Improvements in Lamps.
Year: 1888

page_text: COMPLETE SPECIFICATION.
Improvements in Lamps.
I WALTER HENRY BULPITT trading as Bulpitt & Sons of Camden Street
Birmingham in the County of Warwick, Lamp Manufacturer and Tin Plate Worker,
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, which are principally
applicable to velocipedes but which may also be used for or attached to carriages or
other vehicles as is for the purpose of affording secure attachment thereto without
shake or vibration or at least to reduce this as much as possible compatible with the
connections being a lapted for quick and easy removal.
In order that the invention may be clearly understood and easily carried into
practice I have appended hereunto a double sized sheet of drawings upon which a
lamp is illustrated in nine figures so as to show the means of attachment to either
velocipedes or other vehicles and I have confined myself principally to these means
as the lamp body in design and general formation may be greatly varied.
Figure 1 is a side elevation of a lamp such for instance as shown in my previous
Patent No. 4281 A.D. 1887 suitable to either attach to the spindle E of the wheel of
a velocipede or to a hook plate K fixed to any part of a machine carriage or other
vehicle.
Figure 2 is a part cross sectional elevation of the upper part cutting the spindle E
and the bearings 6 or in cross section.
Figure 3 is an internal elevation of the gland or part B and flexible bearings *
and hung upon the shaft E and the bush e' which is made according to my previous
patent before mentioned.
Figure 4 is a broken off sectional elevation of part of the lamp A fixed to the
hook K instead of being suspended from the spindle E.
Figure 5 is a broken off back elevation of the lamp A as shown in the previous
igure as fixed to the hook K.
Figure 6 is a side elevation of a modified plan for fixing to the hook K.
Figure 7 is a back elevation of the parts shown by Figure 6.
Figures 8 and 9 are modifications of the plan shown by Figures 6 and 7.

page_text: The lamp body A may be of any desired construction the one now indicated in
outline being similar to that shown in my previous patent aforesaid and having the
outside bush e fixed upon the spindle E so as to form a part thereof. The bearing
parts inside a' are fixed whereas the bearings and 6 are capable of an adjustable
action so as to take up any wear upon either the spindle or bearings, each being hung
upon sliding pins 62 having coiled or other springs 6, which constantly maintain the
two bearings in a balanced position, and always pressing against the spindle E so as
to prevent any shake or vibration.
The centre pin and nut 63 is used one for each end bearing to secure them in
position, the pins being only sliding mediums. It will be quite evident that the
bearings may be divided at almost any portion of their circumference, that is
diagonally or horizontally, the one shown being a vertical division or nearly so.
In the case of the lamp being suspended to a hook plate such as K Figures 4 and 5
I form a socket N so as to leave a tongue piece n' which is fixed at one end,
the bottom end n by preference, the top end being loose so that by turning the
eccentric screw R the plate n' is forced against the hooked plate K very power-
fully by the eccentric swell 1. This eccentric may be formed as shown finishing
with a slightly flat place 2 or the nose may be rounded but in any case there
must be sufficient movement and power to fasten and liberate the hook plate by
about half a turn of the thumb screw R. The eccentric may of course act directly
upon K without the intervention of the spring n¹. In the case of Figures 6
and 7 the hook plate K is held by the lever plate M which is hingod at m' and
opening out into two heel spurs m³ and m² with springs m fitted underneath the
same so as to always force the point part against K whether the point be at the
bottom or at the top for the plate may be used either way but is shown on
the drawing at the top. I do not confine myself to the springs me as others may
be used such for instance as the mouse trap spring shown at Figure 8 with only
one spur m³ for the thumb to press upon when it is desired to remove the lamp.
In some cases also an arm or arms mmay be fastened or cast to the pivot
cars m and the spring m³ placed directly under the point. The under side of
the point of the lever plate M is roughed as is also the plate a² if found necessary
and the plate a² may be the back of the lamp or a separate plate upon which
the lever M is hung which latter mode I prefer.
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:
First The improvements in lamps by which they are secured to velocipedes,
carriages and other vehicles by adjustable spring bearings which accomodate
themselves to the wear of the parts substantially as and for the purpose herein
set forth and shown upon the drawings in Figures 1. 2 and 3.
Second-The improvements in lamps for velocipedes carriages and other vehicles
of the socket N whether with or without the spring n' in combination with the
eccentric tightening pin R substantially as and for the purpose herein set forth.
-
Third In lamps for velocipedes, carriages and other vehicles the spring lever
arrangement substantially as herein set forth and illustrated by the Figures 6. 7.
and 9.