Improvements in Appliances for Setting Up or Taking Down Electric Incandescent Lamps.
Year: 1889

page_text: Date of Application, 13th July, 1859
Complete Specification Left, 14 h Apr., 1290-Accepted, 17th May, 1890
PROVISIONAL SPECIFICATION.
Improvements in Appliances for Setting Up or Taking Down Electric
Incandescent Lamps.
We, The Honourable HENRY DUDLEY RYDER, of 59 Strand in the County of
London and HENRY EDWARD DOPSON of High Ashurst in the Parish of Mickleham
in the County of Surrey Carpenter do hereby declare the nature of this Invention to
be as follows:-
The object of this Invention is to provido a convenient appliance by which electric
incandescent lamps can be placed into or taken from sockets situated at a distance
from the ground without its being necessary to use trestles or ladders or like means
for enabling a workman to get close up to the socket, and to be able to do this whether
the sockets are simply suspended and free to swing to and fro or whether they are
carried by fixed brackets or supports.
Ordinarily an electric incandescent lamp is formed externally of an egg shaped glass
globe with a cylindrical neck standing ont from it, and the conductors passing from
the ends of the filament of the lamp are carried through the interior of the neck to
two insulated contact plates at the end. The neck is adapted to fit into a tubular
socket and is retained in the socket by pins which project out from its sides entering
slots in the sides of the socket. These slots are formed to pass for a distance length-
wise of the socket from its lower edge and then at right angles to its length. When
therefore the pins on the neck have been inserted into the mouths of the slots, the
neck has to be pushed upwards into the socket and a partial turn then given to it to
cause the pins which project from its sides to enter the parts of the slots which are at
right angles to the length of the socket. When the ſamp is held in the socket, the
two contact plates at the end of its stem bear against two springs to which the
conductor for conveying current to the lamp are coupled so that the necessary
contacts are made simply by inserting the stem of the lamp into the socket. In order
to enable an attendant to so place the stem of an electric incandescent lamp into the
socket which is to hold it without the attendant having to get into close proximity to
the socket we provide a holder within which the glass of the lamp can be held and be
retained by friction to some extent from turning therein. The holder we form
preferably of a cup shaped receptacle of the same internal diameter as the upper third
of the glass of the lamp-this receptacle is padded on the inside with soft material
preferably with india rubber.
The holder we also form with three or more spring fingers projecting from its rim
and curved to allow of their readily adapting themselves to the upper part of the glass
of the lamp. These fingers being of spring material can readily be sprung apart
from one another to allow of a lamp being passed between them as it is being placed
into or taken out from the holder.
The holder we carry at the end of a wooden rod which may be extended to any
desired length by screwing extra lengths into it. When a lamp has been placed
within the holder it can by the rod be lifted up to a socket and then by pushing the
rod upwards the stem of the lamp can be pushed up into the socket and whilst being
so pushed up a partial turn can be given to the rod and the lamp thereby caused to be
turned in a direction to lock the stem of the lamp into the socket, because when the
rod is so pressed upwards the friction between the cup holder and the lamp will be
When the lamp has
sufficient to cause the lamp to turn when the rod is turned.
been put into place the rod may be drawn straight downwards thus leaving the lamp
held in the socket.
When the apparatus is to be used for putting lamps into or taking them from
suspended sockets which can swing to and fro or which can readily be lifted upwards

page_text: we form the rod that carries the holder with a slide upon it just below the holder.
To the slide we joint two curved fingers which pass up on two opposite sides of the
holder and which above the bolder are curved towards one another so that their ends
may be made to grasp and hold between them the socket into which the stem of the
lamp is to be inserted.
The fingers are prolonged beyond the axis on which they turn and their ends are
made to diverge one from the other and are coupled by spring connections with a
wire which is carried downwards along the rod. By drawing down the wire whilst
the fingers are grasping the socket the fingers can be made to grip the socket tightly
whilst at the same time the rod carrying the lamp holder can be pressed upwards and
the lamp stem forced into the socket. The wire at its lower end inay be coupled to a
slide which can be slidden up and down on the rod and which carries a spring catch
which when the slide is drawn downwards and the rod pressed upwards may catch
over ratchet teeth on the rod so as to prevent the rod from descending. When this
has been done a partial turn may be given to the rod and the lamp so caused to bo
locked in the socket. The latch can then be released and the holder drawn away
from the lamp. If in place of the lamps hanging downwards from the sockets they
stand up from them or if the sockets are set in an inclined position suitable modifica-
tions may be made in the apparatus to allow of its being used for setting up the lamps
or taking them down.
