US 979788 A
Description (OCR text may contain errors)
E. P. NOYBS. VACUUM AlPARATUS. APPLICATION FILED Nov. 29, 1907.
Patented Dec. 27, 1910.
supplying the motor with its owi combus- -To all whom 'it my was, Toc. P.- POWER cemPANY, or
Be it known that I, Enwinii)V P. NoYEs, a citizen ,of the United States, residing at Winchester, in the county of Middlesex Vand State of Massachusetts, have invented -certa-in newand useful Improvements in Vacuum Apparatus, of which the following is a specification.
This invention relates to means for controlling and for utilizing thel mechanical pumping suction of an Vinternal-combustion motor, such as an explosion motor. In connection with such a motor suitable means are preferably provided whereby the diier ence iniuid pressure created by the suction of the pistoni-or equivalent element in tion fluid is applied -to the performance of machanical work other than that of mere charge-formation. Thus 'I' ani enabled to enhance the usefulness of these motors by Vapplying them directly to the production of vacuums for industrial purposes without the intervention of a separate vacuum pump driven by the motor.
My present invention is especially concerned with the throttle-control of one or more supply passages tov a motor of this type, and in carrying out the invention with the common type of explosion motor, fer to* extend its suction conduit or, pipe, generally the air pipe, to the desired'point of use anterior to the inotor with respect to the direction of fluid fiow in said pipe and there equip said pipe with the necessary dev vices for mechanically applying the vacuum.
These devices may be of any known or suitable type for utilizing the elastic fluid 'flow flue to the vacuum, or for utilizing ,the difference in pressure between atmosphere and the suction pressure'createdby the motor. Specifically, the vacuum-using apparatus may, as hereinafter shown, consist of means for gathering dust from external objects such as the interiors of buildings, with a suitable strainer for-separating the dust -from the 4motor air-current on which -it is borne.
IVhen the combustible-charge-forming des .vice of the motor consists of a liquid-fuel mixer or'carbureter operated by the passage of the air-current, I have found it desirable to effect certain changes in the construction I pretogether EDWARD P; Norris; 0E WmcHEsrEm -AssAcPiUsErrs, A ss'IGNoE, Er ritratti:4 Assiett- NEWARK, NEW JERSEY, A coEPoEATIoE-or vacuum APPARATUS.
specificati@ of retten Patent; Pafep'tedpec, 27,1910, '.Appiioaan aieameter 29,1907, serial No. 404,214.
Of the'accoinpanying drawings, Figure 1 represents an elevation, partly in section, showing my invention in the form of an `automobile whose propelling I'notor is dust from external objects. F ig. 2'represents a sectional viewl of the carbureter. Fig. 3 represents a sectional view' .of the automatic air-inlet valve.' Fig. 4 represents a ertical section of one of the motor cyliners. v
10 is the frame of the vehicle and 11 is the propelling mot-or, here shown as a twocylinder motor with an air-suction pipe 12 leading vthrough a carbureter 13 and continuing as a combustible-mixture pipe 14 branchin to the respective cylinders. The four-stro e cycle and the, two-stroke cycle are common types of explosion inotors to both of which -my invention applies, the dif- `ference as regards the application of the ina. dis lacer-chamber, usually the crankcham er, in the case of a two-stroke motor. I have shown anV ordinary four-stroke cycle motor.
