US574076A

US574076A - Heinrich schlotfeldt

Info

Publication number: US574076A
Authority: US
Publication date: 1896-12-29
Anticipated expiration: 1913-12-29

Description

(No Model.) 2 Sheets-Sheet 1. H. SOHLOTFBLDT.

SPEED INDIGATOR No. 574,076. Patented Dec. 29, 1896.

2 Sheets-Sheet 2.

(No Model.)

H ;SOHLOTFELDT.'

A SPEED INDICATOR.

Patented Dec. 29, 1896.

m; uyllbg 1a: Nonms PETERS co, womumon WASHINGTON, n. c..

U NITED STATES PATENT OFFICE.

HEINRICH SCHLOTFELDT, OF KIEL, GERMANY.

SPEED-INDICATOR.

SPECIFICATION forming part of Letters Patent No. 574,076, dated December 29, 1896.

Application filed March 21, 1896. Serial No. 584,251. (No modelfi Patented in England November 26, 1895, No. 22,607, and in Belgium November 27,1895,N0.118,576.

T0 (LZZ 1072/0722, it mu/u con/corn.-

Be it known that LHEINRIGH SCHLOTFELDT, a subject of the Emperor of Germany, and a resident of Kiel, in the German Empire, have invented a new and useful Improvement in Speed-Indicators, of which the following is a specification, and which has been patented in England by Patent No. 22,607,'dated November 26,1895; in Belgium by Patent No. 118,576, dated November 27, 1895, and in Austria by patent dated February 22, 1896, Vol. 46, page 643.

The present invention relates to speed-indicators in which by rotation of a centrifugal apparatus moving a fluid a gaseous pressure is produced which corresponds to the velocity and is indicated by a pressure-gage.

The novelty of the present invention consists in means hereinafter described and claimed whereby the stuffing-boxes required in similar apparatus are avoided and whereby the measure of the atmospheric pressure 001. responding to a fixed or certain velocity or number of rotations can be exactly regulated.

The invention is shown in the annexed drawings.

Figures 1 and 2 show the exterior view of the apparatus in elevation and in plan, respectively. Fig. 3 is a vertical central section. Fig. 4 is a plan in section on line 4 4 of Fig. 3.

Lis ashaft turningin a vertically-arranged cylinder 0, which shaft is driven by means of bevel-gearingb from the shaft S, the number of revolutions of which is to be indicated. The lower end of the shaft L, which is hollow, carries the centrifugal disk K, through the lateral holes of which the fluid drawn in at the lower end of the shaft L is thrown out. As a liquid mercury is preferable and is contained in a reservoir A and in a float or airvessel 13 in said reservoir, and in the axis'of which a tube R, closed above and open below, is fastened, possessing holes pierced through it into the interior of the float at the upper and lower part of the same. The tube R surrounds a tube a", open above and communicating below with the pressure-gage,

and is connected by means of a passage R with the lower open end of the shaft L, while the reservoir A is connected by means of a passage R with the space in which the disk or body K revolves.

To dispense with stuffing-boxes, the shaft L, having the centrifugal disk K fast upon it and through which the mercury must rise from below, is putvertically into the inclosing cylinder 0, and the remaining space of the cylinder 0 is filled by a cylindrical body D, which fits both within the cylinder and around the shaft.

WVhen the cylindrical disk K is brought into rotation, the mercury is drawn from the float B through the tube R and passage IR and forced into the reservoir A through the passage R By this process the air in the float or air vessel B, the tube r, and the tube 1", leading to the pressure-gage, is exhausted or rarefied. The measure of rarefaction is proportional to the speed of rotation of the disk K. In order, however, to regulate the measure of the atmospheric pressure in B exactly for a fixed number of revolutions, an adj usting spindle or pin H has been added, by means of which the opening of a passage R ,connecting the passages R and R can be adjusted.

When H is raised from its seat more or less,

more or less liquid will run through the passage R and the atmospheric pressure in the float B is lessened more or less.

\Vhat I claim as my invention is- 1. The combination of the liquid-reservoir A, the hollow float B in said reservoir having an attached tube R open at the bottom but closed at the top and having communication with the upper and lower portions of the space within the float, the air-tube arranged Within and open at its upper end to said tube R and having at its lower end provision for connection with a pressure-gage, the cylinder 0 having at its bottom a suction-passage R communicating with the open bottom of the tube R and having above a passage R communicating with the bottom of the reservoir A, the said passages R R having a connecting passage R between them, the centrifugal disk K and its shaft L arranged in the cylinder 0 and havinglateral openings forming communications through the center of said shaft between said passages R R and the regulating-screw H for giving more or less opening to the said passage R", snbsl'andisk, substantially as and for the purpose tially as herein de'seribed. herein described.

2. The combination with the cylinder D A T y i y y and the centrifugal disk K and its shaft L HEILRHJH SOHLOTFELDI' 5 contained Within said cylinder, of the cylin- \Vitnesses:

drical body D filling the space between said A. SOHAPER,

cylinder and shaft above said centrifugal ll. LEIDENFROsT.