Apparatus for calibrating moisture measuring instrument

Claim 2

In combination: an instrument for measuring the moisture content of a sample of material; said instrument comprising a test cell including a pair of spaced apart electrodes, one of said electrodes having the form of a hollow container open at one end and the other of said electrodes being disposed within said container, a meter providing a readout indicative of said moisture content, and adjustable means selectively operable for recalibrating said instrument to ensure that said meter provides a correct readout; and apparatus for indicating whether or not said instrument is properly calibrated so that said adjustable means may be selectively operated to effect recalibration, if necessary, said apparatus comprising: a removable member for insertion between the electrodes of said test cell; means between said member and at least one of said electrodes for frictionally maintaining said member inserted in a predetermined position between said electrodes; a pointer having a predetermined position with respect to said test cell; and scale means on said member for cooperation with said pointer to indicate the extent to which said member is inserted between said electrodes and providing a readout on said scale correlated to the readout of the meter of said instrument when said instrument is properly calibrated and facilitating adjustment of said adjustable means to effect recalibration if said readout on said scale does not correlate to said readout of said meter.

Claim 3

A combination according to claim 1 wherein said means for maintaining said member inserted in a predetermined position comprises an electrically insulating element secured to said means for effecting frictional engagement between said removable member and at least one of said electrodes.

Claim 4

A combination according to claim 1 including means for detachably mounting said pointer in a predetermined position with respect to said test cell.

Claim 5

A combination according to claim 2 wherein said means for effecting frictional engagement comprises at least one electrically insulated member secured to said removable member.

Claim 6

A combination according to claim 3 wherein said means for detachably mounting said pointer comprises an electrically insulated ring for detachably mounting on said test cell, said ring having an opening therethrough for accommodating passage of said member.

Claim 7

In combination: an instrument for measuring the moisture content of a sample of material; said instrument comprising a test cell including a pair of spaced apart electrodes, one of said electrodes having the form of a hollow cylindrical container open at one end and the other of said electrodes having the form of a centrally disposed electrode concentrically mounted within said container, a meter providing a readout indicative of said moisture content, and adjustable means selectively operable for recalibrating said instrument to ensure that said meter provides a correct readout; and apparatus for indicating whether or not said instrument is properly calibrated so that said adjustable means may be selectively operated to effect recalibration, if necessary, said apparatus comprising: a hollow cylindrical member for insertion between the electrodes of said test cell; means for maintaining said member inserted in a predetermined position between said electrodes; a pointer having a predetermined position with respect to said test cell; and scale means on said member for cooperation with said pointer to indicate the extent to which said member is inserted between said electrodes and providing a readout on said scale correlated to the readout of the meter of said instrument when said instrument is properly calibrated and facilitating adjustment of said adjustable means to effect recalibration if said readout on said scale does not correlate to said readout of said meter.

Claim 8

In combination: an instrument for measuring the moisture content of a sample of material; said instrument comprising a test cell including a pair of spaced apart electrodes, one of said electrodes having the form of a hollow cylindrical container open at one end and the other of said electrodes having the form of a centrally disposed electrode concentrically mounted within said container, a meter providing a readout indicative of said moisture content, and adjustable means selectively operable for recalibrating said instrument to ensure that said meter provides a correct readout; and apparatus for indicating whether or not said instrument is properly calibrated so that said adjustable means may be selectively operated to effect recalibration, if necessary, said apparatus comprising: a hollow cylindrical member for insertion between the electrodes of said test cell; means for maintaining said member inserted in a predetermined position between said electrodes; a pointer having a predetermined position with respect to said test cell; and scale means on said member for cooperation with said pointer to indicate the extent to which said member is inserted between said electrodes and providing a readout on said scale correlated to the readout of the meter of said instrument when said instrument is properly calibrated and facilitating adjustment of said adjustable means to effect recalibration if said readout on said scale does not correlate to said readout of said meter.

Claim 9

A combination according to claim 6 wherein said means for mounting said member inserted in a predetermined position comprises means for effecting frictional engagement between said hollow cylindrical member and at least one of said electrodes.

Claim 10

A combination according to claim 6 including means for detachably mounting said pointer in a predetermined position with respect to said test cell.

Claim 11

A combination according to claim 7 wherein said means for effecting frictional engagement comprises at least one electrically insulated member secured to the inside wall of said hollow cylindrical member.

Claim 12

A combination according to claim 8 wherein said means for detachably mounting said pointer comprises an electrically insulated ring for detachably mounting on said container, said ring having an opening therethrough for accommodating passage on said hollow cylindrical member.

