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June 2-8, 1938. F. l. WILLIAMS 2,122,017 CONTROL APPARATUS Filed March 19, 1931 2 Sheets-Sheet l Jill/671207’ 2722i f?/Zlliams Z @@W Ww J . Zia altar/rays June F_ I‘ WILLIAMS‘ 2,122,017 CONTROL APPARATU S‘ Filed March 19, 1931 2 Sheets-Sheet 2 71419 @702 vzeys - 2,122,017 Patented June 28, 1938 UNITED STATES PATENT OFFICE 2,122,017 CONTROL APPARATUS Frank I. Williams, Hyde Park, Mass, assignor to American Tool and Machine Company, Hyde Park, Mass, a corporation of Massachusetts Application March 19, 1931, Serial No. 523,765 10 Claims. (Cl. 200-35) This invention pertains to control apparatus and relates more especially to apparatus of the type in which a clock mechanism controls the operation of two or more electrical switches, the 5 principal object of the invention being to pro vide apparatus of this general type which is of simple and practical construction and which comprises a single manually movable part which is effective to predetermine the respective times 10 at which such switches shall be actuated. One suggested utility for such control apparatus is in the automatic control of a centrifugal ex tractor. Other and further objects, advantages and 15 utilities of the invention will be made manifest in the following more detailed description and by reference to the accompanying drawings in which: Fig. 1 is a front elevation to small scale of a 20 timer mechanism embodying certain features of the invention; Fig. la is a fragmentary front elevation to larger scale showing certain details of the timer mechanism; m in Fig. 2 is a rear elevation of the timer mecha nism of Fig. 1 but to larger scale and with the back member removed; Fig. 3 is a vertical section on the line 3-—3 of Fig. 2; 30 Fig. 4 is a diagram illustrating one desirable arrangement of electrical connections embodied in the control apparatus; and Figs. 5, 6, 7 and 8 are diagrammatic views illustrating the relation between the indicating devices of the timing mechanism and the switches controlled thereby. Referring to the drawings, the numeral l designates the casing of the timing mechanism, said casing being supported upon a base 2 and 40 having the front wall 3 (Fig. 3) and the remov able rear wall 4. The front wall is provided with . a glazed opening 5 which receives the dial 6, suitably graduated, for example, to indicate minutes, and having an opening at its center 45 through which projects the staff or spindle ‘I. A knob or handle 8 is secured to the forward end of this staff and provides means whereby the staff may be turned manually, the staff con stituting means for winding the spring of the clock mechanism of the timer, thereby to start its operation, and also actuating certain switch contacts as hereafter described. The staff also carries a sleeve 9 (Fig. 1a) which is connected at its rear end to certain parts of the timing mech— 55 anism and which may be turned independently of the staff. In front of the ‘dial are mounted the indicator levers l0 and H upon the staff 1 and the sleeve 9, respectively, having the index pointers I091 and Ila. The index lever I0 is hereafter referred to as the main indicator or lever, and the lever II as the auxiliary indicator or lever. The auxiliary lever II is provided with a segmental member I2 (Fig. 1*‘) which under lies the end of the lever Ill, and this segment II is provided at its opposite ends with forwardly projecting ears l3 and 14 preferably furnished with screw threaded openings for reception of the adjustable abutment elements l5 and [6 re spectively. These ears l3 and I4 and/or the stop elements 15 and iii, if the latter are em 15 ployed, constitute abutments for limiting the relative movement of the levers l0 and H. The clock mechanism of the timer is contained in a case I‘! (Fig. 2) secured to the back of the wall 3 of the casing, and this clock mechanism should be of any suitable type comprising for example a spring or other power storing device which is energized by turning the staff 7, such clock mechanism comprising usual escapement mechanism or governing means which determines -. the rate at which it shall run, it being under stood that when the staff 7 is turned, for example to the right, the spring is thereby energized, and when the handle 8 is released the spring im mediately starts to return the staff ‘I and the 30 sleeve to their initial positions at a predeter mined speed. Since such clock mechanisms are well known in the art as illustrated for example in Patents Nos. 1,395,098, 1,493,771, and 1,705,458, it is unnecessary to describe the mechanism of 35 this timer in further detail. Preferably within the casing l, I provide a signal bell l8 and also two signal elements such as electric lamps I9 and 20 disposed behind open ings 2| and 22 in the front wall 3 of the casing. 40 Such openings are preferably provided with colored bull’s-eyes 23 and 24 respectively, one of said bull’s-eyes being red for example, and the other of some other color, for example green. or if preferred, uncolored so as to transmit white 45 light. The casing l is preferably furnished with a socket 25 for the reception of the end of a con ductor cable 26 and with a second socket 27 adapted to receive a plug in the end of a cord 29 having a plug 28 which may be plugged into a 50 suitable socket to provide electric current for actuating the lamps I9 and 20, the signal bell I8, and a solenoid 45 hereafter described. The operation of the apparatus is substantially as follows, it being assumed that the indicator 55 2 2,122,017 levers l0 and II are substantially in the position indicated in Fig. 5. The operator grasps the handle or knob 8 of the timer device and turns it to the right, as viewed in Figs. 1 and 5. Since in the initial position an abutment member M (or IE) is spaced from the main indicator lever in, the pointer [0a is permitted to move to the right of the pointer lla before it engages the dicators from advanced position back to initial position, interconnected electric circuits includ ing a plurality of switches, and connections be‘ tween said switches and indicators constructed and arranged to operate the switches successively U! during the advance movement of the indicators and during the return movement again to operate the switches successively in reverse direction. 