Improvements in syringes / [Edward Bliss Wilder].

  • Wilder, Edward Bliss.
Date:
1903
Catalogue details

Licence: Public Domain Mark

Credit: Improvements in syringes / [Edward Bliss Wilder]. Source: Wellcome Collection.

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    N” 3781 A.I). 1903 Date of Application, 17th Feb.^ 1903—Accepted) 23rd Apr,, 1903 COMPLETE SPECIFICATION. Improvements in Syringes. I, Edwaiid Bliss Wilder, of the City of St Louis, State of Missouri, United States of America, Merchant, do hereby declare tlie 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: — 6 My invention relates to syringes and has for its principal objects to make the syringe self-charging, to secure a rapid action and to utilize the pressure of the liquid for expanuing’ the bulb. It consists in the parts and in the arrangement and combination of parts hereinafter described and claimed. In the accompanying drawings Figure 1 is an elevation of the complete K apparattus, and i’igure 2 is a vertical section of a part thereof. My device comprises a receptacle 1 of metal or hard rubber or other suitable material and is preferably rigid and of sufficient weight to sink when placed in a body of water. This receptacle has an opening preferably in its bottom. In order that the opening may not be obstructied, Avhen the receptacle rests upon 15 the bottom of the tank, the bottom of the receptacle is provided with a number of bosses or feet. The opening in the bottom is controlled by a valve 2 which consists of a disk of soft rubber or other suitable material adapted to rest upon the raised margin of the hole. A spider oir skeleton cage -1 fastened to the bottom inside of said receptacle surrounds said valve and serves as a guide and limiting stop therefor. Obviously, this valve 2 may be of any suitable type adapted to close automatically so as to be normally seated but adapted to yield automatically to pressure fro'm outside of the receptacle. The top of the receptacle is provided with a threaded opening in which is htted a threaded cap piece or plug. This threaded cap piece is provided with 25 tAvo hollow nipples which extend through said cap piece and have their out¬ wardly projecting ends adapted for connection to twm rubber tubes 6, 10. One of the nipples terminates inside of the receptacle near the top thereof and is connected by means of the rubber tube 10 to an elastic bulb 11. This bulbys, of the ordinary kind adapted to be squeezed or manipulated by hand and Tts 30 capacity is less'than the capacity of the receptacle above the opening into the dis¬ charge tube. The other nipple is connected by the flexible tube 6 to an ordinary discharge nozzle 7. This last mentioned nipple has its inner end prolonged nearly to the bottom of the receptacle and is equipped (preferably in its externally projecting portion) with a valve seat upon which seats an ordinary check valve 8 35 arranged to open upwardly automatically to permit the discharge of liquid, and to seat automatically when the pressure from the inside is relieved. By this arrangement, the nipple constitutes the lower portion of the discharge passage¬ way or tube, whose lower opening is close to the bottom of the re'ceptacle. The operation of the device is as follow’s: the receptacle 1 is immersed in the 40 liquid to be injected and the pressure bulb 11 is squeezed by hand to drive the air therefrom. So long as the pressure bulb is collapsed, the liquid which enters the receptacle from below can rise only a short distance aboA^e the open- in into the discharge tube. The ditference between the leAmls of the liquid inside and outside of the receptacle causes an upAvard pressure on the air con- fined in said receptacle. When the hand pressure on the bulb is released, the [Price 8of.(|