US247380A - Hie am s - Google Patents
Hie am s Download PDFInfo
- Publication number
- US247380A US247380A US247380DA US247380A US 247380 A US247380 A US 247380A US 247380D A US247380D A US 247380DA US 247380 A US247380 A US 247380A
- Authority
- US
- United States
- Prior art keywords
- electrode
- post
- lamp
- current
- binding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000004020 conductor Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 210000003414 Extremities Anatomy 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K1/00—Details
- H01K1/62—One or more circuit elements structurally associated with the lamp
- H01K1/70—One or more circuit elements structurally associated with the lamp with built-in short-circuiting device, e.g. for serially connected lamps
Definitions
- My invention relates especially to the class of lamps known as incandescent lamps, in which a single continuous electrode is used, and in which the light is produced by heating the electrode to incandescence by passing through it a current ofelectricity.
- the electrode has been constantly liable .to destruction by fusion, as its temperature has to be raised nearly to the fusing-point of the material of which it is constructed and maintained thereduring all the time that the lamp is in use. Under such circumstances a slight increase in the current above its normal 1strength fuses the electrode and destroys the amp.
- My improvement consists of an automatic device operated by the heat of the lamp, whereby the incandescent strip or electrode is relieved by shunting off a part of the current through another circuit whenever the electrode becomes dangerously heated.
- Figure l is an oblique view of a lamp constructed in accordance with my invention
- Fig. 2 is a vertical section of the same, taken at a line slightly removed from the center.
- A is a base, made of wood or other non-conducting material.
- B is a metallic bed-plate, having affixed to it an overhanging arm, 0.
- D is a flat horizontal spring attached at one end to the bed-plate B, and insulated from it byablock of insulating material. It has a binding-post, E, to receive one wire of the circuit.
- F is a rod or spindle passing through a vertical hole in the arm-O at its extremity, and having a screw-thread out upon it, carrying the adjusting-nut I.
- G is a small set-screw inserted in the arm 0
- H is a ribbon-shaped electrode or strip of conducting material, preferably platinum, held in clamps attached to the lower end of the rod F and the outer end of the spring D.
- K is a metallic pin or post erected under the lower clamp of the electrode, insulated from the bed-plate B, and extending down into the base A.
- L is a binding-post to receive the other wire of the circuit. It is electrically connected with the arm 0 and the post K.
- the operation of this device is as follows:
- the spindle F is so adjusted by means of the nut I that the lower clamp of the electrode just clears the post K when the electrode is heated to the desired degree of incandescence.
- the current then passes from the binding-post E through the spring D, the electrode H, the spindle F, and the arm 0, and its connection to the binding-post L, and thence back to the source of electricity.
- the electrode becomes more highly heated andincreases in length, allowing its lower clamp to drop down into contact with the post K when the current or apartofit is shunted off through K and its connections to the binding-post L.
- the temperature of the electrode becomes sufficiently reduced it contracts and opens the shunt, thus causing the full current to pass through the electrode again.
- a globe of the usual form may be used with this form of lamp, and the shunt may be operated by a strip or rod of metal other than the light-giving portion of the lamp placed in the circuit for that purpose-as, for example, by the rod E, which may be made of any suitable size and material.
- a lever either with or without a spring, may also be used in place of the spring D, and the insulation of the post K from the bed-plate is not essential unless it is desired to interpose a resistance-coil between K and L, in which case such coil may be placed in the hollow thermostaticcircuit-regulator,substantially as base A. described, and for the purposes set forth.
- My invention relates, broadly, to an auto- 2.
- a matic shunt or circuit-regulator operated by thermostatically-operated shunt, substantially 5 the heat of the lamp. 5 as described, and for the purposes set forth.
Landscapes
- Radiation-Therapy Devices (AREA)
Description
H. s. MAXIM."
I I ELECTRIC LAMP. No, 247,380. Patented Sept. 20,1881.
1 2% 1 Illtllllll amt? W 'r rr eases. n w lFP/EE'LEIK UNITED STATES PATENT OFFICE.
HIRAM S. MAXIM, OF BROOKLYN, NEW YORK.
ELECTRIC LAMP.
SPECIFICATION formingpart of Letters Patent No. 247,380, dated September 20, 1881. Application filed December 22, 1879.
To all whom it may concern:
Be it known that I, HIRAM S. MAXIM,of the city of Brooklyn, county of Kings, and State of New York, have invented certain new and useful Improvements in Electric Lamps, of which the following is a specification, reference being had to the accompanying drawings, which are designed to form a part hereof.
My invention relates especially to the class of lamps known as incandescent lamps, in which a single continuous electrode is used, and in which the light is produced by heating the electrode to incandescence by passing through it a current ofelectricity. In such lamps, as they have heretofore been constructed, the electrode has been constantly liable .to destruction by fusion, as its temperature has to be raised nearly to the fusing-point of the material of which it is constructed and maintained thereduring all the time that the lamp is in use. Under such circumstances a slight increase in the current above its normal 1strength fuses the electrode and destroys the amp.
