IMPROVEMENTS IN INCANDESCENT ELECTRIC LAMP APPLIANCES
Year: 1882

page_text: LETTERS PATENT to Joseph Samuel Beeman of Earls Court Road in the
County of Middlesex for an Invention of IMPROVEMENTS IN INCANDESCENT
ELECTRIC LAMP APPLIANCES
PROVISIONAL SPECIFICATION left by the said Joseph Samuel Beeman at
the Office of the Commissioners of Patents on the 14th July 1882.
JOSEPH SAMUEL BEEMAN, of Earls Court Road in the County of Middlesex,
"IMPROVEMENTS IN INCANDESCENT ELECTRIC LAMP APPLIANCES,"
My invention consists of a lamp holder fitted with a stud or studs intended to
slide in a slotted case or receptacle, furnished with a locking ring for fastening the
sliding holder, and with contact plates which are connected with springs interposed
between the bottom of the lamp and the bottom of the inside of the receptacle, or
plates, impinging upon a switching apparatus. Also in forming the communication
between the contact plates and the carbon filament by means of an adjusting
spring or springs, and spiral, serrated or currugated metallic wires or ribbons.
Also in forming the switching apparatus with a contact breaker on one lead and
a metal band and contact pieces giving continuous electrical connection on the
other

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Joseph Samuel Beeman in the Great Seal Patent Office on the
12th January 1883.
JOSEPH SAMUEL BEEMAN, of Earls Court Road, in the County of Middlesex,
IMPROVEMENTS IN INCANDESCENT ELECTRIC LAMP APPLIANCES
My invention embraces a lamp holder fitted with a stud or studs intended to
slide in a slotted case or receptacle furnished with a locking ring for fastening the
sliding holder, and with contact plates which are connected with springs interposed
between the bottom of the lamp and the bottom of the inside of the receptacle, or
plates, impinging upon a switching apparatus. Also the invention embraces the
forming a switching apparatus with a contact breaker on one lead, and a metal
band and contact pieces giving continuous electrical connection on the other lead.
The annexed drawings will serve to show how the invention may be performed.
Like letters in all figures relate to like parts.
Fig. 1, 2 and 24 are respectively, elevation, cross section, and plan of the lamp
holder a made of any suitable material with a convenient non-conducting substance
fitted to form its base, this base being shaped with two recesses b b for holding the
contact plates and at the bottom of these recesses are such contact plates connected
respectively to the two ends of the carbon filament in the incandescent lamp.
These recesses help to guide the springs ff to their respective plates in 6 b. This
lamp holder is fitted with one or more studs e capable of sliding into the slot in
the receptacle c and thus guiding the respective poles of the lamp to their respective
contact springs. This receptacle at its upper end is furnished with a locking ring d
which may have a serrated edge as shown in fig 1 in order to fix the stud e more
securely into position against the springs ff.
In Fig. 3, 6, 13, 14, 15 these springs ff are shown in various forms.
Figs. 9, 10, 11, 12 are respectively parts elevation' cross section, plan and side
elevation of another variety of lamp holder and stud, receptacle and locking ring.
Also showing one or more slots g into which work one or more guide studs h on
locking ring d.
In Figs. 2 and 3 are shown side elevation and cross section of one form of
switching apparatus cam shaped. This it will be observed is divided by an
interposed revolving non-conducting parting piece i, between the revolving contact
breaker and the revolving continuous conductor l. These revolving contact
breakers and continuous conductors are so designed that at certain definite
positions into which they may be turned, they will remain in such positions until
moved by extraneous force.
As and ke revolve at certain points the electric circuit is completed between the
springs n n or, as in Fig 13, metal contact pieces actuated by india-rubber or other
Anrings m
1. A lamp-holder fitted with stud or studs and a receptacle therefor fitted with
slot or slots and locking ring substantially as shown in Figs. 1, 2 and 24 9, 10, 11, 12,
and substantially as described.
2. A lamp-holder with a non-conducting base furnished with recesses and contact
pieces connected to the poles of a lamp substantially as shown in Figs. 2, 24, and
substantially as described.
3. A lamp-holder fitted with stud or studs and a receptacle therefor fitted with

page_text: slot or slots and locking ring, in combination with switching apparatus, substantially
as illustrated and described.
4. The different varieties of contact breakers as shown in Fig. 6, 8, 13, alone,
or in combination with revolving continuous conductor and parting. piece..
substantially as illustrated and described.
In witness whereof I the said Joseph Samuel Beeman, have hereunto set my
hand and seal this 10th day of January A.D. 1883..
T
DODAT