US1081832A - Speed-controlling apparatus. - Google Patents

Description

BEST A AILABLE COPY" J. T. HUME.

SPEED CONTROLLING APPARATUS.

APPLICATION FILED DEG.14, 1911. I Patented Dec. 16, 1913 a amine-snarl.

422% (um (u J. T. HUME.

SPEED CONTROLLING APPARATUS.

APPLICATION FILED D2014. 1M1.

Patented Dec. 16, 19 13 2 SHEETS-SHEET 2.

. STATES PATENT OFF I JOfiN T. Home, or'o'nrcaoo HEIGHTS, ILLINOIS, 'AssIenoR T0 CHICAGO PNEUMATIC TOOL 00., or cnIoAeo, ILLINOIS. Y

SPEED-CONTROLLING APPARATUS.

To all whom it may concern .Be it'known that I, JOHN T. HUME, a citi- Zen of the United States; residing at Chicago Heights, in the county of Cook and State of Illinois, have invented a certain new and useful Iinproi-ementin Speed-Controlling Apparatus, of which the following is afull, clear, concise, and exact,description, reference being had to the accempanying drawings, forming a part of this specification.

My invention relates, tolcontrolling devices and more particularly to speed controlling devices andhas for its object the provision of an improved device-which may be attached to any suitable prime mover to control its operation. 5

In the preferred form' of the invention -which is the form illustrated herein, theglevice is applicable particularly in connection with explosive engines and when the device is soapplied it provides suitable controlling facilities which may prevent operation of said explosive engine bey nd a certain definite speed. In the form herein shown the device is self-contained and has suitable circuit controlling devices, which circuit con trolling devices are automatically operated upon and controlled by a governor.

The form of the invention which is illustratedherein has suitable governing appliances responsive to changes in speed and these governing devices preferably "arry the spark controlling elements of the explo- When the device is desired to prevent operation beyond a certain predetermined speed limit, then the governing appliances are so arranged that should the speed exceed a given predetermined amount, the device prevents the establishment of the necessary conditions whereby an explosion is occasioned. When the speed is reduced to normal the device again permits the explosions. to take place in the normal way.

In describing the specific form of the invention herein both in what has preceded and in the specific descriptionthat will follow, it is not meant to limit the invention to this particular form as the invention is capable of wide variation and use and in a variet of different ways. I will lowever descri specifically a' form of carry in'gout .the'il'lftention in connection with the! accomspecification of Letters Patent.

panying drawings illustrating said fcu, in

I Patented Dec. 16, 1913. Application filed December 14, 1911. Serial No. 665,753.

which Figure l is a plan view oi the device with the cover removed illustrating various parts; Fig. 2 is a similar view showing the device in its normal operating condition; Fig. 3 is a similar view showing the device in an alternate condition; Fig. i is a central View of the movable elements of the device viewed from the opposite side illustrated in Figs. 1, 2 and S; Fig. 5 a sectional view on line (is-a of 2, and Fig. 6 is a diagram of '65 the circuit arrangements.

Referring more particularly to Fig.6, in.

order to describe the general operation of the device I set forth tw-o spark plugs 1, '1,

respectively associatedwith secondary windings 2, 2, which secondary windings are in inductive relation with primary windings 3, A battery at grounded at 5 furnishes the necessary current and the spark plugsare suitably grounded at 6, G, the ground representing preferably the frame of the gas engine with which the device 'is associated. The circuit through the primary windings 1S controlledby contact rollers 7, 7 which are preferably insulated from the cup shaped S0 casing 8' of the device, and contact 1s.estab-' 'lished between the frame of the machine 9 and the rollers 7, 7 through the agency of a roller 10 rotatably mounted about a shaft 11. Suitable governing devices to be explained hereinafter permit engagement between the roller 10 and the rollers 7, 7 as the shaft 11- is being rotated, but prevent contact between the elements '10 and 7 should the speed of the shaft 11 exceed a predetermined amount. Thus if the engine isrunniug' at a speed below a predetermined amount, then the roller 10 normally engages. the rollers 7, 7 to permit sparking conditions to be established at the spark plugs 1,

1,- but when the speed exceeds a predetermined amount, the roller 10 as it is'carried about the shaft 11 fails to engage the rollers 7 a nd thusthe engine misses an explosion "or more it necessary until the speed of the engine is reduced to the proper predeter mined amount. This will serve to explain the general features of the.- device and the specific construction will now be set forth" in connection with the remaining views.

