US526348A - Explosive-engine - Google Patents

Description

'(No Model.)

H. F. FRASER. EXPLOSIVE ENGINE.

No. 526,348. Patented Sept. 18, 18 94.

2 SheetsSheet 2.

NITED v STATES PATENT OF IC HENRY F. FRASER, OF ANTIOCH, CALIFORNIA.

EXPLOSIV'E-ENGINE.

$PECIFICATION forming part of Letters Patent No. 526,348, dated September 18, 1894.

' Application filed September 19,- 1893. Serial No. 485,875. (No model.)

T0 at whom may concern:

Be it known that I, HENRY F. FRASER, a citizen of the United States, residing at Antioch, Contra Costa county, State of California, have invented an Improvement in Ex:- plosive-Engines; and I hereby declare the following to be a full, clear, and exact description of the same.

My invention relates to the class of explosive engines, and especially to those engines which receive an explosive charge at each end alternately.

It consists in the novel construction and arrangement of the main and compression cylinders, the pistons operating therein and the several passages and controlling valves, together with the igniting or sparking mechanism, all of which I shall hereinafter fully describe and claim.

The object of my invention is to provide a simple and effective double acting explosive engine.

Referring to the accompanying drawings for a more complete explanation of my invention-Figure 1 is a vertical longitudinal section of my engine. Fig. 2 is a section on line 00-90 of Fig. 1. Fig. 3 is a top view of the main cylinder and exhaust valves.

A is the main cylinder provided with a water-jacket a and with suitable heads a.

B is the piston working Within the cylinder and having a. rod b which passes outwardly through a suitable stuffing-box b in the lower head a of the cylinder. Both piston and rod are made hollow as shown in Fig. 1, to contain water by which they are kept cool, a requirement very essential in a double acting engine where these parts are liable to quickly become heated.

O is the compression. or charge cylinder. This may be connected and arranged with respect to the cylinder A by any suitable means, here shown as being located to one side thereof with the inlet passages intervenlng.

Within the compression cylinder is mounted the piston D, the rod (1 of which passes down through its lower head in a suitable stuflingbox (1.

The cylinder 0 is connected at its uppere, and said cylinder is connected at its lower end with the lower end of the cylinder A by passages E E having a suitable controlling valve e.

F is theinlet for the explosive charge, oom- "municating with the upper end of the compression cylinder 0, and provided with a suitable valve, not shown.

F is the inlet for the, explosive charge communicating with the lower end of the cylinder O, and provided with a suitable'valve, not shown.

G is the exhaust from the upper end of cylinder A, having a valve g, and G is the exhaust from the lower end of the cylinder, having the valve g.

H is the engine shaft with the crank it of which the piston rod 1) is connected. Upon this shaft is an eccentric h which operates the rod 01 of the compression piston D. This shaft also carries cams 71 and h which oscillate levers I and 1 respectively, and upon which the stems g and g of the exhaust valves g and g respectively rest.

Within the passages E and E are formed the explosion chambers J and J and in these are located the igniting devices or electrodes. One of these electrodes in each chamber is designated by K. Its inner end is beveled as shown, and it is controlled by a spring 7a which holds it in. The other electrode is K, the inner end of which is also beveled, and it also is controlled by a spring is which holds it in. The beveled points of the two electrodes are normally held separated, and they are suitably mounted with respect to proper insulation common in such cases.

The outer end of each electrode K has a stop or contact button 10 against which the ends Z of a centrally pivoted rocking lever L, interposed between the pairs of electrodes, alternately come in contact. This rocking lever is actuated bya rod M which is itself operated by an eccentric Won the main shaft H.

The operation of the engine is as follows: As the piston D in the compression cylinder 0 moves downwardly, it compresses and forces the explosive charge from below it through the passages E E into the explosion chamber J, wherein it is ignited, and the expanding gasesentering the lower end of cylinder A, the. piston B is driven on its upward stroke, the previous products .of the explosion Ibein g driven out through the exhaust passage G and valve 9 which is then open. The downward movement of the compression piston D draws in another explosive charge into the compression cylinder 0 above it, and upon the up stroke of the piston D, this charge is forced through the passage E E, into the upper explosion chamber J, and is there exploded above the now descending piston B which is thereby driven on its downward stroke, the previous productsof explosion being exhausted through the lower passage G, the valve g of which is at this time opened. Thus a double acting ex-' plosive engine is obtained, of simple construction and effective in operation.

The spark is effected by the electrodes as follows: The rocking lever L bearing against the stop button 10 of the electrode K, draws said electrode outwardly, and upon being rielieved said electrode springs in and is thrown far enough to come in contact with the electrode K, the contact being a yieldingone due to the spring control of both. This contact is but momentary and upon the rebound or return of the electrodes to normally separated position, the spark is eifected. The beveled ends of the two electrodes insure perfect contact and separation with theminimum of friction and jar, and in addition thereto, tend by ascraping contact to keep their surfaces clean.

Having thus described my inventiomwhat I claim as new, and desire to secure by Letters 5 Patent, is-v 1. In a double-acting'explosiveiengine, the 1 combination of a main cylinder with its pis-- for alternately withdrawing one of the elec- I trodes, of each pair whereby upon said electrode being relieved it will spring into contact with the opposing electrode and will be caused to instantly rebound and become normally separated therefrom.

2. In an explosive engine, the normally separated electrodes each controlled by a spring, in combination with a pivoted lever having its free end adapted to contact with and withdraw one of the electrodes whereby upon said electrode being relieved it will spring into contact with the opposing electrode and will becaused toinstantly rebound and become normally separated therefrom.

3. In an explosive engine having explosive chambers and passages connectingthem with each end of the main and compression cylinders, the electrodes arranged in lineand each connected with a spring whereby their inner ends are normally separated, a centrally-pivoted lever interposed between each pair ofzthe electrodes having its free endsadaptedlto engage the electrodes to withdraw them, and'a rodfrom the engine shaft too perate thelever.

4. In "an explosive engine having explosive chambers, electrodes arranged in pairs with the electrodesof each pair in line, acentrallypivoted rocking-lever interposed between the pairsof electrodes and having its free'ends adapted to engage a'contactor button on one member of each pair of electrodes for withdrawingsai'd members, and springssconnected with the electrodes of each-pair'whereby the electrodes normally separate after contact, and means for operating the lever.

In witness whereof I have hereunto set my hand.

HENRY F. FRASER. Witnesses:

S. H. NOURSE, H. F. Asonnox.

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