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US 3,934,463 AGranted
Hardness tester
OwnerAdrian Dean Venderjagtinventor
Life of this patent
Estimating the term…
Abstract
Hardness testing apparatus including a workpiece penetrator, a stop for interrupting movement of the penetrator after it has penetrated the workpiece to a predetermined depth, and mechanism for individually measuring the load on the penetrator when it has penetrated the workpiece to the predetermined depth.
Claims19
Hardness testing apparatus comprising:
- workpiece penetrating means for penetrating a workpiece to be tested;
- means mounting said workpiece and said penetrating means for relative movement between spread positions and engaged positions in which said penetrating means penetrates said workpiece;
- load bearing stop means engageable with said workpiece for positively physically interrupting said relative movement of said penetrating means and said workpiece after said penetrating means has penetrated said workpiece to a predetermined depth by transmitting any additional force which tends to move said workpiece and penetrating means together directly to said workpiece via said stop means;
- and
- means for determining the load exerted on said penetrating means by said workpiece independently of any load exerted by said workpiece on said stop means when said penetrating means is at said pedetermined depth.
2 more elements
Hardness testing apparatus comprising:
- workpiece penetrating means for penetrating a workpiece to be tested;
- means for relatively moving a workpiece and said penetrating means between spread positions and engaged positions, in which said penetrating means penetrates said workpiece;
- stop means engageable with said workpiece for positively interrupting said relative movement after said penetrating means has penetrated said workpiece to a predetermine depth;
- means for determining the load exerted on the penetrating means when said penetrating means is at said predetermined depth;
- and
- additional means for individually determining the load exerted on said stop means when said penetrating means is at said predetermined depth;
- said means for relatively moving said workpiece and said workpiece penetrating means operating in response to a predetermined load being exerted on said first mentioned load determining means and a predetermined load exerted on said additional load determining means.
4 more elements
Hardness testing apparatus comprising:
- workpiece penetrating means for penetrating a workpiece to be tested;
- means for relatively moving a workpiece and said penetrating means between spread positions and engaged positions in which said penetrating means penetrates said workpiece;
- stop means engageable with said workpiece for positively interrupting said relative movement after said penetrating means has penetrated said workpiece to a predetermined depth;
- and
- means for determining the load exerted on the penetrating means when said penetrating means is at said predetermined depth;
- said stop means mounting said penetrating means for movement therewith and for limited, free, reciprocal movement relative thereto, said penetrating means being movable relative to said stop means between an outwardly projecting position uncoupled from said load determining means and a less projecting position in which said penetrating means is coupled to said load determining means.
3 more elements
Hardness testing apparatus comprising:
- workpiece penetrating means for penetrating a workpiece to be tested;
- means for relatively moving a workpiece and said penetrating means between spread positions and engaged positions in which said penetrating means penetrates said workpiece;
- load bearing stop means engageable with said workpiece and physically reactible between said workpiece and a portion of said penetrating means for positively physically interrupting said relative movement after said penetrating means has penetrated said workpiece to a pre-determined depth;
- and
- means for determining the load exerted on said penetrating means by said workpiece independently of any load exerted by said workpiece on said stop means when said penetrating means is at said predetermined depth.
2 more elements
Dependencies are inferred from the claim text.