Improvements in automatic medical electrical apparatus / [Edgar Pullar].

  • Pullar, Edgar.
Date:
1888
Catalogue details

Licence: Public Domain Mark

Credit: Improvements in automatic medical electrical apparatus / [Edgar Pullar]. Source: Wellcome Collection.

    3/6 (page 3)
    Pullars Improvements in Automatic Medical Electrical Apparatus. COMPLETE SPECIFICATION. Improvements in Automatic Medical Electrical Apparatus. I, Edgar Pullar of No. 11 Queen Victoria Street London E.O. Engineer do hereby declare the nature of this invention and in what manner the same is to be performed, to be particularly described and ascertained in and by the following statement:— 5 My invention relates to the production of apparatus for the automatic application of electrical currents to one or more persons for the purpose of restoring diminished nerve power, and for the electrical treatment of disease generally, and has also for its object the conservation of the energy of the battery when not in use. In order that my invention may be the better understood I have appended the accom- 1( panying sheet of drawings in which Figure 1 is a side elevation and Figure 2 an end elevation of the improved apparatus according to my invention exposing to view the internal arrangement of the mechanism and Figure 3 illustrates a portion of a box or case provided with a lever pull. In carrying out my invention I provide one or more cells B of an ordinary galvanic 15 battery of any suitable type in conjunction with a coil or helix of wire 0, which may be either a primary wire for administering a direct intermittent primary current, or, a secondary coil may be wound upon the primary coil, in order to utilize an induced current of higher potential. The battery B and coil C with an automatic make and break contact D of any ordinary type may be enclosed in a case A of suitable shape 20 and design. In order to prevent the wasting of the energy of the battery by maintenance of a closed circuit when a current is not required, and further to obviate the liability to probable damage to, and consequent exhaustion of the battery by meddlesome people, I arrange a slider E preferably rectangular in section of brass or other suitable 25 conducting material terminating in a knob or handle e to serve as one ot the con¬ ducting poles of the improved apparatus. The handle e and slider E aforesaid upon being drawn out, are arranged to vary the strength of the current according to the degree to which said handle e and slider E, are drawn out, the current strength being determined by a graduated scale d marked upon one ol the surfaces of the rectangular 30 slider E above described. Said slider E, which is arranged to slide freely within horizontal guides is kept in its normal position by the tension of a spring a and may be made to operate either by pushing in or by pulling out against the tense spring according to the particular type of apparatus adopted. A contact block, spring, brush or equivalent F makes contact with the slider E by 35 by means of the arm or pin, 5, and completes the primary electrical circuit when the handle e is slightly drawn forwards or pressed inwards as the case may be. At the end of the slider E is attached the magnetic core of the coil, so that the power of said coil, whether used as a primary or induction coil, may be regulated by the proportion of the core inserted within or withdrawn from the helices. 40 Upon, or in combination with the slider E above referred to, is pivoted or hinged a pawl, catch or equivalent G, which locks said slider E in its normal position between