US2355208A - Motor-generator - Google Patents

Description

MOTOR-GENERATOR GEORGE C. DEVOL HALL LANGSTROTH Aug. s, 1944. G, C, DEVOL ET AL 2,355,208

MOTOR-GENERATOR Filed July 5, 194s e Sheets-sheet 2 Zzvenv'ns GEORGE C. DEVOL HALL- LANGSTROTH 6 Sheets-Sheet 3 'G. C. DEVOL ETAL MOTOR-GENERATOR Filed July 5,1943

Aug. s, 1944.

Z'fzven'ar-.s GEORGE C. DEVOL HALL LANGSTROTH hair Au@ 8, 1944. G. c. DEvoL ErAL 2,355,208

MOTOR-GENERATOR Filed Jul'y 5, 1945 e sheets-sheet 4 Zzven'ors GEORGE C. DEVOL. HALL LANGSTROTH Aug. 8,1944# G. c. DES/ol. Erm.

MOTOR-GENERATOR Filed July 5, 194s 6 Sheets-Sheet 6 )una ganga SM ,WWW r rET @i nCN eEA kVSL e v En M IIEM mm Patented Aug. 8, 1944 UNITED STATES kPATENT OFFICE MOTOR-GENERATOR George C. Devol and Hall Langstroth, Greenwich,

Conn., signora to Maguire Industries, Incorporated, a corporation of New York application July 5, 1943, serial No. 493,496

4 claims. (c1. zoo- 1) small power unit' which maybe easily carried into distant, difiicultly-accessible locations. Another obiect is the provision of such a unit which will generate a maximum of electrical energy for its weight and size. A further object is the construction of such a light powerful unit in compact, easily handled form. Other objects and advantages of this invention will be obvious from the present specification considered in connection with the accompanying drawings, wherein- Figure 1 is a side elevation of a motor-generator constructed in accordance with the invention, certain parts being cut away to show the interior of the unit;

Fig. 2 is a similar elevation showing the opposite side of the apparatus illustrated in Figure 1;

Fig. 3 is a top plan view of the same apparatus, with certain partscut away to show details of the interior construction and arrangement;

Fig. 4 is a side elevation similar to Figure 1, with certain additional parts cut away or Iin section to show the internal construction of certain parts which Figure l illustrates in elevation;

Fig. 5 is a view of the same apparatus as seen from the left in Figure l, certain parts being cut away or in section to show the internal construction of the apparatus;

Fig. 6 is an elevation of the supercharger unit, viewed' from the left as seen in Figure l; and

Fig. l is a horizontal sectional view of the muffier unit as seen from above.

In many situations it is desirable to carrya generator of electrical energy to points to which wires cannot or may not reach and which are inaccessible to power propelled vehicles or beasts of burden. If a man is to carry such a generator, it is highly desirable to conserve his energy and promote'his mobility by making the generator as light and as easily handled 'as possible. It is also desirable to produce the maximum of electrical energy for a given weight of portable apparatus. We have accordingly departedfrom the usual battery-operated apparatus and have v invented a new and useful combination of internal combustion motor, supercharger or blower and generator for producing electrical energy.

In the embodiment of the invention which is illustrated in the drawings, there is shown a motor or internal combustion engine I6, a supercharger II, and a generator of electrical energy I2, all carried by the same frame and all mounted upon the same shaft I3. and ,blower act as a flywheel for the motor. Obviously these three elements do not necessarily operate upon the same shaft, but their relative speeds may be varied by providing separate shafts and by using gears or belts or the like for connecting the elements. Furthermore, these may chines need not be positioned in the sequence shown in the drawings.

'I'he motor I0 is here shown as a two cycle, two cylinder internal combustion engine, having pistons I4 and I5 reciprocating in cylinders I6 and I1 respectively, and connected by piston rods I8 and I9 respectively to cranks 20 and 2l on the shaft I3. The cylinder I6 is air-cooled by a plurality of cooling elementsl or fins 22, and the cylinder II is air cooled `by a plurality of cooling elements or fins 23, in well-known manner.

`Ignition is provided for the engine III by a magneto 24, which is connected lby leads 25, 25 to a distributor 26; and a condenser 21 is ineluded in the combination in the usual manner. Leads 26, 29 connect the distributor 26 to spark plugs 30 and 3i, in the cylinders lI6 and I'I respectively.

