CA1128111A - Capless electric incandescent lamp - Google Patents

Capless electric incandescent lamp

Info

Publication number
CA1128111A
CA1128111A CA330,980A CA330980A CA1128111A CA 1128111 A CA1128111 A CA 1128111A CA 330980 A CA330980 A CA 330980A CA 1128111 A CA1128111 A CA 1128111A
Authority
CA
Canada
Prior art keywords
lamp
side faces
pinch
inclined side
fixing member
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
Application number
CA330,980A
Other languages
French (fr)
Inventor
Victor R. Notelteirs
Josephus F. Rijckaert
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Application granted granted Critical
Publication of CA1128111A publication Critical patent/CA1128111A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01KELECTRIC INCANDESCENT LAMPS
    • H01K1/00Details
    • H01K1/42Means forming part of the lamp for the purpose of providing electrical connection, or support for, the lamp
    • H01K1/44Means forming part of the lamp for the purpose of providing electrical connection, or support for, the lamp directly applied to, or forming part of, the vessel
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10HELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
    • G10H2210/00Aspects or methods of musical processing having intrinsic musical character, i.e. involving musical theory or musical parameters or relying on musical knowledge, as applied in electrophonic musical tools or instruments
    • G10H2210/555Tonality processing, involving the key in which a musical piece or melody is played
    • G10H2210/565Manual designation or selection of a tonality

Landscapes

  • Fastening Of Light Sources Or Lamp Holders (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

PHN. 9187.

ABSTRACT:
Capless electric incandescent lamp having a flat pinch with a first major face along which the current conductors are bent back may be constructed so that when placed in a lamp holder the filament always assumes the same position. For that purpose the lamps comprise on a second major face means which can coop-erate with a fixing member in a lamp holder and two inclined side faces for centring the lamp in a lamp holder. In a capless incandescent lamp according to the invention, grooves or ribs constituting the means to cooperate with a fixing member are situated on the inclined side faces of the pinch. As a result of this construction, the lamps are more accurately positioned in a lamp holder in spite of smaller forces exerted by the fixing member.

Description

1 PHN. 9187.

The invention relates to a capless elec-tric incandescent lamp having a glass lamp envelope in which a filament is accommodated and which is sealed by means of a flat pinch in which current conductors are incorporated, which conductors extend to the filament and emanate from the lamp envelope at the end of the pinch remote from the filament, said pinch having first and second parallel major faces and two narrow side faces, the current conductors being bent back along the first major face and the second major face being connec-ted to the narrow side faces vla respective inclined side faces, the surface of the pinch having means to cooperate with a fixing member of a lamp holder.
Such a lamp is disclosed in our Canadian Patent 1,088,996 which issued orl November ~, 1980.
This known lamp may be used in an optical system in which it is of importance tha-t, each time the lamp is placed in a lamp holder, the filament should assume substantially the same position with respect to a refer-ence point. This is desired, for example, when the lampis used in a reflector, for example in a vehicle head-light, in which case the reference point is the focus of the reflector.
It has been found that the known lamp re-quires a lamp holder having a fixing member which exerts a comparatively large pressure on the pinch of the lamp. -.~ ~

,L~ 'L

17 3 1979 z PHN. 9187 If this pressure is too low, -the lamp may assume an in-clined posi-tion in the lamp ho:Lder by rotation about an axis perpendicular to the major faces. In cases in which the lamp envelope provides lit-tle grip, it may be cumber~
some to remove a spent lamp from the holder if the large pressure required for ensuri.ng correct positioning is exerted by the fixing member.
It is the objec-t of the invention to provide a lamp by means of wh:ich an adequately accurate locat:ion of -the f:ilament wi-th respec-t to a reference point is read:ily and repeateclly obtainable on insertion of the lamp i.n a larnp holder and which can also be easily placed in and removed frorn the holder.
In ag:reement herewith the invention re].a-tes to an elect:ric :incandescent larl1p of the kind ment:ioned:in tlle openi.ng paragraph ~ :ich :is character:ized :in tllat the mealls to coopQrate with a fix:i.llg lllembe:r Or a lamp holcler are provi.ded OIL the incl.:ined sicle faces of the p-inch.
~17 one embod:irtlent t]-lese means COlLs:ist of a groove i.n eacll of the inc:l.ined s:icle :races provicled tralls-vorse:ly l;o t]lC :I.orlg:it-llc1:ina:l. axiC; O:e t11e :Lall1p.
Irl <another embc)dirnent the inclined s:ide - f`aces each have a respective rib thereon extending transver-se]y to the longitl1dinal axis. However, it is alternati~rely possib:Le to provide one inclined side face with a rib and the other ~ith a groove, or providillg each of them, ~or example, with a rib and a ~roove. The advantage O e grooves is tha-t -they are less vulnerable to damage.
It has.been found that the lamp according to the :invention combines the advantages of the l~n.own lamp, an accurate defini-tion of the locat:ion of` the filament after placing the lamp in a holder, with the advantag~e of a smal.1.
pressure exerted on the pinch by the fi~ing member and hen-ce an easy exchangeability. .
Since the fix-ing members of the lamp.hol-der for the lamp according to the inven-tion engage the in~
clined side faces of the pinch, they fu~fil a mu:l-tiple fullcti.on:
(1) they exe:rt a p:ressure parallel to the major faccs of ' ..... ....... ,.. , .. . . . . , I

