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©2015 - v 5/15 Science First® ©2006 Science First® . 615-4015 (10-105) Electric Bell Demonstrator Instructions & Experiments 10-105 Electric Bell Demonstrator Parts List: Main bell assembly Warranty Replacement Parts classroom. & Its large size and but may experience intermittent design all allows even the back stalling.parts Our 20-045 Weopen replace missing or defective freehand of charge. All products are guaranteed free from defect for 90 row to see the operation of the generator will produce around 5 days after sale, defined as 90 days after date ofandinvoice. This guarantee does not include accident, misuse, or moving parts and the electrical volts of direct current, is a components. Complete the circuit nice addition to the normal wear and tear. using a low voltage DC power demonstration. A DC power source and watch the circuit open supply may be used to Introduction: and close with an audible ring. demonstrate performance An electric bell is a great instrument toatdemonstrate differences different voltages.a simple electric circuit. Our 6 volt electric bell kit is a Do not exceed 6 volts. Other materials great – if noisyneeded: – addition to your classroom. ItsAlarge size and open design allows even the back row to see switch may be placed in • Hand generator: the operation of theour moving parts andthe the between bellelectrical and the powercomponents. Complete the circuit using a low voltage We recommend 20to add control to the 045 Hand Generator; this DC power source and watch thesource circuit open and close with an audible ring. demonstration, the Science First allows students to 10-101 Banana Plug Switch manually produce the Other materials needed: works well for this application. electricity needed to • Hand generator: There is an adjustment power the bell. screw on the upper left handallows students to manually produce the electricity needed • Battery Pack: We recommend our 20-045 Hand Generator; this side of the bell (see diagram). We recommend our 10to power171 theBattery bell.Pack which Loosen the thumb screw on the top of the post. Now you may four D-cell batteries • Batteryholds Pack: adjust the screw on the left hand for a total operating output side. This adjustment willholds four D-cell batteries for a total operating output of 6 of 6 volts. This also We recommend ourpack 10-171 Battery Pack which shorten or lengthen the swing of has tapping socket to volts. This pack also has tapping socket to easily switch to 1.5, 3, or 4.5 volts. the clapper arm. Experiment easily switch to 1.5, 3, or with this adjustment when using 4.5 volts. power supply: • Low voltage multiple voltages. This • Low voltage power adjustment be used vary A low voltage may bemayused totopower the bell; the ideal operating voltage is 6 volts. supply: DC power supply the speed and volume of the A low voltage DC power Operation: Wooden base bell as well. supply may be used to Instructions powerneed the bell;to thebe ideal The Electric bell demonstrator will set up prior to use. After removing the parts from the package, slide the bottom of operating voltage is 6 Warranty the bell and intoParts: the slot on the wooden now be viewed from an upright position. Next, attach a power source to it works: volts. base. The bell mayHow We replace all missing The 10-105 Electric Bell the positive terminals (see diagram). The Demonstrator bell will operate best with a 6 volt power supply. The bell may operate at or defective partsand free ofnegative charge. shows a simple Operation: All products as are low guaranteed free but may experience intermittentelectric circuit at work.20-045 The voltages as 1.5, stalling. Our hand generator will produce around 5 volts of direct The 10-105 Electric bell from defect for 90 days after circuit begins as power is demonstrator will need to be set current, and isdays a nice power supply may be used to demonstrate performance differences at sale, defined as 90 after addition to the demonstration. A DC supplied to the terminals, the up prior to use. After removing date of invoice. This guarantee circuit is closed and the the parts from the package, slide different voltages. Do not exceed 6 volts. A switch may be placed in between the bell and the power source to add control to the does not include accident, electromagnet coils become the bottom of the bell into the slot misuse, or normal wear andScience First 10-101 Banana Plug Switch demonstration, the works well infor this application. There is an adjustment screw on the powered (follow the arrows on the wooden base. The bell tear. the diagram below). be viewed from an Loosen the upper left hand side of the may bellnow (see diagram). thumb screw on the top of the post. Now you may adjust the screw on the upright position. Introduction: Science First left hand side. This adjustment will shorten or lengthen the swing of the clapper arm. Experiment with®this adjustment when using Next, attach a power An electric bell is a source to the positive and multiple voltages. This adjustment may be used to vary the speed and volume of the bell as well. great instrument to demonstrate negative terminals (see diagram). a simple electric circuit. Our 6 the electromagnet to be cut off. The bell will operate best with a 6 How it works: Without the magnet pulling the volt electric bell kit is a great – if volt power supply. The bell may clapper towards it, it springs noisyElectric – addition toBell your Demonstrator shows a simple electric circuit at work. The circuit begins as power is supplied The to the terminals, the operate at voltages as low as 1.5, back into contact with the adjustment screw. The circuit is circuit is closed and the electromagnet coils become powered (follow the arrows in the diagram below). re-established and the entire 95 Botsford Place, Buffalo, N.Y. 14216 U.S.A. process begins again. • Elastic716-874-0133 collisions ® ® · 800-875-3214 · FAX 716-874-9853 · [email protected] · www.sciencefirst.com Science First Science First P/N 24-2105 • Inelastic collisions ® ® ©2006 Science First® ©2006 Science First ©2006 Science First . . As the electromagnet coils become powered, the clapper arm is pulled towards the magnet contacts and the bell dome is rang (see below). . As the clapper is pulled towards the electromagnet it no longer touches the adjustment screw, and the circuit is broken. This results in the power going to . . © Science First® / Morris & Lee Inc. All rights reserved. Science First® is a registered trademark of Morris & Lee Inc. Revised 9-06. the electromagnet to bethe cutelectromagnet off. to Without the electromagnet be cutthe off. tomagnet be cutpulling off. the clapper Without towards it, it springs back into contact the magnetthe pulling the pullingwith Without magnet the the adjustment screw. The circuit is towards re-established and the entire clapper towards it, it springsit, it springs clapper process begins again. back into contact with the back into contact with the adjustmentadjustment screw. The circuit The is circuit is screw. re-established and the entire re-established and the entire process begins again. process begins again. P/N 24-2105 P/N 24-2105 ® . © Science©First / Morris . Science First&® Lee / Morris & Lee . As the electromagnet coils . Inc. All rights reserved. As the electromagnet coils Inc. All rights reserved. As the clapper is pulled becomebecome powered, the electromagnet clapper As is thepulled clapper is pulled Science First® is a registered Aspowered, the Asthe theelectromagnet clapper the clapper towards it no First® is a registered arm is pulled towards the towards the electromagnet it no trademarkScience of Morris Inc. become powered, armcoils is pulled towards thethe longer towards the electromagnet touches the adjustment trademark&ofLee Morris & Lee Inc. magnet contacts and the bell longer touches the adjustment Revised 9-06. clapper arm is and pulled magnet contacts the tobell screw, it noand longer touches the the circuit is broken. Revised 9-06. dome is rang (see below). screw, and the is broken. dome is rang (see below). wards the magnet contacts Thisadjustment andcircuit the to results in screw, the power going This results in the power going to and the bell dome is rang. circuit is broken. This results in the power going to 95 Botsford Place, Buffalo, N.Y. 14216 U.S.A. SCIENCE FIRST ® | 86475 Gene Lasserre Blvd., Yulee, FL 32097 716-874-0133 | 800-875-3214 | [email protected] · 800-875-3214| ·www.sciencefirst.com FAX 716-874-9853 · [email protected] · www.sciencefirst.com