US1518127A

US1518127A - Ventilating apparatus

Info

Publication number: US1518127A
Application number: US476556A
Authority: US
Inventors: Baetz Henry
Original assignee: Individual
Current assignee: Individual
Priority date: 1920-05-05
Filing date: 1921-06-10
Publication date: 1924-12-09
Anticipated expiration: 1941-12-09

Description

Dec. 9, 1924- 1,518,127

H. BAETZ VENTILATING APPARATUS Original Filed May 5, 1920 2 Sheets-Sheet 1 5r QM H. BAETZ VENTILATING APPARATUS Original Filed May 5, 1920 2 Sheets-Sheet 2 I \lllllllll Jl- //v VEN ro/v Henry Bae fz.

A 7' TOR/VEX Patented Dec. 9, 1324.

VENTILA'IING APPARATUS.

Original application flied May 5, 1920,

To all whom, it may concem Be it known that I, HENRY BAETZ, a citizen of the United States, residing at St. Louis, State of Missouri, have invented certain new and useful Improvements in Ventilating Apparatus, of which the'following is a specification.

The present invention is directed to improvements in ventilating apparatus and is a division of my application on ventilation filed May 5, 1920, Serial No. 379,072, patented March 25, 1924, No. 1,488,225. The object primarily sought is to introduce fresh air into the room to be ventilated in such a manner as to enable the occupants to inhale and be surrounded by air which has not come in contact with the walls, floor or ceiling. A further object is to temper the outside air before discharging the same into the room, but not heating it to a higher degree than nature subjects it to, in order that the person breathing the air may obtain the same refreshing and invigorating efiect as would be obtained outdoors when the temperature is between 65 and 7 0 degrees. A further object is to deliver into the room fresh outside air warmed or tempered to various degrees that harmonize with the different degrees existing between the floor and ceilingof the room. This last object is attained by recognizing the presence of more or less defined zones of temperature in a heated room undergoing ventilation, and tempering the incoming air to harmonize with these zones. For example, an average room temperature of about 7 0 degrees Fahrenheit is considered comfortable, and when a thermometer which is hung about five feet above the floor registers that degree, the bodily comfort of the occupant is amply provided for. In this room it will be found that near the ceiling the thermometer will register considerably higher, probably 90 degrees, while at the floor it will be lower than 70 degrees and probably close to 60 or even degrees. This, of course, is due to the natural law that the warmer air rises while the cooler air falls. There thus exist between the floor andl ceiling zones of different temperature, these zones being in the form of horizontal strata which, while not sharply defined, may have Serial No. 379,072. Divided and this application filed June 10,

Serial No. 476,556.

their limits located with reasonable accuracy by means of a thermometer. Further and other advantages will be better apparent from a detailed descri tion of the accompanying drawings in w ich Figure 1 represents a vertical section through the outer wall and Window of a room showing in side elevation one form of temperature apparatus for giving effect to my ventilating system; Fig. 2 is an enlar ed top plan of the apparatus with parts bro en away; Fig. 3 is an enlarged front elevation with parts broken away; Fig. 4 is a side elevation of Fig. 3 with motor removed, and parts of the casing. walls broken away; Fig. 5 is an enlarged horizontal sectional detail on the line 55 of Fig. 4; and Fig. 6 is an enlarged horizontal sectional detail on the line 66 of Fig. 4.

Referring to the drawings, 1 represents a casing made preferably in two sections, the bottom section being provided with a blower or fan 2 operated preferably by an electric motor M positioned adjacent to one of the side walls of the casing, the opposite side wall being tapped by an air intake pipe P which admits outside air to the fan 2 as well understood in the art. Disposed between the side walls of the upper section of the casing is a transverse parti- I tion wall 3 extending a substantial distance along the height of the casing, said partition wall dividing the casing into two contiguous compartments, to-wit, a cold air compartment 4 at the back of the casing, and a hot air compartment 5 at the front of the casing, both compartments being in free communication with the mixing chamber 5 from which the air is discharged through the outlet opening 0 into the room to be ventilated. The compartment 5 is provided with steam circulating coils 6 connecting the feed and

