US872893A

US872893A - Electric damper-regulator.

Info

Publication number: US872893A
Application number: US34361406A
Authority: US
Inventors: John D Bowne
Original assignee: JOHN WALLACE SLAWSON
Current assignee: JOHN WALLACE SLAWSON
Priority date: 1906-11-15
Filing date: 1906-11-15
Publication date: 1907-12-03
Anticipated expiration: 1924-12-03

Description

J. D. BOWNE.

ELECTRIC DAMPER REGULATOR. APPLICATION IILED 11017.15, 1906.

2 SHEETS-SHEET 1.

% oentoz No. 872,893. PATENTED DEC. 3, 1907. J. D. BOWNE.

ELECTRIC DAMPER REGULATOR. APPLICATION I'll-12D NOV-.15, 1905.

2 SHEETS-SHEET 2.

Alklllllllll whim? W KO. Emmi/x 6240 mica 7 JOHN D. BOWNE, OF NEW YORK, N. Y., ASSIGNOR OF ONE-HALF TO JOHN WALLACE SLAWSON, OF NEW YORK, N. Y.

ELECTRIC DAMPER-REGULATOR.

Specification of Letters Patent.

Patented Dec. 3, 1907.

Application filed November 15.1906. Serial No. 343.614.

To all whom it may concern:

Be it known-that 1, JOHN D. BOWNE, a

citizen of the United States, residing'at New York, in the county of NewYork and State of New York, have invented certain new and useful Improvements in Electric Damper- Rcgulators, of which the following is a specification.

My invention relates to electric damper regulators, and belongs directly in that class of apparatus, each example ofv which includes an electric motor as the operating means, with a divided function, the office of the motor being in part to control the position and movement of the damper, and in. part to throw an electric switch affecting the motor current.

' The object of my invention is to produce damper-operating mechanism allied to the type mentioned, and designed particularly for use in'connec-tion with high pressure steam sources or systems, wherein a slowmoving electric pilot switch is adapted to -make and break the current from a relatively 25 inexpensive low-tension battery that energizes suitable magnets arranged to turn a nick-moving reversing switch included in t e normal street circuit by which the motor is served, such mechanism being, as an additional object of my invention, special in constructive form and arrangement.

To carry out the objects stated, parts are fashioned and associated as illustrated in the accompanying drawings, of which- Figure 1 represents a side view of all the elements assembled. Fig.2 is a top plan view of the low-tension switch. Fig. 3 is a top plan view of the high tension switch, and

- shows in diagrammatic form the arrangement of the switch, motor andelectrical conductors.

Like reference letters are used to designate like parts throughout the specification and drawings.

In the frame A of any suitable casing, is supported the main shaft'B in bearings b. The shaft is provided with a worm 1) near its inner end, and it is driven by the motor W.

The worm drives a reducing ear 0, and the pinion c on the same shaft with the gear C, still further reduces the speed by its engagement with arm gear DJ The movement of gear D, by means of the sprocket d on the same shaft, and chain (1 is transmitted to damper E through its sprocket e, all

of suitably relative sizes and positions for the purposes desired.

As stated, the motor is included in the street circuit, the conductors being designated b and there is likewise connected in sired resistance, when it is ne'edful to defend the motor against a street current of excessive strength. It will be noted that the cur rent is thrown upon the motor oftentimes when the armature is at rest. A certain advantage follows from the introduction of the lamp, which is that when the light is seen to glow with regular brilliancy and at customary intervals it is indicative of the proper working of the apparatus.

In Fig. 3 it is shown that the main terminals of the motor are each connected to two mercury cups, and that the two cups thus connected with each terminal lie on opposite sides and beneath different" ends of the rocking, reversing switch F. Thus, cups G and K are connected with one motor terminal, and on s J and H with the other, the cups G and J eing under one extremity of switch F, and cups Hand K being situated under the other end of that switch. The ends of the switch are formed of blocks of insulation f and f, and the fingers g and j are secured to block f and are plunged into cups G and J. At the other end of the switch the fingers h and k are secured to block f and plunge into cups H and K when the switch rocks. In Fig. 3 it is also illustrated that each of the street circuit conductors b is connected to two of thefingers, one at each end of'the switch F. That is to say, for example, the positive wire from the street is connected with-fingers g and h, and the negative wire with fingers j and 7c. By reason of the particular arrangement of conductors and switch and motor terminals, it is believed to the motor circuit the lamp b, or other debe now discernible that as the ends of switch F are alternately lowered thestreet current is sent through motor b in opposite directions, in other words, the motor is first opthe flattened and bent tub'e R, having one end rigidly connected with the hollow support 1" and open to boiler steam entering through pipe r. The other end of the tube is free to move and is closed. It is limited in its movement by the adjustable thumbscrews 1' and it. is coupled pivotally by means of the rod r with the crank g attached to, switch Q at its 1pivotal point and adapted to rock the switc asthe pressure, rising or falling in tube R, tends to straighten or permit it, to curve in the usual manner. As the switch Q rocks, the forks gand g are dipped alternately into pairs of mercury cups, one pair of cups; being supported at each end 0 the rocking beam S t at 1s pivoted at the middle as shown. The pairs of .cups on the ends of the beam aremarked 8, and 8. Beam S is rocked by means of its crank 8 which is pivotally connected by rod d with the wrist d eccentrically carried b the hub or center of gear 1).

