A Hand Hoist for Raising and Lowering Arc Lamps.
Year: 1895

page_text: Date of Application, 9th May, 1895
Complete Specification Left, 25th Jan., 1896-Accepted, 18th Apr,
1888
A Hand Hoist for Raising and Lowering Arc Lamps.
GEORGE WILSON LUNN of No. 21 Yorkshire Street in Oldham in the County
of Lancaster Engineer doth hereby declare the nature of this invention to be as
follows
Taking into consideration the rapid progress that electric light is making and
the number of are lights or lamps that are being used in the public streets for
lighting purposes it is necessary that something should be done to facilitate the
way for cleansing and restoring carbon without having to resort to climbing ladders
say twenty feet high, which is very risky and dangerous and has often resulted in
accidents.
The object of my invention is to provide improved means for raising and lowering
arc lamps from lamp posts. It consists of a novel construction and combination of
parts such as will be hereinafter described.
My invention is to do away with ladders, by an apparatus in the form of a boist
worked by a vertical screw, the screw working in a nut carrying a sheaved pulley
for the rop to work in. The screw 18 operated on by a handle and bevil wheels
worked from a horizontal shaft working through the cross section of the lamp post.
The remainder of the apparatus 18 fixed in a vertical position in the hollow part
of the lamp post
The nut with a guide rod working up and down raises and lowers
the lamp any distance according to the length of the screw; one end of the rope
being fixed to the frame and the other end being fixed to the lamp.
The same apparatus can be operated on by two screws working either one or any
number of sheaves convenient for the work it has to do. This second arrangement
is more applicable to the trunk of the lamp post; and having a number of sheaves
it requires a much less traverse and is preferable in some cases.
The third arrangement is one screw with a coiling barrel and one sheave. The
barrel is arranged vertically, and the screw works along-s.de of it, carrying with it
a sheave that guides the rope on the barrel. The screw and bariel are pitched or
timed to traverse and coil the rope on the bariel without riding or lapping on any
other part of the rope. This arrangement is also more applicable to the trunk of
the lamp post and takes up a small space only. The barrel, if necessary, might
work horizontally.
All three arrangements are worked by horizontal shaft-work through the cross
section of the lamp post with bevil wheels, and work by a handle turned by
band.
The construction and proportious of my machine or apparatus may be varied or
modified in various ways so long as the principle of my invention is adhered to.
Dated the Seventh day of May 1895

page_text: A Hand Hoist for Raising and Lowering Arc Lamps.
GEORGE WILSON LUNN 21 Yorkshire Street in Oldham in the County of
Lancaster Engineer 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:-
Taking in consideration the rapid progress that electric light is making, and the
number of arc lights or lamps that aie being used in the public streets for lighting
purposes, it is necessary that something should be done to facilitate the way for
cleaning and restoring carbons without resorting to climbing ladders twenty feet
high, which is very risky and dangerous and has often resulted in accidents.
The object of my invention is to provide means for raising and lonering are
lamps from inside the lamp post. It consists of a novel construction and combina-
tion of parts, such as will be hereinafter described.
My invention is to do away with ladders by an apparatus in the form of a hoist
worked by hand. The hoist 18 worked by a horizontal shaft G, Fig 1. The
shaft G works the bevel wheels F, that works the vertical screw A, this screw
working in a nut B carrying a stud P for the sheave C or sheaves or pulleys to
work on, for the rope D or any pliable substance to pass round to the lamp; the
screw is operated on by the handle E, which fits on the end of the square of the
shaft G, working through the cross section of the lamp post H, and through
the frame J. The frame part J is free to work in any position in the hollow part of
the lamp post The nut B with a guide rod I to prevent it from turning round,
and slides up and down with screw A that raises and lowers the lamp any distance,
according to leugth and traverse of the screw A, one end of the rope being fixed
to the frame J, and the other end passing round pully or pulleys up the inside of
the lamp post, and then over one or more pulleys at the top of the post, and is
then fixed to the lamp or coupling for the lamp.
The same apparatus can be worked by two screws A and bevel wheels F, Fig. 3,
working one or any number of sheaves C, & between the screws A on a shaft R
fixed at each end to the nuts B that works in the sciews A, the top sheaves C
being fixed to the frame J, this arrangement is applicable to short traverse and get
long length.
Fig. 4. This arrangement is worked with bevel wheels and one screw A and one
bariel on drum O for the rope to lap on, and is arranged in a vertical position.
The screw A. and barrel on dium O works parallel to each other, the sheave C or
pulley that guides the rope D on the bailel O with screw A is pitched or tuned to
traverse and lap the rope on the barrel without ding or lapping on any other part
of the rope, in any part of the traverse of the screw on the barrel. The barrel can
be fixed in an horizontal position as shown in Fig. 2. The rope D laps direct
on the barrel O and the barrel is fixed on the shaft G, working through the cross
section of the lamp post or pillar H. The ratchet wheel M can be fixed to the
shaft G or barrel O, and the lever L works against the tooth of the ratchet wheel,
aud holds the lamp in its place, and prevents it running back. S is a friction wheel
fixed to the barrel O or shaft G. K is a fiction strap that works in the friction
wheel S, by pressure being put on and taken off by the handle K the lamp can be
lowered as required. The uut N or screw is screwed in the pillar to prevent any
one tampering with shaft G. When the haudle E, Fig. 1, is inserted on the square
end of the shaft G Fig. 2, the screw N is taken out, and when not used N 18
reinserted as shown in Fig. 2. All these arrangements are worked by the horizontal
shaft G.
The construction and proportion of my machine or apparatus may be varied
or modified in various ways, so long as the principle of my invention is adhered to.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is,
1st. The application of a hand hoist in the hollow part or trunk of the lamp post
as described above,
2nd. Hand hoist worked by bevel wheels and screws & coiling barrel as
described above.
3rd. Haud hoist worked by bevel wheels screws and sheaves as described
above.
Dated the 24th day of January 1808.
G. W. LUNN.