US1891139A - Portable high tension transformer - Google Patents

Description

Dec. 13, 1932. A. BQUWERS PORTABLE HIGH TENSI'ON TRANSFORIER original Filed July 1s, 192e 5 Je fa .9

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UNITED STATES PATENT o1-Fics ALBERT BOUWERS, OF EINDHQVEN, NETHERLANDS, ASSIGNOB T N. V. PHILIPS GLOEILAMPENFABRIEKEN, 0F EINDHOVEN, NETHERLANDS PORTABLE HIGH TENSION TBANBFORMER Urigmal application led July 13, 1928, Serial No. 292,390, and in the Netherlands August 5, 1927. Divided and this application led December 15, 1935.3 'Serial No. 502,523.

This invention relates to an electric apparatus comprising a portable transformer for high tension and forms a division of my application Ser. N o. 292,390 led July 13th,

Such an apparatus may for example be an X-ray installation in which a discharge tube for radiating X-rays is connected by means of flexible cables with a supply transformer.

In order to make the conveyance of the apparatus easier the cables may be detachable and a handle may be provided by means of which the transformer is carried.

An object of the invention is to simplify the construction of such a transformer.

Another object is a construction preventing that undesired articles penetrate into apertures of the envelope of the transformer during the conveyance.

A further object is to reduce the volume of such a transformer and to facilitate the fastening of the cables to the envelope.

Other objects will appear from the following description, in which reference is had to the accompanying drawing.

In this drawing Fig. 1 is a perspective side view of the transformer provided with a handle for conveyance and Fig. 2 is a section of an X-ray apparatus comprising a high tension transformer to which cables are connected.

Referring to Figure 2 the X-ray tube is designated by 1, high tension cables with a metal outer sheath by 2 and 3, the transformer by 4. The X-ray tube has a wall. comprising a glass part 5 and a metal part 6. The cathode of the tube is denoted by 13 and is surrounded by a focusing device 8. The X-rays emitted by the anticathode 7 leave the tube through window 9. The anticathode has connected to it a cooling rod 10 which also serves as a current conductor. The cathode 13 has leading-in wires 11 and 12 sealed in the pinch 14 forming part of the stem 15. One of these wires comprises a resistance 46. The glass parts of the tube are surrounded by insulating cylinders 18 which together with the tube are enclosed in a metal envelope 16.

An enclosing envelope 2() surrounds the transformer 4. The high tension winding of 'the transformer terminates at one side in bi-v polar contact members 33 and 34 between which a tension .prevails suiiicient for heating the incandescent cathode 13 of the tube and which are connected to the cathode by means of cable 3. At the other side the transformer winding terminates in contact member 36 designed to be connected with the anticathode 10 of the tube by means of cable 2.

The contact members 36, 33 and 34 are embedded in a block 19 of insulating material arranged in the envelope 20 and are located behind apertures in the cover of this envelope through which terminal pieces 22 and 24 of the cables 3 and 2 extend. The terminal piece 22 bears bipolar contact members 31 and 32 which engage the members 33 and 34. Thus the terminal piece 24 bears a bar shaped contact member 35 which is embraced by contact member 36.

In the same way the cables are connected to the poles of the tube by means of terminal pieces 21 and 23.

The terminal pieces 22 and 24 engage tightly the block 19 which has cylindrical humps 37 embracing members 22 and 24.

The apertures which permit the insertion of the cable ends into the housing 20 are surrounded by threaded nipples on which are screwed gland nuts 48. By these means the terminal pieces 22 and 24 are forced against the block 19 and the cables are rigidly fixed to the housing 20.

The other ends of the cables are likewise secured to the envelope 16 of the tube. When the apparatus is not in use the cables are removed and the apertures in the housing 20 shut off. For this purpose a special cover is provided consisting of a bracket 51. This bracket is constructed as a handle and on its ends gland nuts 53 are arranged which are screwed on the threaded nipples in the same way as the nuts 48.

After having disconnected the apparatus by unscrewing the nuts 48 and removing the cables, the operator places the carrying handle with its ends on the apertures in the cover of the housing and screws up nuts 53. The transformer is then ready for conveyance. At the same time'the apertures are shut o 100 and the danger that undesired articles get be interchan ably and lockingly into the envelope avoided.

For the purpose of grounding the apparaname to this specification.

tus during the operation the housing 20 of the transformer has a terminal 50.

What I claim is:

1. A transformer, comprising an enclosing envelope, a high tension transformer windin mounted therein, contact members dispose in said envelope and located behind apertures in the wall thereof, and in which contact members the high tension winding of the transformer terminates the said contact members being adapted to interchangeably and lockingly receive a handle and high tension cables, the said handle, when in position, closing the said apertures.

2. A transformer, comprising an enclosing envelope, transformer windings mounted in said envelope, contact members in which the high tension winding of said transformer terminates, the said contact members being disposed within said envelope and behind apertures in the wall thereof,'the said contact members being adapte'd to interchangeably and lockingly receive hi h tension cables and a substantially U-shape handle. a

3. A high tension transformer, comprising an enclosing envelope, transformer windings disposed in said envelope, and contact members disposed within said envelope and in which the high tension winding of the transformer terminates, the said contacts having threaded nipples adapted to interchangeably and lockinglyT retain high tension cables and a conveying handle.

4. A transformer, comprising an enclosing envelope having perforations therein, transformer windings in said envelope, contact members disposed beneath the perforations of the enclosing envelope and in which the secondary winding of said transformer terminates, a plate disposed in said envelope for supporting said contact members and provi ing recesses adapted for the reception of high tension cables, and threaded nipples provided on said envelope, above said plate, for interchangeably and lockingly receiving said cables and a handle.

5. A transformer adapted for interchangeably and lockingly receiving a conveying handle and high tension cables, comprising an enclosing envelope having perforations therein, transformer windings disposed in said envelope, contact members disposed in said envelope beneath said perforations and receiving the ends of the high tension windings of said transformer, insulatin terminal pieces at the ends of the cables an fitting in said perforations, contact elements on the said terminal pieces adapted for electrical connection with the contact members within the envelope, and gland nuts on both the cables and the handle whereby the latter may of the transformer is o ver said per orations.

In testlmony whereof I have signed my ALBERT BOUWERS.

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