Year: 1887

page_text: Date of Application, 12th Aug., 1887
Complete Left, 12th May, 1888
Complete Accepted, 15th June, 1888
Material.
I, REGINALD HADDAN of the firm of Herbert & Co., Patent Agents, of 67 Strand,
London, in the County of Middlesex, Civil Engineer, do hereby declare the nature of
this invention, a communication to me from abroad by Moritz Lindner of Meuselwitz,
in the Empire of Germany, Manufacturer, to be as follows:-
?
This invention consists in certain improvements in lubricators having for their
purpose a simple and effective automatic lubricator in which solid greasing material
may be used.
For this purpose a suitably weighted piston is caused to operate in a cylinder or
receptacle containing the grease, and having the usual outlet communicating with
the object to be lubricated. The piston preferably consists of a piston face adapted to
the shape of the receptacle and carrying upon it a box with slightly conical or tapered
sides, narrowing towards the bottom, said box serves to contain shot or. other means
for weighting the piston-Flat, spiral, or other springs are attached to the upper
edge of the receptacle and ride upon the sides of the box of the piston, or vice versa
said springs are attached to the piston or box thereon and ride on the rim of the
receptacle.
The grease compressed by the weight of the piston is pressed out of the receptacle,
as however the receptacle becomes emptied the proportion of the weight of the piston
to the resistance of the grease increases.-This is however counteracted by the spring
pressure which arriving on the broader part of the box as the piston descends,
gradually interposes an increased resistance to the fall thereof.
;.

page_text: Material.
I REGINALD HADDAN of the firm of Herbert & Co., Patent Agents, of 18 Buckingham
Street, Strand W.C., London in the County of Middlesex, Civil Engineer do hereby
declare the nature of this invention, a communication to me from abroad by Moritz
Lindner of Meuselwitz in the Empire of Germany, Manufacturer 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 lubricators adapted to automatically feed a solid or viscid
greasing substance.
The improvements consist in a weighted piston brought to press upon the grease in
the lubricator the weight of said piston being continually opposed by spring pressure
whether frictional or tensional increasing in proportion to the decrease of resistance of
the grease as the reservoir of the lubricator is gradually exhausted the object being to
secure an uninterrupted and equable feed of the grease.
To this end the invention consists in the combination of devices shown in the
accompanying drawings and hereinafter described and fully pointed out in the
claims.
Referring to the accompanying drawings
Fig. 1 is a vertical central section of the improved lubricator shown attached upon
a bearing the piston being in its lowest position.
Fig. 2 is a section on line P P of Fig. 1.
Fig. 3 is a similar vertical central section (part in elevation) of the lubricator but
with piston in its upmost position.
Fig. 4 is an elevation of the whole.
Fig. 5 illustrates a modification in the spring device the piston being in its lowest
position.
Fig. 6 the same, with piston in its highest position.
Fig. 7 illustrates a modification in the manner of attachment of the springs.
Fig. 8 section on line T T thereof.
Fig. 9 the said modification the piston being in its highest position.
The same or similar reference letters indicate like parts throughout the figures.
Z is the reservoir of the lubricator preferably of cylindrical form it is closed above
by the cap D having an orifice therein corresponding in shape to the box A but
larger than said box, B is the piston of usual construction sliding in Z and pressing
the grease therein to the outlet. Upon said piston B is placed or fixed the box A
this may have any prismatic shape but is preferably circular and either cylindrical
or slightly conical the narrower part being below and the larger diameter above.
The box A may be provided with a cap and into this box is placed a sufficiency
of heavy material such as shot by which the weighting of the piston is performed.

page_text: To restrain the action of the piston B in a gradually increasing measure as it
descends, springs such as a b or d may be used.
Springs a and b are applicable to the modifications having boxes A of inverted
conical form, the spring d is applicable both to conical and cylindrical boxes A. .
Referring to Fig. 1 the springs a are affixed to the interior of the reservoir Z
or to the cap of the same in such a manner as to bear upon the side surface of the
box A. When the piston is highest, the diameter of the box A exposed to the
pressure of the springs is least and consequently friction of said springs on said
surface also least, as the piston descends however exhausting the grease from the
reservoir, the diameter of the box exposed to the springs continually increases and
the retarding friction of the springs increases in corresponding measure thus com-
pensating for the decrease in the resistance offered by the grease in the reservoir.
The springs a may be two or more in number and arranged equidistant around the
box A.
In the modification shown in Fig. 5. a spiral spring b, secured to the cap or
upper end of the lubricator reservoir, passes about the box A. this spring takes the
place of the springs a abovementioned but its manner of operation is substantially
similar to those. In the modification shown in Figs. 7 to 9 springs d are attached
to the box A or to the piston B and press upon the rim f. of the cap of the
reservoir Z or into recesses in said rim (Fig. 8), the springs being so shaped as to
offer an increased pressure against said rim as the piston descends.
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
1 claim is,
In grease feed for lubricators,
1. The combination in a receptacle of a piston adapted to feed the grease by
pressure of gravity of said piston, with springs for interposing on said piston a
retarding pressure increasing as the piston descends for the purpose set forth.
2. The combination in a receptacle of a piston adapted to feed grease by a constant
pressure applied to such piston with springs for gradually interposing on said piston
a retarding pressure increasing as the piston advances for the purpose set forth.
3. The combination in a receptacle with piston B having a box A thereon of
inverted conical form of springs or spring stationary on said receptacle and operating
with pressure on said box substantially as illustrated and described..
4. The combination of a reservoir Z having thereon a rim fa piston B having a
box A thereon and spring or springs stationary with regard to said piston and box
and guided on said rim f substantially as and for the purpose set forth.
Dated this 12th day of Play 1000.
HERBERT & Co.,
18, Buckingham Street, W.C., London,
Agents to Applicant.