Honda CB350 CL350 [137/219] Electrical parts 126

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126 5 ELECTRICAL PARTS Operation principle horn Fig 5 63 and construction of the 1 Curling horn 2 Diaphragm J Curling horn Diaphragm Pole B 4 Armature 5 Pole A 6 Case Core plate Coil Contact assembly Coupler black Horn clamp Cover Fig 5 63 Horn construction Amplification and radiation Vibrating plate to produce sound 3 Pole B Connector between arma ture and vibrating diaphragm 4 Armature Core source of vibrating 5 Pole A Core 6 Case Case for housing the com ponent parts 7 Core Core 8 Coil Generate magnetic field to attract the core 9 Contact assembly Circuit breaker 10 Terminal Electrical connection 11 Clamp assembly Attachment bracket Made of spring steel so that the sound will not be affected by the frame 12 Cover Appearance consideration and protection The principle of operation is as follows When the horn switch is closed the current flows to the terminal 10 Coil 8 Contact assembly 9 contact Plate B contact points contact Plate A terminal 10 and then the battery As the current flows through the magnetic field is set up pulling the armature coil a The armature which is connected to the diaphragm by the pole causes the diaphragm to flex and at the same time opens the contact points to disrupt the horn circuit This permits the diaphragm to snap back due to the tension of the diaphragm and again closing the contact points which energizes the coil to restart the sequence of the cycle The cycle is repeated continuously as long the horn switch is held closed This causes diaphragm to vibrate producing the sound of horn The curling horn amplifies this sound the proper loudness as the the to

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