Improved Means for Lubricating Pulley Axles and Bosses.
Year: 1891

page_text: Date of Application, 26th Aug., 1891-Accepted, 10th Oct, 1891
COMPLETE SPECIFICATION.
Improved Means for Lubricating Pulley Axles and Bosses.
J, RYMER PARKINSON of 29 Denmark Street, South Shields, in the County of
Durham, Master Mariner do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement :-
This invention relates to improved means for lubricating pulley axles and
bosses.
According to present practice I am aware of no special means being employed to
lubricate the axles and bosses of pulleys beyond the common systems of hand
lubrication and as many pulleys are situated in such positions that it is very
difficult and in some cases almost impossible to reach them, the result is that the
axles and bosses become "fired" and rapidly wear out for want of proper oiling
and attention, which necessitates frequent renewals and consequent unnecessary
expense.
My invention has for its object to overcome this difficulty by providing means
whereby the pulley axles and bosses may be to a certain extent automatically
replenished with lubricant without the necessity for daily inspection of the same.
The amount of inspection necessary under my improved system will depend upon
certain conditions hereinafter specified. In full explanation of my invention I will
now refer to the accompanying drawings in which
Figure 1 shows a front sectional elevation of a pulley block fitted with my
improved means for lubrication.
Figure 2 is an end view of one end of the pulley axle or gudgeon or pin and
Figure 3 a prose section of the pulley axle.
Like letters of reference designate like parts in the Specification and drawings.
Referring to the latter, a is a pulley axle or pin shown carrying three
pulleys a, a, a mounted in the ordinary way. Traversing the length of the
axle or pin and inside the same is a hole or channel at which communicates with a
lubricant reservoir a' formed in what is equivalent to a somewhat enlarged axle
pin or bolt head aº.
The reservoir is protected by a door or cap a².
From the main channel at any convenient number of short channels a³ com-
municate with the external surface of the axle or pin at points coinciding with the
points or surfaces of the pulley or sheave bosses requiring lubrication. A split
pin a' may be used to retain the lubricant in the reservoir and channels or by the
withdrawal of the same to allow the lubricant to be run off when required. A
short screw stud or plug might be used for this purpose instead of a split pin.
A small projection a may be forged on the pulley axle or pin designed to fit
into a corresponding recess in the cheek piece of the pulley frame so as to prevent
turning of the axle.
The reservoir being filled with oil or lubricant it fills the channel a* and
channels aand oozes out and overflows the surface of the axle on which the
pulleys are revolving by which means efficient lubrication of these parts may be
ensured and considerable economy in wear and tear effected.
The reservoir may be so proportioned as to ensure a supply of lubricant for a
definite period within which no special attention is requisite but at the expiration
of which it will be known that replenishment is requisite.
Thus not only is the lubricant supplied. in the most efficient manner possible but
great convenience at the same time attaches to the improvement,

page_text: Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is
1. The improved means for effecting the lubrication of pulley axles and bosses
consisting of a main channel a traversing the interior of the axle connected with
the axle's external surface by short channels as and supplied with lubricant from a
reservoir a the several parts being arranged and adapted for use substantially as
hereinbefore described and illustrated in the accompanying drawings.
Dated this 25th day of August 1891.
A. CRAWHALL CHAPMAN,
3, St. Ninholas' Buildings, Newcastle-on-Tyne, Patent Agent for Applicant.