US740255A - Level. - Google Patents

Description

PATENTED SEPT. 29, 1903.

H. T. DILLON.-

LEVEL.

uruoumn FILED JULY 9, 1903.

N0 MODEL.

Patented September 29, 190 3 d HER-BERT T. DILLON, OF HENDERSON, MAINE.

LEVEL. I

sPEoIFIoA'rroN forming part of Letters Patent No. 740,255, dated September as, 1993. Application filed July 9,1903. Serial No. 164,845. (No model.)

To aZZ whom, it may concern:

Be it known that I, HERBERT T. DILLON, a citizen of the United States, residing at Henderson, in the county of Piscataquis and State of Maine, have invented new and useful Improvements in Levels, of which the following is a specification.

This invention relates to aleveling instrument, and more particularly to spirit-levels; and the object of the same is to provide in connection with an ordinary spirit-level an attachment for grading or ascertaining with accuracy the inclination of a surface, either in horizontal or "upright position, against which the level may be disposed to conveniently measure the angle of inclination of unlevel surfaces.

The invention consists in the construction and arrangement of the several parts, which will be more fully hereinafter described and claimed.

In the drawings, Figure 1 is a side elevation of a level embodying the features of the invention. Fig. 2 is a top edge plan view thereof. Fig. 3 is an elevation of the improved level looking to the side thereof opposite that shown by Fig. 1. Fig. 4 is a transverse vertical section on line 4 4:, Fig. 3.

Similarnumerals of reference are employed to indicate corresponding parts in the several views The numeral 1 designates a stock having spirit-levels 2 and 3 in connection therewith to adapt the stock for use in leveling horizontal and upright objects. The opposite sides of the stock 1 are also formed with longitudinal grip-depressions 4, and the extremity of the stock in advance of the spirit-level 3 is formed with an arcuate slot 5, opening into recesses 6 at opposite sides. The recesses are also of arcuate contour, and their walls are struck from the same center as the slot 5, the said center being at the corner of the opposite end of the stock on the side usually brought to bear against timbers or other objects to be leveled. To this corner the rear end of a metallic bar or strip 7 is pivotally attached, the said bar or strip being of practically the same length as the stock and having a pair of arcuate arms 8 projecting inwardly therefrom near its free end. The arms 8 are of the same length as recesses 6 and are adapted to slide in the latter. The

said arms are connected by a clamping-bolt 9, having a head 10 at one end bearing against the outer surface of one arm and a screwthreaded extremityll projecting through the other arm and engaged by a clamping-nut 12. The bolt 9 projects through and is movable in the slot 5, and when the said bolt engages the end of the slot nearest the bar or strip 7 the latter is limited in its outward projection, and when said bolt contacts with the opposite end wall of the slot the attachment will have been fully moved inward its full extent. The arm 8, against which the head 10 of the bolt has bearing, has'an indicator or pointer 13 secured thereon and extending transversely thereover, the opposite pointed extremities 14E of the indicator or pointer being movable over the contiguous edges of scale- plates 15 and 16. These plates have scale-marks 17 thereon representing either degrees or other measuring denominations, and the scale-marks on the plate 15 are of a more minute character thanthose on the plate 16. These marks will be preferably used'to designate degrees and fractions thereof to ascertain the angle of a' surface against which the bar or strip 7 may be disposed, so as to accurately inform the opera tor in view of certain corrections or as a guide in forming the contiguous edges of work at corresponding angles.

It will be seen that the bar or strip 7 is a grading or incline-measuring attachment and will form a valuable acquisition to an ordinary level without in the least detracting from the employment of the latter on true horizontal and perpendicular surfaces or in the use thereof in the'commonoperations of leveling. It will be seen that an ordinary level is prepared at one end to receive the attachment and when the grading or inclinemeasuriug attachment is disposed in close relation against the edge of the stock to which it is secured the complete device may then be employed as an ordinary level. It is preferred that the grading or incline attachment 7, together with the arms 8 thereof, be formed of non-corrosive metal or alloys, and it is proposed to use a similar metal or alloy in the construction of the plates 15 and 16. The

metal parts of the device may also be plated.

Having thus described the invention, what is claimed as new is- 1. Alevel-stock having the usual spiritlevel connected therewith provided with an arcuate slotat one end, scale-plates on one side of the stock adjacent to said slot, and

an incline attachment hinged to one end of' I both scale-plates.

2. A level comprisinga stock with the usual spirit-levels therein and having an arcuate slot projecting in a transverse direction over one end opening into opposite side recesses, an incline attachment in the form of a bar hinged to one end of the stock and adjustable in relation to the bottom edge of the latter, the said incline attachment having arcuate arms slidable in the said recesses, a clamping-bolt extending through the extremities of the arms and the'arcuate slot, scaleplates on one side of the stock adjacent to the slot between the contiguous edges of which the one arm has movement, and a double-end pointer carried by the arm moving between the plates, the ends of the'pointer projecting over onto the said plates.

In testimony whereof I al'fix my signature in presence of two witnesses.

HERBERT T DILLON.

Witnesses:

M. O. MORAN, H. CHADBOURNE.

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