drain headers

7, 8, respectively, said headers preferably tapping the front wall of the casing, the rotation of the fan 2 maintaining a constant of air from the compartment 5 into the chamber of the box, the said nozzles being controlled by valves or dampers 11, 11, respectively one of the nozzles being closed while the other is open, the air jets discharging alternately first through one nozzle and then the other for a purpose which will hereinafter more fully appear. The valves 11, 11' are secured to the free end of the lower bent arm of a vertically oscillating lever 12 fulcrumed about a pin 13 on a bracket or hanger 14 depending from the roof of the box 9, the upper arm of the lever operating through an elongated slot 8 in said roof and terminating at its upper end in a weight or ball 15. Supported by the hanger 14 at a point below the fulcrum of the lever12 is the inner end of an air motor shaft 16, the opposite end passing through and outside the casing wall and beyond the outer. supporting bearing 17 of the shaft, the end of the shaft projecting beyond the bearing 17 being provided with a worm pinion 18 meshing with a worm gear 19 at the adjacent end of a countersh-aft 20 mounted in the

brackets

21, 21 projecting from the sidewall of the casing 1. Disposed at an intermediate point of the shaft 20 is a worm 22 which is in mesh with the teeth of an oscillating sector or quadrant 23 secured to the outer projecting end of a transversely disposed rock-shaft 24, disposed along the inner bottom corner of the box 9. The rock-shaft 24 serves as a hinge pin for the damper 25 which extends across the casing 1 and is free to oscillate between the inner vertical wall of the box 9 and the partition 3, the said damper when in vertical position projecting somewhat above the box 9 (Fig. 4) to facilitate the mixing of the hot and cold air. The free edge of the damper 25 is provided at the center with a pair of ears or lugs 72, to which is pivotally coupled the adjacent end of a link 26, the opposite end of the link being pivotally secured to a correspondin pair of ears or lugs h at the free edge 0 a second damper 27 hinged in any suitable manner along the inside of therear wall of the casing 1 so that one damper moves with theother.

. Secured to, or formed integrally with the upper arm of the lever 12, and opening toward the lever, is a yoke 28, the arms of which have mounted thereon adjustable tappets or screws 29, 29 respectively, adapted to be alternately engaged or struck by the long arm of a bell-crank lever'30 pivoted at the bottom of a frame or mounting 31 secured to the casing 1 adjacent tothe outlet opening O, the bell-crank lever being controlled and actuated in one direction by a spring 32 having its ends secured to the long lever arm and frame respectively, the bottom of the frame being provided with a the thermostat) Isa-id nozzles slot t for the free play of the short arm of the bell crank, the free end of said arm permanently engaging (under the action of the spring '32) the lower end of the stem 33 of any convenitional thermostatic member 34 secured in the mounting 31, the air passing in contact with this thermostatic member just before it enters the room. The shaft 16 carries a wheel or air motor W which is practically in continuous motion, being actuated first in one direction and then the other by the air jets discharging alternately through the nozzles or

openings

10 and 10, (the valves being actuated by being disposed on opposite sides of the rotation axis of the air motor wheel to effect reverse rotations thereof as stated. The air accumulating in the box 9 escapes through a grating G in the front wall of the casing 1 which likewise forms the front wall of the box 9. The air in the room is heated to proper temperature by a steam or hot water radiator R, or other means, the vitiated air in the main escaping through they grating V of a foul air flue (not shown). The pipe P is coupled to an elbow P leading from an air-box B which is inserted under a raised window sash A for admitting outside air into the pipe and easing 1, the box B extending the full width of the sash so that no 'untempered outside air shall be allowed to enter the room. Preferably, the tempering apparatus is supported on a bracket 10 as shown in Fig. 1.

. The operation of the apparatus is as follows: Having determined on the maximum and minimum temperature of the air discharged into the room, and assuming them to be 75 and 65 degrees respectively, the tap pet 29 is so adjusted that at 65 degrees the thermostats (34) position has permitted the spring 32 to pull the long arm of the lever 30 in proper direction to cause the said arm to oscillate the shifting lever 12 to one side (to the left) of its neutral vertical position or dead center, the weight 15 throwing the lever to its position of rest as shown (Fig. 4). This final throw uncovers the nozzle 10 and covers the nozzle 10 with the valve or shutter 11 on the lower end of the shifting lever. The air jet which escapes through the open nozzle 10 impinges against the paddles of the air motor wheel W and causes it to revolve, thereby setting in motion the

dampers

25 and 27 through the gear connections 18, 19,20,422 and 23, and rock-shaft 24, as previously described. The direction in which the

