Patent ID: 7825614
Filing Date: 2010-11-02
Classification: H05B,Y02B

Abstract:
1. A modular voltage control transformer circuit for controlling the operating voltage level applied to an HID lighting unit, said modular voltage control transformer circuit including a base carrying a transformer, and a panel carrying a SPDT switch in a first position connecting full line voltage to said HID lighting unit for starting of said lighting unit, and in a second position said SPDT switch connecting a reduced voltage less than full line voltage to said HID lighting unit for sustained operation of said lighting unit, and a timing circuit effecting switching of said SPDT switch from said first to said second position after passage of a determined start-up time interval of full line voltage operation; wherein said circuit comprises: a base which is generally rectangular in front view and U-shaped in side view; said base including a generally rectangular back plate portion which defines mounting holes by which the modular voltage control transformer circuit can be secured within an enclosure; said base further including a connecting leg portion extending forwardly to carry a front plate portion; a recess cooperatively defined by the back plate portion, connecting leg portion, and front plate portion receiving a transformer assembly including a transformer core and windings; further including: a mounting assembly having a rear cushion member which is elastomeric and insulating and is interposed between said rear plate portion and said transformer; said rear plate portion defining a centrally located bolt hole, and a bolt received through this hole to receive the cushion member; said transformer core being received over said bolt, and another cushion member which is also elastomeric and insulating and sandwiching said transformer; a dimpled washer member and a nut securing said another cushion member, said transformer, and said rear cushion member onto said rear plate portion.