US1917090A - X-ray apparatus - Google Patents
X-ray apparatus Download PDFInfo
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- US1917090A US1917090A US569090A US56909031A US1917090A US 1917090 A US1917090 A US 1917090A US 569090 A US569090 A US 569090A US 56909031 A US56909031 A US 56909031A US 1917090 A US1917090 A US 1917090A
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- tube
- transformer
- envelope
- ray
- piece
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05G—X-RAY TECHNIQUE
- H05G1/00—X-ray apparatus involving X-ray tubes; Circuits therefor
- H05G1/02—Constructional details
- H05G1/04—Mounting the X-ray tube within a closed housing
Definitions
- i'Which-,-Whenfthetubes aremounted maybe actuated by thef means l of Y fattaehnjientglwith ⁇ -vi'vhi'eh'lthe; tubes areprovided, and ,b 'off I nernb frfee andfdoes not pushl-it inwards; i
- the diffeent-Yoltages may be combinediA with the means A'for ytheV attachment-of 1the 'tubeV in suChfmanne 1"- ⁇ the Connectingde- -ioo in section, in a vertical position, the tube being parallel to the plane of the drawings.
- Figure 2 represents, likewise partly in section, a lateral elevation of the same apparatus and Figures 3 and 4 show details.
- a preferred construction embodying the invention comprises .a metallic transformer casing having a portion l enclosing the high-tension transformer and a hollow extension, head-piece or pedestal Qthrough which pass the insulated current conductors 8 and 9 leading to the XVI-ray' tube.
- the env-clope 3 of an X-ray tube 4 is provided with openings registering with openings in the top of the head-piece 2.
- the ends ofthe conductors 8 and 9 leading from the transformer extend into the openings in the envelope 3 of the X-ray tube and are provided with terminals forming transformer contact terminals adapted to contact with cooperating contact terminals on the X-r ay tube as described below.
- the attachment of the tube is effected with the aid of coupling nuts 5 and 6 which are screwed on to a projecting rim 7 of the' headpiece 2 as shown in Fig. 3.
- the transformer contact devices comprise insulating members 10 at the ends of the conductors 8 and 9. These insulating members carry at their end contact members which cooperate withthe Vcontact members secured to the poles of the tube.
- this electrical connection is shown in section in Figure l. lin this figure 11 is the end of the supply conductor of the anode.
- a resilient contact piece l2 is vsecured to the connecting piece l0 and comes into contact with the end l1 when the tube is mounted. Furthermore there is a pressure switch 13 which is included in the primary circuit of the transformer.
- rThis switch is closed by screwing on the nut 5 which depresses the pin la (see Fig. 3). Se long as this has not occurred no high voltage can consequently be applied to th-e connecting contacts and there is thus no danger Vof the operator receiving an accidental shock from the high-tension terminals of the transformer.
- a locking device of a switch in the primary circuit may be actuated by th-e securing member owing to which the closure of the circuit is only possible after the tube has been mounted.
- the securing device on the cathode-side is provided with la similar' switch l5 which serves another purpose.
- a resistance i6 which is included in the primary circuit of the transformer but which may be short-circuited with the aid of the switch l5.
- Such a nut is present with the tube for the operation of which the primary circuit ofthe transformer needs an eXtra-resistance (the resistance 16) so that the voltage applied to the tube is automatically adjusted at the required value. lt is evident that this device may be extended at will with more such contact devices so that different combinations are possible. Such devices may also serve to adjust the voltage on the incandescent cathode at different values.
- the head-piece 2 carries a table l? having secured to it instruments i8 for making crystallographic diagrams, for example according to the method Bebye-Scherrer. riihese instrumentsvarefslidable, over project ing arms i9V and, if required, they can be removed therefrom. .ihe X-ray tube fl has two windows 2O and 2l for the passage of the rays to the outside.
