US469462A - Automatic draft-regulator - Google Patents

Description

3 Sheets-Sheet 1. I. P. & P. O. BEERS.

(No Model.)

AUTOMATIC DRAFT REGULATOR. No. 469,462. Patented Feb. 23, 1892.

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Patented Feb. 23. 1892 7 IIIIIL A.

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I. F. 86 F. G. BEERS. AUTOMATIC DRAFT REGULATOR.

No. 469,462. Patented Feb. 23, 1892.

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IRA F. BEERS AND FREDRIO C. BEERS, OF ELMIRA, NEW YORK.

, AUTOMATIC DRAFT-REGULATOR.

SPECIFICATION forming part of Letters Patent No. 469,462, dated February 23, 1892.

Application filed July 30,1881. Serial lT o. l0l,l82. (No model.)

To all whom, it may concern.-

Be it known that we, IRA F. BEERS and FREDRIO C. BEERS, of Elmira, inthe county of Ghemung, in the State of New York, have invented new and usefulv Improvements in Automatic Draft-Regulators, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

Our invention relates to draft-regulators which are regulated by a thermostat and electrical connections, the thermostat operating as a switch.

Our object is to produce a draft-regulator simple in construction, cheap in cost, effective in operation, and of great durability, in which the operation of a heat-controlled thermostatic bar and its deflection either way by the temperature will cause it to make a circuit, release a scape-trip, and open or close the draft, the draft-chain being controlled by an arm connected to a rotatable shaft, and which is rotated by means of a weighted cord and pulley whenever the trip is released, said trip being automatically reset with each half rotation of the pulley and its shaft, which rotation also breaks the circuit theretofore made by the thermostat.

Our invention consists in the several novel features of construction and operation hereinafter described, and which are specifically set forth in the claims hereunto annexed.

It is constructed as follows, reference being had to the accompanying drawings, in which- Figure 1 is a front elevation of the apparatus complete. Fig. 2 is a side elevation thereof. Fig. 3 is a detail showing the scape-wire just tripped and released from the armature of the electro-magnet. Fig. 4: is a sectional detail showing the mounting of the contactfingers and a circuit made through the upper one, the screw, and the main shaft. Fig. 5 is an enlarged detail showing the means for adj usting the play of the armature of the electro-magnets when it is operated to make the trip of the scape. Fig. 6 is a detail showing a mode of mounting of the damper-bars e 6, so that they cannot turn nor slip lengthwise. Fig. 7 is an elevation of a furnace with the regulator set up and connected to the main draft-door and to the check in the pipe. Fig.

8 is a plan of the regulator connected to a valve in a pipe. p

A is the main frame, consisting of the vertical side rails 1, the crossrails 2, and the anglebar 3, secured to the front by the screw 4. and extending upward, and at its upper end provided with a bearing for the shaft a, the other bearing being in the upper corner of said frame. A deeply-grooved pulley b is mounted loosely upon this shaft, and c is a ratchet-wheel secured upon said shaft, 0 being a spring-pawl engaging with said ratchet to prevent the pulley from turning backward, and c" is an endless cord fitting over said pulley in said groove, extending down through and around the weighted pulley c, which is suspended in the bight of the cord, and 0 is the operating-weight supported by the cord between said pulleys.

In the front projection of the shaft to the scape or trip wire (1 is mounted, flattened on one side, as at d, (see Fig. 6,) or otherwise adapted to receive the end of the set-screw d" and be held thereby, so that it will not twist or slip lengthwise, said scape projecting an equal distance on each side of the shaft. In the outer ends of the shaft we adj ustably mount the damper-bars c 6, each provided with an arm e,to which the chain cis pivotally connected by a screw inserted through a link, the bar 6 being connected to the draftdamper h upon the front of the heating apparat'us B and the bar a being connected to the check-damper h in the smoke-pipe h, and these bars are adjusted so that when the draft is open and the check is closed the bar 6 will stand above the shaft and the bare below it, both beingin the same vertical plane, as shown in Fig. 1 and 2.

