US1264952A

US1264952A - Priming device for internal-combustion engines.

Info

Publication number: US1264952A
Application number: US13983716A
Authority: US
Inventors: Frank D Maltby
Original assignee: Individual
Current assignee: Individual
Priority date: 1916-12-30
Filing date: 1916-12-30
Publication date: 1918-05-07
Anticipated expiration: 1935-05-07

Description

F. D. MALTBY.

PHIMING DEVICE FOR INTERNAL COMBUSTION ENGINES.

APPLICATION man DEC.30.I916.

hmntd May 7,1918.

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application filed December vice for internal combustion engines which till may be quickly and easily operated,

Second, to provide an improved priming device for internal \combustion engines which may be applied to be operated from the dash or from the front of a motor vehicle.

Third, to provide an improved priming device for internal combustion engines which does not interfere with the normal operation of the carbureter.

Fourth, to provide an improved priming device for internal combustion engines which may be adjusted for the constant running of the engine in the event of the carbureter becoming inoperative or to supplement the carbureter as occasion may requlre.

Fifth, to provide an'improved priming device whichis comparatively simple in its parts and not likely to get out of repair or become inoperative.

Further objects, and objects relating to structural details, will definitely appear from the detailed description to follow.

l[ accomplish the objects of my invention by the devices and means described in the following specification. The invention is clearly defined and pointed out in the claims. A structure which is a preferred embodiment of my invention is clearly illustrated in the accompanying drawing, forming a part of this specification, in which:

Figure l is a detail side elevation of a structure embodying the features of my invention, a carbureter and manifold being shown in their operative relation therewith but on a greatly reduced scale as compared with the scale of the priming pump.

Fig. H is an enlarged .detail partially in longitudinal section on line corresponding to line 2-2 of Fig. l[.

Fig. HT is an enlarged detail section showing structural features of the inlet valve.

Specification of Letters JPatent.

Patented May *3, ram. 30,1916. Seriallto.139,887. 7

In the drawing, similar reference char acters refer to similar parts throughout the .several views,

and the sectional views are taken looking in the direction of the little arrows at the ends of the section lines.

Referring to the drawing, 1 designates the manifold of an internal combustion engine and 2 the carbureter,-3 designates the fuel connection to a carbureter and 4 the dash orfront of a motor vehicle. These parts are shown largely in conventional form, the manifold being that of a Ford motor car.

I provide a priming pump cylinder 5 and a coacting plunger 6 provided with a suitable packing 7 and a rod 8 which is slidably mounted in the cap 9 which is threaded upon the barrel 10 of the pump. The cap 9 is provided with a longitudinal recess 11 for receiving a compression spring 12 surrounding the rod 8, one end of the spring bearing against the plunger 6 and the other against the end of the cap 9. The rod 8 is provided with a suitable head or finger piece 13 by means of which it may be reciprocated. In the adaptation shown in Fig. l, the rod 8 is arranged to project through a plate 14' mounted on the dash 4 and having a slot 15 therein forthe rod 8. The cylinder is pro vided with a discharge port 17 in its side and a laterally projecting passage'arm 18 threaded into the manifold 1 at the branching point thereof, as shown in Fig. H. The delivery nozzle 19 is threaded into the end of the arm to project into the manifold at a central point and is provided with discharge and atomizing

perforations

20 and 20. The discharge port 17 is provided with a return check valve 21 held to its seat by the coiled spring 22 which is supported by the nozzle 19. a

A tube-like inlet valve seat member 23 is arranged in the end of the cylinder 10 and provided with a flange 24 engaging the end of cylinder. This valve seat member is secured in place by means of athheaded coupling 25 threaded upon the cylinder to clamp the valve seat member in place. The valve seat member 23 is provided with a central conical seat 26 for the conical valve 27 which is provided with a stem 28. The valve .27 is provided with a facing 27 of leather or other suitable fibrous material so that in event of any sediment lodging on the valve seat. it will be embedded in the facing and not prevent the closing of the valve. A compression spring 28 is arranged on the stem with one end seated against a shoulder 29 in the member 24 and the other end bearing against a; pin 30 through the end of the stem. This spring acts to maintain the valve 27 seated. The end of the stem 28 of the inlet valve projects into the coupling 25 which constitutes a housing for the spring 28.

The fuel supply pipe 32 is connected to the supply pipe 3by the union 33. The fuel pipe 32 is connected to the externally threaded end of the coupling 25 by means of a threaded union 34, a suitable gasket 35 being interposed between the flanged end of the fuel pipe 32 and the end of the coupling member 25 to insure a liquid tight connection.

