US852013A - Leveling device. - Google Patents

Description

No. 852,013. PATENTED APR; so, 1907.

H. BROWN. LEVBLING DEVICE.

APPLICATION TILED MAY 31.1906.

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No. 852,013. PATENTED APR. so, 1907.-

H. BROWN.

LEVELING DEVICE. APPLICATION FILED MAY 31. 190g.

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TCQQ "am THE NORRIS FEYERS (0.. wnanmzrum a c HERBERT BROl/VN, OF ROGHFORD, SOUTH DAKOTA.

LEVELING DEVICE.

Specification of Letters Patent.

Patented April 30, 1907.

Application filed May 31,1906. Serial No. 319,595.

To a, whom it nmy concern:

Be it known that I, HERBERT BROWN, a citizen of the United States, residing at Roch'ford, in the county of Pennington and State of South Dakota, have invented certain new and useful Improvements in Leveling Devices, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to improvements in plumb levels for use on engineers transits.

One object of the invention is to provide a simple and practical device of this character which will enable the operator to read angles, run grades, etc., without the use of a templet.

Another object of the invention is to provide a device of this character which may be used as an attachment for an engineers transit to take the place of the usual altitude are and the leveling glass under the telescope, and to enable the operator to read vertical angles without first leveling his telescope.

Further objects and advantages of the in vention, as well as the structural features by means of which they are attained, will be made clear by an examination of the follow ing specification, taken in connection with the accompanying drawings, in which,

Figure 1 is a side elevation of the improved level; Fig. 2 is a vertical transverse sectional view through the same; Fig. 3 is a detail horizontal sectional view; Fig. 4 is a vertical transverse sectional view through the device showing it in the form of an attachment secured upon the telescope axis of an engincers transit and is a detail view showing the clamping arms and their operating screwrod.

Referring to the drawings, the numeral 1. denotes the improved leveling device which, as shown in Fig. 1, is mounted in an opening in a level block or body 2, and, as shown in Fig. 4, upon the telescope axis 3 01' an engineers transit. The level 2 may be of any suitable form and construction, and the device 1 may be mounted in any suitable manner upon or within it. The device 1, as shown in Figs. 1, 2 and 3, comprises a body 4 formed at its center with a transverse opening 5 and at its ends with attaching ears 6, the latter being apertured to receive screws 7 which secure the device in the level 2. The opening 5 is closed at one end by a ring or bezel 8 and at its opposite end by a ring or bezel 9, said rings or bezels being provided with glasses or crystals 10, as shown. The bezel 9 has internal screw threads to engage external threads upon an annular projecting portion 11 of the body 4. The bezel 8 has external screw threads to engage internal threads in the body 4, and between the inner end oi the bezel S and an annular shoulder 12, formed in the opening 5, is retained a dial ring 13 which has its opposite faces graduated in degrees and half-degrees, as shown at 14. This graduated ring or are is adjusted by means of a screw 14' mounted in the upper part of the projecting portion 11 of the body 4 and in an arm 15 projecting outwardly from the ring 13, said screw having its collar held in place by the screw bushing 16, as shown in Fig. 3.

Coat-ting with the graduated dial ring or are 13 is a double vernier in the form of a swinging pointer 17 pivotally mounted intermediate its ends and having its lower end weighted, as shown at 18, and its segmentalshaped upper end bifurcated to receive the inner edge ol the dial ring 13 and to form the two verniers 19, which latter are graduated, as shown, or in any other suitable manner. The weighted end 18 of the body portion 17 of the double vernier causes the latter to hang perpendicular or plumb at all times upon its pivot 20 which is preferably in the form ol a tempered steel shaft. Said shaft has its tapered ends seated in jeweled centers 21 provided in adjusting screws 22, the latter being located in forked brackets or posts 23 which project upwardly or inwardly from the body 4 and the bezel 8. In order to hold the double vernier in any position, clamping arms 24, 25 are provided upon its opposite sides and are adjusted toward and from each other and the body portion 17 of the double vernier or plumb, said arms having upon their inner ends inwardly projecting jaws 26 which are apertured to permit the pivot These arms 24, 25 are adjusted toward and from each other by means of a screw rod 27 which is disposed in alining openings in the body 4 and the bezel S. The rod 27 passes through an opening in adjacent to one end a shoulder 29 to engage said arm. The opposite end of said rod is lormed with screw threads 30 to engage a screw-threaded opening in the other arm 24.

The screw threads 30 are also engaged by a no 20 to pass freely therethrough. loo

the arm 25 and has thumb nut 31 by means of which the screw rod 27 may be operated to adjust said clamping arms. Said rod may also be adjusted by a similar thumb nut 32 upon screw threads 33 at its'opposite end.

The embodiment of the invention shown in Fig. 4 is in the form of an attachment for the telescope aXis 3 of an engineers transit (not shown), and it is very similar in construction and operation to the form of the invention just described. As shown in Fig. 4, a circular plate or head 35 takes the place of the bezel 8 and has at the center of its rear or outer face a screw-threaded socket 36 to re ceive the threaded end of the telescope axis 3. The thumb nut 31 is omitted and the screw rod 27 is adjustable only from its front or outer end by means of the nut 32. The weight carries but one vernier and the body 4 is also preferably made cylindrical in form and smaller, as will be readily understood.

From the foregoing description, taken in connection with the accompanying drawings, it is thought that the construction, use and advantages of the invention will be readily understood without a more extended ex lanation.

arious changes in the form, proportion and the minor details of construction'may be made without departing from the spirit or sacrificing any of the advantages of the invention, as defined by the appended claims.

Having thus described my said invention, what I claim as new and desire to secure by Letters Patent of the United States, is

1. A device of the character described comprising a body, a graduated dial therein, a weighted vernier pivotally mounted to coact with said dial, clamping arms to engage said Vernier, and a screw rod for operating said clamping arms.

2. A device of the character described comprising a body, a graduated dial therein, a swinging indicator to coact with said dial,

weight to coact with said clamps to engage said indicator, and a screw for operating said clamps.

3. A device of the character described comprising a body having an opening therein and means whereby it may be attached to a support, bezels for closing said opening, a graduated dial retained in said opening by one of said bezels, means for adjusting said dial, bearings, a weight pivotally suspended from said bearings, a vernier upon said weight to coact with said dial, and means for clamping said weight against movement, substantially as described.

4. A device of the character described comprising a body having an opening therein and means whereby it may be attached to a support, bezels for closing said opening, a graduated dial retained in said opening by one of said bezels, means for adjusting said dial, bearings, a weight pivotally suspended from said bearings, a vernier upon said weight to coact with said dial, clamping arms to engage said weight, and a screw rod for operating said arms, substantially as described.

5. A device of the character described comprising a body having an opening therein and means whereby it may be attached to a support, bezels for closing said opening, a graduated dial retained in said opening by one of said bezels, a screw for adjusting said dial, bearings, a weight pivotally suspended in said bearings, a Vernier carried by said dial, clamping arms to engage said weight, and a screw rod 7 to operate said arms, substantially as described.

In testimony whereof I hereunto afliX my signature in presence of two witnesses.

HERBERT BROWN.

Witnesses ELI CINDEL, PLUNKETT KURTZ.

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