Apparatus providing a shatter-resistant electric lamp
AssigneePhillips Petroleum Company
InventorsHarold D. Boultinghouse, Kenneth P. Taylor
Life of this patent
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Abstract
A shatter-resistant electric lamp includes a base; contacts for connecting the lamp to a source of electrical energy; a filament or light source electrically connected to the contacts for converting electrical energy to light; a shatterable encasement, connectable to the base, for translucently encasing the filament; and a polymer coating deposited on a first portion of the encasement so that a second portion of the encasement remains uncoated. The preferred polymer coating is poly(phenylene sulfide).
Claims15
A shatter-resistant electric lamp, comprising:
- a base;
- contact means for connecting the lamp to a source of electrical energy;
- filament means, electrically connected to the contact means, for converting electrical energy to light;
- shatterable encasement means, connectable to the base, for translucently encasing the filament means, the shatterable encasement means having a first surface;
- and
- a poly(phenylene sulfide) coating deposited on a first portion of the first surface of the encasement means so that a second portion of the first surface of the encasement means remains uncoated.
A shatter-resistant electric lamp, comprising:
- a base;
- contact means for connecting the lamp to a source of electrical energy;
- filament means, electrically connected to the contact means, for converting electrical energy to light;
- shatterable encasement means, connected to the base, for encasing the filament means, the encasement means being made of translucent glass and the encasement means having a first surface;
- and
- an opaque poly(phenylene sulfide) coating deposited on a first portion of the first surface of the encasement means so that a second portion of the first surface of the encasement means remains uncoated and translucent, the coating being between about 0.001 inches and about 0.003 inches thick.
A shatter-resistant electric lamp, comprising:
- a base;
- contact means for connecting the lamp to a source of electrical energy;
- filament means, electrically connected to the contact means, for converting electrical energy to light;
- a translucent glass bulb having a smaller fist end connectable to the base, a larger second end spaced away from the first end, a side section sealingly connected between the first end and the second end, the first and second ends generally defining an axis extending between the first and second ends, an inside surface adjacent the filament means, and an outside surface;
- and
- an opaque, poly(phenylene sulfide) coating deposited on a first portion of the outside surface of the translucent glass bulb so that a second portion of the outside surface of the translucent glass bulb remains uncoated and translucent, the coating extending from the first end of the translucent glass bulb to a peripheral area of about greatest radial extension by the side section, the coating being between about 0.001 inches and about 0.003 inches thick.
An encasement for the light source of an electric lamp, comprising:
- shatterable encasement means, connectable to the lamp, for translucently encasing the light source, the shatterable encasement means having a first surface;
- and
- a poly(phenylene sulfide) coating deposited on a first portion of the first surface of the encasement means so that a second portion of the first surface of the encasement means remains uncoated.
Dependencies are inferred from the claim text.