The mode of operation of this invention is the following: At normal steam pressure the curved tube R holds switch Q approximately 1 level and no connections are made. An ex cess of steam pressure rocks switchQ and dips fork g into the cups .9, closing the local circuit and energizingmagnet 'L. Fi ers g and j at once plunge into cups G and and the motor starts, resulting in the relatively 40 slow turning of gear D in the direction of the arrow, and in a closing movement of damper E. Rod d is drawn to the left and by crank s? rocks downwardly the end of beam S which carries the cup's's. If this movement continues, the local circuit will obviously be broken and the motor stopped, unless the steam as constantly increases in pressure and Y rocks 1 low-tenslon switch correspondlngly.

, When, however, the tube reaches its limiting 5O thumbscrew, the lowering of cups 8 just exlained necessarily breaks the circuit. Such 1s an extreme instance, however, because the dam er E has been concurrently closed and the raft stop ed. The breaking of the local circuit ha ts the motor and leaves the remaining parts as they may be, but the fall of ressure soon curves the tube B and di s ork q into cuipts s thus energizing magnet and plunging gers h and 7c mto cups H and K, when, as explained, the motor again starts but in reverse direction and the contrary movement of the parts opens the damper. The movement proceeds until the renewed pressure or the rocking of beam S breaks the 6 5 ocall circuit. 1 It is thought to be now clear and no sparking occurs because the make and break of the street current is quickly effected.

As intimated above, the opening and closing movements of the damper are gradual and occur upon relatively small variations of temperature. v

Havin now described my invention and explaine the mode of its operation, what I claim is- 1.- In a damper regulator, the combination with the damper, of electro-magnetic mechanism adapted to operate the damper, a switch device comprising a pivoted switch, pressure-actuated means arranged to move the said switch, pivotally supported switch contacts, and connections whereby the said mechanism moves the said switch contacts, a. second switch, and electrical switch-opcrating means arranged to act upon the said second switch, the said switch-operating means being in circuit with and controlled by the'said switch device, and the said second switch being arranged to make and break the circuit of the said electro-1nag-' netic mechanism.

2. In a damper regulator, the combination with the damper, of a reversible electric motor and mechanism adapted to operate the said damper, a reversing switch device comprising a pivoted switch, pressure-actuated means adapted to move the said switch in .two opposite directions, pivotally supported switch contacts, and connections whereby the said damper-operating mechanism moves the said switch. contacts, a second reversing switch, and electrical switch-operating means arranged to act upon the said second switch, the said switch-operating means being in circuit with and controlled by the said switch device, and the said second switch being arranged to make and break and reverse the circuit of the said electric motor.

3. In a damper regulator, the combination with the damper, of electro-magnetic mechanism adapted to operate the damper, a switch device comprising a pivoted switch, a pressure-actuated curved tube arranged to move the said switch, pivotally supported switch contacts, and, connections whereb the said mechanism moves the said switch contacts, a second switch, and electrical switch operating means arranged to act upon the said second switch, the said switch-oper- 4, In a damper regulator, the combination wit h the damper, of a reversible electric motor and mechanism adapted to operate the said damper, a reversing switch device comprising a pivoted switch, a pressure-actuated curved tube adapted to move the said switch in two opposite directions, pivotally suported switch contacts, and connections whereby the said damper-operating mechanism moves-the said switch contacts, a second reversing switch, and electrical switch-operating means a ranged to act upon the said second switch, the said switchoperating means being in circuit with and controlled hthe said switch device, and the said second switch being arranged to make and break and reverse the circuit of the said electric motor. i

."1. In a damper rcgulator, the combination with the damper, of electro-magnetic mechanism adapted to operate the damper, a switch device including a switch, expansible means constructed and arranged to move the said switch, pivota-lly supported switch contacts, and connections whereby the said mechanism moves the said switch contacts, a second switch, and electrical switch-operating means arranged to act upon the. said econd switch, the said switch operating means being in circuit with and controlled by the said switch device, and the said second switch being arranged to control the circuit of the said electro-magnetic mechanism.

6. In a damper regulator, the combination with the damper, of electro-magnetic mechanism adapted to operate the damper, a switch device including a switch, expansible means constructed and arranged to move the said switch, pivotally supported switch con t acts, and. connections whereby the said mechanism moves the said switchcontacts in the same direction in which the said switch is moved, a second switch, and electrical switch-operating means arranged to act upon the said second switch, the said switch-operating means being in circuit with and controlled by the said switch device, and the said second switch being arranged to control the circuit of the said electro-magnetic mechanism.

In testimony whereof I allix my signature in presence of two witnesses.

JOHN I). BOWNE.

Witnesses:

R. B. IIoPKINs, ANNA ScnMmmwUNn.