1
T1000
CARPMAEL & Co.,
Agents.
COMPLETE SPECIFICATION.
Improvements in Appliances for Setting Up or Taking Down Electric
Incandescent Lamps.
We, The Honourable HENRY DUDLEY RYDER of 59 Strand in the County of London
and HENRY EDWARD DOPSON of High Ashurst in the Parish of Mickleham in the
County of Surrey Carpenter do hereby 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 :-
The object of this Invention is to provide a convenient appliance by which electric
incandescent lamps can be placed into or taken from sockets situated at a distance
from the ground without its being necessary to use trestles or ladders or like means
for enabling a workman to get close up to the socket, and to be able to do this whether
the sockets are simply suspended and free to swing to and fro or whether they are
carried by fixed brackets or supports.
Ordinarily an electric incandescent lamp is formed externally of an egg shaped glass
globe with a cylindrical neck standing out from it and the conductors passing from
the ends of the filament of the lamp are carried through the interior of the neck to
two insulated contact plates at the end. The neck is adapted to fit into a tubular
socket and is retained in the socket by pins which project out from its sides entering
slots in the sides of the socket. These slots are formed to pass for a distance length-
wise of the socket from its lower edge and then at right angles to its length. When
therefore the pins on the neck have been inserted into the mouths of the slots, the
neck has to be pushed upwards into the socket and a partial turn then given to it to
cause the pins which project from its sides to enter the parts of the slots which are at
When the lamp is held in the socket, the
right angles to the length of the socket.
two contact plates at the end of its stem bear against two springs to which the
conductor for conveying current to the lamp are coupled so that the necessary
contacts are made simply by inserting the stem of the lamp into the socket. The
In order to
appliance is also applicable for screwing lamps into screw sockets.
enable an attendant to so place the stem of an electric incandescent lamp into the
socket which is to hold it without the attendant having to get into close proximity
to the socket we provide a bolder within which the glass of the lamp can be held

page_text: and be retained by friction to some extent from turning therein. The holder we form
preferably of a cup shaped receptacle of the same internal diameter as the upper third
of the glass of the lamp-this receptacle is padded on the inside with soft material
preferably with india rubber.
The holder we also form with three or more spring fingers projecting from its
rim and curved to allow of their readily adapting themselves to the upper part of
the glass of the lamp. These fingers being of spring material can readily be sprung
apart from one another to allow of a lamp being passed between them as it is being
placed into or taken out from the holder.
The holder we carry at the end of a wooden or bamboo rod which may be
extended to any desired length by screwing extra lengths into it.
When a lamp
has been placed within the holder it can by the rod be lifted up to a socket and
then by pushing the rod upwards the stem of the lamp can be pushed up into the
socket and whilst being so pushed up a partial turn or several turns can be given to
the rod and the lamp thereby caused to be turned in a direction to lock the stem of
the lamp into the socket, because when the rod is so pressed upwards the friction
between the cup holder and the lamp will be sufficient to cause the lamp to turn
when the rod is turned. When the lamp has been put into place the rod may be
drawn straight downwards thus leaving the lamp held in the socket.
Figure 1 of the drawing annexed is a side elevation and Figure 2 a vertical
section of the lamp holder and part of the rod by which it is carried. Figure 2* is
a vertical section of the lamp holder with a lamp held within it.
B a screw
A is the rod which may be of bamboo or other like material.
socket piece of metal secured to its upper end. Cis the cup like receptacle of the
holder with a screw stem projecting from it at the bottom to screw into the socket B.
D is a binding screw by which the screw stem can be locked and prevented from
turning when it has been screwed into its place in the socket. E, E, E are three curved
steel springs projecting upwards from the mouth of the cup-their lower ends are
received in recesses in the cup and are held there by screws E' passed through them
and through the side of the cup and screwed into nuts E³, or the springs might be
secured to the cup in other suitable way. Outside the springs is a covering of soft
wash leather as shown. F is a soft hollow elastic ring around the interior of the
mouth of the cup-the ring is formed with fabric descending from it which can be
fixed by cement to the sides of the cup. The dotted lines G in Figure 1 shew a lamp
held within the holder.
When the apparatus is to be used for putting lamps into or taking them from
suspended sockets which can swing to and fro or which can readily be lifted upwards
we form the rod that carries the holder with a slide upon it just below the holder.
