US2272822A - Governor - Google Patents

Description

Feb. 10, 1942. A. B. RA'USCH GOVERNOR Filed July 11, 1940 Patented Feb. 10, 1942 UNlTED sr 3 Claims.

This invention relates to an improved governor which is more particularly intended for use with internal combustion engines.

One object of the invention is to provide a governor which will be operative after the vehicle has reached a predetermined speed, for shutting off the flow of fuel to the carburetor of the vehicle.

Another object of the invention is to provide a governor which will be driven from the drive shaft end of the transmission so that said governor will not be placed in operation when the vehicle is operating in either low or second gear.

A further object of the invention is to provide a device of this character which may be readily attached to a motor vehicle and which will be highly effective in use for preventing the operation of said vehicle at an excessive speed.

A still further object of the invention is to provide a governor wherein the switch employed may be shifted so that the speed at which the governor becomes effective may be predetermined.

Other and incidental objects of the invention, not particularly mentioned hereinbefore, will become apparent during the course of the following description.

In the drawing:

Figure 1 is a side elevation of a motor vehicle, the view being broken away to show the positions of the parts of my governor,

Figure 2 is an enlarged longitudinal sectional view of the governor unit employed,

Figure 3 is an enlarged longitudinal sectional view of the carburetor control unit, and

Figure 4 is an enlarged detail plan view showing the mounting of the throttle breaker arm.

Referring now more particularly to the accompanying drawing, wherein like numerals of reference will be seen to designate like parts throughout the various views, the numeral I indicates a motor vehicle of conventional design. The motor is shown generally at 2 and the carburetor at 3. The carburetor throttle arm is shown at t.

The vehicle I includes a conventional dashboard 5 on which is mounted a speedometer 6. The speedometer is connected to the drive shaft of the vehicle I by means of a cable 1. While the drive shaft itself is not shown, it should be understood that said shaft, together with the connection between the shaft and the cable I, is entirely conventional. The cable I is divided into two sections, i. e., section I and section l My improved governor includes a governor unit which is shown generally at 8. The governor unit includes a casing 9 which may be of rectangular or any other suitable shape. The casing includes end walls II) and II and side walls I2 and I3, the side wall I2 being formed with a longitudinally extending slot I4.

Extending through the casing throughout its length and projecting from each end thereof is a governor shaft I5. The governor shaft has end portions I6 and I1 which are connected, respectively, to the sections I and l of the speedometer cable I. Alined bearings I8 and I9 are mounted on the end walls It and I I and are projected to define coupling sleeves 20 and 2|. Couplings 22 are screwed on each of the caps and serve effectively to connect the sections I and l to the ends of the governor shaft I5.

Mounted on the governor shaft to turn therewith near the end wall I I is a collar 23. The collar is held against turning'movement on the shaft by means of a pin 24'. A collar 25 is freely mounted on the shaft I5 and is normally located near the end wall IIl. Surrounding the shaft I5 is a coiled spring 26, said coiled spring normally retaining the collars in extended spaced relation to each other. Each of the collars 23 and 25 is provided with yokes 21, and extending between corresponding alined yokes on the collars are governor weight elements 28. While two of the elements are shown in Figure 2 of the drawing, it should be understood that three of said governor weight elements will normally be em ployed. Obviously, however, any suitable number may be used. Each of the governor weight elements includes a weight 29 and connecting straps 30 and SI. The connecting straps 30 have corresponding outer ends swingingly connected to the yokes and corresponding inner ends swingingly connected to pins 32 on the weights 29. The connecting straps 3!, similarly, have corresponding outer ends swingingly connected to the yokes 21 on the collar 23 and corresponding inner ends swingingly connected to pins 33 on the weights 29.

Fixed to the outer face of the collar 25 is a governor disk 34. It will now be understood, it is believed, that, when the shaft I5 is rotated at a high rate of speed, the collar 23 will be rotated, and such rotative movement will be transmitted to the collar 25 and the disk 34 through the governor weight elements 28. As the speed of the governor sha'ft I5 increases, centrifugal force will cause the weights 29 to move radially with the result that the straps 30 and 3I will cause the collar 25 to shift longitudinally of the shaft l and against the tension of the spring 26.