- 'A fan 22 mounted together with a driving motor 23 within trie head piece :2 serves to cool the Xl-ray tube. Air is drawn-in by this fan through a screen Q-t and blown through an air channel into the space comprised between the X-ray tube and the envelope surrounding tlie latter. The air current passes then along the anodetsee the arrows) and liiids at the end of the envelope an opportunity to reach the outs ⁇ le by passing through apertures 2G. Simultaneously with the transformer, the motor 23 is connected to the a ⁇ failable networl so that it requires no separate switch.
- An X-ray installation comprisingafcas-. ing including jan extension, a transformer enclosed in said casing having a primary Vlowi tension winding'and a secondaryhigh-tension winding, Pa conductive envelopeY detachably 'plus 1 is' 0f the" secondary windingfof, the ,transformer to the" transformer casing-.so that-'relatively to the@ casing,-
- said. envelope insulated conductors leading extension ofthe casing connecting ythe 'transl -formerwithv the Xraytube,ineans for estabmounteden4 extension, anlX-raytubezin from. saidsec'ondary winding, through-.said f 'i n vli'shjinga mechanicalconnection betweenv said envelope.
- saidA extension' including co axial rims ontheextension Aand the envelope "respectively and surrounding said'4 conclu@v ,7g a v said.primarywinding and-cooperatingrwith a part VofV the meansffor.mechanically 'sec-ur- "1 v ingy the conductive envelope to' theezitenslon v ofthe casingso. asto be closed'when 4saidj 80,
- said insulated conductors project, ⁇ szsaid azbranach i tubes carrying,glandV ynutsv having aviiat shaped front surface" opposed #tothe end" ⁇ sur' f Y. facefoffthe head-piece?, and-said apertures be!v 95 Y ing surround'edbyxathreaded flangefiitting said gland-r nuts, Land. a ,-'pushlbutton switch connectedwinfseries with' ⁇ said primary Wind;v l 1 ingland-imounted at the side ofone ofthe-up- 'ff offthe head-piece zand Lproj'ect-.
- Ane X-ray f in tallation'fer utiliz'ing closedirinl aconductive' envelope, means for 'pedestal and means 'including electric; coniv either oftwoLlX-raytubes.designed 'for differrv,en'tl'oper'ating 1'voltages'comprisinga transl f former.' hayingga primary.. lowtension Winde i y ing and ⁇ fa secondary highftension"windingg'a meer@eine@nominees 'same andler 1.. l I l ing. supportingpedestal,- Van X-raytubeenr A 1 3.
- a transformer having a primary low-.tension winding and a secondary high-tension winding a metal casing for said transformer including a supporting pedestal, an X-ray tube enclosed in a conductive envelope, means for securing said envelope to said supporting pedestal and means comprising insulated electric conductors disposed in said supporting pedestal for connecting the X-ray tube to said secondary winding, said first means comprising upright threaded rims on the supporting pedestal and gland nuts cooperating with said rims and carried by the conductive envelope of the tube, the ends of said insulated conductors leading ,through said rims and gland nuts when a tube is operatively secured to said supporting pedestal, a resistance connected in series with the primary winding of said transformer and disposed within said supporting pedestal and a pushbutton switch for short-circuiting the same, said push-button switchbeing mounted on said supporting pedestal adjacent one of said upright
- a metal casing including a hollow head-piece having an apertured top portion, a transformer within said casing and having terminals, a conductive envelope, an X-ray tube in said envelope, said envelope having tubular extensions in oooperative relation with the apertures in the top portion of said head-piece, insulated conductors disposed within said head-piece andleading through said apertures and tubular extensions and connected to said terminals of the transformer, and conductive means for connecting said terminals with the X-ray tube.
- An ⁇ lil-ray apparatus comprising a transformer, a metal casing enclosing the same and including a hollow head-piece, a substantially cylindrical X-ray tube, a conductive envelope therefor having a restricted waist portion and enlarged end portions, supports at the waist portion and two end portions of the envelope to'support the latter on the head-piece of the transformer casing and insulated supply conductors disposed in said hollow head-piece and connecting said X-ray tube to the transformer.
