Front loading projection unit with wireform retention member
AssigneeGTE Products Corporation
InventorHarold L. Hough
Life of this patent
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Abstract
An improved projection unit which enables front removal of the unit's tungsten halogen projection lamp from the unit's glass reflector. A first retention member in the form of a boxlike metallic "can" is secured to the lamp's press sealed end and held in place by a wireform which pivots to engage a planar back surface of the glass reflector to provide said securement. The wireform is positioned on the boxlike "can" and can be inserted through the reflector's rear opening during lamp positioning.
Claims9
In a projection unit including a glass reflector having a front concave reflecting portion and a rear neck portion with an opening therein, an incandescent lamp including an envelope portion and a sealed end adjacent said envelope portion, a first retention member secured to said sealed end of said lamp for retaining said lamp therein and aligning said lamp within said reflector whereby said envelope portion will be positioned substantially within said front concave reflecting portion and said sealed end will be positioned substantially within said opening within said rear neck portion, said first retention member removably positioned within said opening and adapted for being removed through said front concave reflecting portion of said reflector, and a second retention member for retaining said first retention member within said opening of said reflector and permitting removal thereof through said front concave reflecting portion, the improvement wherein said second retention member comprises:
- a resilient member pivotally positioned on said first retention member for engaging said rear neck portion of said reflector to effect said retention of said first retention member within said opening of said reflector and for being secured in said position of engagement with said rear neck portion.
Dependencies are inferred from the claim text.