US1393989A - Indent hardness-gage - Google Patents

Description

C. M. ZUBLER.

INDENT HARDNESS GAGE.

APPLICATION FILED MAR. I5. I92I.

Patented Oct. 18, 1921..

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INVENTOR J" ATTORNEYS UNITED STATES CAMP M. ZUBLER, OF PHILADELPHIA, PENNSYLVANIA,

JOHN J. DAVIES, JR,

ASSIGNOR OF ONE-HALF TO 0]? PHILADELPHIA, PENNSYLVANIA.

IN DEN '1 HARDNESS-GAGE.

To all whom it may concern Be it known that I, CAMP M. ZonLnn, a citizen of the United States, residing in the city and county of Philadelphia, State of ennsylvania, have invented a new and useful Indent Hardness-Gage, of which the following is a specification.

My invention consists of a novel construction of an indent hardness gage, which is designed to determine the relative hardnessof steel or other metals or the comparative hardness between steel or other metals of the same class, grade or composition, my novel gage being especially adapted for testing different sections of one or more bars of steel or steel in sheet form or other metals or ma terials, or to compare one section of one bar with another.

To the above ends, my invention consists of a novel construction of a portable frame or body, having an adjusting screw mounted in one portion thereof and a spring-actuated ball-pointed plunger mounted in another portion thereof and in alinement with said screw and adapted to be locked in its upward position with said spring compressed, means being provided for unlocking said plunger and permitting the tension of said spring to propel said plunger forwardly so that the ball-pointed end of the same will indent the material to be tested.

ther novel features of advantage and novelty will be hereinafter fully described and pointed out in the claims.

For the purpose of illustrating my invention, I have shown in the accompanying drawings forms thereof which are at present preferred by me, since they will give in practice satisfactory and reliable results, although it is to be understood that the various instrumentalities of which my invention consists can be variously arranged and organized and that my invention is not limited to the precise arrangement and organization of these instrumentalities as herein shown and described.

Figure 1 represents a side elevation of an indent hardness gage embodying my invention, certain ortions thereof being shown in section and the plunger being shown in elevated position.

Fig. 2 represents a view similar to Fig. 1, but showing the plunger in its lowest posi- Specification of Letters Patent. Application filed March 15, 1921.

Patented Oct. 18, 1921. Serial No. 452,423.

tion in the be tested.

Fig. 3 represents a the plunger rod being line 33, Fig. 1.

Figs. 4 and 5 represent vertical sectional views, partly in elevation, through the upper portion of the plunger chamber. tie relative position of the locking device act of indenting the material to plan view of Fig. 1, shown in section on latter is in its extreme positions.

Similar numerals of reference indicate corresponding parts.

Referring to the drawings 1 designates my novel construction of indent hardness gage, the same comprising the main frame or body 2 which is and may be made of a forging, casting or the like, of any desired contour, and provided with the alining upper and lower portions or heads 3 and 4 respectively. The lower head 4 is bored and threaded to receive the adjusting screw 5, which is provided with a knurled head 6, or the like, whereb said screw can be readily manipulated or rotated. The upper or alining head 3 of the frame is bored and reamed to form the chamber 7 in which is located the plunger 8 having the pendant ball-pointed or indenting end 9, and the upwardly extending plunger rod 10, whose upper end passes through the upper closure or collar 11, which is held in the upper portion of the plunger chamber 7 by means of the screw or other fastening device 12.

13 designates a coiled spring or other similar tension device, whose lower end rests upon the top of the plunger 8, and whose upper end contacts with the bottom of the collar 11. The rod 10 is provided at its upper portion with 'the shoulder 14 and upper end the knob 15,

tion seen in Fig. 2 to the position seen in Fig. 1, in which latter position the catch 16 snaps under the shoulder 14 by reason of the tension of the spring 17, or its equivalent.

he shoulder 14 on the rod 10, is preferably formed by making a portion of said rod conical, but it may be formed by other means.

It will be apparent, that any suitable form of catch or like. fastening device 16 may be termined, is placed employed to hold the plunger 8 temporarily in its elevated position seen in Fig. 1, and while I have in the present instance shown said catch 16 as of angular construction and composed of the horizontal member 16, the vertical member 18 and the horizontal member 19 fulcrumed at the point 20 and provided with the thumb piece 21, which is adapted to contact with the stop or pin 22, it will be apparent that other forms of catches or looking devices may be employed without departing from the spirit of my invention.

The ball-pointed or indenting end 9 of the plunger 8 is adapted to pass through or into the alining opening 23 in the bottom of the lunger chamber 7 when in the act of mak- 1ng an indentation upon the sheet 26 or the material to be tested, said sheet being clamped against the face 25, by the adjusting screw 5.

