US830681A - Plumb-level. - Google Patents

Description

PATENTED SEPT. 11, 1906. W. A. SN BED. PLUMB LEVEL.

APYLIGATION FILED MAY 19.1906.

19i in uses no a co., IA'sumamu, u. c.

WILLIAM A. SNEED, OF HILLSBORO, MARYLAND.

PLUMB-LEVEL.

- Specification of Letters Patent.

Application filed May 19, 1906. Serial No. 317,789.

the following is a specification.

This invention relates to a plumb-boblevel device for use either on horizontals or perpendiculars; and it consists in the construction and arrangement of the several parts which will be more fully hereinafter set forth.

In the drawings, Figure 1 is an elevation of the combined plumb and level device embodying the features of the invention. Fig. 2 is adetail enlarged elevation of a portion of the same, showing parts thereof removed. Fig. 3 is a transverse vertical section on the line 3 3, Fig. 2.

Similar numerals of reference are employed to indicate corresponding parts in the views.

The numeral 1 designates the stock of the instrument, which may be constructed as usual and of any suitable length, width, and thickness. In the center and adjacent to one end the level and plumb devices are located, both being of precisely the same constructionl or arranged so that the one may be used for truing horizontals and the other for operating in conjunction with perpendicular structures. As each of the plumb and level devices is of exactly the same construction and varies only in the change of position, the description of one will apply to the other. The stock 1 at the points where'thelevel and plumb devices are located has circular openings 2 formed therein and head-slots 3, which normally communicate with the said openings. In addition lateral slots 4 are formed in the stock, for a purpose which will be presently explained. In each of the slots 2 a metallic cylinder 5 is mounted and is fully open at opposite ends. In the upper central portion of each cylinder 5 a slot 6 is formed which communicates with the head-slot 3 and secured on the upper part of the cylinder and projecting within the slot 3 are fulcrumears 7, disposed on opposite sides of the slot 6. A fulcrum-head 8 is arranged between the ears 7 and has terminal cone-bearings 9, of

any suitable nature, engaging the said ears,

and from the said head a rod 10 depends and is connected at its lower end to a bob 11,the slot 6 being sufliciently long to permit the rod 10 to swing unretardingly therein. Projecting outwardly from diametrically opposite points of the cylinder 5 and in planes at right, angles to the plane of suspension of the rod 10 are adjusting-arms 12, consisting of flat strips of metal secured to the cylinder and movably projected into the slots 4, The outer ends of the arms 12 are formed with arcuate slots 13, which are struck from the center of the cylinder 5 and are engaged by headed studs 14, said studs being preferably in the form of set-screws. These arms 12 by their adjustment may becaused to take up any irregularities or inequalities in the level or plumb devices which may arise from wear or other causes.

Normally the level or plumb device, including the rod 10 and bob 11, hangs centrally with respect to the cylinder 5, and any inequalities in a horizontal or a perpendicular structure will be instantly indicated by the movement of therod 10 and bob 11 to either one side or the other of the central p11 ane of the cylinder 5 and in accordance wit the direction of the inequality. From the opposite ends of the cylinder glass sight-plates 15 are disposed and held in place by annular covering or binding plates 16, which are secured by suitable means to the stock 1. These covering or binding plates fully inclose the slots 4 and also the slot 3, and from the exterior nothing is exposed except the sightplates 15, the said binding-plates, the rods 10, and bobs 11.

The improved combined plumb and level will be found exceptionally advantageous in its operation and use and is superior in many --waysto the ordinary spirit or double level and plumb device.

Having thus described the invention, what is claimed is 1. The combination with a stock, of a level or plumb comprising a cylinder having diametrically-opposed adjusting-arms with terminal 'arcuate slots therein extending transversely thereof, set screws engaging said slots and connected to the stock, a rod movably projecting into the cylinder and fulcrumed on the latter, a bob on the free extremity of the rod, and sight-plates applied against opposite ends of the cylinder.

2. In a device of the class set forth, the

combination of a stock having an opening therethrough and a head-slot normally communicating withsaid opening, and adjustingslots also formed in the stock in planes at Patented Sept. 11,1906.

inder from the fulcrum-head, a, hole on the [O lower extremity of the rod, and sight-plates secured against opposite ends of the cylinder.

In testimony whereof I afliX my signature in presence Of two Witnesses.

WILLIAM A. SNEED. Witnesses H, W. B. ROWE, H. NELSON BEAVER.

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