US1146064A - Electric-circuit-controlling switch. - Google Patents

Description

W. E. GORTON.

ELECTRIC CIRCUIT CONTROLLING SWITCH.

APPLICATION FILED JUNE I0. IBM.

1,, 14,064., Patented July 13, 1915.

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W. E. GORTON.

ELECTRIC CIRCUIT CONTROLLING SWITCH.

APPLICATION FILED .IUNE I0, 191.4.

Patented July 13, I915.

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WILLIAIVIE. GORTON, OF ST. JOSEPH, MISSOURI, ASSIGNOR 0F ONE-HALF T0 WILLIAM F. HOFFMAN, OF ST. JOSEPH, -IVI'ISSOURI.

ELECTRIC-CIRCUIT-CONTROLLING SWITCH.

Specificationof Letters Patent.

Patented July 13, 1915.

Application filed June 10, 1914. Serial 1110.344361].

To all whom it may concern Be it known that I, WILLIAM GoR'ro-N, a citizen of the United States, residing at St. Joseph, in the county of Buchanan and State of Missouri, have invented new and useful Improvements in Electric-Circuit- Controlling Switches, of .Which the follow.- ing is a specification.

This invention relates to improvements in electric circuit controlling switches and has particular application to a pressure controlled switch for controlling the circuits of electric motors for driving air pumps, water pumps and analogous apparatus, the present invention being in thenature of an improvement on the switch illustrated in my former Patent No. 1,050,939, issued January 21, 1913.

In carrying out the present invention, it is my purpose to provide a switch of the class described whereby the circuit of the motor will be broken when the pressure of the fluid reaches a predetermined point .and whereby such circuit will be reestablished upon the pressure dropping below a prescribed point.

It is also my purpose to provide an electric circuit controlling switch wherein the blade of the switch will be actuated to open and closed positions with a snap action, thereby preventing arcing at the contacts and eliminating the burning out of such contacts.

A further object of my invention is to improve and simplify the general construction of switches of the character referred to and to provide a switch which will be positive and effective in operation.

With the above and other objects in View, the invention consists in the construction, combination and arrangement of parts hereinafter set forth in and falling within the scope of the claims.

In the accompanying drawings, Figure 1 is a top plan view of an electric circuit controlling switch constructed in accordance with the present invention, the parts being shown in the position they occupy when the switchis closed. Fig. 2 is a similar view showing the parts in the position they occupy previous to the opening of the switch. Fig. 3 is a vertical sectional View through the switch. Rig. 4t-is a similar viewtaken at right angles to Fig. 3. Fig. 5 is a plan view of the locking plate and arm connected thereto removedj Referring now-to the drawings in detail, 1 designates a base or slab composed of slate, porcelain, fiber or other insulating material. Upstanding from the base 1 adjacent to one end thereof is a post 2 .and rotatably mount edupon the post 2 is a disk 3 preferably composed of insulating material, such as porcelain. Secured to the inner face of the disk 3, that is, the face of the disk confrontingthe adjacent face of the base or slab 1, is a switch blade 4 having the opposite ends extending outwardly from the disk at diametrically opposite points. Coacting with the opposite ends of the blade 1 and adapted to receive the latter when the disk is rotated in one direction are contact jaws 5 suitably fastened to the base 1 and openingin relatively opposite directions so that when the disk is revolved in one direction the jaws will receive the opposite ends of the blade, while when the direction of the disk is reversed the ends of the blade will recede from and disengage the jaws. Fixed to the upper face of the disk- 3 and rotatable therewith is a locking plate 6 having oneedge, adjacent tothe opposite ends thereof, formed to provide shoulders 7 and shoulders 8 offset from the shoulders 7. Fixed to the opposite edge of the locking plate 6 and projecting outwardly therefrom is an arm 9 by means of which the disk 3 and blade 4 may be revolved to open and close the switch. Upstanding from the base adjacent to one side edge thereof and at opposite sides of the axisiof the disk are pivot posts 10 and pivoted upon the upper end of one of the posts is a dog 11 adapted to engage the ad jacent shoulder 7 on the locking plate 6 to hold the disk and switch blade against movement in one direction, while pivoted upon the upper end of the remaining pivot post is a dog 12 adapted to engage the adjacent shoulder 7 to prevent movement of the switch blade and disk in the opposite direction.

