US3121185A - Electric lamp with lamp-cap-type base connector - Google Patents

Electric lamp with lamp-cap-type base connector Download PDF

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Publication number
US3121185A
US3121185A US82469A US8246961A US3121185A US 3121185 A US3121185 A US 3121185A US 82469 A US82469 A US 82469A US 8246961 A US8246961 A US 8246961A US 3121185 A US3121185 A US 3121185A
Authority
US
United States
Prior art keywords
bulb
lamp
cap
lamp cap
plug pins
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
Application number
US82469A
Other languages
English (en)
Inventor
Poels Hendrikus Johan Hubertus
Florie Hermanus Johanne Petrus
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
US Philips Corp
North American Philips Co Inc
Original Assignee
US Philips Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by US Philips Corp filed Critical US Philips Corp
Application granted granted Critical
Publication of US3121185A publication Critical patent/US3121185A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/42—Means forming part of the lamp for the purpose of providing electrical connection, or support for, the lamp
    • H01K1/46—Means forming part of the lamp for the purpose of providing electrical connection, or support for, the lamp supported by a separate part, e.g. base, cap

Definitions

  • This invention relates to electric incandescent lamps provided with plug pins for an operating voltage higher than 100 volts and having a low wattage, wherein the plug pins me secured in the base of a lamp cap made of insulating material.
  • a lamp according to the invention is characterized in that, while the bulb is secured to the cap solely by means of current-supply wires emerging from the bulb and connected to the plug pins, the bulb in the direction of its length is substantially surrounded by the lamp cap, the supporting wires inside the bulb being proportioned so that their free ends rem-ate from the pinch are located inside the space bounded by the lamp cap, and at least one flexible spacer being provided between the outer side of the bulb and the inner side of the lamp cap.
  • Lamps of this kind are used in rooms, for example, to obtain a limited local illumination. They are inserted into plug sockets locally available.
  • the disadvantage inherent in the use or” such lamps is that they are readily damaged due to their very arrangement in plug sockets.
  • conventional plug-socket lamps formed as incandescent lamps involve the disadvantage that, if the bulb of a lamp positioned in a plug socket is damaged, the live supporting wires of the lamps are freely accessible and may thus give rise to accidents. This disadvantage might be obviated by making the lamp cap surround the bulb over a comparatively great length, thus reducing the chance of the bulb being damaged.
  • the supporting wires inside the bulb would be proportioned so that their free ends remote from the pinch are located within the space bounded by the lamp cap, the advantage is obtained that, in case of breakage of the bulb, the freely accessible supporting wires are protected from direct contact, at least to a certain e tent, namely as reckoned from the sides of the lamp, by means of the cap still available.
  • the inner side of the lamp cap in order slightly to support the bulb in its lateral direction and to prevent the pieces of wire between the rear side of the bulb and the ends of the plug pins adjacent the bulb from being accessible from the front or" the lamp, it is necessary for the inner side of the lamp cap to surround the outer side of the bulb comparatively tightly.
  • the flexible spacers are formed by one or more sleeves of metal sheet profiled in the transverse direction of the lamp, the further advantage is obtained that a reasonable ventilation occurs between the outer side of the bulb and the inner side of the cap.
  • the temperature of the lamp cap by l. cans of which 3,l2l,l85 Patented Feb. 11, 1954 the lamp is handled by the user, is several tens of degrees Celsius lower than in the absence of such spacers.
  • a lamp of low wattage a lamp is concerned having a wattage usually less than 20 watts and more particularly less than 10 watts.
  • FIGURE 1 shows one embodiment of a lamp according to the invention, the cap of which is shown in longitudinal section, so that the bulb present therein and the structure of the spacer can also be seen;
  • FIGURE 2 is a longitudinal view of the lamp and FIG 3 is a plan view thereof.
  • the lamp comprises a bulb ll of a more or less conical shape, into which a stem 2 is sealed.
  • a filament of 6 watts for an operating voltage of 220 volts is stretched on support wires 3 and iof the ste.. 2 in a zigzag manner with the aid of supporting wires.
  • a pinch 6 of the lamp contains in the usual manner an exhaust tube 7 through which the bulb is evacuated.
  • the bulb l is secured to a lamp cap it solely by means of current-supply wires 8 and 9 projecting therefrom.
  • the cap i comprises a substantially cylindrical portion 11 and a base 12, in which base two hollow plug pins 13 and is are flanged in position.
  • the ends of the current-supply wires 8 and 9 are passed through the hollow plug pins 13 and i4 and soldered to the lower ends thereof with the aid oi amounts of solder 15' and 16.
  • the bulb 1 is secured to the lamp cap it solely by means of the comparatively slack conductors t3 and 9. This implies that the bulb 1 requires additional support in the cap it If the internal diame er of the cylindrical portion 11 of the cap R has too small a tolerance relative to the outer diameter of the bulb l, the danger previously referred to arises that upon the expansion of the bulb which occurs during the use of the lamp, the bulb contacts with the inner side or" the lamp cap it which might result in premature breakage of the bulb 1.
  • a sleeve 18 of metal sheet, more particularly of aluminum, which serves as a spacer, is arranged in this embodiment in the interspace between the outer side of the bulb 1 and the inner side of the cylindrical portion 11 of the lamp cap it).
  • the sleeve 18 is profded transver ely to the direction of length of the lamp. it is thus ensured that the bulb 1, although supported, can freely expand to the desired extent.
  • the presence of the sleeve-like body 1-3 is found highly to enhance the ventilation in the space between the inner side of tie lamp cap it and the outer side of the bulb 1.
  • the presence or" the sleeve-shaped body prevents any contact with the conductors present in the space of the cap between the rear side of the bulb and the side of their entrance into the plug pins.
  • An electric incandescent lamp provided with plug pins having an operating voltage in excess of .100 volts and a relatively low wattage comprising a bulb having a pinch, a lamp cap of insulating materia surrounding said bulb for the greater part of said len'eth but spaced therefrom, said plug pins being secured in the base of sai lamp cap, current sugply Wires from said bulb being connected to said plug pins creating the sol connection between said bulb and said lamp cap, at least one flexible spacer arranged between the outer side of the bulb and the inner surface or said lamp cap, and supporting Wires in sm'd bulb their free ends remote from said pinch in the space bounded by the inner surface of said larnp cap.
  • An electric incandescent lamp provided with plug pins havi g an operating voltage in excess of 10%- volts and a relatively low wattage comprising a bulb having a pinch, a lamp cap of insulating material surrounding said 15 bulb for the greater part of from, said plug pins being said length but spaced theresecured in the base of said a lamp cap, current supply Wires from sai bulb being connected to said plug pins creating the sole connection between said bulb and said lamp ca at least one flexible spacer of a corrugated metal sheet which is profiled in a direction substantially transverse to the longitudinal axis of said lamp, and supporting Wires in said bulb having their free ends remote from said pinch in the space bounded by the inner surface or said lamp cap.
  • An electric incandescent lamp as claimed in claim 2 said flexible spacer is constituted of aluminum.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
US82469A 1960-02-13 1961-01-13 Electric lamp with lamp-cap-type base connector Expired - Lifetime US3121185A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL248393 1960-02-13