- An X-ray installation for utilizing either of two X-ray tubes designed for different operating voltages comprising a transformer having a primary low-tension winding and a secondary high-tension winding, a metal casing enclosing said transformer and including asupporting pedestal, an X- ray tube enclosed in a conductive envelope, means including conductors for connecting said X-ray tube to the secondary winding of said transformer when the envelope of the tube is mounted on said supporting pedestal, means connected with the primary winding of said transformer for varying the voltage to be applied to the tube and cooperating means on said envelope and pedestal for controlling said voltage-varying means.
- An X-ray installation for utilizing either of two X-ray tubes designed for different operating voltages comprising a transformer having a primary low-tension Winding and a secondary high-tension winding, a metal casing enclosing said transformer and' including a supporting pedestal, an X-ray tube enclosed in a conductive envelope, means for securing said envelope on said supporting pedestal, means including electric conductors disposed in said supporting pedestal for connecting the X-ray tube to said secondary winding, said first means comprising a fastening member on the conductive envelope ofthe tube, a resistance connected in series with the primary winding of said transformer and a' switch for shortcircuiting said resistance, said switch being mounted on said supporting pedestal adjacent the fastening member of the tube envelope, said fastening member being so shaped that it does not actuat-e said switch when the envelope is attached to the pedestal.
Description
July 4, 1933.` A. BoUwERs Er AL X-RAY APPARATUS Filed Oct. l5, 1931 3 Sheets-Sheet 1 July 4, 1933. A BOUWERS .ET AL 1,917,090
XRAY APPARATUS Filed OCT.. 15, I 1951 3 Sheet-Sheet 2 July 4, 1933. A. BoUwERs ET Al.
X-RAY APPARATUS Filed Oct. l5, 1951 3 SheetS-Shee'l 3 V VA ma LANDS i The invention conceinslan'apparatusjwhieh 'is Vpartieularly .suitable' forV the Vradiological examinationnf thev structure; of o i'ystals. The: apparatus-may, however, loefutilized` 'forj- Inanyothei', purposesbothfin the `field yo ffthe testing oi'inaterialsandoftherapeutics.,
` TheA apparatus according [to f. theinizent'ion l essentially Cons'ists'of apatfeoniprisinga i' transformen 'are united.: 1 'Tiv seemed .atopenings iffitheheadepc 'ofthe' `transformereasejand'ofthefenielope'iof they;
'v soyuna tube;,whiehfopenings ai-'e in alinement,A.l @ne The'head-piece of.the'tiansfornar easing;vl 1n ay he; employed "for enclosing Y an; eleetrio .niotoiiwithafan foizthe'coolingo thev yXjray tube. .The apparatus I nay'beequi terchan'geable tubes fon different-voltages and appropiate value of the', Voltage,ff The tact that the tube and' thev -Ltrans'foijnierr case are A.rnhned in 'the' manner `as above described V'so asftoV forinf'arenders it possible "to employ a devioepby'meansfof Whiohgthe ad.-
justment of the'coi'reetyoltageisff'autoniatii` v'iees tothe tubes', owing-to mutual deviation in their feonstruetion,bringfthe ldeuioe'j for switching-inthe; 'jdiierent Volt'agesjfintof the for" the' eleoti'io .Connection of the tubes-fidi the 'einde `a headpi'eoe WhiChemjiies `the Xrfa'y tuhefand eneloses conducto-rs, leading.` from 1 thetiansforinetothe points-fontheattaol Y inentfofthetube; This.attaehmentinayffbe" ppe v,width j Inf-order to prevent-'the c on'neot be provided WithV adeviceV for adj listingV the Voltagef this'pos j lThis is Y-ee'etedfinfa,sinoplenanne .viding the 'devices; for theeonneetion to the n fixed Lpart;V (this .should be;understoodzt'oineanf that part ofthe appaxfatuswhich contains;
the transformer) f vvthV one "or Inoie members,
i'Which-,-Whenfthetubes aremounted, maybe actuated by thef means l of Y fattaehnjientglwith `-vi'vhi'eh'lthe; tubes areprovided, and ,b 'off I nernb frfee andfdoes not pushl-it inwards; i
Xing-means andztheclosure of iivhieh isloifoug'g'hdi-, 1V
-aboutffolienderedlpossible,whenthejitubes alfegb'eing mounted-',gby"adevicezeonnected cally enacted; infact, the'device 'for adiilisti fthem'eansfor thefattachment" ,ing the diffeent-Yoltagesmay be combinediA with the means A'for ytheV attachment-of 1the 'tubeV in suChfmanne 1"-` the Connectingde- -ioo in section, in a vertical position, the tube being parallel to the plane of the drawings.