2. Control apparatus of the class described comprising a main indicator manually movable from an initial position to an advanced position, abutment M the indicator lever i I is then pushed‘ ' a second indicator having a portion movable forwardly with the indicator lever Ill and as the along substantially the same path of travel as 15 pointer l Ia passes the zero of the scale the switch the main indicator, spaced abutments on the main indicator disposed on opposite sides of said 15 51 is closed, preferably momentarily. As the in dicator lever II is moved as described the switch portion of the second indicator and operative to 58 is also closed, thus closing a signal circuit limit the movements of the second indicator in beginning at the plug 28 and including the switch both directions relative to the main indicator, drive means for moving one of the indicators 58, the white (or green) signal lamp 20 and lead ing back to the plug 28. The white signal lamp from advanced position back to initial position, a 20 is thus caused to burn. The switch 56 has al~ plurality of electric switches, and connections be~ ready been opened as described and the signal [9 tween said switches and indicators constructed and arranged to operate the switches during ad and the bell l8 remain inactive. 25 vance movement of said indicators and reversely The operator may now move the handle as much farther to the right as is necessary to set operate said switches during return movement the index pointers Illa and HL1 to the desired of said indicators. 3. Control apparatus of the class described period of operation. If it be desired to have the stop signals l8 and l 9 operate for a certain period, comprising a main indicator manually movable 30 the handle is now turned to the left to carry the from an initial position to an advanced position, a second indicator having a portion movable 30 pointer l0a to the left of pointer I la, such move along substantially the same path of travel as ment being limited for convenience by the abut the main indicator, spaced abutments on the ment l3. The apparatus now continues to op erate the indicators l0 and II slowly moving back main indicator disposed on opposite sides of said portion of the second indicator and operative to toward initial position. At the end of the pre determined period the index ID" will have re— limit the movements of the second indicator in I turned to zero and at substantially this time the both directions relative to the main indicator, switch 55 is opened. (It is to be noted that the automatic means for returning both of said in switch 57 is at this time open having been closed dicators back to initial position, a pair of electric 40 only momentarily). At substantially the same switches, and connections between said switches time the switch 55 is opened the switch 56 is and indicators constructed and arranged to close closed. As the indicator lever I0 reaches the said switches successively during advance move ment of said indicators and to open said switches zero point before the indicator lever H has re turned to its initial position (providing the parts successively during return movement of said in dicators. have been set as above described), the latter con 4. Control apparatus of the class described tinues to move. As the index lla nears the zero position the switch 51 is momentarily closed but comprising’ a pair of indicators manually movable without effect since the circuit has been broken from initial position to an advanced position, one at the switch 55 and as the index I la reaches the of said indicators having spaced abutments dis posed on opposite sides of the other of said in 50 zero position the switch 53 is opened, breaking the dicators operative to limit the movements of the circuit through all of the signals. Thus by vary ing the distance between the abutments l5 and latter in both directions relative to the former, I6 the period that the stop signals will operate drive means for returning said indicators from may be varied, it being noted that these signals an advanced position back to initial position, a 55 automatically stop after a predetermined time so plurality of double acting electric switches, and connections between said switches and indicators that waste of current is avoided. constructed and arranged to operate said switches While I have herein disclosed a desirable em bodiment of the invention, it is to be understood successively in one direction during advance that various changes in detail of construction movement of said indicators and to operate said 60 and speci?c arrangement of parts and the sub switches successively in reverse direction during stitution of equivalents may be made without de» return movement of said indicators. 