~, 28~

16.3.1979 3 PHN. 9187 the pinch so that the larnp is centred in the holder;
(2) they exert a pressure perpendicu:Lar to the major faces so that the curren-t conductors o~ the larnp are pressed against the electric contact of the lamp holder, and (3) -they fix the height of the lamp in the lamp holder. As a result of` this combinati.on of :iunctions, an extra member in the lan1p holde:r :L`or press:ing the current conductors of the lamp aga;.nst the electric contacts of the lamp holde:r may in many cases be omitted.
I 10 The lan1p according to the invention may : advan-tageously be constructed as a halogen incandescent lamp in a hard gl.ass lamp envelope, for e~ample, of al]~ali al.u1r1illoborosil:i.cclte g:lass havirlg a composi.-t:i.on of substan-tlai.ly 77-81/~ by ~e:igllt S:iO2, 12-15~/o b~r weight B~03, 3-5.5 by weight Na?0 alld 1.5-2.5// by weight ~120~. Such a g].ass has a coeffi.c:ient. of expens:ion o* 31-37 x 10 7 C
Embodi111erlts of the lamp according to the invent:ioll are shown in the accompanyinf, d:rawi:ngs, of which:
.~:i.g. 1 :is a f:l"Oll'ii e:LevQt:i.o]l of a lalllp;
~i.g. 2 :is a si.de elevation of the same lamp;
~ig. 3 is a cross-sec-t;ional view taken on the line III-III of the lamp sllown in ~igs. 1 and 2;
Fig. l1 is a corresponding sectional view ;~
of a modif`ied embodiment of` tl~e lan1p of ~igs. 1 and 2 pla-ced in a lamp ho:Lder which :i.s shown di.agrammatically;
~ ig. 5 is a front elevation of another modified e1nbodi.ment of` a pi.nch; and ~ ig. 6 is a sectional view taken on the line VI-VI of the p:i.nch shown in ~ig. 5.
In -these ~igu-res corresponding parts are referred to by the san1e reference numerals.
In ~'igs. 1 and 2, referellce numeral 1 de-notes a glass lamp enve:lope in which a fii.ament 2 is stret 35 ched and whicll i.s sealed by means of a`fla-t pinch 3 through which cnrrent conductors 1~ and 5 extend to the filamcnt.
Tlle c1lrrent conduct;ors emanate at the en.d ~) of the plncll remote f.ro1n l-he fi:Larme1ll 2. The current conduc-t;ors are bent ~:
I

c ~ 8~

16.3.1979 4 PHN. 9`187 bac~ along a first major face 7 (Ei.g. 2) of the pinch. The curren-t conductors are each surrourlded there by a squeezed-on nickel sleeve 18, 19 so as to ensure good corrosion-re--sisten-t con-tacts.
Parallel to the first major face 7 the pinch 3 has a second major face 8 and two Inutua:lly parallel narrow si.de faces 9 and 10. Inclinecl side faces 11 and 12 connect the second major face 8 to the respective narrow side faces 9 and 10. In the larnp shown. in l~igures 1 and 2, the first major face 7 is also connec-ted to the narrow side faces 9 and 10 via inclined side faces 13 and 14 (Eig. 3).
In each of the inclined side faces '1'1 and 12 grooves 15 and 16, respect:ively, are present, with which a f:ixi.ng nlelnber o:E` a :lanlp holder Call cooperate. 17 denotes t:hc :longitucl:inal ax:is of tlle :I.amp.
In ~:ig.3,~derlol:es the acllte angle wh:ich the :inclined s:icle faces 'I 1 and 12 enclose w:i.th thc narrow side :~aces 9 and 10, respe~c-tive:l.y, alld~derlotes t:he acute allg:l.e wll-i.ch th~y enc.1.ose w:Ltll -the secol-ld nlcljor :~ace S.
2n ln E:i.~,~. 'I l;.ll~ llcl~.nlrOW ~S i.~ ;E`a.ces 9 ancl 10 i.rnlnecliaLely aclJo:in t}~e f:irst nlajor ~ace 7. I~o denotes the housing of a lamp holder which has mutually insula-ted elec-tric contacts 41 and 42. Eixillg members 43 and 44 wl~ich are movable against resilient forces engage in grooves -l5 and 16, respec-tively~ fi.x the heigh-t of the .Lamp in the :lamp ho:lder, hold the current conductors 18 and 1~ pressed against the contacts 4l and 42, ànd centre the lamp in the holder.
In Ejgs. 5 and 6 the pincll 3 comprises 30 ribs 20 and 21, respective:Ly, on its inclined side faces 11 and 12 for cooperation wi-tll a fixing Inelllber of a :larnp hol-der.
EX~IPLE
A lamp having -the shape as sllowll in Eigs.
1 to 3 had a hard glass lalnp en~relope conslsting of 80. 5%
b~ wei.ght SiO2, 13% by weight B203 ~ 3 5% by ~e:~gllt Na~O~
2.3qO by weiglll ~1~03 and 0. 7qO by ~e;.gllt I20. Ou.-tside the lamp enveloE~e the n~o:lybdenllln cur:rent. condnctors were 16.3.1979 5 ` PHN. 9187 enveloped by Q niclcel -tube and squeezed. The lamp envelope was fi:l:Led Wi.t}l 7 bar kryp-ton to which 0 . 1% by volume CH2Br2 had been added. The lamp consumed a power of 12 W at 6.75 V.
The inc:lined side faces of the pinch in this lalnp enc]osed an angle~ of 30 wi-th the narro-w side faces and an ang:le~ of 60 with the second major face 8.

