Metalwork - Exam Papers - HL - Project - 1998
150 Marks
Instructions
Details of a Thermostatically Controlled Candle Extinguisher are show on the accompanying drawing.
- Make the project using the materials specified in the parts list.
- Design, manufacture and attach a candle holder to the model.
- Assemble the parts using the set screws supplied.
- Adjust and test using a 6 volt battery.
Parts List
| Part No. | Part Name | Required | Material and Description |
| 1 | BASE | 1 | PERSPEX |
| 2 | SUPPORT BRACKET | 1 | BRASS, COPPER OR ALUMINIUM |
| 3 | SPACER | 1 | PERSPEX |
| 4 | SPINDLE SPACER | 2 | BRASS |
| 5 | SPINDLE | 1 | BRASS |
| 6 | FORMER | 1 | ALUMINIUM, BRASS OR NYLON |
| 7 | ARMATURE | 1 | MILD STEEL |
| 8 | EXTINGUISHER CAP | 1 | ALUMINIUM |
| 9 | EXTERNAL SUPPORT BEAM | 1 | PERSPEX |
| 10 | BI-METALLIC STRIP | 1 | BI-METALLIC STRIP - Width : 10 - 15 mm, Thickness : 0.5 - 1.0mm |
| 11 | EXTINGUISHER ARM | 1 | BRASS OR STEEL |
| 12 | COUNTER WEIGHT | 1 | BRASS OR STEEL |
| 13 | CONNECTING LINK | 1 | ALUMINIUM OR COPPER |
As Supplied
| Part No. | Part Name | Required | Material and Description |
| 15 | COIL | 1 | APPROXIMATELY 300 TURNS OF INSULATED COPPER WIRE Ø 0.6 |
| 16 | CANDLE | 1 | WAX CANDLE (Ø8 - Ø15) |
| 17 | M5 x 6 SET SCREW | 2 | BRASS OR STEEL |
| 18 | M3 HEX SELF LOCKING NUT | 2 | BRASS |
| 19 | M3 x 6 SET SCREW | 1 | BRASS |
| 20 | M3 HEX NUT | 1 | BRASS |
| 21 | M6 x 20 SET SCREW | 1 | BRASS |
| 22 | M5 x 15 SET SCREW | 2 | BRASS |
| 24 | M5 HEX NUT | 4 | BRASS |
Design Element
| Part No. | Part Name | Required | Material and Description |
| 14 | CANDLE HOLDER | 1 | AS DESIGNED AND MANUFACTURED BY THE CANDIDATE |
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