Claim 13

In combination: an instrument for measuring the moisture content of a sample of material; said instrument comprising a test cell including a pair of spaced apart electrodes between which an electrostatic field is established, one of said electrodes having the form of a hollow cylindrical container open at one end and the other of said electrodes having the form of a centrally disposed electrode concentrically mounted within said container, a meter providing a readout indicative of said moisture content, and adjustable means selectively operable for recalibrating said instrument to ensure that said meter provides a correct readout; and apparatus for indicating whether or not said instrument is properly calibrated so that said adjustable means may be selectively operated to effect recalibration, if necessary, said apparatus comprising: a hollow cylindrical member for dielectric material for insertion into said electrostatic field between the electrodes of said test cell; means for maintaining said member inserted in a predetermined position between said electrodes, said means comprising at least one electrically insulated member secured to the inside wall of said hollow cylindrical member for frictional engagement with said centrally disposed electrode; a pointer; pointer support means for detachably mounting said pointer in a predetermined position with respect to said test cell, said pointer support means comprising an electrically insulated ring for detachably mounting on said container, said ring having a central opening therethrough for accommodating passage of said hollow cylindrical member; and scale means on said member for cooperation with said pointer to indicate the extent to which said member is inserted between said electrodes and providing a readout on said scale correlated to the readout of the meter of said instrument when said instrument is properly calibrated and facilitating adjustment of said adjustable means to effect recalibration if said readout on said scale does not correlate to said readout of said meter.

Claim 14

In combination: an instrument for measuring the moisture content of a sample of material; said instrument comprising a test cell including a pair of spaced apart electrodes between which an electrostatic field is established, one of said electrodes having the form of a hollow cylindrical container open at one end and the other of said electrodes having the form of a centrally disposed electrode concentrically mounted within said container, a meter providing a readout indicative of said moisture content, and adjustable means selectively operable for recalibrating said instrument to ensure that said meter provides a correct readout; and apparatus for indicating whether or not said instrument is properly calibrated so that said adjustable means may be selectively operated to effect recalibration, if necessary, said apparatus comprising: a hollow cylindrical member for dielectric material for insertion into said electrostatic field between the electrodes of said test cell; means for maintaining said member inserted in a predetermined position between said electrodes, said means comprising at least one electrically insulated member secured to the inside wall of said hollow cylindrical member for frictional engagement with said centrally disposed electrode; a pointer; pointer support means for detachably mounting said pointer in a predetermined position with respect to said test cell, said pointer support means comprising an electrically insulated ring for detachably mounting on said container, said ring having a central opening therethrough for accommodating passage of said hollow cylindrical member; and scale means on said member for cooperation with said pointer to indicate the extent to which said member is inserted between said electrodes and providing a readout on said scale correlated to the readout of the meter of said instrument when said instrument is properly calibrated and facilitating adjustment of said adjustable means to effect recalibration if said readout on said scale does not correlate to said readout of said meter.

Claim 15

In combination: an instrument for measuring the moisture content of a sample of material; said instrument comprising a test cell including a pair of spaced apart electrodes and a meter providing a readout indicative of said moisture content, one of said electrodes being a hollow container open at one end and the other of said electrodes being disposed within said container; and apparatus for indicating whether or not said instrument is properly calibrated, said apparatus comprising: a removable member for insertion between the electrodes of said test cell; means between said member and at least one of said electrodes for frictionally maintaining said member inserted in a predetermined position between said electrodes; a pointer having a predetermined position with respect to said test cell; and scale means on said member for cooperation with said pointer to indicate the extent to which said member is inserted between said electrodes and providing a readout on said scale correlated to the readout of the meter of said instrument when said instrument is properly calibrated.

Claim 16

In combination: an instrument for measuring the moisture content of a sample of material; said instrument comprising a test cell including a pair of spaced apart electrodes and a meter providing a readout indicative of said moisture content, one of said electrodes being a hollow container open at one end and the other of said electrodes being disposed within said container; and apparatus for indicating whether or not said instrument is properly calibrated, said apparatus comprising: a removable member for insertion between the electrodes of said test cell; means between said member and at least one of said electrodes for frictionally maintaining said member inserted in a predetermined position between said electrodes; a pointer having a predetermined position with respect to said test cell; and scale means on said member for cooperation with said pointer to indicate the extent to which said member is inserted between said electrodes and providing a readout on said scale correlated to the readout of the meter of said instrument when said instrument is properly calibrated.

Claim 17

A combination according to claim 12 wherein said means for maintaining said member inserted in a predetermined position comprises means for effecting frictional engagement between said removable member and at least one of said electrodes.

Claim 18

A combination according to claim 12 including means for detachably mounting said pointer in a predetermined position with respect to said test cell.

Claim 19

A combination according to claim 13 wherein said means for effecting frictional engagement comprises at least one electrically insulated member secured to said removable member.

