US1215698A

US1215698A - Fire-extinguisher.

Info

Publication number: US1215698A
Application number: US7220716A
Authority: US
Inventors: George T Pearsons
Original assignee: Individual
Current assignee: Individual
Priority date: 1916-01-15
Filing date: 1916-01-15
Publication date: 1917-02-13
Anticipated expiration: 1934-02-13

Description

e. T. PEARSONS.

FIRE EXTINGUISHER.

APPLICATION FILED JAN-15.19MB.

Patented Feb. 13, 1917.

5] vwam foz WV u L w W m Q m. w m n% GEORGE T. PEABSONS, OF NEW YORK, N. Y.-

FIBE-EXTINGUISHER.

Specification of Letters Patent.

Patented Feb. 13, 1917.

Application filed January 15, 1916. Serial No. 72,207.

To all whomz't may concern:

Be it known that I, Gnonon a citizen of the United.States, residing in the borough of Manhattan, city, county, and State of New York, have invented new and useful Improvements in Fire-Extinguishers, of which the following is a specification.

This invention relates to syringes in which a streain or jet of liquid is ejected from a' reservoir during each outward and inward movement of a piston, and it is the object. of the invention to provide improved meansmunicates. A piston is reciprocable in the cylinder by a hollow piston rod extending exterior of the cylinder and reservoir opposite to the discharge outlet, a tubeslidable in the cylinder outlet and extending into the hollow piston rod and reciprocable therewith serving to connect the cylinder with the reservoir outlet through the chamber, the liquid being discharged from the cylinder through ports in the piston rod and from the latter through the tube and chamber throughthe discharge outlet, the piston rod and the inner end of the tube being alternately connected with the cylinder at opposite sides of the piston through the opening and closing of the ports in the piston rod by the piston during the reciprocation thereof. 1 v

A further object of the invention is to provide in a syringe of this type means whereby the liquid is drawn into the cylinder from the lowermost part of the reservoir no matter in what position the discharge out let of the syringe may be; and to provide means to prevent access of the liquid to the cylinder when not in use and thereby prevent leakage through the discharge outlet of the contents of the reservoir.

Another object of the invention is to pro- -vide means whereby the liquid drawn from the reservoir into the cylinder and discharged therefrom before it is ejected is placed under pressure to increase the force 5 and efiiciency of the ejected stream.

In the drawing accompanying and form- T. PEARsoNs,

. ing a part of this specification Figure 1 is a sectional side elevation of a syringe showing an embodiment of my invention with the parts in normal position.

Fig. 2 is a sectional detail view of a valve for the suction inlet of the cylinder, and

-Fig. 3 is a detail sectional view showing modified means of securing the piston cylinder in the reservoir;

Similar characters of reference designate like parts throughout the difler'ent views of the drawing.

In the embodiment of my invention shown in the :drawing there is provided a tank or reservoir for'a fire extinguishing liquid consisting of a body portion 3, preferably cylindrical in shape, and the ends, 4 and 5 secured thereto, as by soldering or otherwise, the end 5 having a discharge outlet 6 and a filler opening closed by a plug 7, said plug being constructed with an inwardly opening and outwardly closing spring check valve to permit entrance of air to the reservoir to displace the liquid as it is ejected therefrom. The end 5 ispreferably dished to permit of the standing of the syringe upon a horizontal surface.

Mounted. in, the 'reservoir eccentric to the axis of the cylinder and adjacent one side is a piston chamber or cylinder 9 having inlets 10 and 11 with inwardly opening and outwardly closing check valves 12 and 13 adjacent opposite ends to connect the cylinder to the reservoir. The, cylinder extends from the end of the reservoir opposite the outlet 6 and is connected to the outlet 6 by a chamber 14 which is in the nature of a compression chamber for a purpose to be hereinafter described. A tube 15 slidably engages in a stufling box 16,i'1i the cylinder end, the said tube extending through a cap 17 into a hollow piston rod 1-8, the said cap being secured to and closing one end of the piston rod and to which cap the tube 15 is fixed. The piston rod extends through a stufling box 24 to the exterior of the cylinder and reservoir opposite to the outlet 6 and is reciprocated by a hand grip 19 fixed thereto. A piston head 20 having suitable packing to seal it in the cylinder is mounted on the piston rod 18 to have a limited to and fro movement between the cap 17, which is in the nature of an abutment, and an abutment or collar 21 fixed to the piston rod to thereby control the opening and closing of nately connect the piston rod and the tube with the cylinder at opposite sides of the piston at the commencement of each outward and inward stroke of the piston. The tube 15 is preferably centrally of the chamber 14 with the outlet 6 offset from the center of said chamber, a tube 25 being connected to the outlet 6, to connect the latter to the chamber 14. The area or diameter of outlet 6 is preferably less than the diametergof the tube 15.for a purpose to be hereinafter described.