To the slide we join two curved fingers which pass up on two opposite sides of the
holder and which above the holder are curved towards one another so that their ends
may be made to grasp and hold between them the socket into which the stem of the
lamp is to be inserted.
The fingers are prolonged beyond the axis on which they turn and their ends are
made to diverge one from the other and are coupled by spring connections with a
wire which is carried downwards along the rod. By drawing down the wire whilst
the fingers are grasping the socket the fingers can be made to grip the socket tightly
whilst at the same time the rod carrying the lamp holder can be pressed upwards and
the lamp stem forced into the socket. The wire at its lower end may be coupled to a
slide which can be slidden up and down on the rod and which carries a spring catch
which when the slide is drawn downwards and the rod pressed upwards may catch
over ratchet teeth on the rod so as to prevent the rod from descending. When this
has been done a partial turn may be given to the rod and the lamp so caused to be
ocked in the socket. The latch can then be released and the holder drawn away
rom the lamp.
An apparatus constructed in the above manner is shown at Figures 3, 4, 5 and 6.
Figure 3 is an elevation of the apparatus on a small scale. Figure 4 is an elevation
L larger scale of the upper part of the apparatus. Figure 5 is a longitudinal

page_text: section through the line a, b Figure 4, and Figuro 6 is an elevation of the rack and
slide at the lower part of the rod.
In these figures A is the rod. B the lamp holder carried at its upper end in the
manner previously shown. Ca tube capable of sliding freely along the rod. D are
two curved fingers jointed by a pin D' to the tube C-the way in which we shape the
upper ends of these fingers is shewn in plan view at Figure 7. The fingers are as
shewn prolonged below the pin D¹ and their lower ends are jointed to the ends of a
curved spring E-this spring tends to move the lower ends of the fingers and
consequently their upper ends also away from one another. The spring at its centre
has a dovetail projection F from it entering a slot in the tube C so that the centre
of the spring is held to the tube but yet can be moved somewhat away from the pin D'.
At its lower
F is a rod jointed to the spring and extending downwards along the rod.
end it is jointed to a tube through which the rod A passes freely. His a tube
having ratchet like teeth all around it and fixed to the rod between the rod and the
tube G. I is a spring catch carried by the tube G and which can engage with the
ratchet teeth. The catch allows the tube G to be drawn downwards along the rod A
but not to be moved upwards unless the catch is first released by pressure applied to
its tail end. J in Figure 4 is an electric lamp about to be taken hold of by the lamp
holder. K is the socket in which the lamp is held. K' is a flange surrounding the
socket.
The upper ends of the fingers are as shewn first made to embrace the socket above
the flange K. The man using the apparatus then with one hand holds down the
tube G thereby drawing downwards the spring E and causing the upper ends of the
With the other hand the man then pushes
fingers D to firmly embrace the socket K.
upwards the rod A causing the springs of the lamp holder to be pressed against the
glass lamp and the springs then yielding the lamp holder is carried upwards until the
soft internal padding which is around the interior of the mouth of the cup comes against
the glass. The lamp being now firmly held in the lamp holder the man continues to
hold the tube G in one hand and with the other he turns the rod A so as to release
the lamp from its socket. If in place of the lamps hanging downwards from the
sockets they stand up from them as is often the case in chandeliers or if the sockets
are set in an inclined position suitable modifications may be made in the apparatus to
allow of its being used for setting up the lamps or taking them down.
Figure 8 shows how the upper end of the apparatus shown at figures 3 to 7 may be
modified to adapt it for taking hold of lamps which stand upwards from their sockets.
If the arms which carry the lamp sockets are not sufficiently firm to allow of the
lamp holder B being drawn downwards on to the lamps the upper end of the rod F
may be coupled to a tube L as shewn which can be slidden endwise along the rod,
and this tube may have an arm L' with a swivel jointed piece L² at its end which can
be brought against the under side of the arm and made to support it whilst the lamp
holder is being drawn downwards to make it embrace the lamp.
Having now particularly described and ascertained the nature of our said invention
and in what manner the same is to be performed we declare that what we claim is :-
1. A friction clip holder for electric incandescent lamps carried at the end of a rod
substantially as described to enable such lamps to be readily put up or taken down.
2. The construction of the friction clip holder substantially in the manner herein
before described.
3. The construction of apparatus for putting up or taking down electri
incandescent lamps substantially as herein before described with reference t
Figures 3 to 8.
H. D. RYDER.
H. E. DOPSON.