US1777429A - Level - Google Patents

Description

Oct. 7, 1930. R. c. cHARLTN I 1.777,429

LEVEL Filed Deo. 8, 1925 Patented Oct. 7, 1930 RICHARD C. CHARLTON, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNR T HENRY DISSTON & SONS, INCORPORATED, CDF PHILADELPI-IIA, PENNSYLVANIA, A COR- PORATION OF PENNSYLVANIA LEVEL Application filed December 8, 1926. Serial No. 153,337.

The object of my invention is to make a level of metal, especially alnminnm, so that it will be light in weight and yet substantial, and in which the space within the frame is open with exception at the points where the spirit glass holders are located. The invention also relates to certain details of construction hereinafter described.`

In the accompanying drawings:

Fig. 1 is a side view of my improvecl level;

Fig'. 2 is a transverse sectional view on the line 2-2, Fig. 1;

Fig. 3 is a transverse sectional view on the '1 line 3-3, Fig. 1; Fig. 4 is a transverse sectional view on the line H, Fig. 1; p

Fig. 5 is a detached perspective view of one of the end conneeting members;

Fig. 6 is a detached perspective view of one of the spirit glass holders;

Fig'. 7 is a detached view of one of the longitndinal side frames of the level; and

Fig. 8 is a detached perspective view of onehalf of a spirit glass holder.

The two longitudinal members 5-5 of the frame are T-shaped in cross-section and are connected together at their ends by members 6-6 of the shape shown in F ig. 5. Each of the end members has a channel portion 7 connected by a web-8 and a flange 9 the same width as the longitudinal members 5.

The web portion 10 of the sections 5 extend into the Channels of the portion 6 and through the flanged portion 9 thereof, while the bodies of the longitndinal members 5 eX- tend over the flange 9 so as to provide unbroken leveling snrfaces thronghout the length of the level.

The end members are connected to the longitudinal members by screws or rivets 11 which pass through the channeled portions and into the webs as shown in Fig. 2.

The spirit tube holders are made as shown in Fig's. 3 and 6. Each holder 12 is made in two Sections 13-13, which are shaped to fit the webs 10 of the longitudinal members as shown in Fig. 8, and are secnred thereto by transverse screws 14 or other fastening means.

Each section 13 has a deep circular fiange 50 15, and located within the fiange is a sightglass 16 held by a ring 17 secnred to the flange of the holder in any suitable manner.`

Each section has reeessed projections 19 for the reception of spirit tnbes 18.

The ends of the tnbes are embedded in plaster of Paris located in recesses of the projections 19 of the Sections of the holder. The

`zrojections 19 of one section overlap those of the other section, as shown in Fig. 3, so that the tubes are on the same line.

n the central holder are two spirit tnbes in the present instance, arranged longitndinally of the level, and in each end holder are two spirit tnbes arranged transversely. The middle tubes are level tubes while the end tnbes are plnmb tnbes. While two tnbes are shown, the holders may be provided with single tnbes. The level may be provided with level tnbes only, or with plumb tubes only, as desired.

The entire level is preferably made of alnminum. The tnbe holders are formed of pressed or cast aluminnm alloy, and the frame may be of extrnded, alnminnm alloy.

In some instances the tube-holders may be made in a single piece in place of the two Sections shown.

I claim 1. The combination in a level, of an open frame consisting of longitndinal members T- shaped in cross-section; end members having a fiange, a web, and'enlarged channeled portions` the foot of the T of each of the longitndinal members being secnred in the Channels of the channeled portions of the end members; and a spirit tube holder located between the two longitndinal members and secnred thereto.

2. The combination in a level of an open frame, made of two metallic longitndinal members T-shaped in cross section and end -1nembers, each end member being channeled to receive the webs of the longitndinal members and having' a lange of the same width as the longitndin al members, and a spirit tube holder secnred directly to the webs of the longitudinal members and forming the sole connection between the two longitndinal members at a point between the end members.

i RICHARD O. CHARLTON.

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