Corus OT Chains Carrying Chandeliers and other Lights.
Year: 1885

page_text: Big WUB OF LOS, OF Corus OT
Chains Carrying Chandeliers and other Lights.
I CHARLES GODFREY GUMPEL of Carlton, Burstow in the County of Surrey-
Engineer do hereby declare the nature of this invention to be as follows:-
My invention relates to a friction clutch applicable to sliding rods or tubes or to
cords or chains carrying chandeliers or other lights, so that they can be moved
up or down and that they are held in any desired position without requiring
balance weights. Assuming that the chandelier is suspended by a rod or tube.
sliding telescopically within a stationary tube, I attach to the latter a box or
casing within which there are a pair of wedges shaped on their inner faces to fit
the sliding rod or tube and sloped on their backs, their small ends being downwards
Against the sloped backs of these wedges bear a pair of rollers that are mounted in
a frame which, as well as the wedges is capable of a little vertical movement'
within the box. This frame rests on a spring suitably adjusted to the weight of
the chandelier and above it there are stops in the box that prevent it and the
wedges from rising above a certain distance; there are also stops which prevent
the wedges from descending beyond a certain distance. In lowering the chandelier,"
the wedges which grasp the sliding rod or tube in the first place descend a little
with it and then meeting the stops below them become stationary and the tube
or rod slides between them, and in raising the chandelier, the wedges and rollers
first ascend a little with the sliding rod or tube until they meet the stops above.
them when they become stationary allowing the rod or tube to slide between the
wedges. When the chandelier is let go it is held by the friction of the wedges
resulting from the spring pressure of the rollers on their backs causing them to
grip the sliding rod or tube. To a rod or tube sliding upwards from a pedestal a'
similar arrangement is applied, and also to a cord suspending a chandelier or light,
the wedges grasping the cord, the slack of which may be taken up by being wound
on a spring barrel above. When a chain is used to suspend the chandelier or light
instead of gripping it by wedges embracing it, I apply a bent wedge to the
circumference of the spring barrel on which the chain is wound, this wedge being
pressed against the circumference by a roller mounted on a radius arm which is
}
+
ו!0...

page_text: pressed in one direction by a spring and which as well as the wedge is free to play
a little between stops according as the barrel is turned in the one direction by
pulling down the chain or in the other direction by the volute spring within the
barrel when the chain is slack.
This last described arrangement is obviously applicable when a wire cord or
other cord is used instead of a chain.
ABEL & IMRAY,
Agents for the Applicant.
Friction Clutch for Holding Sliding Rods or Tubes, or Cords or
Chains Carrying Chandeliers and other Lights.
I, CHARLES GODFREY GÜMPEL of Carlton, Burstow in the County of Surrey,
Engineer do bereby 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 :-
My invention relates to a friction clutch applicable to sliding rods or tubes or to
cords or chains carrying chandeliers or other lights, so that they can be moved up
or down and that they are held in any desired position without requiring balance
weights. Assuming that the chandelier is suspended by a rod or tube sliding
telescopically within a stationary tube, I attach to the latter a box or casing within
which there are a pair of wedges shaped on their inner faces to fit the sliding rod
or tube and sloped on their backs, their small ends being downwards. Against the
Bloped backs of the wedges bear a pair of rollers that are mounted in a frame,
which, as well as the wedges is capable of a little vertical movement within the
box. This frame rests on a spring suitably adjusted to the weight of the chandelier,
and above it there are there are stops in the box that prevent it and the wedges
from rising above a certain distance; there are also stops which prevent the
wedges from descending beyond a certain distance.
Fig. 1 is a part vertical section and Fig. 2 a plan looking from below of friction
clutch apparatus according to my invention for holding a sliding rod or tube A
such as might suspend a chandelier or other light, passing if required through a
stuffing box B.
To the rod or tube A. I fit two wedges W against the sloped backs
of which bear rollers R. that are mounted in a frame F which rests by its arms fon
a spring S. These parts are arranged in a casing C within which the frame F with
the rollers R and the wedges W are free to move up and down within limits, the
frame F being stopped above by the cover of the case ☐ and the wedges W being

page_text: stopped below by the tubular boss c which projects upwards from the bottom of
the case C.
In lowering the chandelier, the wedges W which grasp the sliding rod or tube A
in the first place descend a little with it, and then meeting the stop c below them
become stationary and the tube or rod A slides between them, and in raising the
chandelier, the wedges W and rollers R first ascend a little with A until they meet
the stop above them when they become stationary allowing A to slide between the
wedges. When the chandelier is let go it is held by the friction of the wedges
resulting from the spring pressure of the rollers on their backs causing them to
grip the sliding rod or tube.
When the clutch apparatus is applied to a telescopic tube H having a hydraulic
joint the parts are inverted as shewn in Fig. 3.
•
To a rod or tube sliding upwards from a pedestal a similar arrangement is
applied as shewn in section by Fig. 4 and in plan by Fig. 5. It is also applied
to a cord D as shewn in side view by Fig. 6 and in vertical section by Fig. 7, in
which two springs S are shewn. The wedges W grasp the cord D, the slack of
which may be taken up by being wound on the spring barrel E above.
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:-
The construction and use of a friction clutch for holding a sliding rod, tube, or
cord, by means of wedges which are tightened by rollers borne by spring pressure
against their sloped backs, and which are limited in their vertical movement by
suitable stops substantially as herein described.
Dated this 20th day of A vonat 1006
ABEL & IMRAY,
Agents for the Applicant.