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RATCHET SCREWDRIVER
SUMMARY - 14310_58

Aviation Boatswains Mate E - Aviation theories and other practices
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between the two plates holds them apart and retracts the fingers into the tube. With the bottom plate grasped between the fingers and enough thumb pressure applied to the top plate to compress  the  spring,  the  tool  fingers  extend  from  the tube in a grasping position. When the thumb pressure is released, the tool fingers retract into the tube as far as the object they hold will allow. Thus, enough pressure is  applied  on  the  object  to  hold  it  securely.  Some mechanical  fingers  have  a  flexible  end  on  the  tube  to permit their use in close quarters or around obstructions (fig. 1-75). NOTE The fingers are made of thin sheet metal or spring  wire  and  can  be  easily  damaged  by overloading. REVIEW QUESTIONS Q42. What are mechanical fingers used for? FLASHLIGHT LEARNING   OBJECTIVES:   Identify   the type of flashlight that belongs in every toolbox. Each    toolbox    should    have    a    standard    Navy vaporproof  two-cell  flashlight.  The  flashlight  is  used constantly during all phases of maintenance. Installed in  both  ends  of  the  flashlight  are  rubber  seals,  which keep out all vapors. The flashlight should be inspected periodically for these seals, the spare bulb, and colored filters, which are contained in the cap. NOTE Do not throw away the filters; they will be necessary during night operations. REVIEW QUESTION Q43. Identify the type of flashlight that belongs in every toolbox. INSPECTION MIRROR LEARNING  OBJECTIVES:   Describe   the use of inspection mirrors. Several types of inspection mirrors are available for use in maintenance. The mirror is issued in a variety of sizes  and  may  be  round  or  rectangular.  The  mirror  is connected  to  the  end  of  a  rod  and  may  be  fixed  or adjustable (fig. 1-76). The   inspection   mirror   aids   in   making   detailed inspections  where  the  human  eye  cannot  directly  see the inspection area. By angling the mirror, and with the aid of a flashlight, it is possible to inspect most required areas.   One   model   of   inspection   mirror   features   a built-in light to aid in viewing those dark places where use of a flashlight is not convenient. 1-47 Figure 1-76.—Adjustable inspection mirror. Figure 1-75.—Mechanical fingers.







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