In operation, assuming the parts to be in normal position'shown in Fig. 1, as the piston rod is pulled outward and with the tube 15 the piston rod will have a slight free movement independent of the piston and until the latter engages with the abutment 17 when it will movewith the piston rod,

- outlet.

the said piston closing the ports 22 and uncovering the ports 23. During this movement of the piston liquid will be drawn from the reservoir into the piston chamber through the inlet 10 in front of the piston, while the air at the back of the piston will be ejected through the ports 23 uncovered by the piston and through the piston rod and tube 15 into chamber 14 and from the latter through the tube 25 and discharge During the inward movement of the piston rod it will have a' slight free movement independent of the piston until it engages with the abutment 21, this movement of the piston uncovering the ports 22 and covering the ports 23, and during the inward movement of the piston the liquid previously drawn into the cylinder in front of the'piston will be ejected through ports 22, piston rod, and tube 15 into the chamber 1i and from said chamber through the tube 25 and discharge outlet 6. By having the tube 15 of greater diameter than the tube 25 the volume of liquid entering the chamber 14 will be greater than that which can be ejected through the tube 25 creating a pressure in the chamber H with the result that the liquid will be ejected through the tube 25 with increased force, and the outlet which is restricted with relation to the diameter of tube 25 will still further create a pressure and increase the force of the stream ejected from the outlet 6. During this forward movement of the piston liquid will be drawn into the cylinder in back of the piston. As the liquid is drawn from the reservoir it is displaced by air entering through the valved port in the plug 7 for the filler opening. I

The piston chamber is located at one side of the center of the reservoir and lies adjacent the side and which may constitute the top of the cylinder. To permit of the drawing of the liquid from the lowermostpart of the reservoir I provide a tube 26 extending longitudinally of and with its ends adjacent the ends and sides of the reservoir. This tube is connected by a branch tube 27 with a tube 28 connected at its ends to the inlets of the piston chamber to oscillate or swing on an axis longitudinally of the reservoir. To connect the tube 28 with the inlets of the cylinder the ends 28, 29 of the cylinder have an extended angle portion, as shown at 30, in which the cylinder inlets 10 and 11 are located and in which the ends of the tube 28 engage and are sealed by stufiing boxes 31. By this connection the intake tube 26 is adapted to swing on an axis centrally of the reservoir with the ends of the tube adjacent the side and opposite ends of the reservoir.

To permit of the discharge of the liquid from the reservoir in whatever position it may be held relative to a horizontal position the ends of the intake tube 26 are provided with valves. For this purpose the ends of the tube are formed to constitute seats for balls 32, the balls being carried by cages, in the form of caps 33, connected to the ends of the tube with the outer ends closed, said closed outer ends serving as supports for the balls 'when unseated. To permit entrance of the liquid through said cages to the tube they have lateral ports 3%, the cages being so proportioned that when the ball is unseated these ports will be slightly above the ball to prevent any possibility of the balls being drawn to their seats with the suction of the liquid. It will be obvious that should the discharge end of the reservoir be tilted down from the horizontal that the ball at the then upper end of the tube will be automatically seated closing said end of the tube and the ball at the then lower end of the reservoir will drop away from the seat and will be so supported as. to prevent the liquid drawing it to its seat.

The tube 15 extends to a point adjacent the operating handle 19, as shown, and during operation a siphonic action of the liquid is set up from the reservoir through the intake ports of the cylinder, the piston rod, the tube 15, the compression chamber 14 and the outlet, and after the'reciprocation of the piston has ceasedand should the liquid not have been entirely exhausted from the reservoir this siphonic action has a tendency'to be maintained; to break this siphon and stop the flow of liquid the piston rod is provided with an air intake valve. This valve is located in the operating handle 19 to normally close an opening in said handle communicating with the piston rod, and is in the nature of an outwardly closing and inwardly opening spring check valve, as shown at 35. This valve is normally-closed by its spring and in the operation of the syringe during the reciprocation of the piston the pressure of the liquid in the piston rod will tend to firmly seat the valve. However, as soon as reciprocation of the piston has ceased this valve will automatically unther flow of liquid to the cylinder being prevented by the valves in the intakes of the cylinder.