! As the plunger 6 on its return stroke passes the discharge port 17 it temporarily traps a quantity of the liquid fuel above the valve 27 forcing the valve to its seat and cushioning the stroke of the plunger. The packing-7 of the plunger is disposed in a spaced relation to its inner end so that when the plunger is in its inner position the packing is at the rear of the discharge port 17 The inner end of the plunger is a, sliding fit in the cylinder, but this does not prevent the trapped liquid fuel from escaping through the port 18 quite rapidly but temporarily traps it as stated. When in its inner'position, the plunger engages the valve 27, holding it firmly to its seat and preventing any fuel being drawn through the primer to the engine, which would be highly objectionable and interfere with the normal operation of the carbureter with which the engine is equipped. The spring 12 acts to urge the plunger in its normal or inner position.

It is found under certain conditions to be desirable in starting the engine to furnish a supply of fuel in addition to that supplied by the carbureter, which can be done by retracting the plunger to permit feeding of the fuel through the priming device. To assist in locating the plunger at the desired point for this purpose, I provide a retracting lever 36 which is forked at 37 to receive the plunger rod 8, the plunger rod being provided with a cOllar 38 with which the lever engages. The lever is pivoted on ears 39 on the plate 14 and is provided with an adjustable stop 40 adapted to engage the dash, thereby stopping the plunger when the lever is actuated in the desired position.

In the operation of the device in starting the engine the plunger is retracted which draws a charge into the cylinder and the charge is forced out when the plunger is actuated and the fuel is forced through the atomizing nozzle in a fine spray or atomized condition so that when the engine is cranked a good explosive mixture is pro vided. As the nozzle is disposed centrally in the manifold, the charge is delivered so the cylinders may draw uniformly therefrom.

The plunger, when in its inner position, closes the port 17, as stated, and also when in its inner position holds the inlet valve to its seat, thereby preventing the suction of the engine from drawing fuel into the manifold through the priming device unless the piston is adjusted to permit this.

In the adaptation illustrated in Fig. I, I show the plunger rod arranged to be operated from the drivers seat which is the desired arrangement when the vehicle is equipped with a self-starter. In the modification shown in Fig. VI, the plunger rod 8 projects through vehicle so that it may be adjacent the starting crank of a vehicle which is not provided with a self starter. This is of very great advantage as it enables the cranking of the car before the atomized fuel condenses.

It should be noted that the screw threaded connection of the passage arm 18 provides a pivot means about which the priming pump may be rotated so that it may be operated either from the dash or from the front of the vehicle as may be desired.

My improved priming device is simple in structure and easily installed or applied to engines as commonly constructed and it may be readily adapted to meet the conditions of the particular engine to which it is applied.

I have illustrated and described my improvements in the form in which I have embodied and adapted the same in use. I have not attempted to illustrate or describe various modifications which might be desirable for adapting my improvements to meet different conditions as I believe the disclosure made will enable those skilled in the art to which my invention relates to embody or adapt the same as conditions may require. I desire, however, to be understood as claiming my invention specifically in the form illustrated as well as broadly within the scope of the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is: a

1. In a ,pl'iming device, the combination opening the inlet valve or the radiator 41 of the 9 naeaata of a cylinder having a delivery port in its side, a tubular inlet valve seat member having a conical valve seat in its inner end disposed in the inner end of said cylinder and shouldered to engage the end thereof, a coupling member threaded'upon said cylinder to embrace said valve seat member and clamp the same in position, a conical inlet valve provided with a fibrous facing seating in said. valve seat member and having a stem disposed longitudinally therethrough, a coiled spring arranged on said stem to urge said valve to its seat, a plunger reciprocating past said delivery port and in its inner position constituting a valve therefor so that on the in-stroke of the plunger a quantity of liquid is temporarily trapped above the inlet valve forcibly seating it, said plunger being adapted when in its inner position to engage the inlet valve and being provided with a packing disposed in a spaced relation to its inner end so that the packing is at the rear of the cylinder discharge when the plunger is in its initial position, and a spring urging said plunger to its inner position.

2. In a priming device, the combination of a cylinder having a delivery port in its side, a tubular inlet valve seat member hav; ing a conical valve seat in its inner end disposed in the inner end of said cylinder, a coupling member threaded upon said cylinder to embrace said valve seat member and clamp the same in position, a conical inlet valve provided with a fibrous facing seating in said valve seat member, a plunger reciprocating past said delivery port and in its inner position constituting a valve therefor so that on the in-stroke of the plunger a uantity of liquid'is temporarily trapped a ove the inlet valve forcibly seating it, said plunger being adapted when in its inner position to engage the inlet valve and being provided with a packing disposed in a spaced relation to its inner end so that the packing is at the rear of the cylinder dis; charge when the plunger is in its initial po-'- sition, and a spring urging said plunger to its inner position.

