MOVABLE BOTTOM BOARDS LANGSTROTH SIMPLICITY HIVE. 140 



serve for all time, it should be made from well-seasoned timber, 

 neatly dressed and firmly put together. 



The following are the measurements : — A B from shoulder to 

 shoulder in the end pieces, 19 1-8 inches, or the full length of a top 

 bar. C D about 22 inches; A C and B D, 9 inches; E F 8i 

 inches, or the full depth of the length of one side of a frame; G 

 H, 17| inches, or the full length of the bottom bar of a frame. 

 a h and h a are two spiral springs, as shown in diagram No. 2; 

 h h the screws fixing the springs to the block ; c c, the points of 

 contact with the 9-inch side pieces, A C and B D. a a, two screws 

 firmly screwed into the frame block, but projecting about 1 inch, 

 around which the spiral spring is coiled in such a manner, so that 

 the portions of the springs a c shall have full play and capable 

 of extending to a suflRcient width to receive the side bars of 8ny 

 frame. The shoulders at A E and B E must correspond exactly 

 with the ])rojecting shoulder of the frame, both in length and 

 thickness. 



This bar-frame block can be made as a duplicate by fixing two 

 additional springs and two other side-pieces. Where a large 

 number of frames are to be made, a double frame block is a great 

 advantage in point of speed. With it a very large number of 

 handlings are avoided. 



iSi 



Fig. 2. 



Diagram No. 2 is an end of a double bar-frame block— r a h 

 and h a c are the two sets of spiral springs. The end pieces are 

 shown grooved, and the back tongued into it. It is not necessary 

 to fix the two ends by tongue and groove. Of course, it is both 

 neater and stronger; it also prevents any tendency to warping. If 

 the ends arc put on in four lengths instead of two grooved pieces 



.they should be securely fastened with screws. Care must be 

 taken that the side-pieces are at right angles with the edges of the 

 block. This block prevents all twisting in the frames, and the 



.external measurements of frames will be the same without the 

 least deviation. 



In i)utting the frame together prepare the top, bottom, and 