Claim 20

A combination according to claim 14 wherein said means for detachably mounting said pointer comprises an electrically insulated ring for detachably mounting on said test cell, said ring having an opening therethrough for accommodating passage of said removable member.

Claim 21

In combination: an instrument for measuring the moisture content of a sample of material; said instrument comprising a test cell including a pair of spaced apart electrodes, one of said electrodes having the form of a hollow cylindrical container open at one end and the other of said electrodes having the form of a centrally disposed electrode concentrically mounted within said container, and a meter providing a readout indicative of said moisture content; and apparatus for indicating whether or not said instrument is properly calibrated, said apparatus comprising: a hollow cylindrical member for insertion between the electrodes of said test cell; means for maintaining said member inserted in a predetermined position between said electrodes; a pointer having a predetermined position with respect to said test cell; and scale means on said member for cooperation with said pointer to indicate the extent to which said member is inserted between said electrodes and providing a readout on said scale correlated to the readout of the meter of said instrument when said instrument is properly calibrated.

Claim 22

In combination: an instrument for measuring the moisture content of a sample of material; said instrument comprising a test cell including a pair of spaced apart electrodes, one of said electrodes having the form of a hollow cylindrical container open at one end and the other of said electrodes having the form of a centrally disposed electrode concentrically mounted within said container, and a meter providing a readout indicative of said moisture content; and apparatus for indicating whether or not said instrument is properly calibrated, said apparatus comprising: a hollow cylindrical member for insertion between the electrodes of said test cell; means for maintaining said member inserted in a predetermined position between said electrodes; a pointer having a predetermined position with respect to said test cell; and scale means on said member for cooperation with said pointer to indicate the extent to which said member is inserted between said electrodes and providing a readout on said scale correlated to the readout of the meter of said instrument when said instrument is properly calibrated.

Claim 23

A combination according to claim 17 wherein said means for mounting said member inserted in a predetermined position comprises means for effecting frictional engagement between said hollow cylindrical member and at least one of said electrodes.

Claim 24

A combination according to claim 17 including means for detachably mounting said pointer in a predetermined position with respect to said test cell.

Claim 25

A combination according to claim 19 wherein said means for effecting frictional engagement comprises at least one electrically insulated member secured to the inside wall of said hollow cylindrical member.

Claim 26

A combination according to claim 19 wherein said means for detachably mounting said pointer comprises an electrically insulated ring for detachably mounting on said container, said ring having an opening therethrough for accommodating passage of said hollow cylindrical member.

Claim 27

In combination: an instrument for measuring the moisture content of a sample of material; said instrument comprising a test cell including a pair of spaced apart electrodes between which an electrostatic field is established, one of said electrodes having the form of a hollow cylindrical container open at one end and the other of said electrodes having the form of a centrally disposed electrode concentrically mounted within said container, and a meter providing a readout indicative of said moisture content; and apparatus for indicating whether or not said instrument is properly calibrated, said apparatus comprising: a hollow cylindrical member for dielectric material for insertion into said electrostatic field between the electrodes of said test cell; means for maintaining said member inserted in a predetermined position between said electrodes, said means comprising at least one electriclly insulated member secured to the inside wall of said hollow cylindrical member for frictional engagement with said centrally disposed electrode; a pointer; pointer support means for detachably mounting said pointer in a predetermined position with respect to said test cell, said pointer support means comprising an electrically insulated ring for detachably mounting on said container, said ring having a central opening therethrough for accommodating passage of said hollow cylindrical member; and scale means on said member for cooperation with said pointer to indicate the extent to which said member is inserted between said electrodes and providing a readout on said scale correlated to the readout of the meter of said instrument when said instrument is properly calibrated.

Claim 28

In combination: an instrument for measuring the moisture content of a sample of material; said instrument comprising a test cell including a pair of spaced apart electrodes between which an electrostatic field is established, one of said electrodes having the form of a hollow cylindrical container open at one end and the other of said electrodes having the form of a centrally disposed electrode concentrically mounted within said container, and a meter providing a readout indicative of said moisture content; and apparatus for indicating whether or not said instrument is properly calibrated, said apparatus comprising: a hollow cylindrical member for dielectric material for insertion into said electrostatic field between the electrodes of said test cell; means for maintaining said member inserted in a predetermined position between said electrodes, said means comprising at least one electriclly insulated member secured to the inside wall of said hollow cylindrical member for frictional engagement with said centrally disposed electrode; a pointer; pointer support means for detachably mounting said pointer in a predetermined position with respect to said test cell, said pointer support means comprising an electrically insulated ring for detachably mounting on said container, said ring having a central opening therethrough for accommodating passage of said hollow cylindrical member; and scale means on said member for cooperation with said pointer to indicate the extent to which said member is inserted between said electrodes and providing a readout on said scale correlated to the readout of the meter of said instrument when said instrument is properly calibrated.