To facilitate assembling the cylinder heads 28, 29have recessed portions in which the ends of the cylinder engage, and it is preferably a tight or driving fit. Simultaneously with applying the cylinder heads the ends of the tube 28 are placed in position in the angular portions 30 of said heads. The chamber 14 is then connected-to the cylinder end 28. The whole is then assembled on the reservoir end 4 by extending a shouldered threaded end 40 of the cylinder head 29 through an opening in said end 4, and in which the stuffing box is located, when a nut 41, is applied to the threaded end 40 firmly clamping the piston mechanism to said end 4. The body portion 3 of the cylinder is then inserted within the flanged portion of the end 4, when the end 5 is applied with the chamber 14 in line with an opening 42 in said end. The outer end of this chamber 14 is internally screw threaded to receive thenozzle having the discharge outlet 6, with the tube 25 fixed thereto, which is preferably so constructed as to apply a wrench. After the nozzle is connected to chamber 14 it is soldered to the end 5 to preventany possibility of leakage, As stated, the end 5 is dished and may have a flanged portion 43 to engage over the end of the body portion of the reservoir. \Vith the parts thus assembled the ends 4 and 5 are soldered to the body portion 3.

In Fig. 3 there is shown a modification, and which maybe the preferred form, of the connection of the pumping mechanism to the end 4. In this instance the cylinder 9 has a driving fit in a bore of the cylinder head 29, said bore having a portion of the same diameter and a continuation of the cylinder bore and at the outer end internally screw threaded for the engagement of a flange with which the nut 41 is provided to clamp the end 4 between the cylinder head and the flange of the nut. The head 29 has a projection 36 to engage in a recess 37 in the end 4- to properly position the pumping mechanism. The nut 41 also carries the stuffing box 24 to seal the piston rod. By this construction the piston rod 18 with the piston mechanism may be withdrawn from the piston chamber 9.

Having thus described my invention I claim:

1. The combination of a cylinder having suction intakes adjacent opposite ends: a hollow piston 'rod projecting from one end of said cylinder and having an operating handle connected to said end and ports adjacent its inner end; a piston in the cylinder mounted on the piston rod to-be reciprocated thereby and having a limited free movement thereon during the initial outward and inward movement of the piston rod to control the opening and closing of the ports to alternately connect the piston rod with the cylinder at opposite sides of the piston; and a tube slidable in the cylinder end extending into the piston rod and reciprocable therewith, substantially as and for the purpose specified.

2. In a syringe, the' combination of a reservoir having a discharge outlet; a cylinder therein connected at opposite ends with the reservoir; a hollow piston rod extending from the reservoir opposite to the discharge outlet and having ports adjacent its inner end; a piston operable to alternatelydraw liquid from the reservoir .to opposite ends of the cylinder and control the opening and closing of the ports in the piston rod to discharge the liquid from the cylinder into the piston rod; a tube extending through the end of the cylinder into the piston rod and reciprocable therewith and means to connect said tube with the reservoir outlet to connect the cylinder through the piston rod and the tube with the reservoir outlet, substantially as and for the purpose specified.

3. In a syringe, the combination of'a reservoir having an outlet; a cylinder therein connected at opposite ends with the reservoir; a piston to reciprocate in the cylinder; a hollow piston rod extendingfrom the end 'of the reservoir opposite to the outlet; a

tube extending into the piston rod and reciprocable therewith, said tube being slidable in the cylinder end and connected with the reservoir outlet, and ports in the piston rod the opening and closing of which ports is controlled by the piston to discharge the liquid from the cylinder alternately from opposite ends of the piston through the piston rod and tube, substantially as and for the purpose specified. 1

4. In a syringe, the combination ofa reservoir having a discharge outlet in one to control the flow of liquid from the cylinder to the piston rod alternately from opposite ends of the piston, and a tube slidable in the cylinder end and reciprocable with the piston and piston rod to connect the cylinder through the piston rod with the discharge outlet, said tube fixed to and extending into the piston rod topa point adjacent the operating handle, substantially as and for the purpose specified.

5. In a syringe, the combination of a reservoir having an outlet; a cylinder therein connected with the reservoir adjacent opposite ends; a hollow piston rod extending from the reservoir opposite to the outlet and having an operating handle connected thereto; a piston reciprocable in the'cylinder; a tube reciprocable with the piston rod and connected with the reservoir outlet, said tube extending into the piston rod to a point adjacent the operating handle; and ports in the piston rod controlled by the piston to alternately discharge the liquid from the cylinder at opposite ends of the piston through the piston rod and tube, substantially-as and forthe purpose specified.