.
.

.

.

Claims (3)

PHN. 9187.

THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A capless electric incandescent lamp having a glass lamp envelope in which a filament is accommodated and which is sealed by means of a flat pinch in which current conductors are incorporated, which conductors extend to the filament and emanate from the lamp envelope at the end of the pinch remote from the filament, said pinch having first and second parallel major faces and two narrow side faces, the current conductors being bent back along the first major face and the second major face being connected to the narrow side faces via respective inclined side faces, the surface of the pinch having means to cooperate with a fixing member of a lamp holder, charac-terized in that the means for cooperation with a fixing member of a lamp holder are provided on the inclined side faces of the pinch.
2. A lamp as claimed in Claim 1, characterized in that said means comprises a groove in each of the inclined side faces, each groove extending transversely of the longitudinal axis of the lamp.
3. A lamp as claimed in Claim 1, characterized in that said means comprises a rib on each of the inclined side faces, each rib extending transversely of the longi-tudinal axis of the lamp.
CA330,980A 1978-07-07 1979-06-28 Capless electric incandescent lamp Expired CA1128111A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL7807349A NL7807349A (en) 1978-07-07 1978-07-07 HELSLESS ELECTRIC LIGHT BULB.
NL7807349 1978-07-07

Publications (1)

Publication Number Publication Date
CA1128111A true CA1128111A (en) 1982-07-20

Family

ID=19831213

Family Applications (1)

Application Number Title Priority Date Filing Date
CA330,980A Expired CA1128111A (en) 1978-07-07 1979-06-28 Capless electric incandescent lamp

Country Status (9)

Country Link
JP (1) JPS5510799A (en)
BE (1) BE877520A (en)
CA (1) CA1128111A (en)
DE (1) DE2927201C2 (en)
ES (1) ES482234A1 (en)
FR (1) FR2430666A1 (en)
GB (1) GB2025127B (en)
IT (2) IT7922020V0 (en)
NL (1) NL7807349A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6991812B2 (en) 2000-09-05 2006-01-31 Kao Corporation Agent for preventing, improving or treating hypertension

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL189324C (en) * 1983-03-03 1993-03-01 Philips Nv HALOGEN LIGHT.
HU190574B (en) * 1984-06-25 1986-09-29 Tunsgram Reszvenytarsasag,Hu Light source with flattened glass envelope, preferably halogen incandescent lamp and method for fastening the body of the lamp to the housing or optical element
US5039909A (en) * 1989-04-24 1991-08-13 U.S. Philips Corporation Electric lamp and holder for such a lamp

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1389923A (en) * 1963-04-04 1965-02-19 Ass Elect Ind Electric incandescent lamp
DE1639093B2 (en) * 1967-06-28 1977-04-14 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 8000 München LIGHT BULB WITH AN EXTERNAL CRUSH DESIGNED AS A BASE
NL7610860A (en) * 1976-10-01 1978-04-04 Philips Nv CELLLESS ELECTRIC LIGHT BULB.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6991812B2 (en) 2000-09-05 2006-01-31 Kao Corporation Agent for preventing, improving or treating hypertension

Also Published As

Publication number Publication date
IT7922020V0 (en) 1979-07-04
FR2430666A1 (en) 1980-02-01
JPS5510799A (en) 1980-01-25
NL7807349A (en) 1980-01-09
IT1122015B (en) 1986-04-23
GB2025127B (en) 1982-07-07
FR2430666B1 (en) 1981-11-06
IT7924108A0 (en) 1979-07-04
ES482234A1 (en) 1980-02-16
DE2927201A1 (en) 1980-01-17
DE2927201C2 (en) 1984-11-22
BE877520A (en) 1980-01-07
GB2025127A (en) 1980-01-16

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