back sides and a radially inward surface, a pair of legs projecting radially from the periphery of the annulus and having convergent pipe engaging surfaces meeting in an intersection at the periphery of the annulus, the said radially inward surface of the annulus at the back side of the annulus being provided with an annular groove, a protractor disc having a peripheral edge rotatably seated in said groove, means holding the protractor disc in place, a lower bracket projec'ting rearwardly from the back side of the annulus in alignment with said intersection, an upper bracket projecting rearwardly from the backside of the annulus and with said lower bracket aligned with a diameter of the annulus, a punch shaft slidably engaged through said brackets, a striking head on the upper end of the shaft and a marking point on the lower end of the shaft and positioned between said legs below said intersection, a protractor scale on the front side of the protractor disc remote from the punch shaft, said scale having a central zero point, a fixed reference point on the front side of the annulus in line with said diameter, and bubble level means fixed on the front of the protractor disc in line with said zero point, said annulus projecting forwardly from and protectively with respect to said protractor disc, said scale and said bubble level means.

2. In a pipe marking device, a body comprising an annulus, pipe engaging legs projecting radially from the annulus, said legs having divergent pipe engaging surfaces, said annulus having a front side and a rear side, said rear side being provided with an annular groove, a rotatable protractor disc engaged in said groove, means retaining the disc in place, said disc having a front side having thereon a concentric protractor scale including a zero point, a fixed reference point on said annulus, diametrically opposed punch guides on and projecting rearwardly beyond the rear side of said annulus, a spring positioned punch shaft engaged through said punch guides, and diametrically opposed pairs of parallel bubble levels mounted on said disc, adjacent ones of said bubble levels being spaced at substantial distances from each other circumferentially of the disc.

References Cited in the file of this patent UNITED STATES PATENTS 657,443 Newton Sept. 4, 1900 742,077 Solelius Oct. 20, 1903 948,523 Perkins Feb. 8, 1910 1,134,297 Tillery Apr. 6, 1915 1,927,504 Rudolff Sept. 19, 1933 2,113,524 Wolfe Apr. 5, 1938 2,569,349 Smith Sept. 25, 19.51 2,611,971 Rabatine Sept. 30, 1952 FOREIGN PATENTS 816,184 Germany Oct. 8, 1951