US Patent No. 97,106, granted November 23, 1869 to William and John W. Murkland of Lowell, Massachusetts, for an improvement in power looms for weaving ingrain carpet and other figured fabrics. It has three sheets of drawings (Figs. 1-11) and a four-page specification. The specification covers levers linking the trap-boards and journals, revolving cylinder shuttle-boxes controlled by the jacquard, spring-mounted shuttle-box frames that reduce jar at the beat, a changeable index-cam, a yielding filling-fork grate, and a device for reversing the lay-shaft. It also explains how the white and colored warp journals form the figure in ingrain carpet.