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.

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    Date of Application, 17th Oct, 1887 Complete Left, 20th Feb., 1888 Complete Accepted, 4th May, 1888 /V/\ /% AA AAAAAAA/ l/VA/VA/1 A.D. 1887, 17</i October. N° 14.062. PROVISIONAL SPECIFICATION. Improvements in Automatic Medical Electrical Apparatus. I, Edgar Pullar of No. 11 Queen Victoria Street, London, E.C. Engineer, do hereby declare the nature of this invention to be as follows :— This invention relates to the production of automatic apparatus for the application of electrical currents to one or more persons for the purpose of restoring diminished 5 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 accordance with my invention I provide an ordinary galvanic battery of any suitable kind, in conjunction with with a coil or helix of wire, which may be either a primary wire for administering a direct intermittent primary current, or a secondary 10 wire may be wound upon the primary coil, in order to utilise an induced current of higher potential. The battery and coil with an automatic “ make and break ” contact of ordinary form may he enclosed in a case of any suitable shape and design. In order to prevent the wasting of the energy of the battery by the maintenance of 15 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, l arrange a slide of brass or other suitable metal terminating in a knob or handle forming one of the conducting poles of the improved apparatus. The handle afore¬ said upon being drawn out is arranged to vary the strength of the current according 20 to the degree to which said handle is drawn out, the current strength being determined by a graduated scale marked upon the slider above mentioned. Said slider, which is so arranged as to slide freely within suitable horizontal guides, is kept in its normal position by the tension of a spring, and may he made to operate either by pushing or by pulling against the tense spring, according to the requirements of the particular 25 type of apparatus. A contact block, spring, brush or equivalent makes contact with the slider, and completes the primary electrical circuit when the handle is slightly drawn forwards, or pressed inwards as the case may be. At the end of the slider is attached the magnetic core of the coil, so that the power of said coil, whether used as a primary 30 or induction coil, may be regulated by the proportion of the core inserted within, or withdrawn from the helices [I'rice 8cL] *