table 1 is purposed for assisting the reading of the present disclosure , and should not be construed as a limitation of the scope of the present disclosure . it should be understood that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention . the embodiment described herein and the claims described hereof are not to be read restrictively , unless there is clear and convincing evidence manifesting a certain exclusion , restriction , or disclaimer . referring to fig1 , the preferred embodiment of the probe holder assembly of the present disclosure is comprised of an a - type probe 1 a housing a sensor ( not shown ), a fixed arm 2 , an adjusting arm 3 , a handle 4 , an adjusting actuator screw 5 a , an adjusting actuator retainer 5 b , an adjusting actuator 5 c , a direct cable 6 , a measuring instrument 7 , and a measuring target 8 . the probe holder assembly is configured to be able to alter the angle of a - type probe 1 a ( connected to measuring instrument 7 by means of direct cable 6 ) so that it can adjust to bends and obstructions around measuring target 8 . handle 4 holds fixed arm 2 that is connected to a - type probe 1 a as well as adjusting actuator screw 5 a and adjusting actuator retainer 5 b . adjusting actuator 5 c is connected to adjusting actuator screw 5 a and adjusting actuator retainer 5 b , as well as adjusting arm 3 . adjusting arm 3 is connected to a - type probe 1 a . the user turns adjusting actuator screw 5 a clockwise and counterclockwise , which when constrained by adjusting actuator retainer 5 b , extends and retracts adjusting actuator 5 c so that adjusting arm 3 bends , and tilts the angle of a - type probe 1 a . alternate adjusting positions of the probe holder assembly examining alternate positions of measuring target 8 are shown in fig1 a and 1 b . referring to fig1 a and 1 b , the bending moment deflects a - type probe 1 a in an adjustable arc in the thickness - length plane of adjusting arm 3 , in the direction of the arm under tension . reversing the direction of forces applied to adjusting arm 3 reverses the curvature of the arms . after a - type probe 1 a is fully angled , lengthwise displacement of the arms stops ; the forces couple at the arm ends in opposition through the sensor , resulting in a bending moment and arm curvature . examples of moving and holding adjusting arm 3 include , but are not limited to : a sliding motion and pinching between the index finger and thumb ; a thumb actuated sliding motion and a clamp ; a ratchet and pawl ; a thumb - actuated drive screw ; and a motor driven screw . it should be recognized by those skilled in the art that other means for adjusting and holding the arms to apply and hold a force used to adjust the curvature of the probe holder assembly are within the scope of the present disclosure . referring to fig2 , an alternative embodiment of the present disclosure is shown to differ to that of fig2 with a probe cable 6 b being lined sandwiched between two arms 2 and 3 . this alternative embodiment is comprised of a b - type probe 1 b , fixed arm 2 , adjusting arm 3 , a cabled handle 4 a , adjusting actuator 5 c , an instrument cable 6 a , probe cable 6 b , and measuring instrument 7 . partially contained within cabled handle 4 a , instrument cable 6 a is connected to measuring instrument 7 and probe cable 6 b . adjusting actuator 5 c is connected to adjusting arm 3 , which is connected to b - type probe 1 b . when the position of adjusting actuator 5 c is moved , adjusting arm 3 bends , which subsequently adjusts the tilt of b - type probe 1 b and keeps the positions of fixed arm 2 and probe cable 6 b in place . probe cable 6 b as a connecting means may include , but is not limited to , forms of the following : wires , cables , circuit boards , connectors , contact points , and conductive housings . the connecting means can be external to the probe holder assembly , between the arms , or part of the arm structure , any variation of which is within the scope of the present disclosure . referring to fig3 , a probe housing a sensor with cable can be adjustable and / or re - attachable instead of being incorporated into the probe holder assembly as in fig1 and 2 . the means of attachment of the attachable probe to the arms include a coupling 10 and a joint 9 . this alternative embodiment of the probe holder assembly is comprised of a ( re - attachable ) c - type probe 1 c with coupling 10 , fixed arm 2 , adjusting arm 3 , handle 4 , adjusting actuator 5 c , direct cable 6 , and joint 9 . direct cable 6 is connected to a measuring device ( not shown ), and to c - type probe 1 c . c - type probe 1 c is connected to and detachable from joint 9 . contained within handle 4 , fixed arm 2 is connected to coupling 10 . coupling 10 is also connected to adjusting arm 3 , and to adjusting actuator 5 c . coupling 10 is further connected to c - type probe 1 c via joint 9 . when the position of adjusting actuator 5 c is moved , adjusting arm 3 bends , adjusting the tilt of coupling 10 , joint 9 , and c - type probe 1 c . referring to fig3 a , another alternative embodiment of the present disclosure is shown to embody an inter - arm electrical connection design and