Abstract: There is disclosed an assembly comprising a workpiece panel having an opening, a cover plate for the opening and blind securement means including resiliently interengageable elements on the panel and the cover plate constructed for enabling the cover plate to be assembled from the outside of the panel and to permit initial insertion through the opening without substantial interference between the interengageable elements.

Abstract: A metered dose inhaler is provided for inhalation of asthmatic medication. An upright cylindrical air chamber has structure at the top for receiving a pressurized canister of asthmatic medication and for conducting metered doses thereof into the air chamber. A one way valve is provided at the bottom of the air chamber to admit air but to preclude escape of mist. A mouthpipe is provided at the top of the chamber on one side thereof for insertion in a patient's mouth. A deflectable diaphragm is provided in cooperation with the mouthpipe so that when a patient inhales the diaphragm deflects to permit the mist in the air chamber to be inhaled, air entering the one way valve of the bottom of the air chamber to supplant the mist. When the patient exhales the diaphragm closes, and the exhaled air is bypassed to the outside.

Abstract: A novel method for preparing a ground-meat sample for compositional analysis and an apparatus for performing the method are disclosed. The method comprises a series of steps. The first step includes obtaining a predetermined quantity of ground meat. Next, the meat is formed into a layer having a predetermined thickness. Then, a first portion of the layer is isolated from the remainder. The isolated first portion is then urged into an elongated, hollow member having an axis, an open end, and a resistive end movable along the axis relative to the open end. The isolated first portion and the resistive end are then urged together so as to produce a substantially air void-free isolate out of the first portion.

Abstract: A road resurfacing or repaving machine is disclosed. The machine is self-propelled, and has a chassis. A preliminary heater depends from the machine chassis to provide preliminary heat to the underlying road. A preliminary scarifier breaks up the top of the heated road surface. A main heater behind the preliminary scarifier provides a second heating action, and a main scarifier behind the main heater further scarifies the hot road material and the road surface. Spray means sprays liquid asphalt cutback over the hot, scarified material. A first macadam dispensing device behind the spray means dispenses new hot mix material to the hot, sprayed material and road surface to make up solid material lost through pot hole formation or other road deterioration. A first mixer commingles the newly added hot mix with the old, sprayed, scarified material on the road surface. A first screed levels and at least partly compacts this material to form a first lift.

Abstract: A metal working apparatus comprises a fixed frame and first and second metal working tools operatively mounted to the frame. A tool mounting structure is movable alternatively in one of a first direction for operating the first tool and a second direction for operating the second tool. A bi-directional drive means is carried upon the frame for driving the mounting structure in the first and second direction.Operator accessible first and second controls are provided for respectively controlling the direction of operation of the drive means so as to drive the mounting structure respectively in the first and second directions. The controls are preferably located respectively at first and second work stations on opposite sides of the fixed frame.

Abstract: A novel flow divider-combiner valve unit is disclosed. A valve body includes fluid passageway means for controlling fluid flow through the divider-combiner valve unit. The fluid passageway means comprises: a cavity, first, second and third passageways; first and second pressure-responsive elements; and biasing elements for retaining the pressure-responsive elements substantially in open positions until a predetermined substantial pressure differential exists in the divider-combiner valve unit. The biasing elements also enable the pressure-responsive elements to move substantially independently of each other toward closed positions when a first pressure differential in the divider-combiner valve unit exceeds the predetermined pressure differential. The biasing elements additionally cause the pressure-responsive elements to move substantially in unison when a second pressure differential in the divider-combiner valve unit exceeds the predetermined pressure differential.

Abstract: A method and apparatus for separating, spreading and distributing a solid or liquid particulate material. The particulate material is pneumatically conveyed into a centrifugal chamber within a rotor (20) operatable by the flow of material for centrifugal separation of the particulate material. The terminal edge of the circumference of the centrifugal chamber serves as an overflow for establishing a buffer store and has a flow-retarding inwardly directed flange. A baffle may be provided around the terminal edge to intercept the material flung out and to conduct the material, via hopper-like flow-retarding recesses, to different outlets provided around the terminal edge.

Abstract: A feeding system for delivering feed to troughs associated with rows of animal confinement cages is disclosed. The system comprises mobile hopper means for carrying a load of feed past troughs associated with each row of animal confinement cages. Delivery means extend from the hoppers; these delivery systems each receive feed from the hopper and deposit the feed in the feed troughs. The delivery sub-systems include a tube extending from a hopper and hopper conveyor toward a distal tube end at the trough. A shoe is attached to the tube at the distal end so as to support that tube distal end at the location spaced above the trough bottom. A grader blade is pivotally attached to the shoe in such a position as to be located behind the tube when the shoe and tube are moving in a forward direction along the trough.

