Class 73/796 - Tension-compression

Subclass of Class 73 - Measuring and testing
Definition: Subject matter where the load applied may be either a push
No. of patents: 33
Last issue date: 07/20/2010

Number	Title	Issue Date
7757564	Material testing machine The present invention includes: a pair of columnar members 12 disposed on both sides of a specimen piece SP; a crosshead 15, bridging the pair of columnar members 12, that applies a load to the specimen piece SP by moving in a direction of a lon...	07/20/2010
7441465	Measurement of properties of thin specimens based on experimentally acquired force-displacement data A method and system are provided for obtaining force-displacement responses for a specimen or sample of material. The sample is supported with a spanning portion spanning in an environment between at least three points not in a line, wherein the points are fixed rel...	10/28/2008
7409869	Resistance test method A method for evaluating thermal fatigue resistance for a welding consumable alloy can include the following steps: placing a test specimen of a welding consumable alloy in a testing device such that a tensile load and a compressive load can be introduced to the test...	08/12/2008
7340961	Fixture and method for measuring elongation A fixture for measuring the elongation of a specimen includes a base. The base carries a fixture portion, and the fixture portion is provided with a surface adapted to receive a portion of the specimen. ...	03/11/2008
7284444	Hermetically sealed displacement sensor apparatus A hermetically sealed displacement sensor has strain gauges placed on thin flexible triangular shaped beams of a load beam cell. The strain gauges are enclosed in a hermetically sealed cavity which cavity is sealed by means of a cover plate placed over the load beam...	10/23/2007
7038592	Method and device for detecting physical bottom contact for objects on a sea bottom A method and a device for detection of physical or approximately physical bottom contact for objects, for instance fishing tackles, which are dragged closely above or on a sea bottom, said method consisting of sensoring an alteration of a force acting on a tension s...	05/02/2006
7000484	Load beam apparatus operative to prevent improper operation due to off axis loads A beam transducer employs a linear bearing which surrounds the active element of the transducer which is the beam. One end of the bearing is welded to the inactive end of the load beam. The other end of the bearing is not welded, allowing the active end of the beam ...	02/21/2006
6938492	Pressure sensor and manufacturing method of pressure sensor A bonding pad for outputting an output of a piezoresistive element to an integrated circuit is disposed on one side of a sensor substrate, and the sensor substrate is adhered to a package at only a rear side of the bonding pad. ...	09/06/2005
6925890	Anchor chain load measurement arrangement Anchor chain load measurement arrangement for measuring the reactive load in structures which support an anchor chain. In one arrangement, standard resistance compression load cells are mounted directly in the load path between a chain retainer and a trunnion block....	08/09/2005
6679124	Statistically rigid and dynamically compliant material testing system A material testing system includes a base and first and second specimen holders. A first displacement sensor measures displacement of the first specimen holder relative to the base. In addition, a second displacement sensor measures displacement of the se...	01/20/2004
6666097	Method and device for measuring pushing and pulling forces A force measuring device and method for determining a force required to move a cart. The force measuring device includes a force generating device, a load member, a load cell, and a controller. The force generating device is connected to the load member a...	12/23/2003
6647802	Creep testing fixture and method A creep testing fixture and method for applying a precise amount of constant tensile stress to a creep test specimen to allow for precise measurement of creep in the test specimen. The fixture includes first and second mounting grips for holding opposite ...	11/18/2003
6553320	Method for testing the stability of vertically braced masts A method for testing the stability of vertically braced masts wherein the relevant mast is subjected to the load of a bending force starting from a defined initial value, and increasing to a maximum pre-set testing force above its bracing, the mast thereb...	04/22/2003
6446510	Force transducer assembly A force transducer assembly for measuring compressive and tensile loads applied to a force transmission device, the assembly includes a housing, a sleeve assembly and a sensor device. The housing has a hollow interior. The sleeve assembly is coupled withi...	09/10/2002
6341529	Method and apparatus for measuring substrate surface cleanliness A method and apparatus for estimating the degree of cleanliness of a substrate surface, particularly an inorganic surface used in the manufacturing of electronic components. A soft metal, eg., indium, probe is pressed against the substrate surface to be t...	01/29/2002
6339962	Force sensor A force sensor has an elastically deformable carrier (10; 110) which absorbs the force to be measured and on which there are a first and a second strain measurement element (21, 31; 121, 131) arranged such that the elastic deformation of the carrier (10; ...	01/22/2002