In Fig. 7 we show the draft closed and the check open, so that the bar 6 is below and the bar 6 is above the shaft. Electromagnets O are mounted upon but insulated from the lower part of the frame A, one of said magnets being connected by wire on to the battery D and the other magnet being connected to the shaft a by the wire m, binding-screw 4, and angle-bar 3, which is secured to the frame by said screw at, and which has at its upper end a bearing for said shaft a. The magnets are connected together by a wire m".

The shaft is likewise electrically connected to the frame. From the battery the wire 01 leads to the thermostatD', being directly connected to the thermostatic bar 19, which is composed of two pieces of material of different expansible properties, secured rigidly at one end to a backing and insulated therefrom. Upon said backing we mount and insulate the studs 19, in which the contact-points r and r are screwed, their points being, respectively, on either side of the free end of the thermostatic bar.

Upon the frame we mount andinsulate the spring contact-fingers s and If, one standing above and the other below the shaft and separate therefrom, as shown in Fig. 4. A wire 8 connects the finger s to the contact-point 1", and a wire t connects the fingert to the point r. A screw 10 is adjustably inserted into the shaft, and. as the shaft is rotated it makes a connection with the fingers alternately. The armature o of the electro-magnet is pivoted at one end to the frame, and is supported by a coiled spring 21 around the screw 1/ which screw regulates the downward movement of the armature when a circuit is closed, and o is an arm mounted upon the frame and projecting out and over the armature, and regulates its upward movement. Normally one end of the scape. is in engagement with the free end of the armature, as shown in Fig. 1.

As shown in Fig. 7, the thermostat is mounted upon the wall of a room and connected to the regulator and battery. \Vhen the temperature is normal, the regulator will stand in the position shown in Fig. 1, the draft will be closed, and the check open. Then when it rises above normal the free end of the thermostatic bar will be deflected by the difference in expansion over against the contact-point r and makes a circuit through the wire finger s, screw 10, shaft a, arm 3, wire m, and electro-magnet, and depresses the armature and releases the scape cl, and then the weight 0 will cause the pulley b to 1'0- tate. When by such rotation the screw to is disengaged from the finger s, the circuit is broken and the armature flies up again, so that when the other end of the scape comes around it engages with-the armature again at the completion of the half-rotation of the pulley. By this same half-rotation the arm 6 is lowered and the arm 6 is raised, which closes the draft and opens the check, reversing the position of these arms, as shown in Fig. 2. This brings the screw w into engagement with the finger t. lVhen the temperature lowersand the thermostatic bar is deflected to the right and makes a circuit through the contact-point r, then the pulley makes anotherhalf-rotation, closes the check, and opens the draft. hen the weight 0 is run down, we throw the pawl 0 out of engagement with the ratchet and then raise the Weight, thus rewinding, and when it is clear up we throw the pawl back into engagement. Then the pawl is out, the pulley is free to rotate upon the shaft for the rewinding.

In Fig. 8 we show both chains connected to a rotating damper in a pipe, or only one chain need be used, provided a counterbalanceweight is added to the outer arm upon the damper-shaft.

hat we claim as our invention, and desire to secure by Letters Patent, is-

1. In a draftregulator, the combination of a shaft rotatabl y supported in a suitable frame, a pulley mounted thereon, a weighted cord wound on the pulley, an electro-magnet, an armature, a scape projecting from the shaft and engaging the armature, a battery, a thermostat, va make-and-break device .operated by the pulley, suitable electric connections between the battery, electromagnet,

thermostat, and make-and-break device, and oppositelyextending arms mounted upon said shaft and having connection with the dampers to be operated, all substantially as set forth.

2. In a draft-regulator, the combination of a shaft rotatably supported in a suitable frame, a pulley mounted thereon, a weighted cord wound upon said pulley, an electro-magnet, an armature, anadjustable scape projecting from the shaft and engaging the armature, a battery, a thermostat, spring-fingers supported upon the frame adjacent to the shaft, a projecting screw or lug on the shaft and adapted to engage with said fingers alternately when the shaft rotates, suitable electrical connections between the battery, thermostat, springfingers, and electro magnet,

and oppositely-extending adjustable arms mounted on opposite ends .of the shaft and connected with the dampers to be operated, substantially as set forth.

In witness whereof we have hereunto set our hands this 20th day of July, 1891.

IRA F. BEERS. FREDRIG O. BEERS.

In presence of- IRA S. BEERS, M. F. BEERS.

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