Description of 3-Inch Telescopic Sights, Model of 1912
Description of 3-Inch Telescopic Sights, Model of 1912
United States Army Ordnance Dept
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When not in use these parts should be kept protected by the covers provided for the purpose. All bearing surfaces should be kept thor- oughly oiled, expecial care being given to the deflection worm (84) and bearings for the telescope which are of steel. Care should be taken not to remove the oil in putting on the covers. The oil should be wiped off before use. The cover should be removed and the sight bracket examined at least once in every two weeks, and the cradle should be moved in elevation... and deflection. 41. No oil should be allowed on the surfaces of the lenses and prisms. 42. Special care should be taken in the use of the small electric lamps, as they are fragile. Each lamp should seat in its receptacle not less than one and one-half turns. DISMANTLING AND ASSEMBLING. 43. General instructions for disassembling and cleaning are given in pamphlet No. 1795, Instructions for the Care, Preservation, Repair, and Adjustment of Instruments for. the Fire Control Systems for Coast and Field Artillery, paragraphs 24 to 28, and 35 to 38, inclusive.
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