US812251A

US812251A - Level.

Info

Publication number: US812251A
Application number: US25207605A
Authority: US
Inventors: Tony Alexander
Original assignee: Individual
Current assignee: Individual
Priority date: 1905-03-25
Filing date: 1905-03-25
Publication date: 1906-02-13
Anticipated expiration: 1923-02-13

Description

PATENTED FEB. 13, 1906.

T. ALEXANDER.

LEVEL.

APPLIOATION FILED 1114.11.25

I 31 manta z ffllexaiad an a s'rnrns ATENT ,rrion.

' TONY ALEXANDER, OF BRooKHAvEN, MISSISSIPPI.

LEVEL.

Specification of Letters Patent.

Patented Feb. 13, 1906.

Application fi1ad March 25,1905. Serial No. 252,076.

To all whom) it may concern.-

Be it known that I, TONY ALEXANDER, a citizen pf the United States, residing at Brookhaven, in the county of Lincoln and State .of

' Mississippi, have invented certain new and useful mprovements in Levels, of which the following is 'a specification This invention relates to instruments designed chiefly for ascertaining horizontality the merits thereof and also to acquire a knowl-' edge of the details of construction of the means for effecting the result reference is to be had to the following description and accompanying drawings, in which Figure 1 isa perspective view of a hollow globe or sphere embodying the invention.

Fig. 2 is a top lan view thereof. Fig. 3 is a vertical centra section; Fig. 4 is a view similar to Fig. 3 of a modification.

Corresponding and like parts are referred to in the followin description and indicated in all the views of the drawings by the same reference characters. 7

The globe or sphere 1 is hollow and preferably formed of glass and is provided with a neck 2 and base 3, the latter bein preferably hollow upon its lower side to hol the neck 2 a short distance from the surface of the support, beam, or frame to which the globular ody may be attached. The globe .1 is filled with a liquid, such as alcohol or spirits, with the exception of a minute space to provide the accustomed air-bubble 4 for indicating the level or other determinate position. A

stopper 5 is fitted within the neck'2 and pre-'.

vents escape of the li uid and may be adjusted to vary the size 0 the air-bubble as may be required by changes in temperature orby any possible loss of the li uid from any cause The stopper 5 may be 0 any material, and

its end projects beyond the neck 2 a distance I to admit of it being conveniently gripped when it is required to adjust the air-bubble to meet existing conditions. The projectin end of the stopper extends into the space 0 the hollow base 3 and is held out of contact thereby with the surface 6, to which the level device may be attached.

At determinate points in the surfaceof the globe or sphere indicia are provided, as indicated at 7. Each indice consists of a cross and a series of concentric circles, the centers of the cross and circles coincidin The indicia are pressed in the surface o the lobular body and are preferably formed in t e inner surface, as shown most clearly in Fig. 3, althou h, as indicated in Fig. 4, they may be resse or otherwise formed in the outer sur- By having the marks pressed into the inner surface of the globe t e concavity is materially augmented and the sensitiveness of the level, proportionately increased. By reason of the spherical shape of the body the air-bubble presents a rounded appearance and coincides with one or the other of theconcentric circles, so as to accurately indicate the desired position. The indicia are located at the top and sides for designating perpendicular and horizontal lines and may be differently positioned if angles between the vertical and the horizontal are tobe determined. This is 'an'obvious application and may be readily comprehended.

In the modification shown in Fig. each indice has a contrasting color from the body centric circles are formed throu h the colored portion, so as to enable the hub le to be more readily located.

Having thus described .the invention, what is claime as new is- 1.; In a leveling device, a hollow body of globular or spherical form filled with a liquid with the exception of a minute space forming an air-bubble, and having indicia at. different points in its surface, each indice consisting of aseries of concentric circles.

2. In a leveling device, ahollow body of globular or spherical form filled with a liquidwith the exception of a minute space forming an air-bubble, and having indicia at different points in its surface, each indice consisting of.

of theglobe orsphere, and the cross and cona series ofconcentric circles, and a cross intersecting the lines of the circles and the centers, of the cross and circles coinciding. 3. In alev'elin device, ahollo'w body of spherical or glob ar. form containing a liquid and an air-bubble, and provided withiindicia inner 'surface'to'increase. the concavity and re at diflerent points in its surface and formed containing liquid and an air-bubble.

'W'ifih a neck and a base, said base being hol- In testimonymhereof I affix my signature low upon its under side all'lld thei neck adapted in presence of two witnesses.

to receive a stopper, t e en of which is 7 adapted to project into the space of said hol- TON1 ALEXANDER low base. v Witnesses:

4. In a leveling, device, a hollow-bodypf A. B. LACEY,

" globular form having indicia pressed into its L. H. JOHNSTON.