While I have shown the frame, yoke 2 as being of curved contour, be apparent that the shape of the same may be changed and I preferably locate upon said frame the gage plate 24, which has thereon concavities of varying dimensions or depth, which may have suitable insignia in proximity thereto such aS H, hard, 2 one half hard; 9; one quarter hard, and S, soft, which are adapted to be compared with the indentation made on the material 26 to be tested.

The operation is as follows 1- The sheet of steel or other material 26, whose relative harness is to be tested, or deagainst the face 25 and locked or clamped in the position shown in Fig. 1, by means of the adjusting screw 5. The operator then pulls upwardly upon the knob 15, whereupon the parts move from the position seen in Figs. 2 and 5 into the position seen in Fig. 1, in which latter position, the catch 16 snaps under the shoulder 14:, by reason of the action of the flat spring 17 or its equivalent, said catch 16 now appearing as seen in Figs. 1, 3 and 4. The operator next presses with his thumb upon the thumb piece 21, so that the latter moves toward the pin 22, whereupon the catch 16 is disengaged or unlocked from the shoulder 14. The tension of spring 13 now drives plunger and its ball-pointed end downwardly from the position seen in Fig. 1, into the position seen in Fig. 2, said ball-pointed or indenting end passing through the opening 23 and making an indentation in the sheet of metal 26. The

adjusting screw 5 is then loosened, the sheet body or y of material removed from the face 25, and

the relative size or character of the indentation, which will be larger or smaller according to the softness or hardness of the material, can then be compared with the scale 24 or can be measured with a thin transparentcelluloid scale on which is stamped two tapering V-shaped lines, one line of which has it will standard or pre-determined hardness ma ks placed at right angles, denoting H, hard one-half hard, 1 one-quarter hard, and S, soft or if desired other insignia may be placed on the celluloid.

\Vhile I have shown my novel gage, as equipped with a steel helical spring 13, it will be apparent that any other equivalent tension device may be employed, its function being to drive or force the ball-pointed end 9 into the material to be, tested, so as to indent the same without the use of a hammer or a weight or by compression, as with cams or levers, it being apparent that my novel gage is not intended to ascertain what would be known as a standard hardness for all metals, but to test one or more sections of steel in sheet form or other metals or to compare one section or one bar with another.

It will now be apparent that I have devised a novel and useful indent hardness gage, which embodies the features of advantage enumerated as desirable in the statement of the invention-and the above description, and while I have, in the present instance, shown and described a preferred embodiment thereof which will give in practice satisfactory and reliable results, it is to be understood that such embodiment is susceptible of modification in various articulars without departing from the spirit or scope of the invention or sacrificing any of its advantages.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is

1. In a device of the character stated, a body, a threaded adjusting screw mounted therein, a plunger chamber formed on said body in alinement with said screw, a plunger in said chamber having a ball-pointed end, adapted to pass throuh an opening in the bottom of said plunger chamber, a rod for said plunger, an upper closure for said chamber through which said rod passes, a spring intermediate said closure and plunger, a shoulder on said plunger rod, and a locking device adapted to coact with said shoulder, and temporarily retain said plunger in its raised position with said spring compressed.

2. In a device of the character stated, a body having alining heads, a threaded adjusting screw mounted in one of said heads, a plunger chamber formed in the other of said heads, a plunger in said chamber having a pendant mdenting end, a collar closing the top of said plunger chamber, a spring interposed between said plunger and collar, means for locking said plunger in elevated position with said spring compressed, and means for unlockin said plunger.

3. In a device 0 the character stated, a body having alining heads, a threaded adjusting screw mounted in one of said heads,

a plunger chamber formed in the-other of said heads, a plunger in said chamber having a pendant ball pointed'end, adapted to pass through an opening in the bottom of said plunger, a collar, a spring, between said plunger and said collar, means for locking said plunger in elevated position, and means for unlocking said plunger, said lockin means comprising a, spring-pressed catcl pivotally mounted on said frame, a thumb piece for said catch, and means for arresting the extent of movement of said catch.

In a device of the character stated, a body having alining heads, a threaded adjusting screw mounted in one of said heads,

a plunger chamber having an opening in its bottom, a plunger in said chamber having a ball-pointed end adapted to pass through said opening, a closure for the top of said chamber, a rod for said plunger passing through said closure, a shoulder in said rod, a laterally movable spring pressed catch pivotally mounted on said body, and provided with a finger piece and a stop on said body for arresting the movement of said finger piece.

CAMP M. ZUBLER. Witnesses E. HAYWARD FAIRBANKS, JOHN J. DAVIES, Jr.

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