Pivotedupon the post with the dog 11 and lying in face to face contact with the upper side of the doglis a lever 13 capable of swinging movement and adapted when swung in one direction to engage an adjust- 12 and lies in face to face contact with the upper side of the latter and is capable of swinging movement and adapted, when swung in one direction, to engage an adjustable set screw 17 threaded through a lug 18 formed integral with the outer edge of the dog12 and projecting upwardly therefrom. These levers 13 and 16 are disposed at the opposite sides of and in a plane above the arm 9 and the outer ends of the levers are equipped with depending pins 19 disposed in the path of movement of the arm 9 so that when the latter is swung in one direction the lever 13 will be swung about its pivotal connection with the post 10 and engage the set screw 14 to swing the dog 11 out of the path of the adjacent end of the plate 6, while when the arm is swung in the opposite direction, the lever will be actuated to engage the set screw 17 and so swing the dog 12 out of the path of the adjacent shoulder 7. Secured to the confronting edges of the dogs 11 and 12 and acting to draw such dogs toward each other and hold the same in the path of the respective shoulders on the locking plate is a coiled contractile spring 20, while intersecting the levers 13 and 16 adjaeent to the outer ends thereof is a coiled contractile spring 21 acting to draw one lever after the other so that the pin on the pulled lever will engage the adjacent edge of the arm 9 with the effect to swing the latter and the switch blades upon the release of the particular locking dog.

Pivoted upon the upper end of the post 2 and disposed in a plane above the arm 9 is an operating lever 22 adapted, when swung in one direction, to engage the adjacent edge of the lever 13, and when swung in the opposite direction to engage the adjacent edge of the lever 16. This operating lever 22 is operated through any suitable form of pressure controlled device. In the present instance, this device comprises a tubular case 23 appropriately fastened to the base 1 and having one end formed with an annular flange 24 adapted to be bolted or otherwise connected to a pressure reservoir or receiver and the opposite end screw threaded interiorly as at 25. Disposed within the flange end of the case is a diaphragm 26 under the influence of the fluid within the receiver, while threaded into the opposite end of the case is an adjusting nut 27. Connected with the diaphragm26 and projecting outwardly of the threaded end of the casing through the adjusting nut is a rod. 28 having the outer end thereof pivotally connected with the operating lever 22, and encircling the rod 28 within the case 23 is a coiled expansion spring 29 having one end engaging the diaphragm and the opposite end abutting the adjusting nut.

In practice, when the pressure within the receiver rises to a predetermined point, determined by the tension of the spring 29 and the adjustment of the nut 27, the diaphragm 26 is actuated under the pressure of the fluid and the rod 28 moved outwardly, thereby swinging the operating lever 22 toward the lever 13. In the initial movement of the operating lever, one edge thereof engages the adjacent edge of the lever 13 and in the continued movement of the operating lever the lever 13 is swung about its pivotal connection with the particular post 10 and so engages the set screw let, thereby swinging the dog 11 out of the path of the adjacent shoulder 7. Simultaneously with this movement of the lever 13 under the action of'the operating lever, the spring 21 is placed under tension and swings the lever 16 about its pivotal connection with the remaining post 10 whereby the pin 19 on the outer end of the last-mentioned lever engages the adjacent edge of the arm 9 whereby the lever 16 is held stationary previous to the release of the shoulder 7 by the dog 11, the tension of the spring 21 increasing as the lever 13 is operated from the lever 22. Immediately that the dog 11 is moved out of the path of the shoulder 7 the spring 21 reacts and so swings the lever 16 and arm 9 with the effect to rotate the blade 41 out of engagement with the jaws 5 with a snap action. In the movement of the lever 16 under the action of the spring 21, the spring 20 reacts or contracts and throws the dog 12 into the path of the adjacent shoulder 7 on the locking plate 6. When the pressure within the receiver drops below the prescribed point, the above operation is reversed and the operating lever is swung under the action of the spring 29 whereby the lever 16 relieves the locking plate of the influence of the dog 12 so that the circuit will be recstablished.

