Page:Miscellaneous Papers on Mechanical Subjects.djvu/177

		Time occupied.
		Min.	Sec.
4.	Next to a "barrel-bedding" machine, where a groove is cut for the barrel; this is done by four bits set with their guides in a row, in a eliding frame combined with a horizontal cutter, with a vibratory motion given by hand for shaping the groove conically, and a vertical bit for recessing	1	7½
	The next operation, that of finishing the groove by chisel, is performed by hand in 1 min. 42 sec.
5.	The stock is then sawn to the required length	0	11½
6.	A "bed" is next recessed for the side plate, the sides of the stock are flattened by two vertical cutters, and the bed is recessed by a horizontal bit	1	11¾
7.	The edges of the stock are then faced by a horizontal cutter	0	14
8.	The stock is next taken to a butt-plate machine, where a bed is recessed and screw holes made for the butt plate by a horizontal bit and screw, and also a vertical bit and screw	0	21⅓
9.	Next to a "band-fitting" machine, where three horizontal cutters cut three straight bands, and a fourth bevils the upper or bayonet band	0	22¾
10.	Next to a "band-finishing" machine, where four horizontal cutters round off the parts intervening between the bands	0	28½
11.	The stock is then turned a second time, in order to smooth its surface, 1st from the butt to the breech tang	8	35
12.	2nd, from the breech tang to the end of the stock	5	28
13.	It is next taken to the "lock bedding" machine, where the bed for the lock is recessed and shaped by five vertical bits set with their guides in a circular frame, at equal distances from each other. The driving-strap is made to run on a loose pulley fixed above the circular frame, and as each bit is brought into operation, the band drops from the loose pulley on the driving pulley of the bit which is brought underneath it, and is raised, when the operation is finished, to its former position, ready to descend on the pulley of the next bit. The cuttings are blown away by two fan-pipes	0	46¾