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Louden Bird-Proof Barn Door Track and Hangers — Continued 



is turned away from the wall. In this position the bracket 

 will easily slip over the splice. 



In No. 3 the bracket is slipped entirely over the splice and 

 is turned the other way and fastened to the wall. In this 

 position the bracket binds down on the splice, holding it just 

 as firm and solid as though it were riveted or bolted in place. 

 This is a valuable and important feature, as the splice abso- 

 lutely prevents the ends of the track from separating and 

 making a rough place in the track, or possibly allowing the 

 trolley to drop out. The Louden Bird-Proof Track is the only 

 tubular track having this valuable feature. 



Galvanizing 



At a small additional cost the Bird-Proof Hanger may be 

 furnished galvanized if desired. We have our own galvanizing 

 plant. By this process steel or iron is covered with a heavy 

 galvanized coating which protects the metal from rust and 

 corrosion and gives it a longer life of service. 



The Trolleys 



The Louden Bird-Proof Hanger has a set of two tan- 

 dem trolleys. Each trolley has two solid iron wheels, fitted 

 with steel roller bearings and revolving on a steel 

 shaft. These wheels are carried in a heavy double truck 

 frame of steel with a corrugated rib to strengthen it. The 

 wheel shafts are riveted firmly into this frame at each end, 



and can never work loose or get out of order. Our patent revolving washer protects the bearings 

 from wear, reduces friction and adds years of life to the service of the hanger. 



Fig. 895 



Fig. 902 

 Roller-Bearing Tandem Trolley 



Page Sixty-two 



The supporting parts are of heavy 

 malleable iron, riveted to the truck 

 frame midway between the two wheels. 

 This malleable support comes down 

 just below the lips of the track and 

 carries a broad steel strap which at- 

 taches to the door. This is the .»econd 

 point of flexibility in the Louden Bird- 

 Proof Hanger, and allows the door to 

 swing freely sidewise. (See Fig. 902.) 



View B is an end or edgewise view 

 of one wheel, showing the rib or bulge 

 in the center of its face. This rib fits 

 neatly into the slot in the track (See 

 Fig. 961) and keeps the wheels always 

 in perfect alignment; they can never 

 wabble from side to side and bind or 

 rub against the side of the track. 

 View C shows the roller bearings of 

 the wheels. 



Fig. 19 

 Detail of Roller Bearing 



View B 



View C 