Abstract: A monitoring circuit is provided for a metal detector which includes a metal sensor for producing a sensor signal in response to the passage of a metallic object through a rotating apparatus and a tachometer for producing a tachometer signal at a frequency proportional to the rate of rotation of the rotating apparatus. In accordance with the invention, the monitoring circuit comprises an adjustable tracking filter responsive to a predetermined control signal for tracking the frequency of the sensor signal in a predetermined fashion and a control circuit responsive to the tachometer signal for producing the control signal.

Abstract: A tool-changing device for a machine tool comprises a tool selector which is movable over a tool storage matrix to select tools from fixed storage locations and transfer them to an exchange position in readiness for mounting on a work head of the machine tool. The work head is movable inter alia along a Z machining axis, and the exchange position is disposed on a pick-up axis parallel to the Z axis at a level which varies in accordance with the position of the work head.

Abstract: The derailleur comprises, between the conventional articulation mechanism which allows the lateral displacement of the chain guide device (12), an additional articulation mechanism (10, 11) whereby the chain guide device (12) can effect a displacement which is substantially free and of large extent in a plane perpendicular to the axis (X--X) of the crank-gear. This very substantially improves the conditions under which the chain is shifted from one chain wheel to another.

Abstract: A novel poultry watering device, and a combined watering and feeding system are disclosed. In a first embodiment, the water device or station includes a support tube, at least one water-holding cup disposed for access by poultry, and water conduit means carried by the support tube and extending from a water line to the water-holding cup. In a second embodiment, the water conduit means is suspended from a pivoting clamp arrangement beneath a feed conveyor. The system includes a plurality of discrete feeder pan units connected to the feed conveyor and disposed to present feed to the poultry. The water line can conveniently be located generally adjacent the feed conveyor. A number of water dispensing stations of the type described are also provided. These water dispensing stations have their support tubes or clamps carried by the feeder conveyor. In this way, the water dispensing stations and feed pan units are all disposed at the same level.

Abstract: An improvement in apparatus for applying a coating to a surface of a moving workpiece including a coating dispenser having at least one coating outlet for dispensing a stream of coating. A dispenser control unit is operatively coupled with the dispenser for normally initiating and terminating the dispensing of the stream of coating as predetermined parts of the workpiece surface come into alignment with the coating outlet in response to the speed and position of the workpiece surface. The invention provides a minimum coating control coacting with the dispenser control unit for depositing a coating of a selectable minimum length to at least one portion of the workpiece surface, said selectable minimum length being substantially less than that achievable by said dispenser control unit alone.

Abstract: A roller apparatus is provided for a flexible web such as a map, chart, window shade or the like which is provided on at least one free margin thereof with a rigid, elongated holder element of predetermined cross-sectional dimensions which are substantially greater than the thickness of the flexible webbing material. The roller apparatus comprises a rigid, elongated tubular roll of substantially greater dimensions than the predetermined cross-sectional dimensions of the holder element and including a longitudinal through slot of a cross-sectional dimension smaller than that of the holder element and greater than the thickness of the web. An end cap is non-rotatably attached to either end of the tubular roll.

Abstract: An antenna defines a coaxial connector receptacle when the antenna is in a fully retracted position.

Abstract: YAn amplified video signal distributing apparatus is provided which has a plurality of input terminals. An associated plurality of input signals are applied thereto for selective application to at least one utilization device which is coupled to the output of the apparatus. The apparatus comprises a primary input terminal, a plurality of secondary input terminals, switches for selecting the signal which appears at one of the secondary input terminals, at least one output terminal, and a signal generator for generating a primary control signal and a secondary control signal. A controllable switch is responsive to the primary control signal for coupling the primary input terminal to at least one of the output terminals and is responsive to the secondary control signal for coupling the signal selected by the selecting switches to at least one of the output terminals.

Abstract: An improved control system for a mobile material distribution apparatus of the type having a ground speed sensor, a distributing device for spreading material along the path of travel of the apparatus, a variable rate delivery structure for delivering material to the distributing structure and a delivery rate sensor. The control system comprises a calculating circuit responsive to signals developed by the ground speed sensor and delivery rate sensor and to a signal corresponding to a desired distribution rate of material for periodically calculating the difference between the desired delivery rate and the actual delivery rate and developing a difference signal. A control signal is developed in response to each difference signal for varying the delivery rate of material to the distributing structure as necessary to achieve the desired material delivery rate.