The Construction of the Crossbow (Continued)
The Groove for the Bolt
In this groove the bolt is laid when the crossbow is ready for discharging.
Fig. 64 .- The Brass Groove Fitted Into The Surface
of the Stock Scale 1/4 in. =1 in.
The groove (13 1/4 in. long, 3/32 in deep in its hollow) may be of brass.
It reaches from the fore-end of the stock of the crossbow to the metal
socket which holds the revolving nut, fig. 64.
The short (3/4 in.) length of that part of the metal socket which is
in front of the nut, is recessed to correspond with the long separate grooved
piece which comes up to it, fig. 64.
The groove should be neatly and tightly morticed in flush with the surface
of the stock, fig. 65. It should have two or three thin pins to secure
it from slipping forward, and will have to be as smooth as glass and as
true as a gun-barrel from end to end.