US1270898A - Dash-pot. - Google Patents

Description

H- ,E. TRENT.

DASH POT.

APPLICATION FILED SEPT- 30. 1 916.

1 ,%?U,@9@m Patented July 2,1918.

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Specification of Letters Patent.

Patented JA a, rare.

Appltcation filed September 30, 1916. Serial No. 123,292.

To all whom it may concern:

Be it known that 1, HAROLD E. TRENT, a subject of the King of England, and a resident of Murraysville, in the county of Westmoreland and State of Pennsylvania, have invented a ne and useful Improvement in Dash-Pots, of which the following is a specification. 1

My invention relates to time-element devices and particularly to dash pots.

The object of my invention is to provide a dash pot of the sucker type that shall have means for easily varying the time period of its operation.

Heretofore, it has been customary to provide sucker dash pots with cooperating members and to rotate one with respect to the other to vary the area of engagement for the purpose of changing the time period of operationor the amount of retardation of the device to which it is connected.

In my invention, I provide two cooperating members having substantially plane engagin surfaces. The movable member is provi ed with a partially closed slit in its upper face for the reception of one end of an operating rod. If the rod is so ositioned as to act upon the moving member at its center, the operating time period of the device will. be the greatest and the time period will decrease as the position of the rod approaches the periphery of the movable memher.

In the accompanying drawings Figure 1' is a side view, partially in section and partially in elevation, of a device embodying my invention; Fig. 2 is a detail plan view of the dash pot embodying my invention, and Fig.

3 is a view taken along the line TIL-III of Fig. 1.

An electromagnet, in connection with which my invention may be used, comprises a winding 1, a movable core member 2 and a supporting frame or member 3. A member 4 of substantially U-shape is provided with laterallyprojecting arms 5 for the purpose of slidably engaging the supporting member 3. The member 4: is operatively connected to the cover member 6 of the dash pot 7. A positioning screw 8 and a nut 9 are provided for clamping the member 4 in any desired position with respect to the supporting member 3. Thus, by varying the position of the member 1 the movable core member 2 may be adapted to be actuated at different values of current traversing the winding 1.

The dash pot 7 comprises the cover member 6, a fluid-containing receptacle 10 having a substantially plane bottom 11 and a flanged upper portion 12 that is adapted to engage the cover member 6. A clamping member 13, a screw 14: and a nut 15 are provided for the purpose of securing the receptacle 10 in any desired position with respect to its cover 6. A rod 16 is secured to the lower end of the movable core member 2 and is provided with an annular recess 18 near its lower end. A piston 19 is adapted to cooperate with the bottom 11 of the receptacle 10 and is provided with a radial guideway or partially closed radial slot 20 on its upper face in which is disposed the enlarged lower end of the rod 16.

When the rod 16 is disposed adjacent the center of the piston 19 the maximum eohesive action between the piston 19 and the surface of the bottom 11 is obtained. However, when the receptacle 10 is moved to such position that the rod 16 occupies a position such as is shown by broken lines in Fig. 2 of the drawings, the movement of the core member 2 will not cause the piston 19 to move in a plane parallel to the bottom 11, but will cause the pistor 1 19 to pivot around one of its edges, and, consequently, thetime required to separate the piston 19 and the bottom 11 will be relatively short. Thus, by moving the receptacle 10 to various positions the rod 16 may be caused to assume such po- A sitions with respect to the piston 19 and any desired time period may be obtained.

Theclamping member 13 may be adapted to serve as an indicator to cooperate with a scale (not shown) that may be marked on u 1. A dash pot comprising stationary and movable cooperating members and means for varying the point of application of the actuating force of the movable member for iii) the purpose of varying the time period of cooperation between the stationary and movable members.

2. A timee1ement device comprising stationary and movable cooperating members, an actuating means for the movable member and means for operatively connecting the actuating means to various positions on the movable member to vary the time period of operation thereof.

,3. The combination with two cooperating sucker dash-pot members, and means for moving one member with respect to the other, of means for varying the position of the connection between the said means with respect to its associated member.

4. A time-element device comprising two cooperating members having substantially flat engaging surfaces, an actuating rod for one of the members and means for operatively connecting the rod to various points on the said member.

5. A dash pot comprising two cooperating members having engaging surfaces, means for actuating the said members and means for so connecting the actuating means to one of the said members that, when the members are separated, the engaging surface thereof, may assume various angles with respectto each other.

6. A dash pot comprising a receptacle having a substantially flat base, a piston therefor, said piston and receptacle being adapted to cooperate with each other to secure a suction therebetwecn, an actuating rod for the piston and means for connecting the rod in various positions with respect to the piston to obtain a variable time period in the operation thereof.

7 In a time-element device, the combination with a receptacle having a substantially.

flat bottom, of a piston therefor, and a rod for actuating the piston, said rod being adapted to be connected to different points on the piston to obtain various adhesive actions between the receptacle and the piston.

8. A dash pot comprising two cooperating members and means for so applying a separating force thereto that the time required to separate the same may be varied in accordance with the point of application of the said force.

9. A suction device comprising cooperating members, an actuating member normally HAROLD E. TRENT.

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