US769849A

US769849A - Combination measuring instrument.

Info

Publication number: US769849A
Application number: US18365103A
Authority: US
Inventors: William Blake Terry
Original assignee: Individual
Current assignee: Individual
Priority date: 1903-12-03
Filing date: 1903-12-03
Publication date: 1904-09-13
Anticipated expiration: 1921-09-13

Description

NO MODEL.

PATENTED SEPT. 18.1904.

W. B. TERRY.

COMBINATION MEASURING INSTRUMENT.

APPLICATION FILED DEO. 3, 1903.

|IlIllllllllllll-[llllvl'llllllllllllllll'llllllllllllll i? Inventr 7//am.7erry.

Attorney .Patented September 13, 1904.

IINTTED STATES PATENT EETQE.

WILLIAM BLAKE TERRY, OE ASPERMONT, TEXAS.

COMBINATION NIEASURING INSTRUMENT.I

SPECIFICATION forming part of Letters Patent No. 769,849, dated September 13, 1904.

Application filed December 3, 1903. Serial No. 183,651. (No model.)

T0 all, whom, t may concern,.-

Beit known that I, WTLLIAM BLAKE TERRY, a citizen of the United States, residing at Aspermont, in the county of Stonewall and State of Texas, have invented certain new and useful Improvements in Combination Measuring Instruments; and I do declare the following to beafull, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in measuring instruments.

The object of the invention is to provide an instrument having a wide range of usefulness in measuring', leveling, and surveying operations and so constructed as to be of advantage to mechanics and workmen of different callings.

In the accompanying drawings, Figure 1 is a side View of one side of the combination instrument, showing in dotted lines the extended positions of the parts. Fig. 2 is a similar View of the opposite side. Eig. 3 is an edge View. Fig. l is a detail sectional view on the line 4 A of Eig. 1. Fig. 5 is a similar view on the line 5 5 of Fig. 1. Fig. 6 isa detail fragmentary sectional view on the line 6 6 of Eig. 1.

Referring to the drawings more particularly, 1 denotes a square, the arms or

blades

2 and 3 of which are of equal length and are each, preferably though not necessarily, two feet in length and of suitable Width and thickness. The arms or blades of the square are formed with an inner core 4L, of Wood, which is inclosed in a metallic casing 5, constructed in two sections to permit the same to be applied to the wooden core, said sections being held in place by screws or other fastening devices 6. Between the adjacent ends of the outer side edges of the casing a space is left to form a groove or channel 7, the purpose of which will be hereinafter described. Connecting the ends of the arms is a curved blade or segment 8, which is so constructed as to be extended beyond the arms or

blades

2 and 3, as shown in dotted lines' in Fig. 1. The segmental blade 8 consists of a central body portion 9, which is substantially H-shaped in cross-section and provided with projecting side flanges 10, which are adapted to be engaged by

casings

12 and 13, said casings being arranged on the flanged sides l0 to slide in opposite directions. Set-screws 14 are provided near the ends of the casings l2 to engage the body portion 9 and hold said casings extended to any desired position. The body portion 9 of the segmental blade may be secured to the ends of the arms or

blades

2 and 3 in any suitable manner, but are here shown as provided with a screw-bolt 15, which is passed through the ends of the body portion 9 radially and through openings in the ends of the arms or

blades

2 and 3, where they are adapted to engage nuts 16, which are countersunk or inserted in openings therefor' in the sides of said arms or blades.

To one end of the sliding casing 12 is connected the outerend of an arm or brace-bar 17, and to the opposite end of the casing 13 is connected the outer end of an arm or bracebar 18. The inner ends of the arms or bracebars 17 and 18 are pivotally connected and mounted in the corner of the connected ends of the square. The brace-bars 17 and 18 are of such width that they are adapted when folded to lie within the grooves or channels 7 between the edges of the casings 5.

In one side of the body or core 4 are formed a number of recesses, in which are arranged instruments of different varieties, and in the casing 5 over said recesses are formed viewopeiings, whereby the instruments may be rea Near the upper end of the blade 2 is formed a recess, in which is arranged a transverselydisposed spirit-level glass 20. Immediately below the spirit-level 2O is arranged an opening through the blade, and in said opening is arranged an altitude-gage 21. Below the altitude-gage is arranged in the side of the blade a thermometer 22, on a line with which, but in the inner edge of the blade, is arranged a vertically-disposed spirit-level glass 23. the thermometer 22 and level 23 is arranged a 1barometer 24.

