IMPROVEMENTS IN LUBRICATORS
Year: 1884

page_text: COMPLETE SPECIFICATION.
"
We ROBERT BAIRD of Glasgow, in the County of Lanark, North Britain, and
CEDRIC RANDAL BOULT, of the City and County of Liverpool, Oil Merchants, do
hereby declare the nature of the Invention for "IMPROVEMENTS IN LUBRICATORS
and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:-
This Invention relates to that class of lubricators known as "Sight Feed,"
although its salient points are also applicable to other forms in which the feed is
not visible.
It will be best understood by reference to the accompanying Drawing which is
a vertical section of a lubricator constructed according to this Invention.
A is the cup which may be of solid metal or have a casing of metal with
openings A¹ and a glass cylinder A inside so that the quantity of lubricant
contained in the cup is readily visible. We do not bind ourselves to the kind of
material of which the cup may be made.
B is the valve with preferably though not necessarily a long pointed extension B¹
which serves to direct the flow of the lubricant when the valve is open, and if the
hole be tapered to fit the extension, serves as an addition to the valve by fitting
close in the hole as a seating when screwed tight down by the screw D. The
valve B has also a stem C screwed at its upper portion C¹ having a milled head C³
which may be recessed to receive the pointed end of the cover screw D by which
the valve can be regulated or fixed.
Upon the screwed portion C¹ of the stem is the block or nut E upon which is
the tapered helical spring F the lower end grasping or secured to the nut E and the
upper end held in the tapered hole of the top cover G of the cup; this spring F
need not of necessity be tapered nor the hole which receives it, but that is found
to be the most convenient form and it is therefore preferably so constructed.
The metal cup A terminates at its lower end in the branch H upon which is the
tube I having openings I' and enclosing the glass sight tube K; the tube I is
screwed at I to fit into the journal-cap or other part where the lubricator is
required or it can be left plain and fitted in, or otherwise secured as found most
desirable.
The action of this lubricator is as follows the cup A is filled with the lubricant
through the opening in cover G, the cap L being removed (unscrewed if made to
screw) for the purpose; the valve B may be kept closed during this operation by
pressing with the finger or otherwise upon the head C³ (or the spindle C may be

page_text: screwed through the nut E until valve B rests on the seat).
When the cup is filled
the cap L is replaced and the amount of opening which it is desired to give to the
valve B is adjusted by the screw D, the spring F having a tendency to lift the
valve from its seat and causing the head C to follow closely the screw D.
The amount of upward pressure exerted by the spring F may be regulated by t
the position of the nut E upon the valve stem C; once this is adjusted it need not
afterwards be touched, even if the valve and spring require to be removed, as for
cleaning etc., unless a change in the consistency of the lubricant or other cause
renders it necessary to alter the adjustment.
"
It will be seen that when the valve B is released by withdrawing the screw D it 1
hangs from the spring F and is free to vibrate with the vibration of the portion of
machinery or whatever the cup may be fixed to; this vibration causes or facilitates
the passage of the lubricant down the valve extension B¹, when it passes in drops
or a stream (according to the amount of lift allowed the valve by the screw D)
through the glass tube K. By this arrangement the flow can be instantly regulated 1
without opening the cup by simply turning the screw D..
Having now described this Invention we claim :——
First. The spring F substantially as and for the purpose set forth and shown.
Second. The combination with the valve B of the adjustable nut E whereby the
position of the valve when released from the control of the screw D is determined 2
substantially as set forth.
Third. As a device for fixing releasing, or adjusting the valve B without removing
the cover G, the combination of the screw D valve stem C, sustaining spring F.
and nut E the whole constructed and operating substantially as described and
illustrated.
Fourth. The combination with a lubricator having a vibrating valve, of the
tube I containing the glass tube K whereby the lubricant passing from the valve-
extension B¹ may be viewed substantially as set forth..
Dated this 12th day of February 1884.
L