Figure 2 represents, likewise partly in section, a lateral elevation of the same apparatus and Figures 3 and 4 show details. Y As shown in the drawings, a preferred construction embodying the invention comprises .a metallic transformer casing having a portion l enclosing the high-tension transformer and a hollow extension, head-piece or pedestal Qthrough which pass the insulated current conductors 8 and 9 leading to the XVI-ray' tube. The env-clope 3 of an X-ray tube 4 is provided with openings registering with openings in the top of the head-piece 2. The ends ofthe conductors 8 and 9 leading from the transformer extend into the openings in the envelope 3 of the X-ray tube and are provided with terminals forming transformer contact terminals adapted to contact with cooperating contact terminals on the X-r ay tube as described below. i f
The attachment of the tube is effected with the aid of coupling nuts 5 and 6 which are screwed on to a projecting rim 7 of the' headpiece 2 as shown in Fig. 3. The transformer contact devices comprise insulating members 10 at the ends of the conductors 8 and 9. These insulating members carry at their end contact members which cooperate withthe Vcontact members secured to the poles of the tube. For the anode terminal of the tube this electrical connection is shown in section in Figure l. lin this figure 11 is the end of the supply conductor of the anode. A resilient contact piece l2 is vsecured to the connecting piece l0 and comes into contact with the end l1 when the tube is mounted. Furthermore there is a pressure switch 13 which is included in the primary circuit of the transformer. rThis switch is closed by screwing on the nut 5 which depresses the pin la (see Fig. 3). Se long as this has not occurred no high voltage can consequently be applied to th-e connecting contacts and there is thus no danger Vof the operator receiving an accidental shock from the high-tension terminals of the transformer. instead of the switch 13 a locking device of a switch in the primary circuit may be actuated by th-e securing member owing to which the closure of the circuit is only possible after the tube has been mounted.
The securing device on the cathode-side is provided with la similar' switch l5 which serves another purpose. Within the head 2 is arranged a resistance i6 which is included in the primary circuit of the transformer but which may be short-circuited with the aid of the switch l5. By screwing-on the nut 6, the pin terminating this switch at the top is pushed-in. This movement does not take place however, when the coupling nut has the shape shown in idigure 4l. `The nut represented inthis figure has a groove to receive the pin of the switch l5 so that the latteris not actuated whenfor the attachment of the tube the nut is screwed-on. Such a nut is present with the tube for the operation of which the primary circuit ofthe transformer needs an eXtra-resistance (the resistance 16) so that the voltage applied to the tube is automatically adjusted at the required value. lt is evident that this device may be extended at will with more such contact devices so that different combinations are possible. Such devices may also serve to adjust the voltage on the incandescent cathode at different values.
