Abstract: A dust proof electric switch is provided for use in a dynamoelectric machine employing a centrifugal acuator having a terminal board with a cup formed therein in which a fixed contact point and terminal are mounted. A pivotable switch arm having a contact point attached thereto is mounted to the arm and extends above and cantilevered across the terminal board so that pressure on the switch arm from the centrifugal acuator causes the contact points to touch thereby closing the circuit. An open ended, resilient, flexible boot is affixed to the cup and extends upward between the terminal board to snuggly abut the switch arm and completely enclose the contact points when they are touching and when they are apart thereby protecting the contact area from dust and debris as well as containing sparks within the boot. The terminal board contains stops which serve to maintain alignment of the switch arm.

Abstract: A dynamoelectric machine (M) has a terminal board (T) on which electrical connections are made by attaching various electrical elements (1, 5) together so, that an electrical connection is made between them. A fastener 13 is used to physically make the attachment. A spacer (25) fits on and is compressed about the fastener to permanently attach the elements and insure that electrical integrity between them is maintained. The elements cannot be subsequently loosened by connection and disconnection of other elements to the board, or by an element rotating relative to the fastener.

Abstract: A dynamoelectric machine (10) has no external leads. A stator assembly (12) includes at least one set (14) of electrical windings (16) terminable at each end. A rotor assembly (18) includes a rotatable shaft (22) and the stator and rotor assemblies are installed in a housing (24). A terminal block (38) is internal of the housing and the ends of the winding set are terminated in this block. The housing has an opening (114) therein through which the termination unit is accessible. A receptacle (102) to which external electrical wires (W1, W2) are connected is matingly connectable to the material block through the opening to connect the machine to the external electrical wires.

Abstract: A switch assembly for selectively engaging and disengaging contacts connected to electrical machinery such as the windings for an electric motor including a pair of conductive members having insulated base portions and flexible cantilevered portions extending outwardly therefrom, each carrying one of a pair of spaced opposed electrical contacts, with one cantilevered portion of the conductive members being shorter and stiffer than the other to enhance rolling wipe-action of the pair of contacts when engaged.

Abstract: A switch assembly for use with a centrifugal actuator in the start winding circuit of a dynamoelectric machine (1). The switch has a pair of electrical contacts (29, 33) contained in a pliable, bellows-like enclosure (37) for protection from foreign matter. The assembly includes a terminal board (19) having an electrically conductive post (28) mounted thereon and comprising one side of the switch. A second contact, comprising the other side of the switch, is directly above the first and is surrounded by an electrically conductive cap (32). The cap is affixed between the ends of an electrically conductive, cantilevered switch arm (16) which is biased against a vertically rigid, horizontally adjustable stop (45). The stop has one end rigidly mounted to the terminal board and its other end above and in contact with the switch arm where the cap is affixed to the arm. The bias is caused by the switch arm support structure at the fixed end being attached to the terminal board at an angle.

Abstract: A switch assembly integrally formed with a terminal connection board for selectively engaging and disengaging contacts connected to electrical machinery such as the windings for a dynamoelectric machine, the switch assembly including opposed contacts shaped and movable relative each other to provide rolling wipe-action contact wear, one of the contacts being mounted on a flat conductive member having an arm portion extending laterally to one side thereof which is engaged by and is actuable by a switch arm mounted on the terminal board.

Abstract: A compartmentized lead wire terminal housing of electrical insulative material is provided for installation in the shell of a dynamoelectric machine (e.g., a fractional horsepower motor) in which male terminals connected to the windings of the motor are securely installed within separate compartments of the housing so as to enable female connectors on lead wire to be readily connected to the male winding terminals. The housing further has a lid which may be closed and locked in place thereby to enclose and protect the terminals.

Abstract: A system for filtering liquids, such as coolant liquid from process machinery. The system includes an improved liquid storage tank having a partition dividing the tank into a clean tank for receiving clean liquid from a filter for return to the process machinery, and a dirty tank for receiving process or dirty liquid from process machinery. The storage tank further includes a second partition forming a blowdown chamber and a recirculation chamber below the blowdown chamber, the two chambers being coupled together by a valve which can be opened and closed depending upon the cycle of operation of the system. The recirculation chamber is coupled by a filter pump to the inlet of the filter. The filter has a return line to the clean tank and a blowdown line to the blowdown chamber. The blowdown chamber has a conical bottom and the recirculation chamber has a sidewall provided with tangential inlet ports communicating with the dirty tank.

Abstract: An improved filter plate of the type used with a vertical stack of other such plates to form an industrial filter of the type known as a horizontal plate filter. The improved filter plate has a generally upright side wall, and a divider plate or transverse planar plate portion secured to the side wall below the upper margin thereof. An open top trough is formed in the divider plate to receive the filtrate passing through a filter medium above the filter plate when the latter forms a part of a horizontal plate filter. A hole in the side wall permits the filtrate to be removed from the trough. The filter plate further includes a fluid inlet conduit and an air vent/blowdown conduit extending through the side wall into the space below the divider plate. The trough and removable conduits eliminate the need for fixed baffles for use as the fluid inlet, outlet, and blowdown means as found in a conventional filter plate.

