Improved Means for Attaching Shades to Electric Incandescent Lamp Holders.
Year: 1897

page_text: Date of Application, 7th May, 1897
Complete Specification Left, 5th Feb., 1898-Accepted, 26th Mar.,
1898
PROVISIONAL SPECIFICATION.
Improved Means for Attaching Shades to Electric Incandescent
Lamp Holders.
We, HERBERT HAMPTON HALL, of 126A, Duke Street, Liverpool, in the County
of Lancaster, Electrical Engineer, and TпоMAS CLARKE, of 44, Esmond Street,
Anfield, Liverpool, in the County of Lancaster, Engineer, do hereby declare the
nature of this invention to be as follows:-
-
This invention relates to means for attaching shades to electric incandescent
lamp holders and consists in the improvement hereinafter set forth.
Hitherto it has been usual to pass the shade over the socket in the lamp holder
which is externally screwed and to securo it in position with a screwed collar or
ring nut from the inside. Owing to the necessarily fine screw thread of the nut
and socket and the small size of the shade most generally used, and to the size
of the lamp and form of the shade, the nut can only be handled with the tips of
the fingers; especially when as is most frequently the case the smaller lamps are
used and when there is a considerable number of them much time is wasted in
fitting the shades in position.
Now the main object of this invention is to overcome this objection and so to
facilitate the attachment of the shades to the lamps.
According to our invention we form a sleeve of metal having a shoulder or
collar at one end and of sufficient length to pass through the shade from the
inside as far as the shoulder and to receive a screwed collar or nut of suitable size.
The sleeve is screwed inside and outside, the inside being of suitable size to
screw upon the socket of the holder.
The sleeve is first passed through the shade from the inside so that the collar
thereon bears against the inside face of the shade at the apex; the screwed collar
or nut is then passed on to the sleeve on the outside of the shade, thus securing
the shade to the sleeve. The sleeve carrying the shade is afterwards screwed on
to the holder socket.

page_text: Improved Means for Attaching Shades to Electric Incandescent
Lamp Holders.
We, HERBERT HAMPTON HALL, of 59, Duke Street, and formerly of 126A, Duke
Street, Liverpool, in the County of Lancaster, Electrical Engineer, and TочAS
CLARKE, of 44, Esmond Street, Anfield, Liverpool, 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:-
This invention relates to means for attaching shades to electric incandescent
lamp holders and consists in the improvement hereinafter set forth.
Hitherto it has been usual to pass the shade over the socket in the lamp holder
which socket is generally externally screwed and to secure such shade in position
by means of a screwed collar or ring nut from the inside of the shade. Owing to
the necessarily fine screw thread of the nut and socket, which makes the starting
of the nut upon the screw more difficult, and to the small size and particular
form of the shade most generally used, the nut can only be handled with the tips
of the fingers; especially when as is most frequently the case, the smaller lamps
are used, and when there is a considerable number of them, much time is wasted
iu fitting the lamps with shades when in position.
Now the object of this invention is mainly to overcome this objection and so to
facilitate the attachment of the shades to the lamps.
In order that our invention may be more readily understood, we have attached
.hereunto a sheet of drawings to which we will now refer. In the said drawings
Figure 1 represents an elevation partly in section of the parts forming our im-
proved attachment; Figure 2 represents a lamp holder of the present almost
universal pattern; and Figure 3 represents in elevation a lamp holder with lamp
and shade combined by means of our improved attachment.
According to our invention, we form a sleeve a of metal internally screwed of
suitable size to screw upon the socket 6 of the lamp holder. This sleeve is formed
with a collar or shoulder a¹ at one end and of suitable size to pass through the
crown or apex of the shade c until the latter rests upon the said shoulder a¹.
The sleeve is externally screwed to receive a nut or screwed collar a² and is of
sufficient length to pass through the shade c from the inside thereof and to receive
the nut a upon the top by which the shade is locked to the sleeve. The shade
can now be quickly attached to and detached from the lamp holder by screwing
the sleeve while carrying the shade upon or off the said holder.
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:-
-
First. The method of attaching shades or reflectors to electric incandescent lamp
holders by means of an internally and externally screwed sleeve first secured to
the shade by collars and then screwed upon the lamp holder, substantially as and
for the purpose herein before described and illustrated by the annexed sheet of
drawings.
Second. The improved construction of shade attachment for electric incandescent
lamp holders consisting of the internally and externally screwed sleeve a formed
with a collar a¹ and a screwed collar a³ substantially as described with reference

page_text: to Figures 1 and 3 of the drawings hereunto annexed, and for the purpose set
forth.
Doted this 4th day of Fahmu 1908
R. J. URQUHART,
57, Barton Arcade, Manchester,
Harrington Chambers, 24, North John Street, Liverpool,
Consulting Engineer and Patent Agent,
Late of 6, Clayton Square, Liverpool.