6. In a syringe, the combination of a reservoir having a restricted outlet; a cylinder therein connected adjacent opposite ends with the reservoir and having an outlet; a chamber to connect the cylinder andreservoir outlets; a hollow piston rod projecting' from the end of the cylinder and reservoir opposite to the outlet; said rod having an operating handle fixed to said projecting end and ports adjacent its inner end; a piston mounted on the piston rod to have a limited free movement on the rod during the initial outward and inward movement of the piston rod to control the opening and closing of the ports to control the fiow of liquid from the cylinder to the piston rod alternately from opposite ends of the piston; a tube slidable in the cylinder outlet and reciprocable with the piston and piston rod to connect the cylinder through the piston rod to the chamber, said tube fixed to and extending into the piston rod to a point adjacent the operating handie; a tube connected tothe restricted outlet of the reservoir extending into the chamber, the diameter of said tube being greater than the outlet, and less than the diameter of the tube extending into and reciprocable with the piston rod, substantially as and for the purpose specified.

7. In a syringe, the combination of a reservoir having an outlet; a cylinder in said reservoir having intakes adjacent opposite ends; a hollow piston rod projecting from the end of the cylinder and reservoir opposite the outlet and having an operating handle connected thereto; ports adjacent the inner end of said rod; a piston to be reciprocated by said rod having a limited movement thereon to control the opening and closing of the ports; a tube extending into the piston rod to a point adjacent the handle. and reciprocable therewith to connect the cylinder to the reservoir outlet; the reciprocation of the piston setting up a siphonic action from the reservoir through the cylinder, piston rod and the tube to the connected reservoir outlet; and means to overcome the siphon when the piston ceases to be reciprocated, substantially as and for the purpose specified.

8 In a syringe, the combination of a reservoir having an outlet; a cylinder in said reservoir having intakes adjacent 0pposite ends; a hollow piston rod projecting from the end of the cylinder and reservoir opposite the outlet and having an operating handle connected thereto; ports adjacent the inner end of said rod; a piston to be reciprocated by said rod having a limited movement thereon to control the opening and closing of the ports; a tube extending into the piston rod to a point adjacent the handle and reciprocable therewith to connect the cylinder to the reservoir outlet; an

cylinder to alternately draw liquid from the reservoir to opposite ends of the cylinder and discharge such liquid from the cylinder into the compression chamber, substantially as and for the purpose specified.

10. In a syringe, the combination of a reservoir having an outlet; a cylinder in said reservoir connected to the reservoir outlet and having suction inlets adjacent opposlte ends; piston mechanism to alternately draw liquid from the reservoir to opposite ends of the cylinder anddischarge the liquid from the cylinder; an air intake to the cylinder; and a spring influenced outwardly closing and inwardly opening check valve for said intake, substantially as and for the purpose specified.

11. In a syringe, the combination of a reservoir having an outlet; a cylinder in said reservoir having suction intakes adjacent opposite ends; a hollow piston rod projecting from the end of the cylinder and reservoir opposite to the outlet having an operating handle connected to and closing its outer end and the inner end closed with ports adjacent said end; a piston reciprocated by said rod having a limited movement on the rod to control the opening and closing of the ports; a tube extending into the piston rod and reciprocable therewith to connect the cylinder to the reservoir outlet; an air intake to the pist n rod in the operating handle; and an outwardly closing and inwardly opening spring influenced valve to normally close said intake, substantially as and for the purpose specified.

12. In a syringe, the combination of a reservoir having an outlet; a cylinder therein connected with the reservoir; a piston to reciprocate in the cylinder; a hollow piston rod extending from the end of the reservo1r opposite to the outlet; a tube extending into the piston rod and reciprocable therewith, said tube being slidable in the cylinder end and communicating with the reservoir outlet; and ports in the piston rod, .the opening and closing of which ports is controlled by the piston to discharge the liquid from the cylinder through the piston rod and tube, substantially as and for the purpose speci: fied. 13. In a syringe, the combination of a reservoir having an outlet; a cylinder therein connected to the reservoir; means to connect the cylinder to the reservoir outlet including a compression chamber; and piston mechanism in the cylinder to draw liquid from the reservoir into the cylinder and discharge such liquid from the cylinder into the compression chamber, substantially as and for the purpose specified.

14. In a syringe, the combination of a reservoir having an outlet; a cylinder therein connected to the reservolr and reservolr out let; piston mechanism to draw liquid from GEO. T. PEARSONS.