The tool represented in our engraving is a combination of many, and is remarkable for its compactness and portability. It contains a punch, a screw-driver, an awl, and two square screw wrenches of different sizes. It is applicable as a vademecum to the wants of the machine-shop, factory, store, hotel, household and oflice, and will be a great aid to mechanicians who travel from city to city doing light work. In our engravings, Fig. 1 represents it open, showing all its parts, and Fig. 2 shows it as closed, to go into the pocket or box. A B, A' B' are two arms of a pair of pincers pivoted together at c, and provided at the short end, A', with a punch, D, fitting into a corresponding recess in B' ; in each of the short arms is cut a V-shaped recess, which when closed makes a square screw wrench, a. Close to the pivot on the longer wma is an- 0 , -- .....ouch of a different size, b. KacTi of the arms, A B, uo . ..Q mt ia iu ana jn these recesses fit the tools, E and i ; tlio awl, E, being pivoted to the end of A, so that it can turn and fold back, as in Fig. 2 ; to B is pivoted a screw-driver, F, which can also fold back when not in use; a spring is arranged at the back of these recesses to open the pincers. The recess is so cut at the cnA of the long arms that it forms a step or support for the tool that is in use ; the tool that is shut up leaving sufficient room for it to fit partly into its recess, so that both arms-lave a hold upon it. It is a combination of the roost useful tools, and was invented by I . A. J. Lamson, of New Worcester, Mass., who will give any desired information. It was patented September 15, 1837.
This article was originally published with the title "Lamson's Combination Tool" in Scientific American 13, 26, 208 (March 1858)