For a radiological examination with X- rays emitted by a tungsten anti-cathode, a higher tension across the electrodes is clevsir'ed than with the use of a tube in which the active surface of the anode consists of copper. .The securing device of a tube-'of the latter kindis consequently such that the resistance Y l@ serving to reduce the voltage remains included in the primary circuit. When mounting tubes of the former hind, on the contrary, this resistance must be sliort-circuited and for this reason the groove in nut 6 is omitted with these tubes. l
The head-piece 2 carries a table l? having secured to it instruments i8 for making crystallographic diagrams, for example according to the method Bebye-Scherrer. riihese instrumentsvarefslidable, over project ing arms i9V and, if required, they can be removed therefrom. .ihe X-ray tube fl has two windows 2O and 2l for the passage of the rays to the outside.
'A fan 22 mounted together with a driving motor 23 within trie head piece :2 serves to cool the Xl-ray tube. Air is drawn-in by this fan through a screen Q-t and blown through an air channel into the space comprised between the X-ray tube and the envelope surrounding tlie latter. The air current passes then along the anodetsee the arrows) and liiids at the end of the envelope an opportunity to reach the outs` le by passing through apertures 2G. Simultaneously with the transformer, the motor 23 is connected to the a` failable networl so that it requires no separate switch.
lt appears from the above that the appav before beingableto. openl this cover. *1
l when Vthel cover fga'ffording-' accessi lthe` spaceenclo'sedb-y-the head 2 is 0penedj,;there is 'no risk vof coming intofcontact v vithparts under 'high tension. owing to the that ,the
conductors leading .from they transformer to the connecting devices forth-is tensio-nQa-re .in-a s ulated.v Besides, owing tof-the fact'that the Contact plug 28 `jfor thegelectricaly connection of the apparatus isylocatedin frontfof the cover 27 onejis obligedto., remove this t advantageous to connect themid-p'ointvr which during; the operation ofthe.
apparatus is connected to earth, each kOffq-the transformer .pole'spossess'es'4 h-al'fthef voltage existing across the electrodes Aofi thetuber'v a Whatweclaini 'f on the transformercasing, 'circuit-controls ling means in circuit'witlijsaid transformer vmountedfon the transformercasing. f
2. Incombination, -a'high-,voltage ytrans-Q former, a'metallcas'ing for said transformen@` an -X-rayftube, a :conductive envelope sur-I rounding the same, .Contact members connectand ymeans for 'detachablysecuring said X ray, tube to said. transformer casing V with ,the termin als ,ofi said ytube in engagementfwithjV the transformen .terminal's,fsaidj; securing'- means being arranged to control said .,circuit-- controlling` means when `the r`'-X-ray tube is ed'` with .the tube, Acontact membersgfand'- insulated;. ;conductors connecting the same. withv j the transfo'r-mer, said' -first contact'members` cooperating'` withy said second' contact mem-` bers, and' means for mechanically securing.'v the'envelope ofthertube to the'fcasing `ofjthe transformer, said means [comprising :threadj ed rims and coupling nuts surrounding said insulatingconductors; S' f casing. therefor'including a- 'hollow headpiece, Sa "conductive'e'n-velope, an' X-ray tube lenclosed bythe lsaine and' in partial' yspaced relations therewith, Isaid f envelope being mounted on said g head-piece, means detach; ably connecting said envelope with said head-` piece, insulatedconductors connecting said4 VX-ray `tube ywith vsaid*l transformen/means comprising an'felectrically v drivenjfan withinV saidA head piece anda coimmunic'ating,tubel v'between said fan andf-the inter-space ,be-r tween the X-ray tube vand its envelope.'l Y` .4. An X-ray installation comprisingafcas-. ing including jan extension, a transformer enclosed in said casing having a primary Vlowi tension winding'and a secondaryhigh-tension winding, Pa conductive envelopeY detachably 'plus 1 is' 0f the" secondary windingfof, the ,transformer to the" transformer casing-.so that-'relatively to the@ casing,-
said. envelope," insulated conductors leading extension ofthe casing connecting ythe 'transl -formerwithv the Xraytube,ineans for estabmounteden4 extension, anlX-raytubezin from. saidsec'ondary winding, through-.said f 'i n vli'shjinga mechanicalconnection betweenv said envelope. and saidA extension' including co axial rims ontheextension Aand the envelope "respectively and surrounding said'4 conclu@v ,7g a v said.primarywinding and-cooperatingrwith a part VofV the meansffor.mechanically 'sec-ur- "1 v ingy the conductive envelope to' theezitenslon v ofthe casingso. asto be closed'when 4saidj 80,
tors,fand la switch connected," in' serieswith connection isA made. 1
y Y5. AnfX-rayinsaiiaaon empfang-fa Cas-.
