Year: 1896

page_text: Date of Application, 4th July, 1896
Complete Specification Left, 5th Apr., 1897-Accepted, 8th May, 1897
I, LOUIS DECAMPS, Rue Someleville, Verviers, Belgium, Docteur en Sciences,
do hereby declare the nature of this invention to be as follows:-
The invention consists in a new system of roller bearing in which the causes of
friction and damage incident to similar systems are avoided. The rollers provided.
in a cylindrical cavity for supporting the shaft are separated by rollers of smaller
diameter, which may be called "guide rollers" and are terminated by pivots or
small rollers resting on cylindrical surfaces concentric with the shaft. These
surfaces are formed by turning either in the thickness of the en ls of the bearing when
the guide rollers are terminated by pivots or in the thickness of discs secured on the
shaft when the guide rollers are terminated by little rollers. One of these ends or
discs should be capable of being secured in place at the time of mounting the
bearing so as to permit of the introduction of the rollers. The diameters of the
different cylindrical surfaces which touch each other should be so calculated that
when the shaft in rotating turns all the rollers no sliding will take place throughout
the bearing, of one surface on another or on the cylindrical surfaces supporting
the guide rollers.
1000
W. P. THOMPSON & Co.,
322, High Holborn, London, W.C., Patent Agents for the Applicant.
1, LOUIS DEGAMPS, Rue Someleville, Verviers, Belgium, Docteur en Sciences,
do hereby declare the nature of this invention and in what manner the same is to be
performed to be particularly described and ascertained in and by the following
statement:-
The invention consists in a new system of roller bearings in which the causes of
friction and damage incident to such bearings are avoided.
According to my invention I provide two sets of rollers oue set being of larger
diameter than the other set. The larger rollers are the rollers which fill the space
between the bearing and the rotating shaft, the smaller rollers, which I will here-
after call guide rollers, being located between said large rollers so as to prevent
the same from touching. The guide rollers are terminated by pivots or small
rollers resting on cylindrical surfaces concentric with the shaft.
In order that my invention may be clearly underst od I will proceed to describe'
the same with reference to the accompanying drawing in which
Figure 1 is a transverse section of a roller bearing constructed according to iny
invention.

page_text: Figure 2 is a section on the line Figure 1.
Figure 3 is a transverse section shewing a modification, and
Figure 4 is a section on the line 2 Figure 3.
Like letters of reference denote similar parts throughout the drawings.
A is the rotating shaft, C are the large rollers supporting the shaft, D is the
bush or fixed part of the bearing, G are the guide rollers.
Referring now to Figures 1 and 2 the guide rollers G are terminated by pivots t
which are received in a cylindrical groove p formed concentric with the shaft A in
the end plates secured to the bush. "One of the end plates is arranged to be secured
in place at the time of mounting the bearing as shewn at the right hand of Figure 2
so that the rollers can be introduced.
The action of the bearing is very simple. If the shaft A be rotated in the
clockwise direction the roller C will rotate in the counter-clockwise direction, and
the guide rollers G located between the large rollers will be rotated in the clockwise
direction. The large rollers will roll upon the interior cylindrical surface of the
bush D and will move hodily round the axis in the clockwise direction. The guide
rollers will be supported by their pivots t on the smaller cylindrical surface of the
groove p out of contact with the shaft A, and will roll upon said smaller cylindrical
surface moving bodily in the clockwise direction round the shaft. It will be seen,
therefore, that all the surfaces which are in contact with each other will be moving
in the same direction, and consequently the friction in the bearing will be that due
to rolling only. The diameters of the different cylindrical surfaces should be so
calculated that no sliding takes place between any of the surfaces.
In the modification illustrated in Figures 3 and 4 the guide rollers G are
provided with sleeves T at their ends which sleeves roll upon the largest cylindrical
surface of the groove P. Said groove in this instance is formed in discs secured
to or forming part of the rotating shaft, said dises being maintained out of contact
with the bush D by means of the large rollers C. In this case the shaft and
rollers rotate in the same directions as hereinabove described with reference to
Figure 1. The groove P being rotated with the shaft in the clockwise direction
will cause the sleeves T to rotate also in the clockwise direction, and this is the
same as the direction of rotation of the guide rollers G; hence if the diameters of
the cylindrical surfaces are properly calculated there will be no friction between
the rollers G and the sleeves T.
In order to ensure that the pivots t or wheels T of the guides revolve without
sliding upon the directing tracks in the same manner as a wheel revolves upon a
rail, it is necessary that the diameters of these pivots or wheels and of the said
ways should have their relative dimensions mathematically correct which dimensions
may be calculated as follows:--
Let the diameter
Of the shaft = A
Of the rollers = C
Of the bush = D
Of the guides = G
That of the circumference passing through the axes of the guiding
rollers = b.
That of the pivots of the guides = t.
That of the directing ways of the pivots = p.
That of the circumference passing through the axes of the wheel
guides = B.
That of the wheels of the guides = T.
That of the directing ways of the wheels = P.

page_text: The first modification having the pivot guides placed between the rollers and
the shaft, the directing ways attached to the bush. Then the requisite proportion
will be:-
The rollers C and the ends of the guides G terminate in planes normal to their
axes and are suitably adapted to the cylindrical surfaces. The cheeks of the-
bush D and the bases of the directing ways present in like manner surfaces of the
same radius which take up the former in any small longitudinal displacements.
which the rollers C and the guides G may suffer. The bases normal to the axes
of the rollers C cannot come into contact with the cheeks of the bush nor can the
ends of the pivots nor the faces of the wheels come in contact with the bottom of
the guide ways. The rollers and the guides may be constructed hollow or solid.
Having now particularly described and ascertained the nature of my said.
invention and in what manner the same is to be performed I declare that what
I claim is
1. In a roller bearing the provision of guide rollers between the supporting-
rollers, which guide rollers are maintained out of contact with the shaft and the
fixed part of the bearing, substantially as and for the purpose specified.
2. Roller bearings constructed 'substantially as described with reference to the-
accompanying drawing and operating as specified.
1100
W. P. THOMPSON & Co.,
Of London, Liverpool, Manchester, and Birmingham,.
Pateut Agents for the Applicant.