Lightbulb with envelope-fracture responsive electrical disconnect means

A safety lightbulb comprising:

• a base,
• a glass envelope connected to said base,
• at least one electrical contact extending from said base into said glass envelope,
• an arrangement for producing light in said glass envelope when current is supplied to said at least one electrical contact from a power source to which the base is connected,
• a safety arrangement in said base which automatically electrically disconnects said at least one electrical contact from the power source when said glass envelope is broken,
• wherein said safety arrangement includes an electrical contact member in said base and which is moved out of electrical contact with at least one of:
• the power source, and
• at least one said electrical contact
• when said glass envelope is broken,
• wherein said power source includes at least one electrical power lead extending into said base,
• wherein said safety arrangement includes a moving/restraining arrangement in said base for moving said electrical contact member out of electrical contact with at least one of:
• at least one said electrical power lead, and
• at lease one said electrical contact,
• when said glass envelope is broken, and
• wherein said moving/restraining arrangement includes a rod having one end in contact with an inner surface of said glass envelope and an opposite end which maintains said electrical contact member in electrical contact with at least one of:
• at least one electrical power lead, and
• at least one said electrical contact,
• during normal operation of said safety lightbulb when said glass envelope is unbroken.