I ing.including aheadfpiece, agtransformer en-if v i closedthereby having a primary .lowte`n`sio'n j.A 5 f' v 4windinandxa secondary high-tension wind-v f ing,fan ray tube, anenclosing envelopefor.
said saidk secondary winding through rsaid'y headV` piece and electrically connectingtheftrans- OrmerjWith the *Xerayltuba said nvelopeeg.O
inch; said insulated conductors project, `szsaid azbranach i tubes carrying,glandV ynutsv having aviiat shaped front surface" opposed #tothe end"`sur' f Y. facefoffthe head-piece?, and-said apertures be!v 95 Y ing surround'edbyxathreaded flangefiitting said gland-r nuts, Land. a ,-'pushlbutton switch connectedwinfseries with'` said primary Wind;v l 1 ingland-imounted at the side ofone ofthe-up- 'ff offthe head-piece zand Lproj'ect-. '100 r nr inthe'direction of the airis :of v the .ass( )jcfiated:glandy -nutfgs' Vas to be pushed a f inloy the ring-shaped front surface ofisaidY iss'c'rewed on'the 'fright rim-S ling therefgl nd @nut when the s latter vupright'threaded-rim.- 'ff 2 6'.. Ane X-ray f in tallation'fer utiliz'ing closedirinl aconductive' envelope, means for 'pedestal and means 'including electric; coniv either oftwoLlX-raytubes.designed 'for differrv,en'tl'oper'ating 1'voltages'comprisinga transl f former.' hayingga primary.. lowtension Winde i y ing and` fa secondary highftension"windingg'a meer@eine@nominees 'same aneinander 1.. l I l ing. supportingpedestal,- Van X-raytubeenr A 1 3. Incombinatioma transfo rmer,"a,metalll :",ductorsdisposed insaid supporting'pedestalv I' n `for*connecting*the X-ray tube to s aidfsec-A f1 1 `ondary `wmding',fsaid -iirst means comprising afastening,memberion-theconductive enve-jv lopeof the tube, ya resistance connected in se- 7129 rieswith the primarywinding of saidftransT 5 formery anddisposed vin said supportingpedf estalandrgaswitch for' short-circuitingthe- ,v same, said switch being mounted Von. the said Asupporting pedestal adjacent'thefastlfigi,y "il member of :the tube envelope so.y as. yto -be pedestal. f f
movedtoitsclosedpositionby the'fas'tening. -y -mem'bertwhen sa'idjenvelopeis'attachedvto.they ,p 1 .l
130l f i' tube, .insulated conductors :leading lfrom either of two X-ray tubes. designed for different operating voltages comprising a transformer having a primary low-.tension winding and a secondary high-tension winding, a metal casing for said transformer including a supporting pedestal, an X-ray tube enclosed in a conductive envelope, means for securing said envelope to said supporting pedestal and means comprising insulated electric conductors disposed in said supporting pedestal for connecting the X-ray tube to said secondary winding, said first means comprising upright threaded rims on the supporting pedestal and gland nuts cooperating with said rims and carried by the conductive envelope of the tube, the ends of said insulated conductors leading ,through said rims and gland nuts when a tube is operatively secured to said supporting pedestal, a resistance connected in series with the primary winding of said transformer and disposed within said supporting pedestal and a pushbutton switch for short-circuiting the same, said push-button switchbeing mounted on said supporting pedestal adjacent one of said upright rims, so as to be pushed in by the corresponding gland nut of said tube envelope. y
8. ln combination, a metal casing including a hollow head-piece having an apertured top portion, a transformer within said casing and having terminals, a conductive envelope, an X-ray tube in said envelope, said envelope having tubular extensions in oooperative relation with the apertures in the top portion of said head-piece, insulated conductors disposed within said head-piece andleading through said apertures and tubular extensions and connected to said terminals of the transformer, and conductive means for connecting said terminals with the X-ray tube. Y i
9. An `lil-ray apparatus comprising a transformer, a metal casing enclosing the same and including a hollow head-piece, a substantially cylindrical X-ray tube, a conductive envelope therefor having a restricted waist portion and enlarged end portions, supports at the waist portion and two end portions of the envelope to'support the latter on the head-piece of the transformer casing and insulated supply conductors disposed in said hollow head-piece and connecting said X-ray tube to the transformer.
