US1596968A - Magnetically-operated valve - Google Patents

Description

c c HANSEN ET AL MAGNETICALLY OPERATED VALVE Filed Oct. 3. 1921 Aug. 24 1.926.

Patented Aug, 24, 1926.

UNITED STATES PATENT OFFICE.

CHARLES C. HANSEN AND HERBERT V. HANSEN, OF FORES'I PARK, ILLINOIS, AS-

SIGNORS TO REFRIGERATING SPECIALTIES COMPANY. OF CHICAGO, ILLINOIS, A.

CORPORATION OF ILLINOIS.

MAGNETICALLY-OPERATED VALVE.

Application filed October 3, 1921. Serial No. 505,149.

The invention relates to controlling mechanism for valves. In valves for certain classes of work, such as those used for controlling the delivery of refrigerant and condensing Water in refrigerating systems, it is desirable to hold the valve on its seat by pressure of a spring and also by pressure of the fluid.

The object of the invention is to provide magnetically operated mechanism for opening the valve against the force of the closing spring and the fluid pressure on the valve and this object is attained by providing a hammer armature and a connection which will impart a hammer blow to the valve-stem, of suflicient force to overcome the spring and fluid pressure against the valve and which may be hel open magnetically after the hammer blow has been imparted to the valve.

The invention consists in the several novel features hereinafter set forth and more particularly defined by claims at the conclusion hereof.

In the drawings: Fig. 1 is a view, partly in section and partly in elevation, of mechanism embodying the invention. Fig. 2 is a front elevation.

The invention is exemplified in connection with a valve comprising a casing 4: having an inlet 5 for fluid under pressure therein and an outlet 6 for fluid, a wall 7 formed with a duct 9 between the inlet and outlet and formed on its underside with a valveseat 8. A val e 10 adapted to close against seat 8 is provided with'a stem 11 which is guided in a plug 12 and a stem 13 which extends upwardly through a packing box 14 provided at the upper end of the casing. A spring 15 in plug12 is adapted to close the valve. The valve casing 4c is secured in a bracket 15 which is bolted to a suitable back-board 16. This valve exemplifies one which is normally closed by a spring and which, when closed, is additionally held against its seat by fluid under pressure.

The mechanism for opening the valve comprises a helix 17 which is suitably secured by bolts 18 which pass through a head 19 at the front of the helix into a bracket 20 which is suitably secured tothe backboard 16. A suitable magnet core 21 is provided in the helix. An armature 22, adapted to be influenced by the core 21, is secured to the hammer lever 23 which is heavily weighted and is pivoted, at 24, to a lug 25 projecting forwardly from the bracket 20. The lever comprises a pendant arm 26 to the lower end of which is pivoted a link 27 for operating a toggle linkage. Said linkage comprises a link 28, the upper end of which is pivoted, at 29, to a. lug 3O projecting forwardly from the bracket 20 and the lower end of said link is pivoted, at 31, to the upper end of a link 32, the lower end of which is pivoted, as at 33, to a slide 34. which is mounted in a boss formed on the upper portion of the bracket 15 in which the valve is mounted. Slide 34 comprises a metallic shell 36, a body 37 fixed in said shell and formed of bakelite or other non-conducting material. Pivot 33 is held in a lug 39 which is screw-threaded into the body 37 of the slide 34. An abutment or hammer'lO is screwthreaded into the lower end of the body 37 and is adapted to strike the upper end of the valve stem 13 and is normally spaced therefrom so that when it is operated by the magnet it will not engage the stem until it approaches the end of its stroke. An abutment 41 is formed on arm 26 of lever 23 to engage a stop-lug 42 on the lug 30 to limit the retractile stroke of the'armature lever 23.