The deviceitself consists of a cylindrical casing 8 which has at one side a bearing 9 for theshaft. 11 and which casing is provided with a'cap 12 screw threadedly associated with the casing 8 which also carries a hearing 13 to accommodate the shaft 11. Two contact rollers 7, 7 are rotatably mounted about the stems 14, 14 and these stems are heldin place Within the casing bymeans of nuts 15, 15. Suitable insulation 16, -16

and 17, 17 is provided so that the elements 14: and 7 are'not electrically associated with the casing 8. The rollers may rotate about their respective stems.

ed at 9 (Fig. 6), the ground again preferably being the framework of the explosive engine. The roller which periodically engages the rollers 7, 7. to make contact therewith is rotatably mounted upon a stem 18 carried by an element 19. A second element 20 similarin form to the element 19 but oppositely disposed is'provided with aslot 21 through which the stem" 18 projects so as to permitplay between the elements 19 and '20. -The elements 19 and 20 are re spectively rotatably mountedfnpon a V s aped arm 22 by meansof pins or bolts 23. The V'shaped arm 22 is'fixedly secured. to

the shaft 11 and thus as the shaft- rotatesthe elements 10, 19, 20 and 22 are carried around with the said shaft. The great bulk of the: weight of the elements 19 and 20 is abtheir. free extremities as is apparent and the faster the'shaft rotates the farther these e ements 19 and'20 at their free extremities tend to separate by reason of the centrifugal force. The greater the separation between the ele nients 19 and 20 at their free extremities, the

farther is the roller 10 carried radially toward the axis of the shaft ll'and when'the separation has reached a predetermined amount the roller 10' in its rotation fails to' engage the rollers 7, 7 under which conditionsthe engine misses ltS explosion. -A spring 24 fastened between pins25 and 26 tends to hold the elements 19 and 20 together and the strengthof this spring controLs said elements' 19 and 20 so-that the proper separation due to centrifugal force 24 may be placed under additional tension may occur: at the proper time. .'An additional pin 27 is provided so that the spring so as to change the speed limit at which the device is 'opcrative to withhold sparkingcouditions. It will thus be seen that the device acts as a combined circuit controller and governor, and as such maybe used in a variety of different. ways and under different though equivalent conditions.

Having thus described OHIOTU1 which my inycntion may take, which form isnot in- It may be said fu1- ther that the roller 10 previously-referred 'to is electrically connectedwith .the casing '8 as will appear and this casing 8 is grounddesire to secure by Letters Patent is:

periodic, engagement .with' said first afore said circuit controlling element, a shaft,- an

:ern'or ivoted on said arm and carrying said secomf'circu'it controlling element having means to move said second circuit controlling, element radially in response to the movement of said governor.

ondcircuit controlling. element adapted for arm fixedly secured to said shaft, and a governor ivoted on said arm and carrying said second circuit controlling element having means tomove said second .circuit controlling element radially in response to the movement of said governor.

comprising a shaft, a stationary framework associated therewith, a circuitcontrolling element mounted upon said frameworkan arm carriedb saidshaft, a centrifugal'governor pivota y mounted ong-saidgarm, and a secondcircuit controlling element carried by said governor movablefradiall with respect to said shaft imresponse movements of-said governor..-1

7 having aflshaft, a stationaryfiframework' a circuit. controlling elementr carried f by said cent-rife l. Qg'zivernori elements pivotally by one of said gorernor elements.

having a shaft,- a -stationary framework, acircuitcontrolli-ng elementcarried by said framework, a 'pair' of radial arms. carried by said shaft, :1 pair-of symmetrically ara second circuit controlling e ement carried by one ofsaidgovernor elements, and res1lient-'means associated with said governor elements tending to hold them in their retracted position.

my name this first day of December, A..D., 1911. J OHNT. HUME.

Witnesses:

HAZEL Jonas,

O. M. Wnnmon.

tended to limit the broad features of the invention thereto, what I claim as new and mounte respectively upon "said-arms, and a. second .circuitcontrolling element carried 1". A device .of the character described havingfa circuit controlling element, a sec- 0nd circuit controlling element. adapted, for 4 arm fixedly secured to said shaft, and a gov- *2;A..devioe of the character.- described havingacircuit controlling element, a secperiodic engagement-with said first aforesaid circuit controlling -element, a shaft, an-

3. Af-device of he character described framework, it pairofradial arms carried by said shaft,a pa ir of symmetrically arranged 5. A deviceofthe character. describedranged centrifugal governor elements pivotally mounted respectively .11 on said arms,

In witness whereof, I hereunto Subscribe, 120

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