Publications (1)

Publication Number Publication Date
US3121185A true US3121185A (en) 1964-02-11

Family

ID=19752179

Family Applications (1)

Application Number Title Priority Date Filing Date
US82469A Expired - Lifetime US3121185A (en) 1960-02-13 1961-01-13 Electric lamp with lamp-cap-type base connector

Country Status (3)

Country Link
US (1) US3121185A (pm)
GB (1) GB967196A (pm)
NL (2) NL248393A (pm)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3229083A (en) * 1963-05-22 1966-01-11 Jr Ben B George Replaceable miniature lamp assembly
US3633060A (en) * 1969-07-07 1972-01-04 Varian Associates Arc lamp having an acoustical mode absorber
US5572090A (en) * 1995-08-18 1996-11-05 Carley; James A. Quality lamp and method for making
US20080102694A1 (en) * 2006-10-31 2008-05-01 Cheng-Chia Hsu Fixation Structure for Fixing a Lamp on a Printed Circuit Board

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1977105A (en) * 1934-06-04 1934-10-16 C D Wood Electric Company Inc Lighting device
US2366216A (en) * 1942-02-14 1945-01-02 Dorsey Spencer H Shield for mercury vapor lamps
US2627048A (en) * 1950-01-03 1953-01-27 Gen Electric Electric terminal connector

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1977105A (en) * 1934-06-04 1934-10-16 C D Wood Electric Company Inc Lighting device
US2366216A (en) * 1942-02-14 1945-01-02 Dorsey Spencer H Shield for mercury vapor lamps
US2627048A (en) * 1950-01-03 1953-01-27 Gen Electric Electric terminal connector

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3229083A (en) * 1963-05-22 1966-01-11 Jr Ben B George Replaceable miniature lamp assembly
US3633060A (en) * 1969-07-07 1972-01-04 Varian Associates Arc lamp having an acoustical mode absorber
US5572090A (en) * 1995-08-18 1996-11-05 Carley; James A. Quality lamp and method for making
US20080102694A1 (en) * 2006-10-31 2008-05-01 Cheng-Chia Hsu Fixation Structure for Fixing a Lamp on a Printed Circuit Board
US7425139B2 (en) * 2006-10-31 2008-09-16 Logah Technology Corp. Fixation structure for fixing a lamp on a printed circuit board

Also Published As

Publication number Publication date
GB967196A (en) 1964-08-19
NL113387C (pm)
NL248393A (pm)

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