Year: 1887

page_text: I WALTER HENRY BULPITT trading as Bulpitt & Sons Camden Street, Birmingham
in the County of Warwick Lamp Manufacturer do hereby declare the nature of
my said invention and in what manner the same is to be performed to be
particularly described and ascertained in and by the following statement:-
This invention has for its object improvements in lamps, but which are specially
suitable for bicycles on account of their capability of contraction into a small space so
as to pass between the spokes of the wheels so as to hang upon the axles thereof. For
many years lamps have been made with more or less success for the above named
purpose but in the case of very straightened positions such as the one named inside
Bicycle or other similar wheels a small gain in the power to contract is of very great
importance as also the ease with which the door may be operated so as to give atten-
tion to the inner parts of the lamp. These lamps are specially suitable for burning
light volatile oils such for instance as Petroleum but other oils may also be used.
In order that my invention may be clearly understood and more easily carried into
practice I have appended hereunto three sheet of drawings upon which are twenty one
Figures shewing the various details or modes of construction and means of operating
the lamps.
Figure 1 is a side elevation of the lamp closed up as it would appear when attached
to the axle of the Bicycle which is shewn in section.
.
Figure 2 is a front elevation of the lamp in the same position and condition as in
Figure 1.
Figure 3 and 34 are a broken off section through the upper or pivot part on
line A B and a longitudinal section of one side of the bush and the axle broken off.
Figures 4 and 5 are end view and plan of a bearing or bush such as may be securely
attached to the axle of the wheel and upon which the lamp would hinge.
Figure 6 is an end elevation of the oil reservoir and burner when removed from the
case.
Figure 7 is a plan of the burner and oil reservoir which further illustrates the mode
of admitting the air for combustion.

page_text: Figure 8 shows a similar lamp to Figure 1 but with the door opened so that the
lamp occupies less space edgewise.
Figures 9, 10 and 11 illustrate a plan by which the door may be quickly separated
from the body of the lamp though normally hinged thereto.
Figures 12, 13, 14 and 15 illustrate another mode by which the door may he
quickly separated from the body of the lamp by the special kind of hinge there
illustrated and which will be hereafter more fully explained.
Figure 16 is a broken off side elevation or diagram of a lamp having a sliding door
in its closed condition.
Figure 17 is a broken off front elevation of the same lamp as Figure 16.
Figures 18 and 19 are broken off side elevation and front elevation of the lamps
Figures 16 and 17 but with the door opened as will be hereafter explained.
Figure 20 is a cross section on line C. D. shewing the manner in which the door is
closed to the body.
Figure 21 is a plan of the bottom of the lamp inverted.
In carrying out my invention I prefer to first fix to the bicycle axle H the liner F
shewn in end elevation and plan by Figures 4 and 5 by means of screws passed through
the ears and F. This outside journal or casing may carry the antifriction
balls, G. G, or it may be plain. The top casing E of the lamp body E is fitted with
a door E which opens as shewn by the dotted lines in Figure so that the lamp
may be hung over the said journal in such a manner that the springs e³ bear
upon the bush with a slight pressure just sufficient to prevent shake and rattle.
Figure 3 shows the internal flanges and which form the journal of the casing E¹
and flanges f³ and steady in side-ways. It will thus be seen that the casing or
liner F may be easily renewed or taken off and that the lamp is very simply
attached thereto. The door 2 when closed is secured by the lip k¹ upon the lamp
door K which shuts against it where it is locked by the nose spring ², or a
separate spring may be used to lock the door E2 so that it may be independent of the
main door K. The door K opens downwards upon the hinge into the position
shewn by Figure 8 so that it may be passed between the spokes of the wheel and this
is accomplished without interfering with the upper casing E or F which is a great
advantage over many lamps now in use. The burner and oil reservoir M is easily
slided into the lamp when the door is open and the shank of the screw m³ passes along
a slot cut in the side of the lamp casing E which is covered by the guard plate m
upon the lamp. The ventilation is accomplished on the principle of my Previous
Patent No. 433 A.D. 1881 by the air entering under the bottom through the holes shewn
at Figure 21 and also through the side perforations ef of which there are similar ones at
the back. The air cannot pass directly up the lamp but must lap round the oil
reservoir and over the top into the space m³ where it issues in fine jets through the
holes m in the battle plate me. The burner I prefer to use for the light volatile oils
is the one shewn and previously Patented by me No. 2942 A.D. 1885. The Figure S
before referred to as shewing the lamp Figure 1 with its door K open is used to
illustrate the hooks N which may be made of steel or other spring for supporting the
lamp upon the bush F or upon the axle itself. There may be one broad hook or a
number say two or more narrow ones. It will be noticed that the glass case K* of the
door K turns completely out of the way when the door is open. I may meet the
difficulty of contracting the lamp into a small space by taking the door off at the hinge
as shewn by Figure 11 where it is removed by first turning up the guard then
sliding the door K Figure 9 off the pivots & Figure 11. I may mention that the
hinge shewn at Figures 1 and 2 is of the ordinary kind and not removeable. There
are many ways of removing the door at the hinge by special hook formations such for
instance as that shown by Figures 12 13, 14 and 15 where the special sockets P are
fixed upon the bottom to receive the special hooks P1. It will be noticed in the part
section Figure 15 that by turning the door under the bottom that the hooks will slide
over the flutes of the pivot p² whereas the round edges form a journal or pivot when
in the positions shown by Figures 13 and 14.
The views Figures 16, 17, 18, 19 and 20 on sheet 3 of the drawings illustrate the

page_text: mode of reducing the thickness of the lamp by a sliding door. In this case R is the
door upon the body E which is shewn closed in Figure 16 with the button ² turned
to keep it up in position and Figure 17 is the front view with the door fastened up
while Figure 20 is a cross section showing how the edges 2 and 3 of the door lap
around the bead or other projection of the body. When the button is turned and
the door R is slided down it may be hung upon any convenient hook or staple or other
provision e under the bottom or other part by the hook on the back of the door so
as to leave the hands quite free to trim or attend to the lamp.
With such bodies almost any mode of suspending the lamp from the axle such as a
hook or clip may be used without difficulty as the contraction was principally needed
in the body part which is thus effected.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be preformed I declare that what I claim is :-
1st. The improvements in lamps having facilities for contraction into a smaller
space by means of a door hinged at the bottom substantially as herein set forth.
Second The improvements in lamps having a door E2 arranged to open upwards and
prepared to hang upon a bush F whether with or without ball bearings substantially
as herein set forth.
Third: In lamps used for hanging to bicycles or other axles the spring hook or
hooks N in combination with a door K hinged downwards or a sliding door R
substantially as herein set forth.
:
Fourth In lamps the special door hook hinge shewn by Figures 12, 13, 14 and 15
substantially as herein set forth.
:
Fifth In lamps the special arrangement for removing the door shewn by Figures
9. 10 and 11 substantially as herein set forth.
Sixth The special mode of contracting the thickness of lamps by a sliding door R
as and for the purpose substantially as herein set forth.
Seventh The improvements in lamps herein set forth by which they are made to
go through a small space such as the spokes of a wheel by the hinging or sliding of
the door out of its normal position substantially as herein set forth and illustrated
upon the accompanying three sheets of drawings.
Datod this 21st day of March 1887.
GEORGE BARKER,
77, Colmore Row, Birmingham,
Agent for Applicant.