MANUAL OF PACK TEANSPOKTATION. 217 



12. Swivel holts for clamps (4). — To be of malleable iron, length 2 

 inches, diameter one-half of an inch, head of bolt or rivet to be three- 

 fourths of an inch diameter, shaped in this manner: One and thirteen- 

 sixteenths inches from end of bolt turn down to three-eighths of an 

 inch diameter, head of bolt to be reduced in thickness to three- 

 sixteenths of an inch diameter, rim of head to be beveled on its upper 

 or outer surface. Head of bolt to be inclined at such slope so as to 

 fit flat against the face of clamp when clamp is applied to end of side 

 plate on form as made by "templet." In applying clamps on end of 

 side plate the free end of clamp will ride flush with upper end of form, 

 the edges of clamp flush with the edges of side plate. 



Now provide three-eighths of an inch hole horizontally through 

 form and stiffener, whose center is indicated by center of half-inch 

 hole on clamp. This to secure clamp to side plate by means of bolt 

 as provided. 



13. Box-rod nuts for swivel damps (4). — To be 2 J inches long, 

 diameter of hole three-eighths of an inch, and provided with thread 

 for set screw; now provide one hole at each end of box-rod nut, 

 diameter of hole to be three-sixteenths of an inch, hole to be one- 

 half of an inch from each end and in center. These to secure box- 

 rod nut to the outward face of clamp. 



14. Set screws for swivel clamps (4). — To be 1 inch long and three- 

 eighths of an inch diameter, thread on screw to correspond with that 

 on box-rod nut, and provided with wing nut on one end; this end will 

 be squared to receive wing nut hole in center of wing nut, to corre- 

 spond with the squared end of set screw, so as to fit snug, and to be 

 countersunk on the outward side and rivet down securely. Now in- 

 troduce set screw through box-rod nut from the front side, and bevel 

 end of set screw oval shape, giving sufficient head on end of set screw 

 to prevent extraction. 



Now place box-rod nut on the outward face of clamp, set screw in 

 center of half-inch hole, ends of box-rod nut to be equally distant from 

 the upper end of clamp, provide corresponding holes in clamp, holes 

 in clamp to be countersunk on the inner side, and rivet down se- 

 curely; rivets on the inner side of clamp will be smoothed ofl^ flush 

 with the inner side. 



15. Staples for swivel clamps (4). — To be made of "Norway" flat 

 iron 3^ inches long, one-half of an inch wide, and three-sixteenths of 

 an inch thick, shaped in this manner: One and one-fourth inches 

 from each end turn at right angles so as to leave the portion between 

 sides 1 inch in the clear. Now five-eighths of an inch from each end 

 turn outwardly at right angles, parallel with first portion; this for 

 base of staple. In center of each base each way provide a jVinch 

 hole for rivets. Now place staple on the under side of swivel clamp 

 at base, the long way, with the width of clamp, the ends equally dis- 

 tant on base; provide corresponding holes on clamp; holes to be 

 countersunk on the inner side on base of clamp, and rivet down se- 

 curely; rivets will be smoothed off on the inner side of swivel clamp, 

 so as to be flush with base. 



Staple on swivel clamp to receive litter strap, these to attach closed 

 litter to "frame" by means of staple on side plate as provided. In 

 securing swivel clamp to end of side plate, on form as provided, the 

 shorter side of clamp will be outward, and provide washer for swivel 

 bolt, diameter of hole to be one-half of an inch; introduce bolt through 