Normally the valve 10 is closed and the helix 17 is deenergized. When the helix is energized, it will magnetize the core 21 which will attract the armature 22 and operate the lever 23 to operate the toggle linkage through link 27. During the initial stroke of the lever 23, there is no substantial resistance to the operation of the linkage and, as a result, the lever 23 will acquire suflicient momentum so that when the hammer 10 encounters the upper end of stem 13, the latter will impart a hammer blow to the stem with sufficient force to overcome the force of spring 15 and of fluid pressure in the inlet 5 of the valve casing. The arrangement of th toggle linkage is such that its effective movement to shift the valve occurs While it approaches the dead center of the linkage and, there fore, the linkage will have great leverage in operating the hammer 40. When the valve is open, the members of the linkage will be in substantial dead-center relation so that the force of the spring 15, which is then being applied to the hammer 40, will be substantially ineffective to retract the linkage. As a result, the minimum magnetic force in the core 21 will be sufficient to retain the lever 23 and th valveoperating connection in position to retain the valve open. The lever 23 is weighted at on side of its pivot 24 or formed so that there will be a sufficient preponderance of weight at one side thereof to cause the lever to retract and release the linkage when the helix 17 is deenergized. Lever 23 being weighted, as aforesaid, ac uires momentum and force during its initial movement to impart a quick movement to the hammer 40 so that it will, in turn, impart a blow to the valve stem.

The invention exemplifies valve-operating mechanism which operates a sprin r closed valve by a hammer blow; in whic the toggle linkage is used to provide an effective leverage for opening the valve, and in which minimum magnetic force is required to retain the valve-operating connection in position to hold the valve open.

The invention is-not to be understood as restricted to the details set forth, since these may be modified within the scope of the appended claims, without departing from the spirit and scope of the invention.

Having thus described the invention what we claim as new and desire to secure by Letters Patent, is

l. The combination with a valve casing and a normally closed valve therein of mech anism for opening the valve comprising an electro-magnet, a pivoted weighted lever to which the magnet armature is rigidly secured, and means operated by the lever to impart a hammer blow to the valve.

2. The combination with a valve casing and a normally closed valve therein of mechanism for opening the valve comprising an electro-magnet, and a pivoted weighted lever to which the, magnetarmature is rigidly secured, and means operated by the lever to impart a hammer blow to the valve, said lever being pivoted tobe retracted by gravity.

3. The combination with a valve casing and a valve therein of mechanism for shifting the valve comprising an electro-magnet, a pivoted weighted lever to which the magnet armature is rigidly secured, and a toggle linkage, operative by said lever to impart a hammer blow to the valve.

4. The combinationwith a valve casing and a normally closed valve therein of mechanism for shifting the valve comprising an electro-magnet, a toggle linkage held in substantially dead-center relation when the valve is open, and a pivoted weighted lever operable by the magnet, connected to oper-- 5. The combination with a valve casing and a normally closed valve therein of mechanism for opening the valve comprising an electro-magnet, a slidable hammer to operate the valve, a toggle linkage, and a pivoted weighted lever operable by the magnet to operate the linkage to impart a blow to the hammer.

6'. The combination with a valve casing and a valve therein movable between two predetermined points, of mechanism for shifting the valve from one point to the other comprising an electro-magnet, and a toggle linkage comprising a plurality of serially connected links operatively connected to the -armature of the magnet, one end of the linkage being fixedly pivoted and the other end being applied to operate the valve,

said linkage being adapted to be operated by the magnet when it is energizedto impart a hammer blow to shift the valve to said other point.

7. The combination with a valve casing and .a valve therein, of mechanism for shifting the valve comprising an electro-magnet, and a toggle linkage comprising a plurality of serially connected links operatively connected to the armature of the magnet, one end of said linkage being applied to operate the valve, said linkage being adapted to impart a hammer blow to the'valve when the magnet is energized and being in substantially dead-center relation when the valve is 0 en.

8. The combination with a valve casing and a valve movably mounted therein, of mechanism for shiftin the valve comprising an electro-magnet', an a toggle linkage comprising a; plurality of serially connected links operatively connected to the armature of the magnet, one end of thelinkage being fixedly pivoted and the other end being applied to operate the valve, said linkage be-- ing adapted to be operated by the magnet when it is energized to impart a hammer blow to shift the valve, said linkage being in substantially dead center relation when it is in its operative position.

9. The combination with and a valve movable therein, of mechanism for shifting the valve comprising an electromagnet, and a toggle linkage comprising a pair of links having their inner ends pivoted to each other, one of said links being operatively connected to the armature of the magnet and having its outer end fixedly pivoted, the other link having its outer end movable and applied to shift the valve, said linkage being adapted to be operated by the magnet when it is energized, to impart a hammer blow to shift the valve.

CHARLES C. HANSEN. HERBERT V. HANSEN.

a' valve casing,

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