Mounted on the wall [2 and within the slot [4 is a switch 35, said switch including a pair of contact members 36 and 31, the contact members each having a contact 38. The switch 35 includes a pair of spaced plates 39 and 46 which are held in straddling relationship to the margins of the opening 14 by screws 4|. It will be understood that the screws 4| may be loosened for shifting the switch longitudinally within the slot, for reasons to be described in more detail hereinafter. The contact member 36 is, as will be seen, formed with an arm or reed 46 which arm is provided with a bent portion 40., said portion 40 being directed toward the wall [2. The arm and bent portion are provided for permitting return of the disk 34 to inoperative position in the event that said disk should move past the switch, as might happen if the vehicl should gain a higher speed than that for which the governor was set, when coasting down hill. Attention is called to the fact that the disk is provided with a rounded edge to insure smooth engagement with the arm 46 There will now be described the carburetor control unit which is shown in longitudinal section in Figure 3 of the drawing. The carburetor control unit includes a housing 44 which is of rectangular or any other suitable shape. The housing 44 includes a rear wall 45 and top and bottom walls 46 and 41. A front wall 48 is, of course, also provided. The bottom wall 4'! has mounted on the outer surface thereof a hemispherical connecting bracket 49, said bracket receiving a ball 50 therein and said ball 56 being connected to a mounting strap 5!, said mounting strap being located conveniently with respect to the carburetor 3 of the motor vehicle. The purpose of the cooperating bracket 49 and ball 56 is to insure a slight amount of flexibility of mounting for the carburetor control unit so that the throttle, to be mentioned hereinafter, will be permitted to work without binding.

Mounted on the rear wall 45 of the housing 44 is a solenoid magnet 52, said magnet including a coil 53, a tube 54, and a plunger 55, said plunger being slidable within the tube. As shown in dotted lines in Figure 3, the plunger 55 is formed at its inner end with a socket 56 and said socket receives one end of a compression coiled spring 51, the opposite end of said coiled spring being anchored to a lug 58 on the wall 45 axially within the tube 54. As seen in Figure 3, the spring 51 normally urges the plunger to its outermost position.

The plunger 55 is formed with an axially located forwardly extending integral stem 59, said stem having a reduced portion 60 terminating in a ball 6!, said ball being located in a longitudinally extending slot 62 which is formed in a throttle breaker arm 63. A cover plate 64 overlies the throttle breaker arm and serves the purpose of retaining the ball in position within the slot. It will be understood, however, that the ball may move longitudinally within the slot as the throttle breaker arm is shifted, in a manner to be described hereinafter.

As shown in Figure 4 of the drawing, the throttle breaker arm 62 is mounted for vertical sliding movement between a pair of guides 65, said guides being mounted on the wall 48 and extending vertically throughout the height of said wall. The guide 65 also guides the throttle rod elements 66 and 61. The throttle rod element 66 has its upper end connected with the carburetor throttle arm 4 and its lower end normally in engagement with the upper end of the throttle breaker arm 63. The upper end of the throttle rod element 61 is normally in engagement with the lower end of the throttle breaker arm and the lower end of said element 61 is connected with the accelerator by means of necessary linkage. Pins 68 extend laterally from the throttle breaker arm and into tracks 69 which are formed on the opposing edges of the guides 65. The pins cooperate with the tracks for permitting outward swinging movement of the throttle breaker arm at any point along the height of the guides.