6314376	Method and device for checking the solidity of anchored standing masts According to the method suggested, the mast is submitted to an increasing force, and both this force and the deflection path are correlated to establish a characteristic load line. After it has been loaded, the mast is again relieved from the load, a char...	11/06/2001
6308577	Circuit and method of compensating for membrane stress in a sensor A circuit and method for correcting a sense signal of a sensor (100) where the sense signal is reduced by a negative nonlinear error component introduced by membrane stress in a sensor structure (101). A first transducer (103) is disposed at a location (2...	10/30/2001
6205862	Viscoelasticity measurement apparatus A viscoelasticity measurement instrument having a support whose position can be varied relative to a sample holder for holding an end portion of a sample. A detection rod is resiliently held to the support, and holds a part of the sample. When a DC or AC ...	03/27/2001
6176139	Compression-tension transducer, especially for electromechanical braking systems A pressure force sensor has two oppositely located connectors for a force introduction to an inside located force sensor module which emits an output signal as a function of an external pressure force, a fork arm attached to each of the connectors and hav...	01/23/2001
6079278	Ball spline joint slackness measuring method and measuring apparatus Slackness of a ball spline joint which engages a first member of a circular shape and a second member fitted outside of the first member is measured by measuring a displacement of a first measurement point (P1) and a second measurement point (P2). The mea...	06/27/2000
6055866	Process and device for checking the solidity of vertically anchored masts A method and apparatus or device are shown for checking the solidity of vertically anchored masts increasing tensile and compression forces which can be acquired with a force sensor are introduced into the mast above its anchoring, in order to load the ma...	05/02/2000
6029504	Tube loading apparatus A tube loading apparatus and method for tensile strength and leak testing an elongated, hollow tube such as a steam generator heat transfer tube of a steam generator plant. The apparatus may be used to determine the axial or compressive load placed on a h...	02/29/2000
5950142	Monitoring tension in tensioned longitudinally moving elongate elements The tension in an optical fiber being drawn from a preform is monitored by sensing its motion transverse to the drawing direction and analysing the sensed motion using an autoregressive time-series model to provide a power spectrum. One of the peaks of th...	09/07/1999
5948994	Multi-functional test machine A multi-functional test machine is provided. The machine includes a frame with a pair of upright columns parallel extended upward from a foundation, an upper crosshead system slidably engaged on the columns and actuated by a pair of hydraulic jacks buttin...	09/07/1999
5798463	Self-contained constant stress/constant strain test fixture A tensile test fixture for applying constant tensile forces to a tensile test specimen comprises two mounting grips, each mounted to one of two lever arms in a pivoted lever arm frame structure. One end of each lever arm is pivotally attached to a compres...	08/25/1998
5767402	Material testing system having DC brushless linear motor A material testing machine includes a support structure and a DC brushless linear motor operable to develop a force along a reaction axis. The DC brushless linear motor includes a set of magnets disposed along a line on the support structure parallel to t...	06/16/1998
5706698	Knitted yarns durability tester with vibration unit A tester for measuring a durability of a knitted yarn portion in which at least two sets of yarns, including a set of first yarns and a set of second yarns, are intersected, the tester includes: a first holding unit holding ends of the two sets of yarns a...	01/13/1998
4869112	Screw-driven actuator for test frame A mechanical screw drive loading test frame has a crosshead on the frame with a grip supported from the crosshead, and a second grip for gripping a second end of a specimen on which a second grip is connected to an axially movable shaft which is ragidly s...	09/26/1989
4464937	Extensometer readout circuit An extensometer readout circuit conditions a strain information signal, representing strain of a specimen being tested, in such a way that yield point measurements and final elongation measurements of such specimen may be concurrently obtained. The strain...	08/14/1984
4227400	Measuring cigarette characteristics during pyrolysis smoking The length and firmness of a cigarette rod during smoking are measured on automatic basis to determine the effects of blend, moisture and temperature on the firmness of a cigarette rod behind the coal of a burning cigarette....	10/14/1980
4018080	Device for tensioning test specimens within an hermetically sealed chamber A device for tensioning test specimens within an hermetically sealed chamber. The device is characterized by a support column adapted to be received within an insulated, hermetically sealable chamber, a plurality of anchor pins mounted on the column for r...	04/19/1977
3940974	Electrically compensated sensor A sensing device that may be employed as a thermal or stress sensor includes in one embodiment a pair of poled electret layers as sensing mediums for detecting variations in the ambient temperature of the sensor. The electret layers of such embodiment hav...	03/02/1976

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Class 73/796 - Tension-compression