By means of the set screws 1 1 and 17 any lost motion between the dogs 11 and 12 of the levers 13 and 16 respectively may be taken up, while through the medium of the shoulders 8 at the opposite ends of the locking plate, undue swinging movement of the switch blade is eliminated, each shoulder engages the adjacent dog immediatelv that the adjacent shoulder 7 is relieved of the influence of the dog.

From the foregoing description taken in connection with the accompanying draw ings, the construction. mode of operation and manner of employing my improved pressure controlled switch will be readily apparent.

I claim:

1. In an electric circuit controlling switch,

a blade capable of movement in one direction to open position and in the opposite direction to closed position, an arm connected to said blade for moving the latter, a locking plate secured to said arm transversely thereof, a dog pivoted adjacent to one end of said plate, a second dog pivoted adjacent to the opposite end of said plate, means acting upon said dogs to swing the latter into the path of movement of the plate, a lever pivoted for swinging movement and controlling said first dog, a second lever pivoted for swinging movement and controlling the sec ond dog, pins depending from said levers and adapted to engage said arm, a tension device connected with said levers and drawing the latter normally toward each other, and an operating lever pivoted atone end and disposed between said first levers and movable in one direction to engage the first lever to release the dog controlled thereby and place said tension device under tension whereby upon the release of the dog the idle lever will swing said arm to move the switch blade in one direction and in the opposite direction to engage the second-named lever and swing the latter to release the second-named dog and place said tension device under tension whereby upon the release of the dog the first-mentioned lever will actuate said arm to move the switch blade in the reverse direction.

2. In an electric circuit controlling switch, a blade capable of movement in one direction to open position, and in the opposite direction to closed position, an arm connected to said blade for moving the latter, a locking plate secured to said arm transversely thereof, a dog pivoted adjacent to one end of said plate, a second dog pivoted adjacent to the opposite end of said plate, means acting upon said dogs to swing the latter into the path of movement of the plate, a lever pivoted for swinging movement and controlling said first dog, a second lever pivoted for swinging movement and controlling the second dog, pins depending from said levers and adapted to engage said arm, a tension device connected with said levers and drawing the latter normally toward each other, an operating lever pivoted at one end and disposed between said first levers and movable in one direction to engage the first lever to release the dog controlled thereby and place said tension device under tension whereby upon the release of the dog the idle lever will swing said arm to move the switch blade in one direction and in the op posite direction to engage the second-named lever and swing the latter to release the second-named dog and place said tension device under tension whereby upon the release of the dog the first-mentioned lever will actuate said arm to move the switch blade in the reverse direction, and means for taking up lost motion between said dogs and the respective levers.

8. In an electric circuit controlling switch, a blade capable of movement in one direction to open position and in the opposite direction to closed position, an arm connected to said blade for moving the latter, a looking plate secured to said arm transversely thereof, a dog pivoted adjacent to one end of said plate, a second dog pivoted adjacent to the opposite end of said plate, means acting upon said dogs to swing the latter into the path of movement of the plate, a lever pivoted for swinging movement and controlling said first dog, a second lever pivoted for swinging movement and controlling the second dog, pins depending from said levers and adapted to engage said arm, a tension device connected with said levers and drawing the latter normally toward each other, an operating lever pivoted at one end and disposed between said first levers and movable in one direction to engage the first lever to release the dog controlled thereby and place said tension device under tension whereby upon the release of the dog the idle lever will swing said arm to move the switch blade in one direction and in the opposite direction to engage the second-named lever and swing the latter to release the secondnamed dog and place said tension device under tension whereby upon the release of the dog the first-mentioned lever will actuate said arm to move the switch blade in the reverse direction, and set screws carried by said dogs for taking up lost motion between the same and the respective levers.

In testimony whereof I afliX my signature in presence of two witnesses.

WILLIAM E. GORTON. Witnesses:

L. L. RoEsLE, R. J. KENNARD.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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