[866]. Gusset plate joint for diagonal ties and struts.
[867]. Mode of jointing boiler plate corners by tapering the corners of the plates.
[868]. Another form of angle joint.
Section 48.—LEVERS.
Levers are of three orders (see [Section 53]). The fulcrum or rocking centre may be at either end or at some intermediate point. In practice the fulcra are usually shafts or pins (see [Sections 76] and [77]), and the following are the typical forms in use.
[869], [870], [871], & [872]. Elevation and plans of plain levers, with end bosses for rod attachments.
[873]. Plan of plain lever, with forked end.
[874] & [875]. Bell crank levers, with plain or forked ends.
[876]. T or double cranked lever.