My improvement consists of an automatic device operated by the heat of the lamp, whereby the incandescent strip or electrode is relieved by shunting off a part of the current through another circuit whenever the electrode becomes dangerously heated.
In the drawings, Figure l is an oblique view of a lamp constructed in accordance with my invention, and Fig. 2 is a vertical section of the same, taken at a line slightly removed from the center.
A is a base, made of wood or other non-conducting material.
B is a metallic bed-plate, having affixed to it an overhanging arm, 0.
D is a flat horizontal spring attached at one end to the bed-plate B, and insulated from it byablock of insulating material. It has a binding-post, E, to receive one wire of the circuit.
F is a rod or spindle passing through a vertical hole in the arm-O at its extremity, and having a screw-thread out upon it, carrying the adjusting-nut I.
G is a small set-screw inserted in the arm 0,
and working in a groove in the side of the rod F, to keep it from turning.
H is a ribbon-shaped electrode or strip of conducting material, preferably platinum, held in clamps attached to the lower end of the rod F and the outer end of the spring D.
K is a metallic pin or post erected under the lower clamp of the electrode, insulated from the bed-plate B, and extending down into the base A.
L is a binding-post to receive the other wire of the circuit. It is electrically connected with the arm 0 and the post K.
The operation of this device is as follows: The spindle F is so adjusted by means of the nut I that the lower clamp of the electrode just clears the post K when the electrode is heated to the desired degree of incandescence. The current then passes from the binding-post E through the spring D, the electrode H, the spindle F, and the arm 0, and its connection to the binding-post L, and thence back to the source of electricity. If, however, the current increases in strength, however slightly, the electrode becomes more highly heated andincreases in length, allowing its lower clamp to drop down into contact with the post K when the current or apartofit is shunted off through K and its connections to the binding-post L. As soon as the temperature of the electrode becomes sufficiently reduced it contracts and opens the shunt, thus causing the full current to pass through the electrode again.
It will be observed that this device is entirely automatic and certain in its operation. It is very sensitive and susceptible of delicate adjustment.
A globe of the usual form may be used with this form of lamp, and the shunt may be operated by a strip or rod of metal other than the light-giving portion of the lamp placed in the circuit for that purpose-as, for example, by the rod E, which may be made of any suitable size and material.
A lever, either with or without a spring, may also be used in place of the spring D, and the insulation of the post K from the bed-plate is not essential unless it is desired to interpose a resistance-coil between K and L, in which case such coil may be placed in the hollow thermostaticcircuit-regulator,substantially as base A. described, and for the purposes set forth.
My invention relates, broadly, to an auto- 2. In combination with an electric light, a matic shunt or circuit-regulator operated by thermostatically-operated shunt, substantially 5 the heat of the lamp. 5 as described, and for the purposes set forth.
Having descrihedrny invention, whatI claim as new, and desire to secure by Letters Pat- HIRAM MAXIM ent, is- Witnesses:
1. In combination with an electric-light hav- CHAS. G. GLAGGETT, 1o iug a continuous incandescent conductor, a, LEONARD E. CURTIS.
Publications (1)
Publication Number | Publication Date |
---|---|
US247380A true US247380A (en) | 1881-09-20 |
Family
ID=2316704
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US247380D Expired - Lifetime US247380A (en) | Hie am s |
Country Status (1)
Country | Link |
---|---|
US (1) | US247380A (en) |
-
0
- US US247380D patent/US247380A/en not_active Expired - Lifetime
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US247380A (en) | Hie am s | |
US527989A (en) | hussey | |
US678320A (en) | Incandescent electric lamp. | |
US242897A (en) | Incandescent electric lamp | |
US749705A (en) | Field | |
US331002A (en) | Charles g | |
US217792A (en) | Improvement in electric-lighting apparatus | |
US603705A (en) | Electric incandescent lamp | |
US1022058A (en) | Electrical apparatus. | |
US859821A (en) | Controller for incandescent-electric-light bulbs. | |
US903861A (en) | Arc-lamp. | |
US394180A (en) | Cut-out for electric lamps | |
US319129A (en) | roussy | |
US264984A (en) | weston | |
US361844A (en) | Safety device for incandescent lamps | |
US435049A (en) | Walter f | |
US420370A (en) | Incandescent-lamp socket | |
US383675A (en) | Edward p | |
US778155A (en) | Incandescent electric lamp and switch. | |
US414966A (en) | Mechanical cut-out | |
US356199A (en) | Incandescent electric lamp | |
US572421A (en) | William hawker | |
US515960A (en) | Edward ii | |
US268155A (en) | van choate | |
US820489A (en) | Ballast device for nernst lamps. |