| 摘要 |
1305074 Water heater casings JUNKERS & CO GmbH 9 Sept 1970 [27 Sept 1969] 43063/70 Heading F4A Rear wall 10 of a gas-heated water heater is generally flat with at least two vertical trapezoidal channels 19 and carries water-cock (11), gas cock (12), combination chamber (14) with heat exchanger (15) at the top of burner (13), and back-draught safety device (16) leading the flue gases into an outlet duct (17). The vertical edges 18 of the rear wall comprise flanges 181 parallel to the general plane of the back wall but offset by oblique webs 182. Vertical grooves 183 at the roots of the oblique webs 182 form rearward projections to abut the mounting wall. The rear wall is made hotgalvanized metal sheet rolled or otherwise treated to give the required profile along its full length, finally being cut into sections and having the necessary holes 191, &c. made. |
