Heater

Claim 1

A SPACE HEATER COMPRISING A HOUSING, A HEAT EXCHANGER IN SAID HOUSING, MEANS FOR HEATING SAID HEAT EXCHANGER, AN AIR PASSAGEWAY WITHIN SAID HOUSING DEFINED BY SAID HEAT EXCHANGER AND ONE SIDE WALL OF SAID HOUSING, THE LOWER END OF SAID PASSAGEWAY BEING IN COMMUNICATION WITH THE SURROUNDING AIR SPACE AT THE FRONT WALL OF SAID HEATER, A SECOND AIR PASSAGEWAY WITHIN SAID HOUSING DEFINED BY SAID HEAT EXCHANGER AND THE TOP WALL OF SAID HOUSING, ONE END OF SAID SECOND AIR PASSAGEWAY BEING CONNECTED TO THE UPPER END OF SAID FIRST AIR PASSAGEWAY, A THIRD AIR PASSAGEWAY WITHIN SAID HOUSING DEFINED BY SAID HEAT EXCHANGER AND THE OTHER SIDE WALL OF SAID HOUSING, THE UPPER END OF SAID THIRD PASSAGEWAY BEING CONNECTED TO THE OTHER END OF SAID SECOND AIR PASSAGEWAY, A FOURTH AIR PASSAGEWAY WITHIN SAID HOUSING DEFINED BY SAID HEAT EXCHANGER AND THE FRONT WALL OF THE SAID HOUSING, THE UPPER END OF SAID FOURTH AIR PASSAGEWAY BEING CONNECTED TO SAID SECOND PASSAGEWAY, MEANS DEFINING A FIFTH AIR PASSAGEWAY WITHIN SAID HOUSING CONNECTING THE LOWER END OF SAID THIRD AND FOURTH PASSAGEWAY AND COMMUNICATING WITH THE SURROUNDING AIR SPACE AT THE FRONT WALL OF THE HEATER, THE DISTANCE BETWEEN THE WALLS OF SAID HOUSING AND THE WALLS OF SAID HEAT EXCHANGER BEING RELATIVELY SMALL SO AS TO SUBJECT ALL OF THE AIR FLOWING THROUGH SAID PASSAGEWAYS TO INTIMATE CONTACT WITH SAID HEAT EXCHANGER, AND MEANS FOR DRAWING A MASS OF AIR INTO SAID HOUSING AND FOR FORCING SAID AIR THROUGH SAID AIR PASSAGEWAY UPWARDLY IN THE FIRST PASSAGEWAY, HORIZONTALLY IN THE SECOND PASSAGEWAY, DOWNWARDLY IN THE THIRD AND FOURTH PASSAGEWAYS, AND OUTWARDLY IN THE FIFTH PASSAGEWAY.