The cylinders I6 and I1 exhaust into a manifold I2, whence an exhaust pipe 33 carries the exhaust to a silencer, here shown as a Maxim sllencer 34. A second pipe 35 carries the exhaust gases from the silencer to a muiller 36 which underlies the entire mechanism. The muiller comprises a series of open-ended tubes 31a, I'Ib which exhaust into chambers 38a, 38h. These chambers4 are designed to cushion the pulses of exhausted gas from the entering end of the preceding tube. Pressure built up in the chambers 88a and 36h is relieved by open-ended tubes leading away from the chambers. In the construction illustrated, the tube 31h leads the exhaust gases away from the chamber 36a and into the chamber 36h; and a final exhaust tube 3l leads the gases away from the chamber 38h and out of the apparatus.

Thus, the pulses of exhaust gases, which already have passed through the silencer 34, are cushioned a plurality of times in the mumer i6, and finally leave the apparatus in a comparatively steady stream without noise. This is exceedingly important in cases where it is necessary not to disclose the position or presence of the man using the apparatus.

As an additional precaution, the tubes 31a, lib

'I'hus the generator and 39 are supported in dead air spaces 45a, 40h, 40e, 40d and 40e. Additional dead air spaces 4I and 42 are provided about the supporting frames. Finally sound-deadening material 43 surrounds the supporting frames and the dead air spaces.

Fuel is supplied to the motor Ill from a saddleshaped fuel tank 44 overlying the generator I2. An internally threadedv opening in the top of the tank A44, closed by a threaded plug 45 provides means for filling and closing the fuel tank. Fuel is withdrawn from the tank 44 by means of a pipe 46 connected to the bottom of the saddleshaped tank on one side thereof, and a nipple 41 connected to the bottom of the tank at the other side thereof. The pipe 4G and the nipple 4'I are connected by a T 48 to a feed pipe 49. The feed pipe 49 is connected to the carbureter 50 of the motor I0, which it supplies with fuel.

The motor I may be started very simply somewhat as an outboard motor is started, although any other convenient means may be employed. As here shown, a ratchet wheel I is fixed to the shaft I3, and a coacting pawl 5,2 is carried by a bushing 53 rotatable concentrically with the shaft I3 about a part 54 of the bearing which carries the shaft. (See Fig. 4.) A spiral spring 55 is wound about the bushing 53 and has one end attached to the part 54 as at 55, and the other end attached to the bushing 55 as at 51. A lanyard 58 is wound about a cylindrical flange 59 formed on the bushing 53 concentricaliy therewith and outside of the spring 55. 'I'he lanyard 58 has one end fastened to the bushing 53 in a manner not shown, and extends through an opening 60 in the apparatus to a terminal ring 6I to which its other end is attached. The opening 60 is of such size that the ring 6l may not pass therethrough. The spring 55 acts to wind the lanyard 58 about the cylindrical iiange 59 and to keep the lanyard in tension between the bushing 53 and the part of the apparatus in which the opening 60 is formed:

Thus a pull upon the ring 6I turns the bushing 53 about the part 54 against action of the spring 55. At the same time the pawl 52 engages a tooth on the periphery of the ratchet wheel 5i and turns the ratchet wheel together with the shaft I3 and the parts attached thereto. The motor is thus started. Upon releasing the ring 6i, the spring 55 immediately turns the bushing 53 back to its original position thereby drawing the ring BI against the casing of the apparatus adjacent the opening B0. At the same time, in well known manner, the pawl 52 is disengaged from the ratchet wheel 5I.

The generator l2 comprises an electromagnet 52 within which rotates an armature 83, fixed to the shaft I3. In the embodiment illustrated, the armature rotates at the same speed as the motor I0, being coupled directly to the shaft of the motor. Commutator bars 54 are indicated at the end of the armature farthest from the motor, the complete apparatus being too well known to those skilled in the art to require full illustration of the energy collecting means in the drawings.

Longitudinal passages 65 are provided in the electromagnet 62 to permit passage of cooling air therethrough. Similar passages 55a may be provided in the armature. All such passages extend completely through the parts in which they are formed in the direction of the armature axis. Leads 66, vtt are indicated whereby energy produced bythe generator i2 may be carried to the point of use.

.The supercharger II comprises a centrifugal blower which draws air through a passage or intake opening 51 into its interior where a fan 65 throws the air outwardly of the blower in the manner of such fans, circulating the same clockwise when the blower is viewed as in Fig. 6. Obviously other types of supercharger may be substituted for the particular type here illustrated and described.