10. An X-ray installation for utilizing either of two X-ray tubes designed for different operating voltages comprising a transformer having a primary low-tension winding and a secondary high-tension winding, a metal casing enclosing said transformer and including asupporting pedestal, an X- ray tube enclosed in a conductive envelope, means including conductors for connecting said X-ray tube to the secondary winding of said transformer when the envelope of the tube is mounted on said supporting pedestal, means connected with the primary winding of said transformer for varying the voltage to be applied to the tube and cooperating means on said envelope and pedestal for controlling said voltage-varying means. Y
l1. An X-ray installation for utilizing either of two X-ray tubes designed for different operating voltages comprising a transformer having a primary low-tension Winding and a secondary high-tension winding, a metal casing enclosing said transformer and' including a supporting pedestal, an X-ray tube enclosed in a conductive envelope, means for securing said envelope on said supporting pedestal, means including electric conductors disposed in said supporting pedestal for connecting the X-ray tube to said secondary winding, said first means comprising a fastening member on the conductive envelope ofthe tube, a resistance connected in series with the primary winding of said transformer and a' switch for shortcircuiting said resistance, said switch being mounted on said supporting pedestal adjacent the fastening member of the tube envelope, said fastening member being so shaped that it does not actuat-e said switch when the envelope is attached to the pedestal. ln testimony whereof-we have signed our names to this specification.
' ALBERT BOUWERS.
WILLEM HONDIUS BOLDINGH.
llO
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL53876A NL33315C (en) | 1930-10-11 | 1930-10-11 | roentgen appliance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1917090A true US1917090A (en) | 1933-07-04 |
Family
ID=1796878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US569090A Expired - Lifetime US1917090A (en) | 1930-10-11 | 1931-10-15 | X-ray apparatus |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US1917090A (en) |
| DE (1) | DE606038C (en) |
| FR (1) | FR723897A (en) |
| GB (1) | GB379540A (en) |
| NL (1) | NL33315C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2808517A (en) * | 1951-02-13 | 1957-10-01 | Gen Electric | X-ray tube housing |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE767887C (en) * | 1937-03-06 | 1954-08-02 | Alphonse Ferdinand Pieper | Roentgengeraet with a swiveling housing which encloses the Roentgenroehre and the transformer assigned to it |
-
1930
- 1930-10-11 NL NL53876A patent/NL33315C/en active
-
1931
- 1931-10-06 FR FR723897D patent/FR723897A/en not_active Expired
- 1931-10-08 GB GB27967/31A patent/GB379540A/en not_active Expired
- 1931-10-10 DE DEN32784D patent/DE606038C/en not_active Expired
- 1931-10-15 US US569090A patent/US1917090A/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2808517A (en) * | 1951-02-13 | 1957-10-01 | Gen Electric | X-ray tube housing |
Also Published As
| Publication number | Publication date |
|---|---|
| GB379540A (en) | 1932-09-01 |
| NL33315C (en) | 1934-08-15 |
| FR723897A (en) | 1932-04-16 |
| DE606038C (en) | 1934-11-23 |
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