US2185838A

US2185838A - Range rod holder

Info

Publication number: US2185838A
Application number: US288290A
Authority: US
Inventors: William H Duerr
Original assignee: Individual
Current assignee: Individual
Priority date: 1939-08-04
Filing date: 1939-08-04
Publication date: 1940-01-02
Anticipated expiration: 1957-01-02

Description

Jan. 2, 1940. w. H. DUERR RANGE ROD HOLDER Filed Aug. 4, 1939 null INVENTOR WITNESSES v 5 my D m O M m a zvn/ m: w%

Patented Jan. 2, 1940 UNITED STATES PATENT OFFICE '7 Claims.

This invention relates to range rod holders and has for an object to provide a construction which is simple and easy to adjust but which will accurately hold a range rod in a vertical position.

Another object is to provide a range rod holder which may be mounted to swingaround a given point and which is provided with a universal adjustable head to which the range rod is adapted to be clamped.

A further object of the invention is to provide a range rod holder and a stool coacting with the holder provided with a rod supporting arm, whereby a range rod may be held in a vertical position regardless of the angle of the support for demonstration purposes.

In the accompanying drawing Fig. l is a side view of a range rod holder and stool disclosing an embodiment of the invention;

Fig. 2 is a top plan View of the structure shown in Fig. 1; and

Fig. 3 is a front view of the structure shown in Fig. l, the same being illustrated on a reduced scale with the stool shown mounted on an inclined support.

Referring to the accompanying drawing by numerals, i indicates a stool and 2 a range rod holder, while 3 indicates the range rod. In surveying, a range rod, similar to rod 3, is used and to secure accurate results this rod must be held vertical. Various means heretofore have been provided for holding this rod in place but much difiiculty has been encountered in holding the rod 3 vertical when the ground adjacent the same is irregular or at an angle to the horizontal. In the present invention means have been provided which will hold rod 3 vertical regardless of the regularity or irregularity of the ground or other support.

As shown particularly in Fig. 1, the stool l is provided with suitable supporting legs 4 connected to the top piece 5 in any suitable manner. The top piece 5 is provided with an aperture which accommodates a bolt 6 carrying a wing nut 1. For the purpose of demonstrating the device, an arm 8 is secured at 9 and H] to two of the legs 4, so that the outer end ll may project a desired distance from the stool and be held in a given position. The end II is provided with a notch l2 for receiving the tapering end l3 of rod 3. Also a supporting bar I4 is connected with end H and carries a transverse foot l5 adapted to rest on the ground or other support. An arm or body 25 is provided with a longitudinal slot I6, as shown in Fig. 2, which extends from in an arc.

' are carried by the head 23.

near the end H to the end l8 where it merges into a socket I9 having a flaring opening 23. The socket I3 is adapted to receive a ball 2! formed. integral with or rigidly secured to a rod 22, which rod is secured" in any desired manner 5 to a head 23. The head 23 has an opening 2 1 through which the sight rod 3 extends. The body or arm 25 carries a bolt 26 and a win nut 21 which is adapted to be tightened for gripping the ball 2! when head 23 has been properly adjusted. The bolt 5 is adapted to clamp the body 25 firmly to the stool I. It will readily be seen that when nut 'l is loosened, body 25 may be moved longitudinally easily and also swing After body 25 has been moved to a desired position, nut 2'! is tightened and then the head 23 will be held rigidly in its adjusted position. In properly positioning head 23, nut 2! is loosened and head 23 is then adjusted, after which nut 21 is tightened and head 23 locked in its adjusted position. A number of set screws 28 These set screws are preferably provided with knurled heads, whereby they may be easily adjusted by the thumb and finger of the operator to clamp or loosen the 25 rod 3, as the case may be.

When setting the rod 3 in the notch l2, the screws 28 are loosened and the rod is then moved to a vertical position. This position may be ascertained by a spirit level, a plumb, or other 30 means as desired, and then set screws 28 are tightened for holding the rod 3 in the adjusted position. I When the device is used in the field, the body 25 is swung to either side of arm 8 and then rod 3 caused to rest on a mark or depression in the earth or an object carried by the earth. If a surveyor has marked a stone, for instance one that is embedded in the earth, the bar could be adjusted so that point I3 would rest on the cross marks. The rod 3 could then be moved to a vertical position and locked in such position as just described. When the surveyor takes the sight he would secure an accurate reading because of the vertical position of the rod. Usually the lower part of the rod is hidden by grass or other extraneous matter so that the person viewing the rod would see only the upper end of the rod. If the rod should be slightly inclined either to the right or left, the surveyor would probably not notice this fact through the sighting instrument and, consequently, secure a false reading. By providing a universal adjustable means for supporting the range rod 3 in a true vertical position, there can be no error in respect to this rod. After the surveyor had taken down the proper figures after sighting the rod, the stool, rod holder and rod could then be shifted to another position and again adjusted so that the rod would be vertical. The surveyor would then take a second sight and put down the proper figures. This action would be carried out as long as the surveying was continued.

While the stool l is desirable it is not always essential as the holder arm 25 could be mounted on some other kind of a support or even connected to a tree stump or fence and then the head 23 adjusted to hold the arm 3 in a vertical position. After the rod 3 has been arranged in a vertical position the accuracy of the adjustment may be tested by a plumb-bob, spirt level, or other instrument.

I claim:

1. A range rod holder including a body having a slot extending from one end to near the other end, means extending through said slot for adjustably clamping the body in operative position, said body adjacent one end of said slot having a round cavity, a ball fitting into said cavity, a circular head connected with. said ball, means for squeezing parts of said body against said ball for locking the ball against movement, and means carried by said head for clamping a range rod.

2. A range rod holder including a body, means for mounting the body so that the body may have a longitudinal back-and-forth movement and a rotary movement, a rod supporting head, and universally adjustable means for connecting said head with said body.

3. A range rod holder including a body, means for securing the body to a support, a head having an opening through which the range rod is adapted to extend, means for clamping the range rod to said head, and universally adjustable means for connecting said head to said body.

4. A range rod holder comprising a holder body having a slot therein, a clamping bolt extending through said slot for clamping the body to a support, a range rod receiving head arranged at one end of said body, a ball-and-socket structure connecting said head with said body, and a clamping bolt for producing friction in said balland-socket connection to lock the same against movement.

5. A range rod holder comprising a supporting body, a head having an opening adapted to receive a range rod, means clamping the range rod to said head, a ball-and-socket'structure connecting said head with said body, and a clamping bolt for clamping said ball-and-socket structure sufilciently to produce friction for locking the head against accidental movement.

6. A range rod holder including a body, a head adjustably connected with said body, said head having an aperture extending therethrough, and a plurality of spaced set screws carried by said head for clamping and holding a range rod substantially centrally of said aperture.

'7. A range rod holder including a body, a range rod receiving head, means for clamping a range rod to said head, a ball-and-socket structure formed partly of said body and partly of said head, said ball-and-socket structure connecting said head with said body, and a clamping bolt for producing friction in said ball-and-socket structure to lock said head against accidental movement.

WILLIAM H. DUERR.