214 MANUAL OF PACK TRANSPORTATION. 



At each end of hinge, cut or saw out in entirely similar manner as 

 that described for second section of hinge, simihir l)olts will be pro- 

 vided therefor. The ends of hinge to receive "side" plates of frame. 



In cutting out for bolt, the aid of templet may be employed. 



2. Staples for hinge {2). — Take a section of soft steel, 4 inches long, 

 one-half of an inch wide, and one-fourth of an inch thick; allow a 

 base of 1 inch at each end to rest on hinge, and form semicircle, 

 distance between bases to be 1 inch; provide a ^-inch hole at center 

 of each base to receive rivets. The circled portion of staple will be 

 rounded on under surface. These to receive two tug loops, 



3. Tug loops {triangular codceges) for hinge {A). — Take a section of 

 Norway round iron 7 inches long and five-sixteenths of an inch diam- 

 eter, shaped in this manner: Two and one-half inches from each end 

 turn at right angles so as to leave inside of base 2 inches wide; now 

 If inches from ends turn at right angles parallel with bases, this 

 leaves a perpendicular wall of three-fourths of an inch; now 1 inch 

 from each end turn upward and form circle, and weld. Two tug 

 loops will be provided for each staple. In applying staples to hinge, 

 measure 2^- inches from end of hinge to center of staple, the base of 

 staple conforming to shape of hinge, placed exactly in center of hinge, 

 the long way up and down. Now provide holes on hinge correspond- 

 ing with those on staple and coimtersunk holes on under side of 

 hinge. 



In riveting staples to hinge, provide one nut for each rivet, thick- 

 ness of nut to be five-sixteenths of an inch, diameter of hole in nut to 

 be three-sixteenths of an inch. Place nut between the folds or plates 

 of hinge so as to carry rivet; provide two tug loops for each staple, 

 and rivet staples securely to hinge; rivet will be flush with under 

 surface of hinge when riveted. 



Staples holding tug loops on hinge will be considered the outward 

 face thereof. 



4. Coupling or distance plates for hinges {2). — To be of sheet steel. 

 22 inches long, 3 inches wide, and one-sixteenth of an inch thick 

 (gauge 16), edges to be smoothed off. Now provide four holes at 

 each end three-sixteenths of an inch diameter, spaced in this manner: 

 At each end and one-half of an inch therefrom and one-half of an inch 

 from the upper and the lower edge provide one hole; now 2 inches 

 from ends provide two simihir holes; these holes to be coimtersunk 

 on one side of coupling plate. 



In applying coupling plates to hinges, place plate on the under side 

 of hinge and one- half of an inch from end, end of coupling plate to be 

 flush with the outward edge of hinge, holes as countersunk on coup- 

 ling phite will be considei-ed the downward side. 



Now provide corresponding holes on the lower plate only of hinge, 

 and rivet down securely. 



Now provide 10 similar holes on coupling plate, between hinges, 5 

 holes on the upper side and 5 holes on the lower side of plate, spaced 

 in this manner: Four inches from each end of coupling plate, and 

 three-fourths of an inch from the upper and the lower edge jirovide 

 1 hole, and between these, on the upper and lower side, provide 3 

 holes, spaced equally distant, these holes to be countersunk on the 

 under side, in similar manner. These to receive rivets and screws for 

 wooden stiffeners. 