The suction-pipe 12 is shown as extended vanteriorly for the purpose of applying the motor suction to extraneous objectsand'controlling the' motor from a distance, and when' the extraneous objects are dust-particles or surfaces requiring to be cleaned of dust, the inlet-end of the suction-pipe is furnished with a dust-gathering tool 15 of any suitable pattern, and with a iiexiblesection or hose 17 carrying said tool, sothat the tool may lbe moved about. The flexible hose enables the tool 15 to reach places from which dust is to be gathered`I ,and it also enables the motor to be` controlled from a shifting locality. A valve 1G in said air-pipe near the suction instrument enables the air inlet to be shut oit' or regulated, and the motor itself may be throttled'and regulated with equipped to furnish a vacuum for collecting Y vention, lying in the fact that the suctionpipe leadsinto the combustion-cylinder in the case of a four-stroke motor, and into ever is not claimed in the present applideterminate location w1th 'respect to the motor the flexible section of the suction-pipe" may generally be dispensed with. The exv .tent of lthis pipe will dependV upon the prox;
of the suction-using device, and the partlcular character of said device may be varied according to the kind of work `to be performed. e
yA dust-strainer or separator of any suitable type is provided in the suction-pipe be- .tween the hose 17 and the carbureter 13. I
have shown a strainer 21 composed of an outerfcasing and an inner porous removable bag 22 for retaining the dust and permitting a purified combustion-air current to goto the motor.
Modification of the usual carbureter arrangement in which the float chamber is open to atmospheric pressure is here eected by substantially sealing the float-chamber or reservoir 23 of the carbureter against the entrance of atmospheric air and leading an air-pressure duct 24 to said chamber from a point in the suction pipe anterior to the fuel-mixing point. ence when the air-supply becomes more or less rare because of a var ing vacuum, the motive pressure on'the sur ace of the fuel in chamber 23 lvaries conformably, and a tendency is established to automatically maintain fixed ratios of air and fuelin the combustible mixture.
Ata suitable -point anterior to the carbureter, the suction-pipe 12 is rovided with abranch airinlet 26, contro lable at will, for use in starting the motor, in running the vehicle under 1ts own power, etc.,`and` there may be a two-wayv valve 25, with a suitable operating device, for putting either the inlet 26 or the pipe 12 into communication with the carbureter, that is, for direct# ing the motor suction at will either to the 1n ets 15 and 28 on the one hand, or to the inlet 26 on the other hand. It will be seen that this valve is a switching valve, controllin two ports reciprocally by one motion. do not however wholly conline vmyself to the use of a single valve forthis directive function.
lThe valve 25 is able i to Alperform throttle regulation for' inlet 26.
second branch inlet 28 to the suctionpipe 12 is equip ed with an automatic airpressure-operate mechanism 27 including a valve 29, a-piston 30, and a valve-closing rmanently-fixed or cipal spring A`'()nits lower side the piston has 1 atmosphexc'pressure, andon its upper side the suctlon pipe pressure plus that o 31', 1s'o that the valve tendsto open w` 'en-'a :predetermined degree of vacuumis attained 1n plpe 12.1 Hence if the flow through the dusttool 15 should'be interni ted by the closingof valve 16 or kinkin o thehose, the
motor would not be deprive of combustion air. The device 27 may alsobe adjusted to correct the surging in motor speed which might otherwise be observed-because of the elasticity of a large body of air in the suction-v ipe. Such surgiing is observed vrinf at .low spee under nearly-c osed thrott e. In order to make a relatively-high vacuum available at the nozzle 15, the spring of the .relief-'valve device 27 is of course usually set so as not to allow the valve 29 to open until. vthe motor is well throttled ydown, in which case stallin of the motor is prevented. Up to Athat olnt the throttle va ves 16 and 25 are ab e to control the motor rformance. This device, while greferab y used where a strong vacuum is esired, is not indispensable. My invention is ada ted to stationary as wellas ortable or ve ide-propelling motors, an 4may Aof course be varied 1n its constructional embodiment.
I claim,- v -1. Vacuum a paratus comprising an automatic interna -com'bustion motor having means for mechanically pumping its combustion-air charge, an anteriorly-extended air-supply vpipe for said motor having f a a throttle valve in the movable portion of said pipe 2. acuum apparatus comprising an automovable portion carrying the 'air inlet, and e matic internal-combustion motor adapted' to mechanically pump its combustion-air charge, an anterlorly-extendedair-suction pipe having a plurality of suction inlets one of which is provided with means for applying the motor suction to the performance of external Work, and throttle-valves for the respective inlets controllable at will.
In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses, the 26th day of November 1907.
' EDWARD P. NvoYEs. 4
R. M. PmRsoN, G. W. HOPKINS.