a re - attachable probe . the probe holder assembly in this embodiment is comprised of : a d - type probe 1 d , fixed arm 2 , adjusting arm 3 , cabled handle 4 a , adjusting actuator 5 c , probe cable 6 b sandwiched between arms 2 and 3 , a cable - hosting coupling 10 a , and a cable joint 9 a . instrument cable 6 a is connected to the instrument ( not shown ) via a cable holder inside cabled handle 4 a . d - type probe 1 d includes a sensor with electrical connection and is connected to and detachable from cable joint 9 a . contained within cabled handle 4 a and fixed arm 2 , probe cable 6 b are connected to cable - hosting coupling 10 a . cable - hosting coupling 10 a is also connected to adjusting arm 3 , which is connected to adjusting actuator 5 c . cable - hosting coupling 10 a is further connected to d - type probe 1 d via cable joint 9 a . when the position of adjusting actuator 5 c is moved , adjusting arm 3 bends , which subsequently adjusts the tilt of adjusting arm 3 , cable joint 9 a , and d - type probe 1 d . referring to fig3 b , a pivoting joint 9 b alternative to cable joint 9 a in fig3 a is used . fixed arm 2 and adjusting arm 3 are connected to coupling 10 , which is connected to an e - type probe 1 e via pivoting joint 9 b . e - type probe 1 e tilts at an angle θ of coupling 10 . referring to fig3 c , embodiment of the probe holder assembly in fig3 b is shown with the arms curved in an arc . e - type probe 1 e tilts at angle θ of coupling 10 , and also at an additional angle π / 2 - φ from the bend of adjusting arm 3 . fixed arm 2 stays in place relative to adjusting arm 3 when the position of adjusting arm 3 is adjusted . referring now to fig4 a and 4 b , more alternative embodiments of the disclosure having pivot links between a probe coupling and arms are shown . more specifically , in fig4 , a first pivot link 20 and a second pivot link 21 are shown to connect coupling 10 with fixed arm 2 and adjusting arm 3 , respectively . in fig4 a , the combined motions are shown for adjustable arm 3 , joint 9 , and coupling 10 . an f - type probe 1 f , connected via joint 9 to coupling 10 , moves at an angle δ 1 when the position of adjusting arm 3 is partially extended . referring to fig4 b , the combined motions in fig4 a can be further extended . the position of f - type probe if tilts at an angle δ 2 by further extension of adjusting arm 3 . referring to fig5 , in yet another group of alternative embodiments , one can achieve separation and moves of the arms of the probe holder assembly by using arm collars . the collars can be long or short , rigid or elastic , nearer the center or nearer the ends of the arms , in order to allow more or less separation between the arms to achieve a desired curve shape . a - type probe 1 a tilts at a displacement d at an angle α when adjusting arm 3 bends from the movement of adjusting actuator 5 c . referring to fig5 a , an alternative embodiment having a collar that restricts mid - arm separation , is comprised of : a - type probe 1 a , fixed arm 2 , adjusting arm 3 , adjusting actuator 5 c , and a collar 11 . fixed arm 2 and adjusting arm 3 are connected to a - type probe 1 a , and pass through collar 11 . adjusting arm 3 is connected to adjusting actuator 5 c . when the position of adjusting actuator 5 c is moved , adjusting arm 3 bends and a - type probe 1 a tilts at a displacement d 1 at an angle α 1 . displacement d 1 and angle α 1 are determined by the adjustment of adjusting actuator 5 c , the dimensions and elastic properties of fixed arm 2 and adjusting arm 3 and the dimensions , and the elastic properties and position of collar 11 . referring to fig5 b , with collar 11 moved to a position at the ends of the arms , when adjusting actuator 5 c is moved , adjusting arm 3 bends via collar 11 , and a - type probe 1 a tilts at a displacement d 2 at an angle α 2 . referring to fig5 c , an embodiment having more than one collar restricting arm separation includes a multiple collar 11 al and a multiple collar 11 a 2 . fixed arm 2 and adjusting arm 3 are connected to a - type probe 1 a via multiple collars 11 al and 11 a 2 . adjusting arm 3 is also connected to adjusting actuator 5 c through multiple collars 11 a 2 . when the position of adjusting actuator 5 c is moved , adjusting arm 3 bends via multiple collars 11 al and 11 a 2 , and a - type probe 1 a tilts . referring to fig5 d , yet another alternative embodiment includes a joined collar 11 b . fixed arm 2 and adjusting arm 3 are connected to a - type probe 1 a via joined collar 11 b . adjusting arm 3 is also connected to adjusting actuator 5 c via joined collar 11 b . when the position of adjusting actuator 5 c is moved , adjusting arm 3 bends via joined collar 11 b , which adjusts the tilt of a - type probe 1 a . further referring to fig5 e , yet another alternative usage of a collar is shown as an embodiment with a movable sleeve 11 c to restrict mid - arm separation . movable sleeve 11 c , a movable sleeve adjusting handle 12 , a movable sleeve adjusting knob 12 a and a movable sleeve adjusting knob guide 12 b are used to control the move of adjusting arm 3 . fixed arm 2 is also connected via movable sleeve 11 c to