The air drawn through the passage 51 enters the apparatus through louvers 55 formed in the casing of the apparatus beyond the generator I2. Air filter material 55a may be provided inside the louvers 55 for excluding foreign matter g in the air. This air is drawn by the supercharger II through the generator, which it cools. Thus, connection of the passage 51 in the supercharger to the passages 55 and 55a, provides a cooling connection between the generator vand the supercharger. Most of the air passes through the passages 55 and 65a but some of it may pass through the clearance between the pole pieces 52 and the armature 63. A booster fan I0 mounted on the outer end of the shaft I3 beyond the lgenerator' I2 assists in moving the air through the louvers 63, the illter material a and the, generator.

The supercharger discharges air through two outlet openings as best seen in Fig. 6. Most of the air is discharged through a anged opening II into a large conduit or pipe I2 which is connected with a hood 'I3 surrounding the cooling flanges 22 and 23 of the motor cylinders i8 and I1. A column of air thus passes over these flanges and carries heat away from the cylinders in an air stream which passes through the casing of the apparatus and out of louvers 'Ila formed in the side of the casing. Thus the large pipe 12 constitutes a cooling connection between the supercharger and the motor.

The second opening I4 of the supercharger II has fitted therein one end of a small conduit or pipe I5 which is connected at its other end to the carbureter 50 of the motor to which it supplies air under pressure in the usual way. 'I'he pipe 15 thus provides a supercharging connection between the supercharger and the motor. The motor I0 is thus supercharged, or more properly scavenged (since a two cycle motor is shown) by the supercharger Il.

The apparatus is compact and easily handled. The entire apparatus is here shown as inclosed in a portable casing 15, with a carrying handle 'Il attached thereto. The motor is preferably a high speed motor which operates the' generator at high speed, and the supercharger facilitates operation of the whole, not only by cooling the generator and the motor, but by supercharging or scavenging the motor, whereby the latter may be operated at very high speeds.

Because such apparatus is designed for military or emergency use, economy and durability are not required o1' it. The apparatus is expected to wear out after a short time and be replaced. by another such unit. Accordingly, speeds and loads which would normally be pro hibitive are permissible with this apparatus.

Finally, as indicated above, the apparatus is noiseless and can be operated secretly. Being a portable, independent power unit, it is adapted for use in isolated localities. Accordingly. the motor-generator can -be carried by individual men,.or in non-powered units as gliders, sail boats, tow boats, bicycles, dog sleds and the like. The form of the invention here described and illustrated in the accompanying drawings is presented merely by way of illustration. Other forms and applications of the invention will readily suggest themselves to those dealing with such problems, which do not depart from the lnvention or `the proper scope of the appended claims.

We claim:

l. Portable apparatus for generating electric impulses comprising a casing having air intake and muffler connected in series in said casing into which said motor exhausts.

2. Portable apparatus for generating electric impulses comprising a casing having air intake and air outlet openings therein; a generator of electric impulses. 'having air passages through its pole-pieces, mounted in said casing; and an air-cooled motor mounted in said casing for operating said generator; in combinationwith a supercharger for drawing air through the polepieces of said generator and supplying cooling air and supercharging air to said motor, operatively associated with said -motor and said gen-k erator in said casing; and a silencer and muiiler in series in said casing into-which said motor exhausts.

3. Portable apparatus for generating electric impulses comprising a casing having air intake and air outlet openings therein; a generator of electric impulses. having air passages through its pele-pieces and through its armature, mounted in said casing; and an air-cooled motor in said casing for operating said generator; in combination with a supercharger for drawing air through the passages in saidgenerator and supplying cooling air and supercharging air to said motor, operatively associated with said motor and said generator in said casing; and a silencer and muier in series in said casing into which said motor exhausts.

4. A self-contained, portable, silent apparatus for generating electric impulses, said apparatus comprising a casing, an air-cooled motor in said casing, a shaft for said motor, a generator mounted on said shaft in said casing and acting as a flywheel for said motor, said generator having air passages through its poles and its armature extending in the direction of the armature axis, louvers in said casing adjacent said generator for admitting air to said casing, an air filter associated with louvers for excluding foreign matter in the air, and exit louvers in said casing adjacent said motor for permitting egress of air from said casing, in combination with a supercharger mounted on said shaft between said generator and said motor having its intake con- -nected to the passages in said generator, said supercharger having a large outlet and a small outlet, a conduit connecting the large outlet of said supercharger to a point adjacent the coolingv elements of said motor, a second conduit connecting the small outlet oi said supercharger to the carbureter of said motor, a silencer in said casing into which said motor exhausts, a multichamber muiiier in said casing into which said silencer exhausts. and a covering of sound-deadening material surrounding said muiiier, substantially as described.

GEORGE C, DEVOL.

HALL LANGSTROTH.

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