DE1198483B - Switching arrangement for locking a target device or fluoroscopic screen in X-ray devices - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. α .;

Number:
File number:
Registration date:
Display day:

A61b

German class: 30 a -6/01

1198483
C31436IXd / 30a
November 12, 1963
August 12, 1965

The present invention relates to a switching arrangement for locking the longitudinal, transverse and Depth shift of a target device or fluoroscopic screen on motorized adjustable examination tables of X-ray machines in which the locks are on the one hand operated by hand and on the other hand, are effected by switching means which act automatically during the recording.

The examination tables of X-ray machines usually have an electromagnetic lock, which is usually connected in such a way that it is possible on the one hand to automatically control the depth movement of the To lock the target device or fluoroscopic screen, that is a movement perpendicular to the plane of the Examination table for the patient, on the other hand, the longitudinal movement of the target device or at the same time Transmitting screen in a direction parallel to the longer sides of the examination table lock, as well as the transverse displacement in a direction parallel to the shorter side of the examination table (the so-called cross lock).

During the recording, both locking devices are automatically switched on at the same time. However, if the lock is made, it is not possible without risk of damage of the electric motor for the advance of the target device or fluoroscopic screen, the longitudinal displacement of the target device or fluoroscopic screen. If the doctor has one Examination table with locking switched in this way, the target device or the fluoroscopic screen wants to move, he must release both locking devices to move forward the required distance and then turn on both locking devices again.

These known locking switch arrangements have the following disadvantages: a) If the doctor is in front of the longitudinal advance of the target device or fluoroscopic screen or the motorized examination table during the exposure to lock the depth feed Forgets to loosen, the patient's body may become trapped (as far as that The longitudinal feed does not switch on automatically when the deep feed is locked blocked).

b) The doctor can accidentally switch on the feed of the target device or fluoroscopic screen or the motorized examination table during the recording, so that the electric motor is overstrained for the feed when locking at the same time
Target device or fluoroscopic screen
X-ray machines

Applicant:

Chirana Praha, närodni podnik, Prague
ίο representative:

Dipl.-Ing. A. Spreer

and Dipl.-Phys. Dr. W. Junius, patent attorneys,

Hanover, Abbestr. 20th

Named as inventor:

Mnata Brozek, Modfany (Czechoslovakia)

_ao claimed priority:

Czechoslovakia from November 13, 1962
(6386)

so that it is necessary to repeat the recording (if the possibility of switching on the feed is not automatically blocked during the recording).

c) When moving the target device or fluoroscopic screen or the examination table longitudinally The doctor has to carry out a total of six actions with the patient (i.e. switching off two locking devices, switching on the feed, switching off the feed and switching it on again of two locking devices).

The present invention provides a switching arrangement for locking the target device or Fluoroscopic screen in X-ray machines that avoids these disadvantages.

The invention consists in the arrangement of relays, which have a common when receiving Automatically opening contact as well as via an optionally manually operated contact for longitudinal displacement the table or the target device serving switching means are connected to a circuit and Have contacts in series with the manually operable, locking switching means parallel to the contacts connected in series and the switching means, the

509 630/27

would automatically take the locking effecting switching means are arranged.

When switching on the lock according to the present invention, it is sufficient if the doctor during the longitudinal advance of the target device or fluoroscopic screen or the examination table only performs two actions with the patient, namely switching the Feed and no longer the six actions previously necessary.

An exemplary embodiment of the subject matter of the invention is shown in the drawing.

In the circuit that z. B. is fed by direct current of 24 volts voltage, the coils are from three electromagnets switched, which lock the feed of the target device or fluoroscopic screen secure by means of known and therefore not described in detail mechanisms. It is this on the one hand the coil 1 of the electromagnet for locking the depth feed, the coil 2 of the ao Electromagnet for locking the longitudinal feed and the coil 3 of the electromagnet for the Locking of the cross feed. Voltage is applied to coil 1 after the manual pushbutton is depressed created for locking the depth feed, which controls contact 4. To the others Coils 2 and 3, voltage is applied by depressing the hand push button for the cross lock, which controls contact 5.

The advance of the motorized table is controlled by hand-operated toggle buttons, one of which the contact 6, the second the contact? controls. By the contact 6 controlling Push button will move the examination table down and through the contact 7 The upward movement of the examination table is switched on (the Direction downwards and upwards refers to the vertical position of the examination wall). At the Switching the contact 6 receives the relay 8 voltage, which is a direction of movement of the electromagnet switches on for the advance of the examination table and at the same time the contact 10 interrupts, whereby the feed lock is switched off. To terminate the advance of the Table it comes either by releasing the push button dominating the contact 6, or automatically by the action of the limit switch that controls contact 14. Similarly, by switching of the contact 7, the relay 9 is connected to voltage, which reverses the direction of rotation of the electric motor switches on for the advance of the examination table and at the same time opens contact 11, which in turn switches the feed lock in both directions. To end the Movement of the motorized examination table in the downward direction is necessary through the push button again to switch the contact 7, if necessary this happens automatically by opening of contacts 15 or 16, which are controlled by the limit switches, the effect of which depends on the location of the Examination wall is dependent. For the sake of completeness, it should be noted that contacts 15 or 16 can alternatively be brought into operation according to the current position of the wall, whereby by Combination of their function is the further advance of the motorized table over the edge of the wall is made possible in a position other than vertical or this close to the wall. It's not necessary, to give more details about this arrangement, as it is not related to the actual subject matter of the invention.

The longitudinal advance of the target device or fluoroscopic screen is controlled either by a manual switch controlled, who dominated the contacts 17, 18, after their closing either to the relay 19 or to the relay 20 voltage is applied.

The relay 19 switches a direction of movement of the electric motor for longitudinal advance of the target device or fluoroscopic screen and at the same time opens the contact 12, while the relay 20 the opposite Direction of movement of this electric motor switches on, and at the same time the contact 13 opens. When the contact 13 is opened, the feed lock is automatically switched off.

The blocking of the possibility of switching on the feed of the motorized examination table or the target device or fluoroscopic screen during the exposure is ensured by the Contact 21 secured, which is dominated by the main exposure push button, which this Contact 21 opens at the moment of switching on the preparation for recording. The main position push button at the same time closes the contacts 22, 23, so that the coils 1,2,3 of the electromagnets Get voltage, the electromagnets respond and the depth, cross and longitudinal feed lock.

Claims (1)

Claim: Switching arrangement for locking the longitudinal, lateral and depth displacement of a target device or fluoroscopic screen on motorized adjustable examination tables of X-ray machines, in which the locks on the one hand by manually operable and on the other hand by at Recording automatically acting switching means are effected, characterized by relays (8, 9, 19, 20), which have a common contact that opens automatically upon admission (21) as well as via optionally manually operated, for longitudinal displacement of the table or the Target device serving switching means (6, 7,17,18) are connected to a circuit and contacts (10,11,12,13) in series with the manually operable switching means (4, 5) serving for locking lie, with parallel to the series-connected contacts (10,11, 12,13) and the switching means (4,5) which at dei Recording automatically the locking effecting switching means (22, 23) are arranged. 1 sheet of drawings 509 630/27 8.65 © Bundesdruckerei Berlin