Door or Window Hinge with Lubricating Chamber.
Year: 1898

page_text: Date of Application, 26th Sept., 1898-Accepted, 12th Nov., 1898
COMPLETE SPECIFICATION.
Door or Window Hinge with Lubricating Chamber.
I, CARL HAFERKORN, of 41, Merseburgerstrasse, Weissenfels, in the Empire of
Germany, Manufacturer, 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 a door hinge which in consequence of its internal con-
struction is automatically oiled or lubricated whenever the door or window, as
the case may be, is opened or closed. The arrangement is such that only a very
small quantity of oil from the oil chamber reaches the frictional surfaces.
In the accompanying drawings, Figure 1 is a vertical section of such a door
hinge, while Figures 2, 3 and 4 show further modifications of the same.
As shown in Figure 1 the hinge pin 6 enclosed in the tubular casing a, a¹, is
furnished at its upper end with a cone c which closes an oil chamber d provided
in the upper end of the sleeve or casing a. Below the cone c, the pin 6 has notches
or recesses of cuneiform shape f while its lower end is serrated so as to form a
clutch g gearing with the clutch of the lengthening piece h. This lengthening
piece is acted upon by a spring i and is guided by the slot k and the pin fixed
to the casing a¹. When the door is opened the upper part of the hinge casing a
is caused to turn, the pin m fixed thereto turning with it. The latter pin acts
thus on the cuneiform recess f in such a manner that the pin b is prevented from
turning at the same time by the slot k and the pin 1 but is on the contrary
depressed, whereby the cone c discloses the opening in the oil chamber d, until
a new cuneiform notch f comes, below the pin m when the pin b is shot forthwith
upwards by the spring i and closes again the opening in the oil chamber. The
lubricant or oil escaping from such an opening is uniformly distributed by
a spiral groove n formed around the hinge pin 6 over the whole periphery of
the latter. As the serrations of the clutches are cut in such a direction as, to be
contrary to the cuneiform notches, as soon as the door is shut and hence when
the binge casing is turned in an opposite direction to the former, the pin m is
secured in the cuneiform notch f and the hinge pin is caused to turn; the serra-
tions of the clutch g slide downwards i.e. one over the other and are thus dis-
connected from those of the lengthening piece h. so that when the door is closed
the oil reservoir cannot possibly be opened. To prevent the entrance of dust
and dirt in the oil reservoir, the same is preferably closed by a lid or cover o.
This arrangement will be found efficient not only for very fluid oils but also for
other and thicker lubricants, while by altering the cuneiform recesses or notches
the upper end of the hinge pin 5 may be arranged to act as a piston or plunger.
The modification shown in Figure 2 differs from the arrangement of Figure 1
in so far that the oil chamber d is no longer located above the hinge pin b but
is placed by the side of it. To allow, when the door is moved, for the escape of
the lubricant from the oil chamber and for its distribution to the frictional
surfaces of the hinge pin band of the casing a now closed at the top of the por-
tion of the hinge fixed to the door, the pin in the casing fixed to the door frame
is connected at about the middle of its length to a link and to a slotted guide e
connected thereto. This slotted guide e is suitably arranged on tabs belonging
to the lower part a and fixed to the door posts whereby the piston located
CD Q71

page_text: in the lubricating cylinder d is moved up and down when the door is turned to
and from. The cylinder communicates with the frictional surfaces of the door
hinge by means of the opening or duct c¹. Furthermore the cylinderd is pro-
vided at its upper opening which serves at the same time as a feed hole for the
lubricant with a tight cover or lid which is furnished at its outer side with
two small levers o preventing a receding turn of the lid or cover. When the
door and hence the hinge is turned, to which hinge the small cylinder d is fixed,
the small piston is drawn out of the cylinder d in consequence of the some-
what inclined arrangement of the slotted guide e, and the lubricant following
the said piston and drawing the lid or cover likewise with it is fed whenever the
door is moved back in the duct c¹ whence it reaches the frictional surfaces of
the hinge; the lid or cover p offering with its levers -o a certain amount of
resistance to a retrograde motion, the lubricant is compelled to pass through
the duct c. The lid p will follow on so long as there is lubricant in.the
cylinder d. As soon as the latter is empty 'and' requires to be refilled, the levers'o
of the lid or cover 7 are loosened and the lid is removed. According to this
arrangement the lubricant used is liquid fat and it has the advantages that
the lubricant to be fed to the frictional surfaces is constantly held under pressure.
Neither dirt nor dust can find its way to the frictional surfaces of the casing a, the
latter being closed at the top.
Figure 4 shows a modification of the arrangement shown in Figure 2 wherein
the oil reservoir or chamber d is arranged, above the hinge pin b, the former
contains in this case one or more outlet openings which, when the upper
hinge part a is turned, come for a short time above the openings of the groove n
and allow for this time a small quantity of oil to run out.
.
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. An automatically oiled door or window hinge. characterized by the feeding
of a determined portion of the lubricant to the frictional surfaces requiring to
be oiled, which oiling occurs whenever the. door or window is opened or closed
owing to the occasional opening of an oil chamber.
2. A hinge of the kind above claimed, characterized by a hinge pin b depressed
for a short period of time-whenever the door or window, is opened-by means
of wedge shaped recesses or notches f acted on by a pin m in order to uncover
for a short interval the opening of a lubricating reservoir.
96f7
3. A hinge of the kind above claimed, characterized by the arrangement of
a lubricating device the piston of which. is displaced-when the door is moved
by the action of a suitable slotted guide e or the like in such a manner that the
lubricant is fed against the frictional surfaces of the door or window hinge.
4. A hinge of the kind above claimed characterized by an oil receptacle
arranged above the hinge pin b and the bottom whereof. is provided with one.
or more openings which whenever the door is turned-are made to .coincide
with the oil ducts or grooves of the hinged pin and thus allow oil to be fed
thereto.
Dated this 24th day of September 1898.
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CRUIKSHANK & FAIRWEATHER,
Chartered Patent. Agents,
62, Saint Vincent. Street, Glasgow,
Agents for the. Applicant.