The operation of the invention will now be set forth. When a vehicle motor is started and the proper gears meshed to cause the vehicle to move, the shaft within the cable I will be caused to roate. This rotative movement will, of course, be transmitted to the governor shaft l5. While the vehicle is moving slowly, the governor shaft will be, of course, rotated slowly. The result of slow rotation w ll be that t"e weights of the governor weight elements 28 will retain the normal positions. The spring 26 will effectively retain the collars 23 and 25 in the full separated positions. Before progressing further with the description of operation, let it be assumed that the governor is set to operative when the vehicle reaches a speed of thirty-five miles per hour. When the vehicle approaches this speed, the governor weights 29 of the elements 28 will be shifted outwardly by centrifugal force, and this outward shifting movement will cause the collar 25 to move toward the collar 23, on the shaft l5. This movement will, of course, be against the tension of the spring 26. The disk 34 will, of course, be moved with the collar, and when the vehicle reaches the speed of thirty-five miles an hour, the disk will engage the contact member 36 and spring said contact member toward the contact member 31, with the result that the contact 38 will be closed. Closing of the contacts will close the electric circuit through the Wires 43 and the vehicle battery to the magnet coil 53. Upon energization of the magnet coil, the plunger 55 will be shifted against the tension of the spring 51 with the result that the stem 59 will beshifted toward the solenoid magnet coil. Shifting of the stem 59 will cause the ball 6! to engage the cover plate 64, at a point along the length of the slot 62, with the result that th arm 63 will be swung away from the wall 48 and about the pins 66. The connection between the throttle rod elements 66 and 61 will then be broken, with the result that the throttle rod element 66 will be permitted to drop, within the guides 65, for moving the carburetor throttl arm to idling position. The vehicle will, obviously, be caused to reduce speed.

Attention is particularly called to the fact that, before the vehicle may be again accelerated, it will be necessary to allow the throttle rod elements to assume full inoperative position. That is to say, the throttle rod element 61 must be in its lowermost position. When this position is reached, it will be possible for the throttle breaker arm 63 to return to operative position between the elements 66 and 61. In order to facilitate this return movement, the arm 63 is formed with a curved upper inner end portion 10. After the throttle breaker arm has been allowed to return to operative position, the vehicle may be speeded up to the predetermined set speed.

The speed at which the governor will be brought into operation may be predetermined readily, this being done merely by shifting the position of the switch 35 within the slot I4. That is to say, when the switch is moved so that the contact members are relatively near the disk 34, in inoperative position, the device will be brought into operation at a relatively slow speed. It is obvious that, if the switch is moved in the opposite direction in the slot, for disposing the contacts farther away from the disk 34, the device will not be brought into operation until the vehicle has reached a relatively high speed.

It is desired to mention the fact that I have shown no wiring diagram. The reason for this is that such a, diagram is believed unnecessary in view of the fact that the contact members 36 and 31, the terminals of the coil 53, and the terminals of a batter are all connected in series.

It is believed that, in view of the foregoing description, the construction and operation of my improved governor will now be thoroughly understood.

Having thus described the invention, what is claimed as new is:

1. In a, governor, a carburetor control unit including a housing having a front wall, guides on the front wall, throttle rod elements having opposed end portions slidable in the guides, a throttle breaker arm slidable between the guides and between the throttle rod elements, and means within the housing and operable for displacing the breaker arm whereby the connection between the throttle rod elements will be broken and one of said elements will be permitted to shift for closing a throttle.

2. In a governor, a carburetor control unit including a housing having a front wall, guides on the front Wall, throttle rod elements having opposed end portions slidable in the guides, a throttle breaker arm slidable between the guides and between the throttle rod elements, and means within the housing and operable for displacing the breaker arm whereby the connection between the throttle rod elements will be broken and one of said elements will be permitted to shift for closing a throttle, said means including a solenoid magnet having a coil, a plunger, a stem extending between the plunger and the throttle breaker arm, and a spring normally urging the plunger to outermost position with the throttle breaker arm in position between the throttle rod elements, said solenoid magnet being energizable for shifting the plunger and stem and displacing the throttle breaker arm.

3. In a governor, a carburetor control unit havinga housing formed with a front wall, guides on the front wall, throttle control elements having opposed end portions slidable in the guides, a throttle breaker arm slidable in the guides and hingedly mounted at one end for outward swinging movement, said arm having a slot and being normally disposed between the ends of the throttle rod elements, a solenoid magnet within the housing and having a magnet coil, a plunger slidable in the coil and having a stem terminating in a ball, said ball being located in the slot, and means overlying the slot and retaining the ball in place therein, said ball being slidable longitudinally within the slot, said throttle breaker arm and throttle rod elements being shiftable for controlling fuel flow to a carburetor, said solenoid magnet being energizable for shifting the plunger and stem for swinging the throttle breaker arm from beneath one of the throttle rod elements whereby one of said throttle rod elements will shift to throttle closing position,

ANTHONY B. RAUSCH.

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