US1542055A

US1542055A - Antifriction insert for springs

Info

Publication number: US1542055A
Application number: US610766A
Authority: US
Inventors: Arthur V Gullborg
Original assignee: Individual
Current assignee: Individual
Priority date: 1923-01-05
Filing date: 1923-01-05
Publication date: 1925-06-16
Anticipated expiration: 1942-06-16

Description

A. V. GULLBORG ANTIFRICTION INSERT FOR SPRINGS Filed Jan. 5, 1923 YE [JFK Arthur. Y. Gu/fborg A'DI Patented June 16, 1925.

PATENT creme.

ARTHUR v. someone, or CHICAGO, ILLINOIS.

ANTIFRIC'IION' rnsnnrroasrainss." l

Applicationfiled- January 5, 1923. Serial No. 610,766.

To call whom it may concern:

Be it known that 1., ARrrHUa V. Grmn' BORG, a citizen of the United: States, anda reference being had to the accompanying drawings, and to the numerals of reference marlredthereon,which forma part of this specification.

TlllSlDVGlliZlOIiT'BlLtES to an anti-friction insert for springs and the devices disclosed herein embrace improvements on the devices dlsclosed 1n my co pend-m'g application for patent, Serial 311,548, f led July 17th, 1919.

i It is an ob'ect of the present invention to provide an anti-friction insert for springs of such construction as to exclude dirt and other foreign matter from entrance between the spring leaves and contact with the antifriction members.

It is also an important. object of the pres ent invention to provide an anti-friction insert wherein the anti-friction members are substantially surrounded by raised portions of the retainingmaterial for said members.

A further important object of this invention consists in the provision of a. substantial closure at the outer edges of a space between the retaining material of the insert and the spring leaves.

Other and further important objects of the present invention will be apparent from the disclosures in the specification and the accompanying drawings.

The invention (in a preferred form) is shown on the drawings and hereinafter more fully described.

()n the drawings:

Figure 1 is a fragmentary side elevation showing a typical leaf spring with antifriction inserts embodying the present invention positioned between the leaves thereof.

Figure 2 is a plan view of one form of insert.

Figure 3 is a section on the line 3-3 of Figure 2.

Figures 4, 5, 6, 7 and 8' are plan views each illustrating an arrangement of raised portions or ridges which may be employedin the anti-friction spring insert of this inventlon,

' As: shown on. the drawings:

The anti-frictioninserts of this invention comprisestrips of material 1 which. are of substantially-the same width as the spring leavesibetween which they are to be insorted and the endsof which are preferably formed to conform to. the configuration of the endsof the spring leaves. Said strips of material 1 are preferably formed of pa per,.pulp or other suitable materialwhieli is adapted towear by: attrition, and has imbedded therein or otherwise suitably associatedtherewith a plurality of anti-friction. members: which are relatively hard as com.- pared to the spring leaves and which prefmay comprise hardened steel balls 2. Said balls 2 which are ordinarily of such diaineter'that they project from either side of thestrip. of material 1 in the manner indicated in Figure 3, are adapted when said strip. 1 is placed between adjacent spring leaves to wear initial guideways in the strip of material 1 due to. the movement imparted thereto by the relative movement of saica spring. leaves. Initial guideways formed in the strip of material serve to temporarily retain the anti-friction members or steel balls in a predetermined path of movement and the continued relative m-ovement of the spring leaves soon causes the/balls, which are of harder material than the spring leaves, to wear guideways or grooves there in and thus the positioning of the balls 2 between the spring leaves serves to greatly reduce the friction therebetween and to enhance the free relative movement thereof.

The present invention provides means which are effective in preventing the entrance of dirt or other foreign material between the spring leaves adjacent the strip 1. Means which are provided for this purpose comprise

ridges

3 and 4 which,as shown in Figures 2 and 3, are formed by corrugating the material of said strip so that said ridges extend from the plane thereof on both sides to substantially the plane of or slightly beyond the plane of the extremities of the balls or anti-friction members 2. In the form of insert shown in Figure 2, ridges 5 and .6, similar t the

ridges

3 and 4, are formed in the strip 1 inside the

ridges

3 and 4.

In. Figures 4 to 8 inclusive, I have illustrated various designs and arrangements of protecting ridges similar to the

ridges

3 and 4, Figures 4 and 8 illustrating designs wherein individual balls 2 are surrounded by annular ridges 7 which are connected by continuous ridges 8.

In the forms shown in Figures 5 and 6 substantially peripheral ridges 9, similar to the

ridges

3 and 4, are supplemented by short, discontinuous ridges 10 intermediate the balls 2.

By corrugating the strip 1 to form the arions ridges it is possible to make the same slightly resilient so that they contact the surfaces of adjacent spring leaves, affording a line contact lQQQ-WGQH said surfaces and said ridges which is effective in preventing the entrance of any dirt or foreign material therebetween. The ridges are made of the proper height relative to the diameter of the balls or anti-friction members 2 to afford such a contact with the spring leaves, and while as before stated said ridges are preferably formed by corrugating the strip 1, it is apparent that the same may be formed independently of the strip 1 and affixed thereto in any suitable manner. Vfhile these ridges are primarily employed for the prevention of the entrance of dirt or other foreign material between the spring leaves, it is apparent that they will also effectively act to retain a lubricant for the anti-friction members in association there- With.

I am aware that details of construction and the arrangement of the ridges may be varied without departing from the spirit of my invention, and I therefore do not purpose limiting the patent granted hereon otherwise than necessitated by the prior art.

I claim as my 111vent1on: 1. The combination with a leaf spring, of

strips of relatively soft material positioned between the leaves thereof, relatively hard anti-friction members between said leaves associated with said strips of material, and raised resilient portions on the strips of terial for preventing the entrance of foreign material between the spring leaves.

2. The combination with a leaf spring, of strips of relatively soft material positioned between the leaves thereof, relatively hard anti-friction members between said leaves associated with strips of material, and integral ridges on the strips of material for pre venting the entrance of foreign material between the spring leaves.

3. The combination with a leaf spring, of strips of relatively soft material positioned between the leaves thereof, relatively hard anti-friction members between said leaves associated with said strips of material, and ridges extending from each surface of the strips of material for preventing the entrance of foreign material between the spring leaves.

4-. The combination With a leaf spring, of strips of relatively soft material positioned between the leaves thereof, relatively hard anti-friction members between said leaves associated with said strips of material, and means formed by corrugating said strips of material for preventing thc entrance of forh eign material between the spring leaves.

In testimony whereof I have hereunto subscribed my name in the presence of twe snbscribing witnesses.

' ARTHUR V. GULLBOL'EG. lVitnesses:

CARLTON HILL, OSCAR HARTMANN.