movable sleeve handle 4 b . adjusting arm 3 is connected via movable sleeve 11 c to adjusting actuator 5 c . contained within movable sleeve handle 4 b , movable sleeve adjusting handle 12 has movable sleeve adjusting knob 12 a that a user guides through movable sleeve adjusting knob guide 12 b to adjust movable sleeve 11 c . when the position of adjusting actuator 5 c is adjusted via movable sleeve 11 c , adjusting arm 3 bends , adjusting the tilt of a - type probe 1 a . referring to fig6 , the probe holder assembly arms in accordance with the present disclosure are strip shaped , the lengths and widths of each strip being greater than the thicknesses . the widths of the arms of the present disclosure ( from a top view ) can be in the shape of a rectangular adjusting arm 16 t , a tapered adjusting arm 16 at , or a narrow - waist adjusting arm 16 b . from a side view , the arms can have the thicknesses of a rectangular adjusting arm 16 l , a tapered adjusting arm 16 al , or a hollow point adjusting arm 16 c . referring to fig7 from a side width view , the arm thicknesses can be a thick width arm 17 or a thin width arm 17 a . it should be appreciated that all variations of the arm shapes of the probe holder assembly are within the scope of the present disclosure . the size and shape of the arms are determined by the limits of an application for crevice size , angle of curvature , and actuating force . a stiff arm design may support a larger probe , and allow greater holding force against the inspection surface , but requires greater actuating force to affect a bend . the stiffness of an arm is determined by its second moment of area and by its modulus . the stiffness of an arm increases with its increasing moment of area and modulus of material used in its manufacture . the arm moment is frequently determined by application requirements , and arm stiffness is determined by material selection . arm materials are selected for intrinsic mechanical properties such as modulus , as well as price , fabrication and aesthetic attributes . examples of arm materials include , but are not limited to , high carbon steel , tempered stainless steel , beryllium - copper , rigid pvc , epoxy reinforced with graphite , glass or aramid fibers and bamboo . referring to fig8 , further alternatively , two or more arms can be employed to cause a bending moment to occur in the probe holder assembly . specially devised for this embodiment with multiple adjusting arms are adjusting arm 3 , a second adjusting arm 3 a , a multiple arm handle 4 c , a first adjusting actuator screw 5 a 1 , a second adjusting actuator screw 5 a 2 , a first adjusting actuator retainer 5 b 1 , a second adjusting actuator retainer 5 b 2 , a first adjusting actuator 5 d , a second adjusting actuator 5 e , and an arm attachment 18 . still referring to fig8 , fixed arm 2 and adjusting arm 3 are connected to a - type probe 1 a . fixed arm 2 is also coupled to second adjusting arm 3 a by means of arm attachment 18 , and to multiple arm handle 4 c . second adjusting arm 3 a is connected to second adjusting actuator 5 e . adjusting arm 3 is also connected to first adjusting actuator 5 d . contained within multiple arm handle 4 c , first adjusting actuator screw 5 a 1 is connected to first adjusting actuator retainer 5 b 1 , and second adjusting actuator screw 5 a 2 is connected to second adjusting actuator retainer 5 b 2 , which are connected to move first adjusting actuator 5 d and second adjusting actuator 5 e respectively . when first adjusting actuator screw 5 a 1 is turned clockwise or counterclockwise , it results in the extension or retraction of first adjusting actuator 5 d . when second adjusting actuator screw 5 a 2 is turned clockwise or counterclockwise , it results in the extension or retraction of second adjusting actuator 5 e . when the position of first adjusting actuator 5 d is moved , adjusting arm 3 bends , adjusting the tilt of a - type probe 1 a . when the position of second adjusting actuator 5 e is moved , second adjusting arm 3 a bends , which adjusts the position of arm attachment 18 , and causes fixed arm 2 to bend , also adjusting the tilt of a - type probe 1 a . referring to fig9 , a pair of arms can be separate strips joined to other members of the probe holder assembly , or can be opposite ends of a single strip extending from a loop formed in the strip between the arm ends , the variations of which are within the scope of the present disclosure . an alternative embodiment can be comprised of a - type probe 1 a attached to a first loop arm 19 a and a second loop arm 19 b to form an adjustable arm loop 19 . adjustable arm loop 19 is connected to a - type probe 1 a via first loop arm 19 a and second loop arm 19 b . the user can adjust the tilt of a - type probe 1 a by pressing and rubbing together loop arms 19 a and 19 b . although the present invention has been described in relation to particular embodiments thereof , many other variations and modifications and other uses will become apparent to those skilled in the art . it is preferred , therefore , that the present invention be limited not by the specific disclosure herein , but only by the appended claims .