Textile durometer
阅读：387发布：2022-04-30
专利汇可以提供Textile durometer专利检索，专利查询，专利分析的服务。并且A durometer for measuring the density of yarn windings and other materials and having a spring-loaded probe member for contacting and depressing the yarn in proportion to the density thereof and an electrical bridge having a potentiometer and an indicator means in circuit wherein the potentiometer includes a wiper arm mechanically coupled to the probe member. The wiper arm is moved along the potentiometer in correspondence with the movement of the probe member to vary the resistive characteristics of the bridge whereby the current flow through the indicating means is varied in such a way that the relationship of the relative positions of the probe member with respect to the current flow through the indicator means is substantially a linear one. In an improvement, an outer ring about the probe member is displaceable after the probe member has been displaced to a given position to cause a switch to be opened and prevent further increases in hardness indication.，下面是Textile durometer专利的具体信息内容。
1. A durometer for measuring the density of yarn windings and other similar materials, comprising: probe means for contacting and depressing said yarn windings in response to an applied force and having a first portion for contacting a surface of said textile material and displaceable in response to an applied force, and a second portion engaging said first portion after said first portion has been displaced by a predetermined distance and displaceable thereafter from a first to a second position as said first portion is displaced, means urging said first and second portions toward said given and first positions respectively; electrical bridge means having an electrical current indicating means therein for displaying a value indicating current and a potentiometer in circuit with said indicating means; said potentiometer including a wiper arm mechanically coupled to first portion of said probe means to move with corresponding movement of at least a portion of said probe means along said potentiometer for varying the resistive characteristics of said bridge means and for varying accordingly the current flow through said indicating means, said indicating means being calibrated to accurately indicate the relative position of said probe means and the hardness or density of the surface of the yarn windings or other material and said bridge means including: switch means connected to said detecting and producing means and to said current indicating means and engaging said second portion in said second position for shifting from a first to a second condition after said second potion has been displaced from said first positiOn to a second position and for preventing said signal from further changing said displayed signal when said switch means is in said second position; a source of electrical potential; a first resistor coupled between said source and said potentiometer to form a portion of a first arm of said bridge; said potentiometer in circuit between said first resistor and said source with one side of said potentiometer forming said first arm together with said first resistor and the other side of said potentiometer forming a second arm of said bridge; a second resistor coupled to said source and to said fixed resistor; a third resistor coupled between said second resistor and said source; said indicator means coupled to said wiper arm, and fourth resistor means coupled between said indicator means and the junction of said second and third resistors; said wiper arm movable along said potentiometer to vary the resistance of said first and second arms of said bridge.
2. A durometer as in claim 1 wherein the relationship of the relative positions of said movable portion of said probe means with respect to the current flow through said indicator means is substantially a linear one over the range of zero to maximum depression of said movable portion.
3. A durometer as in claim 1 wherein said probe means include: a housing member having a bottoming face for contacting the yarn or other material and for providing a reference point for movement of said movable portion; and said movable portion including spring-loaded indentor probe means mechanically coupled to said wiper arm.
4. A durometer as in claim 3 wherein said housing member has an axially located aperture therein and wherein said spring-loaded indicator probe means includes: a shaft member slidably extending through said aperature; a rounded probe rod integral with one end of said shaft member; spring means located around said shaft member and engaging an inner surface of said housing member and said probe rod for normally causing said probe rod to extend beyond the surface of said bottoming face; and retainer means affixed to said shaft member and at a location along said shaft outside of said housing member for limiting the normally extended position of said probe rod beyond the surface of said bottoming face to a predetermined distance.
5. A durometer as in claim 1 further including means for selectively placing said source in electrically conducting relationship with said bridge.
6. A durometer for measuring the hardness of a textile material comprising: a probe having a first portion adapted for contacting a surface of said textile material and displaceable from a given position in response to an applied force urging said first portion against said material, and a second portion engaging said first portion after said first portion has been displaced by a predetermined distance and displaceable thereafter from a first to a second position as said first portion is displaced, means for urging said second portion toward said first position, and means for urging said first portion toward said given position, means for detecting the position of said first portion during displacement in response to said applied force and producing an electrical signal which varies as a function of the portion position, meter means for receiving said electrical signal and displaying said signal as an indication of hardness, and switch means connected to said detecting and producing means and to said meter means and engaging said second portion in said second position for shifting from a first to a second condition after said second portion has been displaced from said first position to a second position and for preventing said signal from further changing said displayed signal when said switch means is in said second position.
7. A durometer as in claim 6 further including a plurality of electrical batteries and means for connecting said batteries to said meter means and to said detecting and producing means.
8. A durometer as in claim 7 further including a manually operable switch having a plurality of positions and connected to said meter means and a plurality of resistors connected to said switch for providing a plurality of scales for said meter means.
9. A durometer as in claim 6 wherein said detecting means includes a potentiometer having a resistance which varies as a function of the position of said portion.
10. A durometer for measuring the hardness of a textile material comprising: a probe having a portion adapted for contacting a surface of said textile material and displaceable from a first position in response to an applied force urging said portion against said material, means for urging said portion toward said first position, an outer ring about said contacting portion, and means urging said ring outward so that said ring moves to cause said switch means to shift to said second position only after said probe portion has moved a given distance, means for detecting the position of said portion during displacement in response to said applied force and producing an electrical signal which varies as a function of the portion position, meter means for receiving said electrical signal and displaying said signal as an indication of hardness, and switch means connected to said detecting and producing means and to said meter means for shifting from a first to a second condition after said portion has been displaced from said first position to a second position and for preventing said signal from further changing said displayed signal when said switch means is in said second position.
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