Beloyv perpendicular position Will register at 0, but when the blade or square is leaned in one direction or the other the degrees of such inclination will be indicated by the pendulum on the dial.

Near the outer end of the arm or blade 3 and in the side of the same is arranged a vertically-disposed spirit-level glass 27, while substantially midway between the ends of the blade and in the edge of the same is arranged a horizontally-disposed spirit-level glass 28. Near the inner end of the blade 3 and on the side of the same is arranged a socket 29 for the reception of a J acobs staff.

On the edge of the blade 3 and at the inner end or corner of the same is mounted a sur- Veyors rear sight-piece 30, .which is adapted to have a sliding engagement in a socket 31, formed on the blade, whereby the same may be pushed in when not in use. A front sightpiece 32 is arranged near the outer end of the arm 3 to coact with the sight 30 and form a leveling or surveying instrument. The sightpiece 32 is formed in the shape of a springplate, one end of which is iixed to the edge of the blade by a screw or other suitable means, this sight being normally held down against the blade by a slide 33.

When the instrument is to be used for surveying or leveling purposes, the same is inverted to bring the outer edge of the blade 3 up in a horizontal position. A Jacobs staff is then inserted in the socket 29 to support the instrument and the sight-pieces elevated for use. On the outer edge or' the blade 3 is removably secured a mariners compass 34 and oppositely-arranged spirit-

levels

35 and 36, all of which are used in connection with the

sights

30 and 32 to facilitate the leveling and surveying operations when the instrument is used for this purpose.

It will be understood that the compass 34 and

levels

35 and 36 will be removed when the segmental casing is to be extended to permitthe arm or bar 18 to swing outwardly.

The slidable members 12 13 of the blade or segment 8 enable the arms or bars 17 18 to be disposed at any desired angle to enable the instrument to be used when placing timbers at any inclination or at angles other than right angles.

On the sides of the casings of the

blades

2 and 3 opposite to that containing the recesses is arranged the ordinary division-marks indicating inches and fractions oi' inches. On the

sliding casings

12 and 13 are formed two sets of division-marks, indicating both inches and degrees, as shown.

The many uses in which this instrument may be employed and the advantages to be had by arranging in combination the various useful instruments herein described will be readily apparent from the foregoing description taken in connection with the accompanying drawings.

Various changes in the form, proportion, and the minor details of construction may be resorted to without departing from the principle or sacriiicing any of the advantages of this invention.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

1. An instrument oi' the class described, comprising a square, and a segmental blade connecting the outer ends of the arms of the square and having slidable members adapted to be extended beyond the said arms.

2. An instrument of the class described, comprising a square, a segmental core-piece connecting the outer ends of the arms thereof, and segmental casings slidably secured on the said core-piece and thereby adapted to be extended in opposite directions beyond the said arms.

3. An instrument of the character described, consisting of a square, measuring instruments arranged on and carried by the blades oi' said square, a segmental blade consisting of a central body portion, removably secured to and connecting said square-blades, and oppositely-sliding side pieces mounted on said central portion, having means for slidingly holding said side pieces to said central piece and means for holding the same in adjusted positions, substantially as described.

4;. An instrument of the character described, consisting of a square, measuring instruments arranged on and carried by the blades of said square, a segmental blade consisting of a central iianged body portion removably secured to and connecting said IOO square-blades, and side pieces slidably engaging said hanged central portion to move in opposite directions, brace-bars pivotally connected at one end to said sliding side pieces and at their opposite ends to said square, and set-screws arranged to hold said sliding side pieces in their adjusted positions, substantially as described.

5. An instrument of the character described, consisting of a square, the arms or blades of which are formed of an inner core or body portion, and an outer shell or casing, recesses formed in said inner core or body .portion to contain measuring instruments,

view-openings formed in said casings over Said recesses, a segmental blade consisting of a central flanged body portion, removably secured to and connecting said square-blades, and side pieces slidably engaging said flanged central portion to move in opposite directions, brace-bars pivotally connected at one end to said sliding side pieces and at their opposite ends to said square, and set-screws arranged to hold said sliding side pieces in their adjusted positions, substantially as described.

6. An instrument of the class described, comprising a square, a segmental blade con- IOS IIO

nesting the ends of the arms of the square In testimony whereof I have hereunto set and having sldable members adapted to be my hand in presence of tWo subsoribimqV Witextended beyond the arms of the square, and nesses.

arms attached to theends of the said slidable WILLIAM BLAKE TERRY. 5 members and pivotally connected to the Witnesses:

square at the point Where the arms thereof B. S. TILLoTsoN,

meet. I. M. V. BULLooK.