5. Control apparatus of the class described parting from the spirit of the invention, and while the control apparatus as here shown is of comprising a main indicator, a second indicator, the main indicator having spaced lugs disposed utility in connection with the centrifugal ex tractor it is not necessarily limited to such use. on opposite sides of the second indicator operative I claim: to limit the movement of said indicators in both 1. Control apparatus of the class described directions relative to each other to a predeter comprising a pair of indicators manually movable mined range, a handle for manually moving one from initial position to an advanced position, one of the indicators in either direction thereby to 70 of said indicators having spaced abutments on move the other indicator to a selected set posi opposite sides of the other indicator and disposed tion after a predetermined movement of the first 70 in the path of movement of the other of said indicator, the latter thereafter being movable indicators and operative to limit its movements relative to the other indicator within a predeter in both directions relative to the ?rst indicator, mined range in the reverse direction, an electric switch control member actuable in response to 75. means for automatically moving one of said in movement of each indicator, and means for mov 75 abutment of the lever H. As the pointer l0a passes the zero point of the scale the switch 55'is opened, and at the same time controlling switch 55 is closed. When the indicator l0 strikes the 3 2,122,017 ing said indicators back to their initial position at a predetermined rate of speed. 6. Control apparatus of the class described bers disposed on opposite sides of the auxiliary indicator, one of said abutment members being engageable with said auxiliary indicator after the comprising a main indicator, a second indicator, the main indicator having spaced lugs disposed on opposite sides of the second indicator oper ative to limit the movement of said indicators in both directions relative to each other to a predetermined range, a handle for manually mov 10 ing one of the indicators in either direction there by to move the other indicator to a selected set position after a predetermined movement of the ?rst indicator, the latter thereafter being mov able relative to the other indicator within a pre 15 determined range in the reverse direction, means for moving said indicators back to their initial position at a predetermined rate of speed, inter connected electric circuits including a pair of switches, and connections between said switches and indicators operative successively to close cer tain of said switches during advance movement of said indicators and during reverse movement to open the ?rst closed switch after a predetermined period of time and then the last closed switch 25 at a predetermined later time. 7. Control apparatus of the class described comprising a main indicator, a second indicator, the main indicator having spaced lugs disposed on opposite sides of the second indicator operative to 30 limit the movement of said indicators in both directions relative to each other to a predeter mined range, a handle for manually moving one of the indicators in either direction thereby to move the other indicator to a selected set posi— 35 tion after a predetermined movement of the ?rst indicator, the latter thereafter being movable relative to the other indicator within a predeter mined range in the reverse direction, means for moving said indicators back to their initial po 40 sitions at a predetermined rate of speed, inter connected electric circuits including a plurality of switches, and connections between said switches and indicators constructed and arranged to close certain of said switches and open others 45 during advance movement of said indicators and during reverse movement to open the closed switches and close the open switches, thereby to produce coordinated effects in said circuits. 8. Control apparatus comprising a main indi cator manually movable from an initial position 50 to an advanced position, an auxiliary indicator, the main indicator having spaced abutment mem main indicator has been advanced a predeter mined distance from its initial position, thereby to advance said auxiliary indicator in response to further advance movement of said main indi cator, the other of said abutment members being engageable with said auxiliary indicator after the main indicator has returned a predetermined dis tance from its advanced position, thereby to re turn said auxiliary indicator in response to fur 10 ther return movement of said main indicator, means for automatically moving said main indi cator back to initial position at a predetermined rate of speed, and electrical switches having parts constructed and arranged to operate the switches successively during the advance movement of each indicator and which again operate the switches in succession during the return movement of said indicators. 9. Controlling apparatus comprising switches, a clock mechanism, a main indicator for deter mining the time of operation of one switch, an auxiliary indicator for determining the time of operation of another switch, the main indicator being movable to either side of the auxiliary in dicator, lugs projecting from the auxiliary indi cator into the path of the main indicator for limiting relative movement of the indicators, the 30 movement of the main indicator in a predeter mined direction starting the clock mechanism into action, setting the clock mechanism for a pre determined period of operation and closing a switch, said movement also moving the auxiliary indicator thereby to close another switch, the clock mechanism being constructed and arranged upon release of the main indicator to begin a slow return movement of both indicators toward nor mal position. 40 10. Control apparatus of the class described, comprising a plurality of electrical switches, an actuating element for each switch, a single con trol member for moving said actuating elements in a given direction for ?rst operating one of said 45 switches and then another, and automatic means for moving said actuating elements in the reverse direction whereby to operate the ?rst actuated switch after a predetermined period of time and to operate the last actuated switch at a prede 50 termined later time. FRANK I. WILLIAMS.