APPENDIX F SOLDERING 

 12 Specifications for Outdoor Protector Mounting-boxes 



219 



The box used for mounting protector and switch for installation outdoors with 

 the 133'6 J telephone set shall be onad'e of clear, straight-grained, thoroughly 

 seasoned pine, spruce, or Douglas fir, according to the drawing attached hereto, and 

 made a part of these specifications. Hinges and hasp shall be of brass fastened by 

 brass screws. 



t _ , Cj ' " 



FEONT ELEVATION 



SIDE ELECTION 



BfcCK ELEU&TION 



Specifications 12 Design of outdoor protector mounting-box 



Finish. The box shall be planed smooth inside and' out and treated with a coat 

 American Telephone and Telegraph Co. specifications, as follows: No. 3438 for 40-60 

 inside and out with two coats of best paint either .grey, dark green, brown, or black. 



APPENDIX F 



SOLDERING METHODS AND MATERIALS 



Approved Solders. Approved solders are those made in accordance with the 

 American Telephone and Telegraph Co. specifications, as follows: No. 3438 for 40-60 

 iolder; No. 3439 for 45-55 solder; No. 3440 for 50-50 solder; No. 3441 for resiii flux 

 wire solder. 



Approved Fluxes. Approved fluxes are: (1) plumbers' candles for plumbing and 

 cable work; (2) resin; (3) the stick forms of flux made by the Northern Electric Co., 

 and (4) that known as "Allen's" stick. No other form of flux (such as paste or 

 liquid soldering salts) is to be used. 



Process. All parts to be soldered must first be thoroughly cleaned by scraping, 

 filing-, rubbing with emery paper, or some other method. In cleaning galvanized iron, 

 take care not to scrape off all the galvanizing. 



Heat the joint with the soldering-iron. Do not attempt to apply the solder with 

 the iron. Heating should be just sufficient to melt the resin of resin-core solder or ,of 

 the soldering stick, and the parts should then be thoroughly coated with the flux. 



