F - Mech Eng,Light,Heat,Weapons – 21 – V
Patent
F - Mech Eng,Light,Heat,Weapons
21
V
240/194
F21V 19/00 (2006.01)
Patent
CA 2017473
LD 9957 CEMENT-TYPE MOUNT FOR A LAMP INCLUDING MEANS FOR PROTECTING THE LAMP EXHAUST TUBE TIP AGAINST FRACTURE ABSTRACT For mounting a lamp that comprises a glass en- velope including a seal and a glass exhaust tube having a tip projecting from the seal, there is provided a base having a cavity for receiving the seal and the exhaust- tube tip. Within the cavity about the seal and the tip is a hard cement for fixedly positioning the envelope within the cavity. Surrounding the tip and located be- tween the tip and the adjacent cement is a thin layer of soft material that can yield in response to forces de- veloped thereon by thermal expansion and contraction of the cement, thereby protecting the tip from being cracked by these forces. The hard cement extends into contact with the glass seal about a substantial portion of the seal's exterior surface so that the hard cement is able to fixedly position the envelope relative to the base without interference from the softer material about the tip.
Company General Electric
Craig Wilson And Company
LandOfFree
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