|Publication number||US622045 A|
|Publication date||Mar 28, 1899|
|Filing date||May 14, 1898|
|Publication number||US 622045 A, US 622045A, US-A-622045, US622045 A, US622045A|
|Export Citation||BiBTeX, EndNote, RefMan|
|Referenced by (4), Classifications (1)|
|External Links: USPTO, USPTO Assignment, Espacenet|
No. 622,045. Patented Mar. 28, I899. A. HEIN.
SURVEYING OR ASTRONOMICAL INSTRUMENT.
(Application filed May 14, 1698.) Modem 2 Sheets-Sheet I.
WITNESSES we Noam PETERS 120., Pno'mumm wxsnmcwou. n. c.
No. 622,045. Patented Mar. 28, I899.
SURVEYING 0R ASTRONOMIGAL INSTRUMENT.
(Application filed May 14, 1898.)
2 Sheets8heat 2.
w Min WITNESSES imfl 4 YHE NORRIS PETERS cu. wruno-Ln-nc.v WASHINGTON, o c.
llm'r'nn ,TATES ADOLF I-IEIN, OF HAGEN, GERMANY.
- SURVEYING OR ASTRONOMICAL INSTRUMENT.
SPECIFICATION forming part of Letters Patent No. 622,045, dated March 28, 1899. Application filed May 14,1898. Serial No. 680,690. (No model.)
To a whom it may concern:
Be it known that I, ADOLF HEIN, engineer, of Hagen, Vestphalia, in' the German Empire, have invented certain new and useful Im-' provcments in Surveying or Astronomical Instruments, of which the following is a specification.
This invention relatesvto surveying, astronomical, and kindred scientific instruments; and the object of the invention is to provide means for setting the instrument firmly against dislocation when its proper adjustment has been secured.
The invention consists in the combination, with the table of a surveying instrument, of a plumb-rod, a hemispherical head on said plumb-rod, means for pivotally supporting said head adjacent to said table, means on said head for supporting asurveying instrument, a clamping-ring supported on springs above said table, a lever for depressing said clamping-ring into contact with the head, said lever bearing on said clamping-ring at diametrically opposite points of the same, and means for locking said lever in depressed position on said bearing-ring, and, further, in the specific means for supporting and guiding said clamping-ring and for adjusting said,
head relatively thereto for regulating the pressure of the ring on the head, as will be fully described hereinafter and finally pointed out in the claims.
In the accompanying drawings, Figure 1 is a side elevation of a surveying instrument and tripod provided with my improved means for setting the same. Fig. 2 is a sectional View showing the clamping-ring raised from the hemispherical head, and Fig. 3 is a sectional view showing the clamping-ring depressed and lockin g the instrument in the position in which it has been set by the plumb.
Similar letters of reference indicate corresponding parts.
rests at its lower concaved end a pivot-screw s, which is adjustable in the hollow hemi= spherical head a of the pin mb-rod c, said screw serving to regulate the height of the head relatively to the tableA and to the clamping means supported above said table and hereinafter described. At its upper end said screw 8 is provided with a broad head, upon which are supported the telescope d and other parts of the surveying instrument. Above the table of the instrument is guided on pins h a concaved clamping-ring 0, which is provided with an upwardly-extending flange b and supported by helical springs 2' on said pins h. Above said clamping-ring 0 is arranged a lever Z, which is pivoted at one end, at 7.2, toan upright standard supported on the table A. From the other end of the lever extends in downward direction a link 19, which is guided at its lower slotted portion on apin q, fixed in the table A. The lever Z is pro-v vided at each side at points diametrically opposite across the bearin g-rin g with bearingpins m. To the lower end of the link 13 is pivoted a cam-lever a", which is retained through the tension of the springs 2' against the under side of the table A,with the handle dropped normally in the released position of the clamping-ring, as shown in Fig.' 2.
The tripod having been located in the desired spot and the plumb having come to a stop, to set the instrument rigidly in its proper position all. that is necessary is to press the lever r in under the table of the insprings i raise the same, together with the ICC the tripod be changed. By means of the setscrew 8 it is possible to raise or lower the hemispherical head a relatively to the clamping-ring and thereby regulate the pressure to be put on the same when the cam-lever is operated. There are preferably employed four pins h with the corresponding springs i, and these four pins are arranged at the four points of a square or diamond, the forward pin being arranged opposite the link and the rear pin diametrically opposite to the forward pin across the hemispherical head. The bearing-pins m are then located on the lever Z, so that they bear on the clamping-ring at points opposite the side pins h and at points diametrically opposite on the clamping-ring. By the employment of this or an equivalent regular disposition of the pins 7L and springs 1', together with the use ofv the bearing-pins m at proper points, there is obtained a direct downward thrust of the clamping-ring, which firmly sets the instrument in the exact position into which it has been brought by the plumb without the slightest sidewise dislocation.
Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. The combination, with the table of a surveying instrument, of a plumb-rod, a hemispherical head on said plumb-rod, means for pivotally supporting said head adjacent to said table, means on said head for supporting a surveying instrument, a clamping-ring supported on springs above said table, a lever for depressing said clamping-ring into contact with the head, said lever bearing on said clamping-ring at diametrically opposite points of the same, a link extending from said lever, mean s on said table for guiding said link, and a cam-lever pivoted to said link and bearing at its cam portion against said table for locking said lever in depressed position on said bearing-ring, substantially as set forth.
2. The combination, with the table of asnrveying instrument, of a plumb-rod, a hollow hemispherical head on said plumb-rod, a pivot-screw adjustable in said head and supported on a bearing-point on said table,means on said head for supporting a surveying instrument, upright pins on said table, springs on said pins, a clamping-ring guided on said pins, a lever for depressing said clampingring into contact with said head, a link extending from said lever, means on said table for guiding said link, and a cam-lever pivoted to said link and bearing at its cam portion against said table for locking said clamping-ring in depressed position, substantially as set forth.
In witness whereof I have hereunto set my hand in presence of two witnesses.
EDWIN Wmss, IIERMANN BARTUP.
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US2463648 *||Nov 26, 1946||Mar 8, 1949||Joseph W Schultz||Camera head for tripods|
|US2571287 *||Sep 9, 1949||Oct 16, 1951||Alfred H Peters||Leveling device|
|US2600518 *||Aug 18, 1948||Jun 17, 1952||Ruth Norman S||Self-leveling supporting device|
|US4717251 *||Feb 6, 1986||Jan 5, 1988||Cubic Corporation||Elevation measurement in high order surveying|