Certain Improvements in and connected with Axle Pulleys or Rollers.
Year: 1895

page_text: Date of Application, 4th Apr., 1895-Accepted, 15th June, 1895
COMPLETE SPECIFICATION.
Certain Improvements in and connected with Axle Pulleys or
Rollers.
We, CHARLES SMITH, SONS & Co. LIMITED of Deritend Bridge Works,
Birmingham, in the County of Warwick, Art Metal Workers and Brass Founders,
and EDWIN PERKINS MARLEY, of Deritend Bridge Works, aforesaid, Managing
Director of said Company 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 :-
This invention has reference to axle pulleys or rollers and the bearings of the
same which are used for sash cords and for sliding doors or gates and for other
purposes this invention consisting in providing the said axle pulleys or rollers with
ball bearings constructed and arranged in the manner herein described so that
practically there will be no wear or friction on the axle thus rendering this
invention particularly applicable for the sash cords of heavy windows in schools
public buildings and in other places and for heavy sliding doors or gates.
We will describe this invention by referring to the accompanying drawing on
which Fig. 1 is a side elevation partly in section of an axle pulley and its bearings
and frame with this invention applied; Fig. 2 is a cross sectional elevation of the
same; Fig. 3 shews the axle pulley separately; Fig. 4 is a front and sectional
view of one of the side cheeks of the same separately and Fig. 5 is a cross sectional
elevation illustrating a slightly modified arrangement of this invention.
The same letters of reference indicate the same or corresponding parts in all the
figures of the drawing.
In carrying out this invention we prefer to make the axle al in a piece with the
pulley A (or the axle may, as in other axle pulleys, be made separate from the
pulley and fixed thereto by any convenient means). The ends of the axle a' which
project at the sides of the pulley A are made somewhat conical or inclined as shewn
so as to bear on the two ball bearings one at each side of the axle pulley each ball
bearing consisting of a series of small steel or other hard metal balls say ten in
number at each side of the pulley (although we do not confine ourselves to any
particular number). Each of these sets of balls is arranged in an annular recess
inarked 6 which are formed in the inner sides of each of the side cheeks C¹, C',
concentric with the axle. The conical or inclined parts of the axle a' thus bear
upon the two sets of balls & which latter are supported by the annular recesses
in which they fit in the side cheeks C', C' so that the pulley A will turn very
freely.
In order to enable the axle pulley A to be got into position one of the side
cheeks say that marked C2 has to be made separate (as in other axle pulley
brackets) from the frame E with which the front plate e' is formed. This side
check C is secured to the frame E by two screws marked flf. The other side
cheek C may either, as shewn, be inade in a piece with the frame E or made
separate therefrom. In placing the balls and axle pulley in position in the side
cheeks C C we find it is convenient to hold the combined frame E and
side cheek C in a horizontal position and then place the balls in the annular
groove 6 in that side; the axle pulley A with its axle a' is then placed in position
so that its axle bears on the balls and is there held whilst it is turned upside down
and the other end of the axle inserted in position within the circle of balls d in the
bearing in the other side cheek C² the latter meanwhile being held horizontally.

page_text: Then this side cheek C' is secured to the frame E by screws f¹, ƒ³, as stated
above.
The parts in which are the two circular grooves containing the rings of
balls d may if preferred be made separate from the side cheeks C', C as shewn for
instance by Fig. 5 where each side cheek is made with a separate central plug
marked respectively B¹, B' each of which is screwed into a tapped hole in the side
cheek and forms the annular groove for the balls to bear against. This construction
shewn by Fig. 5 is also very convenient for removing the balls or for placing them
in position.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
1. The combination of an axle pulley or roller having an axle made with
inclined or conical ends, and a frame provided with side cheeks formed with ball
bearings for the axle pulley or roller in any of the ways substantially as set forth
and shewn upon the accompanying drawing.
2. Making the side cheeks of the frames for axle pulleys or rollers with annular
recesses made integral with the side cheeks to contain the balls of the ball
bearings as herein before described and illustrated by Figs. 1, 2 and 4 of the
accompanying drawing.
3. The construction combination and arrangement of parts forming the complete
axle pulley or roller and its frame hereinbefore described and illustrated by Figs. 1,
2 and 4 of the accompanying drawing.
4. The construction combination and arrangement of parts forming the complete
axle pulley or roller and its frame herein before described and illustrated by Fig. 5
of the accompanying drawing.
Dated this 2nd day of April 1895.
CHARLES BOSWORTH KETLEY,
Agent for the Applicants.