US2060712A

US2060712A - Temperature controlled switch

Info

Publication number: US2060712A
Application number: US8796A
Authority: US
Inventors: Judson W Wright
Original assignee: Individual
Current assignee: Individual
Priority date: 1935-03-01
Filing date: 1935-03-01
Publication date: 1936-11-10
Anticipated expiration: 1953-11-10

Description

Nov. 10, 1936. J. w; WRIGHT TEMPERATURE CONTROLLED SWITCH Filed March 1, 1935 Patented 10, 1936 PATENT OFFICE Claims.

This invention relates to temperature controlled switches and the object of the invention is to provide a switch for use in connection with a. hot water tank and arranged to turn oil or on. in ac- 5 cordance with the expansion or contraction of the tank.

Another object of'the invention is to provide a temperature controlled switch having a longi-- tudinally movable rod operating through a toggle joint to actuate the switch.

A further object of the invention is to provide an arm pivotally supported on the top of the tank in which one end of the arm is connected to' the bottom of the tank and the other end of the arm is connected to the temperature controlled switch which is connected to the bottom of the tank so that expansion of the tank to a predetermined extent will move the temperature controlled switch to the open position and contraction ofv the tank will allow movement of the switch to the closed position.

These objects and the several novel features of the invention are heneinafter more fully described and claimed and the preferred term of construction by which theseobjects are attained is shown in the accompanying drawinggin which- Fig. l is an elevation of a hot wa'terjtank equipped with my temperature controlled switch.

Fig. 2 is enlarged section taken on line 2--2 05* Fig. l and showing the switch mechanism. I

3 is a section taken on line 3-3 of'Fig. 2.

Fig. 4 is an enlarged section taken on line fl4 u of '2. I g

The switch comprises a housing I which may be octagonal in form, as shown in Fig. 2, and which may be provided with a cover 2-, a portion of which is shown in Fig. 2.. The housing is provided with a lug 3 and a screw 4 shown in Fig. 3 extends through the lug 3 andis threaded into. the bottom of the housing. An arm 5 is pivotally mounted on the screw 4 and the end of the-arm 5 opposite the 'screw 4 is provided with a contact member 6, shown in Figs. 2 and 4, which is secured in 'the end of the arm 5 and insulated therefrom by the insulator 1. A wire 8, shown in Fig. 2; is connected to the contact 6 and this wire extends through an insulator 9 in the wall of the housing and is connected in the electric circuit to be controlled. A bracket i0 is secured to the wall of the housing on the opposite side of the housing from the lug 3 and this bracket provides a support for theoarm H which is pivotally connected to thebracket Ill at the point l2. The end of the arm ll opposite the pivot l2 carries a screw i3 which extends through a slot M in the arm 5.

' chored in the housing I while the other end of the A vertical rod i5 is movable longitudinally through the housing 8 and the rod |5 is secured to the arm il by the screw l6 which extends throughthe arm l l and is threaded through the rod I5, as shown more-particularly in Fig. 3. The lower 5 end oi the rod i5 extends below the housing and a coiled spring I! is positioned about this lower end and may be adjusted in tension by means of the not i B threaded onto the lower end of the rod.

vThe bracket l0 carries an insulation block IS in which a contact screw 26 is threaded and the upperend 2| of this contact screw is adapted to be contacted by the contact 6 carried in the arm 5. A wire 22 leads from the contact screw spring is secured beneath the headof the screw it. This spring urges the arm 5 to turn toposition to bring the contact'ti into engagement with the end 2| of the'contact screw 2|].

As shown in Fig. 1, an arm "2% is pivotally mounted in a bracket 21 on the pipe 28 extending from the top of the hot water tank 29. The end 30 of the arm 26 is connected by means of a wire 3| with a clip 32 which is hooked under the bot- L tom edge of the tank 29, while the, opposite end of the arm 26 is connected by means of a. wire 33 to the turnbuckle 34 which in turn is connected to the upper end of the rod |5.- A wire 35 shown in Figs. 1 and 2 is connected .to the housing I behind the rod l5 and the lower end of the wire 35 is provided with a clip engaging underthe lower edge of the'tank.

