Medical examination lamp provided with variable focusing means

Claim 1

IN A DEVICE OF THE CLASS DESCRIBED, AND COMPRISING A CYLINDRICAL TUBULAR CASING HAVING FRONT AND REAR SIDES, AN ELECTRIC LIGHT BULB IN SAID CASING, SAID CASING HAVING A CIRCULAR OPENING IN ITS REAR SIDE AND HAVING A HOLE IN ITS FRONT SLIDE, A HOLDER MOUNTED IN SAID CIRCUIT OPENING TO CLOSE SAID OPENING AND RECEIVING SAID BULB INSIDE SAID CASING, A HOLLOW BOSS HAVING SIDES AND HAVING AN OPEN REAR END FIXED TO THE OUTSIDE OF SAID CASING AND SURROUNDING SAID HOLE, THE SIDES OF SAID BOSS CONVERGING INWARDLY OF SAID BOSS AND OUTWARDLY OF SAID CASING TO FORM AN OUTLET HAVING WALLS, A PLANO-CONVEX LENS IN SAID BOSS, A GASKET INSIDE SAID BOSS AND CASING AND SAID LENS TO CLOSE SAID CASING AND BETWEEN SAID CASING AND SAID LENS TO CLOSE SAID HOLE TO PREVENT AIR ESCAPING FROM INSIDE SAID CASING, LIGHT RAYS RECEIVED FROM SAID BULB BEING ADAPTED TO PASS THROUGH SAID HOLE, OPEN REAR END, LENS AND OUTLET, A TUBE INTEGRALLY CONNECTED WITH AN END OF SAID BOSS AND HAVING SIDES ALIGNED WITH THE WALLS OF SAID OUTLET, SAID TUBE ADAPTED TO RECEIVE A MEDICAL ACCESSORY, THE BODY OF SAID BULB BEING SPACED FROM SAID SIDEWALLS OF SAID CASING A DISTANCE GREATER THAN THE DISTANCE THROUGH SAID BODY AND TRANSVERSELY THEREOF.