Chlorinator having trip device actuated by line pressure difference

Claim 2

In a chemical feeder mechanism for a body of fluid: a. a valve for controlling communication between a chemical solution and another body of fluid; b. a trip device having one part connected to said valve and having a second part; c. motor means connected to said second part for slowly moving said second part in a direction to open said valve when said trip device is coupled; d. means operable upon predetermined movement of said one part for tripping said trip device whereby said valve is free to move to closed position; e. means for moving said valve to closed position following tripping of said trip device; and f. said trip device being reset upon return movement of said second trip device part.

Claim 3

The chemical feeder as set forth in claim 1 together with means for cyclically operating said motor means.

Claim 4

The chemical feeder as set forth in claim 1 together with means for adjusting the position at which said tripping means is operative whereby the time period of valve opening is varied thus to determine the volume of chemical introduced.

Claim 5

The chemical feeder as set forth in claim 3 together with a circulating pump for said body of fluid and means for operating said motor means when pump operation is initiated.

Claim 6

The chemical feeder as set forth in claim 3 together with a circulating pump for said body of fluid, said motor means being fluid operated and connected through a restriction, to one side of said pump.

Claim 7

The chemical feeder as set forth in claim 3 together with a circulating pump for said body of fluid; said motor means being fluid operated and connected through a restriction, to one side of said pump; said valve having a discharge side also connected to one side of said pump whereby the rate of movement of said pump motor and the rate of injection of chemical solution both vary correspondingly with pump pressure thus to maintain volumetric displacement per cycle regulated.

Claim 8

The chemical feeder as set forth in claim 1 together with a timer for cyclic operation of said motor means.

Claim 9

The chemical feeder as set forth in claim 1 together with a timer for cyclic operation of said motor means, said motor means including a power spring cyclically retracted by a cam forming a part of said timer, said motor means also including a yielding spring device for return movement of said second trip device part.

Claim 10

The chemical feeder as set forth in claim 1 together with means for adjusting the position at which said tripping means is operative whereby the time period of valve opening is varied thus to determine the volume of chemical introduced, said adjusting means comprising a stop interposed in the path of retracting movement of said one trip device part, and said trip device parts being yieldingly coupled by spring means.

Claim 11

The chemical feeder as set forth in claim 1 together with means for adjusting the position at which said tripping means is operative whereby the time period of valve opening is varied thus to determine the volume of chemical introduced, said adjusting means comprising a wedge interposed between opposed surfaces of said trip device parts and operative to move said trip device parts away from a normal position to separate the same upon predetermined retracting movement of said trip device parts.

Claim 12

In a chemical feeder mechanism for a fluid system having a pump: a. a normally closed valve for controlling the flow of chemical to the system; b. a two part linkage for moving the valve to open position; c. a resettable releasable coupling between said linkage parts; d. one of said parts being connected to said valve; e. fluid motor means connected to the other of said parts and operable to move said linkage parts when coupled to valve opening position; f. a fluid power connection between said pump and said fluid motor means; g. means restricting the movement of said motor means whereby time is consumed during movement of said linkage; and h. means operable upon a predetermined movement of said linkage to release said releasable coupling.

Claim 13

In a chemical feeder mechanism for a fluid system having a pump: a. a normally closed valve for controlling the flow of chemical to the system; b. a two part linkage for moving the valve to open position; c. a resettable releasable coupling between said linkage parts; d. one of said parts being connected to said valve; e. fluid motor means connected to the other of said parts and operable to move said linkage parts when coupled to valve opening position; f. a fluid power connection between said pump and said fluid motor means; g. means restricting the movement of said motor means whereby time is consumed during movement of said linkage; and h. means operable upon a predetermined movement of said linkage to release said releasable coupling.

Claim 14

The chemical feeder as set forth in claim 11 in which said valve has an outlet connected to said fluid system whereby the rate of flow of chemical into the system is a function of system pressure; said restricting means being a small cross section part of said fluid power connection whereby said fluid motor means also operates at a rate that is a function of system pressure whereby volumetric regulation of injected chemical is obtained.

Claim 15

A chemical feeder mechanism for a swimming pool system or the like having a circulating pump: a. a normally closed valve for controlling the flow of chemical from a supply tank, said valve having an outlet and a movable valve closure; b. a fluid motor for moving said valve closure; c. means biasing said fluid motor in one direction; d. conduit means connecting said fluid motor to said pump inlet, said conduit means having a restriction to limit the rate of operation of said fluid motor; e. a releasable latch between said closure and said fluid motor for movement of said closure by said fluid motor; and f. means for releasing the latch upon predetermined movement of said closure whereby said valve returns to closed position notwithstanding continued operation of said fluid motor.

Claim 16

A chemical feeder mechanism for a swimming pool system or the like having a circulating pump: a. a normally closed valve for controlling the flow of chemical from a supply tank, said valve having an outlet and a movable valve closure; b. a fluid motor for moving said valve closure; c. means biasing said fluid motor in one direction; d. conduit means connecting said fluid motor to said pump inlet, said conduit means having a restriction to limit the rate of operation of said fluid motor; e. a releasable latch between said closure and said fluid motor for movement of said closure by said fluid motor; and f. means for releasing the latch upon predetermined movement of said closure whereby said valve returns to closed position notwithstanding continued operation of said fluid motor.

Claim 17

The chemical feeder as set forth in claim 13 in which said latch is a friction catch to reestablish a coupling between said closure and said fluid motor when said fluid motor is deenergized.

Claim 18

The chemical feeder as set forth in claim 13 in which said releasing means is adjustable to vary the volume discharged per cycle of operation.

Claim 19

The chemical feeder as set forth in claim 13 together with conduit means connecting said valve outlet to the pump inlet.

Claim 20

The chemical feeder as set forth in claim 13 together with conduit means connecting said valve outlet to the pump inlet; said releasing means being adjustable to vary the volume discharged per cycle.