US1055043A

US1055043A - Feed device for grinding-machines for ball-bearings.

Info

Publication number: US1055043A
Application number: US65562411A
Authority: US
Inventors: Carl Albert Hirth
Original assignee: Individual
Current assignee: Individual
Priority date: 1911-10-19
Filing date: 1911-10-19
Publication date: 1913-03-04
Anticipated expiration: 1930-03-04

Description

0. A. HIRTH.

FJ'ED DEVICE FOR GRINDING MACHINES FOR BALL BEARINGS.

APPLICATION FILED 0013.19, 1911.

Patented Mar. 4, 1913 Imam AWE/V5115- OFFICE.

CARL ALBERT BIRTH, OF CANNSTAT'I NEAR S'IUTTGART. GERMANY.

DEVICE FOR GRINDING-MACHINES FGR BALL-BEARINGS.

Specification of Letters Patent.

Application filed October 19, 1911. .Serial No. 655,624.

To all 21 [mm it may concern Be it known that I, CARL ALB RT Hm'rri, a citizen of the German Empire, and residing 'in Cannstatt, near Stuttgart, in the Kingdom ot Wurttemberg, in the Empire of Germany, have invented certain new and useful Improvements in Feed Devices for Grinding-Machines for Ball-Bearings, of which the following is aspecification.

In the grinding of balls for ball bearings by means of ball grinding machines having a number of grinding rills, or grooves, an increase in efiiciency is obtained by feeding the balls to be ground at. a velocity corresponding to that of the grinding disk or surface, instead of at a smaller vclocit as used in the past. I

The invention relates to feed means forball grinding machines, and has for its object to provide means whereby the balls to be ground are fed at a high velocity to the grinding machines, and also to prevent one ball being thrust against the ot er and thereby impair the trueness of the same.

For this purpose my invention consists of improved means for feeding balls to ball grinding machines, comprising an injector n the path of the balls to be fed, and forcing by the injector act-ion each ball separately against and toward the grinding disks, the fluid, as oil, gas, or air, used for the injector action, serving to form a layer between the individual balls and act as a bufi'er to the same.

In the accompanying drawing, the figure shows a vertical, axial section of my improved device as applied to a guiding means of well known construction,

Referring to the drawing, the feed or guiding means i is supplied with balls for ball bearing purposes, and seats on a member m which is provided with a lateral tube '11,, which is adapted to feed any suitable fluid, as air, gas, oil, etc which fluid is under pressure. The guiding means 2' has secured thereto and supported thereby a central guide tube'd which has its lowest end tapering, as shown by r, and this guide tube (Z serves to guide the balls from the guide I l l j fluid fed through the member 2'. Contiguous with the tapering end 1* of the guide tube (Z a. member a is provided which is suitably supported in position so that its tapering bore t serves as a guide for the fluid entering the tube n. The

' tapering b'ore t, being arranged much like the well known injector, serves to give the tube a a constantly increasing velocity. The space between the lowest end of the tapering bore (Z and the tapering bore f is such as to cause the rapidly moving fluid to draw from the tube 1], the balls and force them forwardly into the guide or feed tube a at substantially the same velocity as that of the fluid.

The arrai' gement described permits a high velocity of the balls to be obtained by a very simple and by comparatively little space An especially advantageous feature is that layers of fluid are provided, which act like bufl'ers or cushions and prevent an injurious contact of the balls.

As a serviceable fluid, not alone gasor steam may be used, but also air or oils, or any fluid acting to cause an injector action, and serve as a means for preventing the balls from being forcibly impinged againsteach other.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. A feed device for ball grinding ma chines, comprising a guide tube for the balls. a member having a tapering bore for guiding the balls, and means drawing the balls out of the guide tube by an injector action.

Patented Mar. 4, 1 91 2,111 combination with a feed member, a

guide tube supported thereby, having atapering lower end, a member having a tapering bore surrouinling the tapering end of the guide tube, a feed tube at the lower end of the tapering bore, and means for forcing fluid between the wall of the tapering bore and the tapering end of the guide tube for imparting to the balls drawn out of the guide tube and conducted to the feed tube, a velocity substantially equal to that of the fluid.

3. A feed-device for ball-grinding marated balls, which layer acts as a cushion l0 chines, comprising means for guiding a p111- therebetween. rality of balls, and injector-acting means In testimony, that I claim the foregoing adapted to receive said balls from said as my invention, 1 have signed my name in guiding means and impart velocity thereto. presence of two subscribing witnesses.

4.. A feed-device for bal1grinding Ina- CARL ALBERT HIRTH. chines, comprising means for guiding a plu- Witnesses: rality of balls spaced apart, and meansfor' PAULINE KLAIBER, confining a layer of fluid between the sepa- PAULmE'MfiLLER.

Copies-of this patent may be obtained for five centseach, by addressing the Commissioner of Batents.

* Washington, D. C.