Abstract: A low actuating force switch having one or more resilient switch arms cantilevered within a switch housing and further having an operating member or plunger movable within the housing for flexing the switch arm(s) and for making or breaking one or more circuits. A spring is interposed between the operating member and one of the switch arms for applying a force to this switch arm which in turn flexes the latter. In instances in which the switch arm is normally in an unflexed, open position and in which the operating member continues to move in the direction for closing the contacts after the contacts have closed, the spring takes up or absorbs a substantial portion of the additional movement of the operating member without exerting undue stress on the switch arm. In instances in which the switch contacts are normally closed, the operating member may engage the switch arm distal from its cantilevered connection to the switch housing so as to lessen the force required to open the contacts.

Abstract: Disclosed is an improved liquid filter in which contaminated liquid is pumped into an inlet chamber, through a filter element, into an outlet chamber and out of the filter through an outlet pipe. The inlet and outlet chambers have compartments which hold compressed air. When the filter element becomes clogged with contaminants, inlet and outlet valves are closed, sealing off the filter. A vent valve is then opened to quickly exhaust the compressed air in the inlet air compartment. This allows the compressed air in the outlet air compartment to energetically force liquid back through the filter element thereby dislodging the deposited contaminants. The compartments and a liquid column between them are sized so that a discharge of liquid from the inlet compartment during the venting thereof is prevented.

Abstract: A motor starting switch particularly intended for use with a two speed electric motor actuable by a centrifugal actuator upon start up of the motor so as to energize the high speed and auxiliary windings of the motor for start up of the motor and for deenergizing the auxiliary winding and energizing the selected high or low speed winding of the motor after the motor has accelerated to a predetermined operating speed. The switch has a resilient, current carrying, force transmitting member interconnecting the plunger of the switch operated by the centrifugal actuator and a switch arm for energization of the auxiliary winding and for effecting movement of the switch arm within the switch.

Abstract: A centrifugal actuator assembly for an electric motor or the like is provided having a pair of opposed movable members rotatable with the rotor shaft of the motor and responsive to centrifugal force upon rotation of the rotor shaft for movement between a run and a start position. The movable members are biased inwardly toward their start position by means of compression coil springs interconnected between the movable members by means of a linkage designed to improve operating life of the centrifugal actuator.

Abstract: A liquid filter apparatus wherein an elongated sheet of filter media is movable along an inclined support at the bottom of a receiving tank for dirty liquid below which is a collection tank for filtered liquid. The periphery of the collection tank is sealed by clean liquid supplied from an auxillary reservoir at a pressure greater than the liquid in the receiving tank. A suction pump attached to the outlet from the collection tank helps to maintain flow of clean liquid through the media while filtered out material is accumulated on its upper surface. Fresh filter media is pulled into position from a supply roll to replace loaded filter media by drive means controlled to operate automatically after the pressure in the collection tank is substantially equalized temporarily with that in the receiving tank.

Abstract: A filter apparatus wherein filter media is submerged in liquid being filtered and suction is employed under the media to increase the flow through it. The filter media in elongated strip form is supported for movement in one direction on an inclined endless pervious conveyor comprised of rigid plate members fixed to a pair of drive chains. A receiving tank for dirty liquid is above the conveyor and media with a lower tank for clean liquid below the conveyor with the sides and ends of the lower tank being constantly sealed in order to maintain reduced pressure therein to enhance flow through the media. Filtered liquid at a somewhat higher pressure is supplied at the sides of the conveyor and at end walls of the receiving tank to prevent any migration of dirty liquid into the lower tank at the periphery of the lower tank.

Abstract: A filter apparatus wherein filter media is submerged in liquid being filtered and suction is employed under the media to increase the flow through it. The filter media in elongated strip form is supported on an incline for movement in one direction by an endless pervious conveyor. A receiving tank for dirty liquid is above the conveyor and media with a lower tank for clean liquid below the conveyor with the sides and ends of the lower tank being constantly sealed in order to maintain reduced pressure therein to enhance flow through the media. Filtered liquid is supplied at the sides of the conveyor and at an end wall of the receiving tank to prevent any migration of dirty liquid into the lower tank at the periphery of the lower tank. Advancement of the filter media is controlled automatically in response to variations in the pressure differential on opposite sides of the media which varies in proportion to the dirt load of the media.

Abstract: A dynamoelectric machine, for example, an electric motor, having an enclosure which includes a cylindrical shell and end shields on each end of the shell, the enclosure and end shield combination delimiting a chamber containing a stator assembly and a rotor assembly including a shaft rotatably supported along the end shields, and a terminal board mounted within the chamber adapted to permit the electrical interconnection of the dynamoelectric machine to a source of electrical energy along external leads inserted through an opening in the enclosure is provided with guide means for directing the external leads to the proper location, generally an outboard endshield facing side of the terminal board for connecting the external leads to the motor. Because of the guidance provided, the external leads do not foul on other structural elements of the motor and may be connected easily by field or original equipment manufacturing personnel at some point in time after motor manufacture.

Abstract: A starting switch assembly is integrally formed with a terminal connection board and is adapted to be actuated by a conventional centrifugal actuator. The switch assembly is constructed so that the electrical contact points of the assembly abut one another under a predetermined pressure independent of the forces exerted on other structural components of the assembly. In the preferred embodiment, the terminal connection board is used to connect external power leads to the dynamoelectric machine. The switch assembly includes a terminal block integrally formed with the terminal connection board. Various windings of the dynamoelectric machine are connected to the power leads by switch assembly operation. The assembly includes a switch arm which is mounted for movement between at least first and second positions. The switch arm is designed to engage and disengage respective ones of a plurality of electrical contacts as the switch arm moves between positions.