Description And Instructions for the Use of the Aberdeen Chronograph
The book Description And Instructions for the Use of the Aberdeen Chronograph was written by author United States Army Ordnance Dept Here you can read free online of Description And Instructions for the Use of the Aberdeen Chronograph book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Description And Instructions for the Use of the Aberdeen Chronograph a good or bad book?
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RECORDING SYSTEM The recording system of the chronograph, which is entirely electrical, consists of three independent units, one for each screen and corresponding spark point. Each unit is composed of the following elements: COHDENSmS To produce a spark when a make circuit is used, a condenser (12) (Figs. 1 4 2) is employed. This is a paraffined paper condenser of 10 microfarads capacity (made up of fiTo units of 2 microfarads cap- acity each) and charged from the line which supplies the motor.... The charge passes into the condenser from the line thru the charging re- sistance (14) and (15). CHftROTHG RESISTANCES These resistance units (14) and (IS) (Figs. 1 & 2) of 5000 ohms each, are connected between the respective condenser terminals and the line. Their pin-pose is to protect the line against excessiTe currents when the condenser is closed on a circuit of low resistance. IHDtrCTION COIL The discharge of the condenser thru the primary (16) (Figs. 1 ic 2) of the induction coil induces a sufficiently high voltage in the secondary (IV) to cause a jump spark between the point (11) (connected to one side of the secondary) and the drum.
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