3. lin a priming device, the combination of a cylinder having a delivery port in its side, a tubular inlet valve seat member havi g a conical valve seat in its inner end disposed in the inner end of said cylinder, a coupling member threaded upon said cylinder to embrace said valve seat member and clamp the same in position, a conical inlet valve provided with a fibrous facing seating in said valve seat member, a plunger reciprocating past said delivery port and in its inner position constituting a valve therefor so that on the in-stroke of the plunger a quantity of liquid is temporarily trapped above the inlet valve forcibly seating it, said plunger being adapted when in its inner po sition to engage the inlet valve and being provided. with a packing disposed in a spaced relation to its inner end so that the packing is at the rear of the cylinder discharge when the plunger is in its initial position.

4. In a priming device, the combination of a cylinder having a delivery port in its side, a tubular inlet valve seat member having a valve seat in its inner end disposed in the inner end of said cylinder and shouldered to engage the end thereof, a coupling member threaded upon said cylinder to embrace said valve seat member and clamp the same in position, an inlet valve seating in said valve seat member and having a stem disposed longitudinally therethrough, a coiled spring arranged on said stem to urge said valve to its seat, a plunger reciprocating past said delivery port and in its inner position constituting avalv-e therefor so that on the in-strokeof the plunger a quantity of liquid is temporarily trapped above the inlet valve forcibly seating it, said plunger being adapted when in its inner position to engage the inlet valve, and a spring urging said plunger to its inner position.

' .5. In a priming device, the combination of a cylinder havmg a delivery port in its side, a tubular inlet valve seat member having a valve seat in its inner end disposed in the inner end of said cylinder, a coupling member threaded upon said cylinder to 'embrace said valve seat member and clamp the same in position, an inlet valve seating in said valve seat member, a plunger reciproeating past said delivery port and in its inner position constituting a valve therefor so that on the in-stroke of the plunger a quantity of liquid is temporarily trapped above the inlet valve forcibly seating it, said plunger being adapted when in its inner position to engage the inlet valve, and a spring urging said plunger to its inner osition.

6. In a primin device, t e combination of a cylinder havmg a delivery port in its side and provided with a conical valve seat vat its mner end, a conical inlet valve provided with a fibrous facing seating in said valve, a spring urging said' inlet valve to its seat, a plunger reciprocating past said delivery port and in its inner position constituting a valve therefor so that on the instroke of the plunger a quantity of liquid is temporarily trapped above the inlet valve, said plunger being adapted when in its inner position to engage the inlet valve and being provided with a packing disposed in a spaced relation to its inner end so that the, packing is at the rear of the cylinder discharge when the plunger is in its initial position.

7. In a primmg device, the combination of a cylinder having a delivery port in its side and provided with an inwardly opening inlet valve at its inner end, a plunger reciprocating past said delivery port and in its inner position constitutin a valve therefor so that on the in-stro e of the plunger a quantity of liquid is temporarily trapped above the'inlet valve, said plunger being adapted when in its inner position to engage the inlet valve and being provided with a acking disposed in a spaced relation to its inner end so that the packin is at the rear of the cylinder discharge W en the plunger is in its initial position.

8. In a priming device, the combination of a cylinder having a delivery port in its side and provided with an inwardly opening inlet valve at its inner end, a plunger reciprocating past said delivery port and in its inner position constituting a valve therefor so that on the in-stroke of the plunger a quantity of liquid is temporarily trapped above the inlet valve, said plunger being adapted when in its inner position to engage the inlet valve and being provided with a packing disposed in a spaced relation to its inner end so that the packing is at the rear of the cylinder discharge when the plunger is in its initial posltion, and a spring urging said plunger to its inner po- 9. In a priming device, the combination of a cylinder having a delivery port in its side and provided with an inwardly open- 7 packing is at the'rear of the cylinder displunger is in its initial charge when the position permitting the trapped liquid to gradually escape.

of a cylinder having a delivery port in its s1de and provided with an inwardly openng inlet valve, and a plunger reclprocat- 1ng p ast said delivery port and in its inner position constituting a valve therefor so that on the in-stroke of the plunger a quantlty of liquid is temporarily trapped above the inlet valve seating it.

11. In a priming device, the combination of a cylinder having a delivery port in its s1de and provided with an inwardly opening inlet valve at its inner end, a plunger rec procating past said delivery port and in its mner position constituting a valve therefor so that on the in-stroke of the plunger a quantity of liquid is temporarily trapped above the inlet valve seating it, said plunger being adapted when in its inner position to engage the inlet valve.

In witness whereof, I have hereunto set my hand and seal in the presence of two witnesses.

FRANK D. MALTBY.

Witnesses:

MERTON W. WENTwonTH, L. C. PARSHALL.

10. In a priming device, the combination