Practical Carriage Building
Compiled by M.T. Richardson, Vol.1. 1891
Wheelwright Tools Part 2
The spoke tenons were further apart than the holes in the rim; but I could not spring them together and hold them without help, so I had a clamp made to pull them together till I could drive the rim on one more tenon, where I held it by the rim clamp, Fig. 81, when I put the spoke clamp, Fig. 82, on the next pair drew another spoke up to the hole in the rim, drove on the rim, holding with the rim clamp, and so on.
The spoke clamp is made from two bars of one and one- eighth by one-quarter inch tire iron. One has a threaded end of three or four inches, the other end a square bend, say three inches. The other bar has an eye made flat in one end, while the other end has a square bend, four inches long, with a one-half inch hole one inch from the bend on the short side. The bar having the threaded end is passed through the eye on through the hole, and has a hand nut to draw it up, making the bars slide one on the other. This is placed just inside the rim, with the hooks over a pair of spokes; then the hand nut is turned, drawing the spokes together.
This clamp is also useful to draw up joints in the rim that are prone to open. The hooks must be twisted, as shown by Fig. 84, to conform to the line of the spokes, or the clamp will slide toward the hub. The rim clamp consists of a rod of seven-sixteenths inch round iron, with a loop or eye long enough to come a little beyond the rim of a four-foot wheel.
A thread is cut on the outer end for a hand nut, inside of which is a plate having two bearings on the rod, and which is crowded to the rim by the hand nut, holding the rim while being wedged or otherwise operated upon.
These devices are easily made by any blacksmith, and will many times repay the outlay by the independence they give a woodworker when once used, obviating the annoying necessity of saying to some one, “Hold on to that a minute while I hold this.”
Fig. 80 of the engravings represents the rim clamp, and the slide plate A for this clamp is shown also in perspective. Fig. 81 is a view, in elevation, of the clamp used for driving out spokes. Fig. 82 is the clamp plate. Fig. 83 is a view, in elevation, of the spoke clamp. Fig. 84 is a plan view, showing the twist given to the hooks of the spoke clamp to prevent it from sliding toward the hub.—By F. C. HALSEY.