In operation, when the tank is cold, the tumbuckle 34 is adjusted to allow the spring I! to draw the rod l5 downwardly and allow the con- '45 tact vIi to engage the point 2| of the contact screw 20. This allows current to flow through the wire 8, through the

contacts

6 and 2| to the wire 22 and while not here shown, thiscircuit. is connected to operate thegas valve for heating water. As the water in the tank becomes warm, the tank is warmed and as the tank becomes warmed, it expands slightly moving the pivot 3i for the arm 26- upwardly "in relation to the tem-, I perature controlled switch. This is due tofthe Q5 fact that the opposite ends of the arm 28 are. anchored to the bottom of the tank and any expansion of the tank will cause movement of the pivot ill upwardly in relation to the clips I2 and 35 at the bottom of the tank. Due to the wire 3i, this upward movement of the pivot 31 causes the arm 26 to turn slightly in a counterclockwise direction thus raising the rod it against the tension of the spring l1 and by means of the screw It the rod H is turned on the pivot l2. As the rod II is turned. the screw II therein turns the arm 6 on the pivot 4 against the tension oi the spring 41 to quickly move the contact 8 away from the contact point 1| thus quickly breaking the circuit without drawing an are between the contact lnts. As the hot water is used out of the tan the tank will cool oi! and as it cools and contracts, the arm It will turn in a clockwise direction on the pivot I1 and this turning movement will be taken up by the spring II to move the rod II downwardly.

As the rod II is moved downwardly, the arm II is turned downwardly and by means oi the screw it riding in the slot it this toggle action quickly moves the arm 8 assisted by the spring 41 to bring the contact 8 back against the contact point 21 and re-establish the circuit. By means of the turnbuckle Q4, the amount of expansion required to operate the temperature controlled switch may be accurately adjusted so that the tank may be one-halt or three-quarters full of water before suflicient expansion has occurred to operate the switch.

From the foregoing description it becomes evident that the device is very simple and efllcient in operation, will not easily get out of order. is composed of few parts and provides a device which accomplishes the objects described Having thus fully described my invention. its utility and mode of operation, what I claim and desire to secure by Letters Patent of the United States is- 1. In a temperature controlled switch, a container. an arm pivotally supported on the top of the container, means connecting both ends of the arm with the bottom 0! the container, a pressure switch included in one connecting means and including a housing, a rod mo'vsble longitudinally through the housing. a spring tending to move the'rod in one direction. the connecting means being connected to one end of the rod to move the rod against the tension or thespring. a, pair 0! carried toggle arms movable by the rod. a contact by one 0! the'toggle arms. a contact in the hook trical circuit and a turnbuckle for adjusting said connecting means above the temperature controlled switch.

2. In a temperature controlled switch, a container, a support extending from the top of the container, an arm pivotally mounted on the 8129' port, a wire connecting one end of the arm with the bottom of the container, a temperature controlled switch including a housing connected to the bottom of the container, a rod movable longitudinally in the housing. a toggle switch movable to open position upon movement 0! till rod in one direction and movable to the closed position upon movement of the rod in the opposite direction, a spring tending to move the rod to close the switch and means connecting the rod with the opposite end or the arm.

3. In a temperature controlled switch, a container, a support extending Irom the top of the container. an arm pivotally mounted on the support. a wire connecting one end oi the arm with the bottom or the container, 0. temperature controlled switch, a wire connecting the temperature controlled switch to the bottom of the container. the pressure switch being provided with a movable operating member. a wire connecting said operating member with the opposite end of the arm, the arrangement being such that as the container expands the temperature controlled switch is moved to the open position and as the container contracts the temperature controlled switch ll moved to the closed position.

4. In a temperature controlled switch. a container. a support extending from the top of the container, an arm pivotally mounted on the sup-- port. means connecting one end of the arm with the bottom oi the container. a temperature oohtrolled switch. means connecting the tempestture controlled switch with the bottom of the container and means connecting the temperatme controlled switch with the opposite end of the arm whereby expansion or contraction of the container moves the arm pivot and arm to open or close the temperature controlled switch.

5. In a temperature controlled switch. a oustainer. an arm pivotally supported on the top 6 the container. means connecting the opposite endsotthe armvnththebottom'of thecontlhsd'. one means including a switch. spring means tendingto move the switehto the closed positlm and the arrangement being such that ll tb oustsinerexpendsthearmisturnedonltsplvotto move the switch to the open podtion W the tension of said spring.

JUDBON W. m.