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Publication numberUS871227 A
Publication typeGrant
Publication dateNov 19, 1907
Filing dateJul 26, 1905
Priority dateJul 26, 1905
Publication numberUS 871227 A, US 871227A, US-A-871227, US871227 A, US871227A
InventorsBirger Ljungstroem
Original AssigneeSeparator Ab
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 871227 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

No. 871,227. PATENTED NOV. 19, 1907.




2 SHEETS-SHEET 1- .No. 871,227. I PATENTED NOV. 19, 1907. B. LJUNGSTRUM.



2 snzn'rs snmr 2.

' 22 fl 4A 1 m o g f f 7 V4 E wicbuiui BIRGER LIUNesTRoM, or

-cushion between the spin revolved device and the driving gears to cushion or take up the vibrations.



Patented Nov. 19, 1907.

Application filed July 26. 1905- Serial No. 271.293.

To all whom it may concern:

Be it known that I, BIRGER LJUNosTRoM,

a subject of the King of Sweden, residing at Stockholm, Sweden, have invented a new and useful Improvement in Gearings for Centrifugaland other Machines, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, which form a part of this specification.

W'ith centrifugal and other machines which are rotated at a hi h rate of speed, vibration will arise especially at high speed. This causes a disturbing noise and also the vibrations denote a loss of energy. For instance, if the separating bowl be the object rotated, the vibrations of the bowl are imparted to the spindle and the cooperating gearing causing or tending to cause increasing vibrations with resultant inconvenience and loss of energy.

Generally speaking, my invention consists in interposing a sgi'ing or resilient e of the bowl or In the accompan g drawings, I have shown several embotfiifients of my invention and in all cases I have shown the rotating device as a separator bowl.

In the drawings: Figure 1 is an elevation of a portion of a centrifugal machine, showing my arrangement. Figs. 2, 3 and 4 are elevations showing modified forms of cushioning apparatus. Fig. 5 is a crosssectional e line 55, Fig. 4. Figs. 6 and 7 are elevations showing applications of spur and twisted gearing. Fig. 8 is an elevation artly'in section, showing the application of evel gears.

Speaking first of Fig. 1 a. is the bowl and b the spindle. Upon the spindle b,the worm c is loosely mounted so that it, can turn upon and move along the spindle I).

f is the worm wheel driven in any appro priate manner, not shown. This worm wheel meshes with the worm and rotates in the direction indicated by the arrow. The worm c has a collar or cylindrical extension 9 provided with an inset or notch h. Fixed upon the spindle b is the collar or ring e, ha la notch'j. A spiral spring (1 connects the co in g and collar 0,. one'end of the s ring entering the notch h and the other en the notch 7., The arrangement of the notches and spring is such that in the revolution of the worm wheel, the worm is pressed down, compressing the spring and at the same time the spring connects the worm and spindle so that the spindle is rotated by the rotation of the worm. \Vith this construction the vibrations arising when the bowl is running are absorbed or equalized by the spring, so that the bowl will run more noiselessly and with less loss of power. Further, the spring acts as acoupling between the worm and spindle.

Instead of using a spiral spring, I can use one or more flat springs, as shown in Fig. 2. I can also embody my invention in the form shown in Fig. 3. In this form the worm rotates the spindle positively, but in sliding along it the spring acts, the spring no longer acting as a coupler between the worm and the spindle. This is accoin lished as follows: The spindle is provide with a groove in which a project-ion Zfrom the worm enters. As is self-evident, this arrangement may be reversed by placing the groove in the worm and the projection upon the spindle. In Fi 4 and 5, l have illustrated another embo ent of my invention. In this embodiment, there is a collar or ring an integral with or fixedly secured to the spindle.

The-lower end of the worm c abut-s against the spring fingers n projecting from the ring 0. There are notches n in the worm in which the ends of the fingers 12, rest. The direction of travel of the worm wheel, as indicated by the arrow, is such as to cause the spring fingers to act and if the wheel is nei'er turned in the opposite direction the collar or ring mmay be omitted. The ring 0 has on its interior the projecting pin p, which enters a spiral groove 9 on the spindle.

Up to this point I have described my invention with respect to gears of the type of worm and wormwheel. It is, however, ap-

plicable to the case of other gearing, as appears in the construction shown in Figs. 6, 7, and 8.

In Fig. 6, I have shown the invention applied to c lindrical earings with straight teeth; in i 7 to o indrical gearings with inclined tect 1; in Fig. 8 to bevel gears. In these figures I have given the same letters to corresponding parts as are used with respect to the previous fi ures.


1. In combination, a rotatable device, a driven gear, and a driving gear for the same, one of said gears being mounted to move along its support and a resilient connection between said gear and its support.

2. In combination with a rotatable device, a driven gear and a driving gear, one of said gears being mounted uponits support so as to move around and along said support and a resilient connection between said gear and its support.

3. In combination, a shaft or spindle, a gear mounted to move along said spindle, a resilient connection between said gear and the spindle, and a driving gear meshing with the last mentioned gear.

4.- In combination, a rotating spindle, a

collar, fixed m the spindle there being a notch on the gear and a notch on the co lar and a spiral spring, one end in the gear notch 7 20 i the other in the spindle collar notch.

8th day of July, 1905.




Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2527658 *Mar 20, 1945Oct 31, 1950Harold SinclairTorque limiting means for torque transmitting mechanisms
US3049936 *Jun 20, 1960Aug 21, 1962Deere & CoWorm gearing
US3104989 *Jun 28, 1956Sep 24, 1963Kearney & Trecker CorpMachine tool for removing a mass of material from a container and method
US4742726 *Sep 26, 1986May 10, 1988Siemens AktiengesellschaftArrangement to limit the axial play of a motor-drive shaft mounted with plain bearings
US8307938 *Sep 18, 2009Nov 13, 2012Showa CorporationElectric power steering apparatus
US20100181139 *Sep 18, 2009Jul 22, 2010Showa CorporationElectric power steering apparatus
US20130061704 *May 9, 2012Mar 14, 2013Illinois Tool Works Inc.Enveloping spiroid gear assemblies and method of manufacturing the same
International ClassificationF16H1/16
Cooperative ClassificationF16H1/16, F16H55/14