dampers

25 and 27 are now moving (to the left Fig. 4), causes a gradual, progressive increase of the flow of heated air from heating chamber 5 into the mixing chamber 5', and at the same time a corresponding progressive decrease of the cold air,'resulting in a mixture of air at steadily increasing temperature, which after mixing contacts with the thermostat 34 and enters the room. The tappet 29' 15 next adjusted so that when the temperature of the mixed air has gradually risen to 75 degrees and caused the expansion of the thermostat to move the bell crank, it will move the shifting lever 12 back and past the dead center so that the weightwill cause it to drop to its opposite position of rest as shown by the dotted line as (Fig. 4). The nozzle 10 is now uncovered while nozzle 10 is closed, causing a reversal of the air motor and a reverse movement of the dampers, wh1ch progressively decreases the quantity of heated air flowing into the mixing chamber 5' and correspondingly increases the flow of cold air into said chamber, resulting in aflow of air with progressively decreasing temperatures which contacts with the thermostat and enters the room. When the temperature has fallen to 65 degrees the thermostat again permits the spring 32 to throw the shifting lever, and this oscillation of the temperature of the air continues. It is obvious that because the thermostat controls the reversal of the air motor it will maintain these limits of temperature whether the outside temperature rises or falls so that the temperature of the air which enters the room is both regulated and oscillated. The period of time consumed between the shifting of the lever 12 may be regulated by the flow of air permitted through the

nozzles

10, 10. A greater quantity will turn the air motor faster and a lesser quantity slower, the size of the nozzles being determined by trial. I

Having described my invention, I claim: 1. In a ventilating system, a tempering apparatus comprising a casing provided with air intake and discharge openings, hot air and cold air compartments for heating and tempering the air discharged from the casing, dampers for controlling the air discharged from the respective compartments, an air motor, valve-controlled jet nozzles leading from the hot air compartment for actuating the motor in either direction, intermediate gear connections between the motor and dampers aforesaid for actuating the dampers, and thermostatically controlled means for actuating the jet-controlling valves in proper direction to effect reversals of the motor and corresponding tempering of the air discharged from the casing.

2. Inaventilating system, atempering apparatus comprising a base provided with air intake and discharge openings, hot air and cold air compartments for heating and tempering the air discharged from the easing, dampers for controlling the air discharged from the respective compartments, a motor, valve controlled jet nozzles dis- .lever mounted in proximity posed on opposite sides of the rotation axis of the motor leading from the hot air compartment for actuating the motor in either direction, intermediate gear connections between the motor and dampers aforesaid for actuating the dameprs with a rotation of the motor, a vertically oscillating shifting to the motor, valves carried by the lever and operating across the jet openings aforesaid, the valves being so spaced that the closing of one jet openmg leaves the opposite opening uncovered, and a thermostatlcally controlled member for actuating the shifting lever first in one direction and then the other to eifect reversals in the rotation of the motor and a corresponding tempering of. the air discharged from the casing.

3. In a ventilating system, a tempering apparatus comprising acasing, hot and cold air compartments therefor, dampers for controlling the air from said compartments, a vertically rotating reversible air motor, jet nozzles leading from the hot air compartment and disposed on opposite sides of the rotation axis of the motor for actuating the latter in either direction, intermediate gearing between the fan and dampers aforesaid, a vertically oscillating weighted lever fulcrumed at an intermediate point opposite the motor, valves on the bottom leverarm of the lever operating across the passage-ways of the nozzles" and spaced to close one nozzle while the other nozzle is uncovered, a yoke secured to the upper lever arm, adjustable tappets on the yoke arms, a spring-controlled bell crank lever having one arm oscillating between the tappets of the yoke, and a thermostat for controlling the bell crank and causing oscillation thereof in one direction or the other depending on the temperature by which the thermostat is affected.

4. In a ventilating system, a tempering apparatus comprising a casing provided with air intake and discharge openings, hot air and cold air compartments for heating and tempering the air discharged from the casing, dampers for controlling the air from the respective compartments, a reversible air motor in the casing, means for directing jets of air from the hot air compartment against the motor to operate the same, valves for controlling said jets to cause the latter to impart rotation to the motor in either direction, thermostatically controlled means for actuating said valves, and intermediate gear connections on the outside of the casing interposed between the motor shaft and the dampers aforesaid.

5. In a ventilating apparatus, a casing provided with intake and discharge openings for the air, means for heating the air, means for tempering the heated air by a proper complement of cold air prior to its discharge into the room, a valve-controlled reversible air motor actuated by the currents from the casing, dampers for controlling the air determining the degree to which the heated air shall be tempered, thermostatically controlled means for actuating the valves controlling the air to the motor, and

intermediate gearing on the outside of the casing interposed between the air motor and the dampers aforesaid. 363

In testimony whereof I hereunto affix my signature.

HENRY BAETZ.