US1148465A - Refrigerating system. - Google Patents

Description

G. J. SAYER.

REFBIGERATING SYSTEM.

APPLICATION FILED FEB. 2, 1914.

Patented July 27, 1915.

PATENT OFFICE.

GEORGE J. SAYER, OF CHICAGO, ILLINOIS.

BEFB-IGERATING SYSTEM.

Specification of Letters Patent.

Patented July 2'7, 1915.

Application filed February 2, 1914. Serial No. 816,021.

To all whom it may concern:

Be it known that I, GEORGE J. SAYER, a citizen of the United States, residing at Chicago,in the county of Cook and State of Illinois,have invented a certain new and useful Improvement in Refrigerating Systems, of which the followin'gisa full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates to refrigerating systems and more particularly to that class of refrigerating systems in which a plurality of rooms or chambers are supplied with refrigerants from a common source.

The supply of refrigerant to any one room may be stopped when the temperature of that room has reached a predetermined amount. and in which the actuations of a prime mover operating therefrigeravting pump are controllable in such a'way that whenever the supply of refrigerant to all of the rooms is cut off, that the operations of said prime mover then cease, but that the stoppage of flow of refrigerant to any one or more of said rooms, less than all, will not stop or interfere with the operations of said prime mover.

My invention concerns itself more particularly with the mechanism which is designed individually for each room to control the How of refrigerant thereto and which at the same time has means to effect control of the motor.

I will explain my invention more in detail by reference to the accompanying drawings, in which- Figure 1 sets forth diagrammatically a system arranged in accordance with my invention; Fig. 2 is a view partially in section of the individual room controlling mechanism, and Fig. 3 is a fragmentary view of a portion of this mechanism more clearly to reveal features of construction.

Referring more particularly to Fig. 1, I show a plurality of rooms 1, 2 and 3 to which refrigerant is to be supplied under the control of my improved devices 4. The refrigerant leaves the rooms by means of the tubes 1 show a refrigerating pump 6. although I do not indicate its association with the tubes 7 by means of which it supplies refrigerants to the rooms, nor its connection with the tubes 5 by which it withdraws th'"refrigerant from the rooms. Of

course, suitable mechanism such as a condenser and storage compartment may be utilized, or whatever other equipment shall be found necessary; nor have I shown the expansion valve which is preferably interposed between the device 4 and the room in the tube 8. The refrigerating pump 6 is operated by a suitable motor 9 and this 1110-.

tor receives its current from a suitable source of supply 10 here indicated as a generator.

It will be seen that the connection to close the circuit between the motor and the generator can be closed at either of the devices 4 as will be apparent hereafter, but that should the connections of all of the devices 4 be open, that then the motor will be without current and will cease to operate the refrigerator pump6.

My improved device 4 is shown more clearly in Figs. 2 and 3 and consists in the form herein disclosed ofa valve casing 11 fixedly secured to a mounting bracket 12. This bracket 12 also carries other parts as will be presently explained. The valve casing 11 carries a valve 13 suitably supported upon a spindle 14 passing through the stuffing box 15. Aspring 16 normally holds the valve 13 against its seat 17. The valve is adapted to control the flow of fluid from the tube 18 toward the tube 8, which leads directly into the refrigerating chamber. The position of the valve 13 is regulated by a thermostat 19 as will presently appear. The valve spindle 14 has a socket 20 at its lower extremity by means of which the valve spindle is moved through the interposition of the lever 21 which lever 21 is preferably mounted upon the bracket 12. The spindle at its lower extremity also carries an insulating button 23 to engage and actuate a switch arm 24, which switch arm is adapted to close circuit with a stationary switch' ele- ,ment 25 mounted on the insulating arm 26. A spring 27 normally tends to hold the switch element 24 away from the switch element 25. The circuit which is closed by this switch extends from the generator 10 through conductor 28, switch arm 24, switch element 25, conductor 29, motor 9, conductor30. back to the generator or source of supply 10. Similarly the circuit through the motor is controlled by parallel circuit connections for the other devices 4.

Now in order to operate the valve 13 either to its closed or open position, I utilize a motor 31 mounted upon the bracket 12, which motor through the interposition of the pinions 32, 33, 34 and 35 drives the wheel 36. The wheel 36 carries a conducting ring "37 having an aperture 38 at one portlon thereof, the rim of said aperture being bushed by the insulating bushing 39. A

the ring 37 at all times and is electrically connected by means of the .conductor 43 with one terminal of the motor 31., The other terminal of the motor is connected by means of the conductor 44 with one terminal of the set of batteries 45, the other terminal of said set of batteries being connected by means of the conductor 46 with one terminal of the thermostat 19. The thermostat also has two other contact terminals 47 and 48 respectively and these are connected re spectively to contact springs 49 and 50. The contact springs 49 and 50 normally tend to engage the ring- 37 and in fact do so, except whenever either one of these springs is over the aperture 38, at which time that particular spring is not in electrical contact with the ring 37. e

In the illustration as shown, the valve is shown as closed, the Wheel 36 having moved in the direction of the arrow, as shown, and

current having been supplied by means of the spring 49 to the motor. The motor was driven until the aperture 38 came under the spring 49, at which time this circuit was broken, and at which time this valve was fully closed. The motor then stopped andno further movement of the valve takes place until the thermostatic element 19 has moved into contact with the conducting post 48, at which time current is supplied to the spring 50 to again start the motor, which will thereupon drive the Wheel 36 until the aperture 38 is under the spring 50 so that this spring 50 then no longer makes contact with the ring 37. At this time the valve will be fully open. This condition of things will then obtain until the thermostatic element 19 again makes contact with the post 47.

- Now'in order to move the Valve from one position to the other the lever 21 has a slot 51, which slot is in operative relation to a roller 52 carried by the wheel 36-. Thus as this wheel 36 is rotating, it tilts the lever 21 about its pivotal point 22 and when the roller 52 is in its uppermost position, the valve is fully open, and when the roller is in its lowermost position the valve is fully closed.

From what has been described, the nature of my invention will be entirely clear to those skilledin the art, and it will also be clear that my invention is susceptible to a variety of diiierent modifications without departing from its spirit.

Having however thus described one form which my invention may take, what I claim as new and desire to secure by Letters Patent is:

1. In a refrigerating system the combination with a plurality of valves, of an equal plurality of motors for moving said respective valves into their closed or open position, means interposed between each motor and its associated valve to limit each individual action of the motor to move its associated valve from one alternative position to the other, and an electric circuit conjointly controlled by all of said valves. 2. In a refrigerating system the combination with a plurality of valves, of an equal plurality of motors for moving said respective valves into their closed or open position, means interposed between each motor and its associated valve to limit each individual action of the motor to move its associatedvalve from one alternative position to the other, and a switch element movable conjointly with its associated valve, said switch elements conjointly controlling an electric circuit.

In witness whereof, Ihereunto subscribe my name this 17th day of January, A. D.

GEORGE J. SAYER. Witnesses O. M. A. CHAPIN, JOHN M. Pn'rsason.

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