US2990618A - Builders transit - Google Patents

Description

y 1961 w. E. PETREE ETAL. 2,990,613

BUILDERS TRANSIT Filed Oct. 16, 1958 '1 nul INVENTORS WILL/S E. P574255 BY MAL/S 6. P 716515.

United States Patent 2,990,618 BUILDERS TRANSIT Willis E. Petree and Willis G. Petree, both of Star Route, Mile 14, Palmer Highway, Anchorage, Alaska Filed Oct. 16, 1958, Ser. No. 775,667 1 Claim. (Cl. 33--63) This invention relates to improvements in builders transits, and the principal object is to provide a specially constructed bracket for supporting a pair of right-angularly disposed and fixed scopes, which while being vertically adjustable, always remain on vertical planes at a ninety degree angularity.

Another important object of the invention is to provide a builders transit such as is mentioned in the above object, particularly adapted for squaring buildings and building sites and other layout work, where a ninety degree angle is essential.

Still another object of the invention is to provide a structure of the character stated, which will eliminate costly mistakes through the element of human error.

A further object of the invention is to provide an assembly of the character stated which will reduce time and costs for layout work, up to approximately two-thirds.

Still a further object of the invention is to provide an assembly of the character stated which can be made factory accurate, thus eliminating unnecessary check-back time.

These and various other objects and advantages of the invention will become apparent to the reader of the following description.

In the drawing:

FIGURE 1 is a perspective view showing the present invention, in conjunction with a pair of right-angularly disposed scopes, mounted upon a standard leveling base.

FIGURE 2 is a side elevational view of the supporting bracket.

FIGURE 3 is a side elevational view looking at the bracket from a point ninety degrees removed from the View of FIGURE 2.

FIGURE 4 is a horizontal sectional view taken on line 44 of FIGURE 3.

Referring to the drawings wherein like numerals designate like parts, it can be seen that numeral generally refers to a conventional leveling base, upon which the present invention generally referred to by numeral 11 is secured.

The bracket consists of a one-piece sheet metal construction, consisting of a substantially rectangular shaped table, provided with a pair of depending walls 13, '14, depending from opposite side edges of the table 12. Also provided are an apertured attaching portion 13' integral with and extending outwardly of the lower end of the wall 13 at right angles thereto and an apertured attaching portion 14 integral with and extending outwardly of the lower end of the wall 14 at right angles thereto. The attaching portions 13' and 14 extend in opposite directions from each other and the portions 13 and 14 define therebetween a substantially horizontal plane.

The remaining opposite side portions of the table 12 are provided with upstanding walls 15, 16.

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The walls 13, 14 are provided with bearings 17 for receiving trunnions 18 of scope 19, while the upper walls 15, 16 are provided with bearings 20 for receiving trunnions 21 of an upper scope 22. The trunnions 18 and 21 of the scopes 19 and 22 extend in parallel horizontal superposed planes in parallel relation to the plane extending through the attaching portions 13' and 14'.

This situation of the bearings and trunnions establishes the two scopes 19 and 22, perpendicular to each other, that is at right angles and this ninety degree divergence can be established by the factory construction of the bracket 11.

Obviously, the scopes 19, 22 can be adjusted vertically, but will always remain in planes at right angles to each other.

Thus it can be seen, that layouts can be made easily with this solitary assembly, eliminating human errors and saving considerable time and labor.

While the foregoing description sets forth the invention in specific terms, it is to be understood that numerous changes in the shape, size and materials may be resorted to Without departing from the spirit and scope of the invention as claimed hereinafter.

Having described the invention what is claimed as new is:

A builders transit comprising a mount for fixed attachment to a conventional standard leveling base, bearing means on said mount for supporting the trunnions of a pair of scopes, the axes of the trunnions of said scopes being fixed at right angles to each other so that the scopes are disposed in vertical planes that are fixed at right angles to each other, said mount consisting of a bracket including a substantially rectangular-shaped table with said table being provided with depending side walls that are integral with opposite side edges of said table, attaching portions integral with and extending outwardly of the lower portions of said side walls, said attaching portions defining therebetween a horizontal plane, said side walls being adapted to be attached at their lower portions by said attaching portions to a standard leveling base and providing trunnions for supporting one scope, and upstanding walls projecting from and integral with the other opposite side edges of said table and on planes at right angles to the first mentioned walls and providing trunnions for supporting the second scope and the trunnion axes of said scopes extending in parallel horizontal superposed planes in parallel relation to the horizontal plane extending through said attaching portions.

References Cited in the file of this patent UNITED STATES PATENTS 515,815 Brightly et al Mar. 6, 1894 974,007 Wolcott Oct. 25, 1910 1,215,317 Chabre Feb. 6, 1917 1,366,498 Schauif Jan. 25, 1921 1,434,209 Hort Oct. 31, 1922 2,443,624 Lovell et a1. June 22, 1948 FOREIGN PATENTS 97,317 Germany June 13, 1898 20,215 Great Britain Aug. 30, 1910

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