registry with the impaling pins, but the machine was of the intermittently revolving type, the stitch was completed while dial and thread needle paused in their lateral movement, and no problem of resuming registry with a moving dial arose because the dial remained stationary until needle and ratchet pawl returned to the initial starting position for the next forward movement. Bridges did not apparently have the conception of a continuously revolving pin ring, nor did he realize the advantages arising therefrom.
The greater speed in operation arising from a continuously and uniformly revolving pin ring was recognized by the inventor Arnold in patent No. 543,795, issued July 30, 1895. Arnold, however, was an inventor of sewing machines, having devised such a machine for producing "back" or retrograde stitches duringthe continuous movement of the work, in his patent No. 378,645. See also patents to Singer, No. 13,661, 1855; to Marble, No. 568,032, 1896; and to Sturtevant, No. 581,496, 1897. In his machine for sewing looped fabrics (patent No. 543,795), Arnold devised a sewing machine in which no attempt was made to place the loops in registry upon the impaling pins, but an automatic feeding device was used whereby the edges to be united were fed by impaling pins during an ordinary sewing operation as distinguished from a looping operation. The rough edges were then trimmed off by a trimming mechanism provided. Indeed, in his specifications Arnold states that a close, smooth seam may be secured "without employing the slow and expensive process of registering loops, as in