Disclosed is an apparatus for practicing removal of a deformative damage to a workpiece. The apparatus includes a metallic frame having a cover disposed thereon. The metallic frame is configured to receive the workpiece. The metallic frame is further provided with predetermined number of holes on side surface of each of its walls. The metallic frame further includes protrusions provided at least at each corner of the metallic frame. The cover is provided with predetermined number of holes on its top surface. The apparatus further includes supporting legs connected with the metallic frame at one end and resting on a surface at the other end. Furthermore, the apparatus includes a securing structure configured to firmly secure the supporting legs on the surface, wherein the workpiece comprises of holes at least to receive the protrusions provided at least at each corner of the metallic frame in an event the workpiece is placed on the metallic frame with the cover disposed thereon.

A pilot and burner apparatus is provided for use in firefighting training. The apparatus includes a main fuel conduit and a main fuel valve. The apparatus includes a pilot tube and a pilot fuel conduit configured to deliver fuel from the main fuel conduit to the pilot tube. The apparatus includes main and pilot fuel valves to respectively control a flow of fuel in the main and pilot fuel conduits. In a pilot phase, the valves direct fuel to the pilot tube. An ignition component is configured to ignite fuel in the pilot tube to generate a pilot flame. In a burn phase, the pilot flame generates a controllable flame out of a main burner pipe by igniting fuel exiting the main fuel conduit. The controllable flame can be delivered to a training structure for training purposes.

A home interior decorating kit with multiple interchangeable decorative elements for temporary attachment to multiple home interior items such as table runners, chair back covers, decorative pillows, towels, curtains, and tissue boxes. Each of the home interior items includes a connection area for receiving one or more decorative elements. These elements are entirely interchangeable, providing a highly customizable home interior decoration kit. The decorative elements can be attached to the home interior items using hook-and-loop fasteners, buttons, snaps, zippers, or any suitable connection type.

An assembly for demonstrating sound transmission properties includes a base portion and a tray portion partially defining a transmission aperture is removably inserted into a portion of the base portion. A first sound-reducing tile having a first sound transmission property is placed in the tray portion and a sound generating device disposed in an interior volume of the base portion emits sound that is attenuated by the first sound-reducing tile as the sound exits the transmission aperture. A second sound-reducing tile having a second sound transmission property is placed in the tray portion and the sound generating device disposed in the interior volume of the base portion emits sound that is attenuated by the second sound-reducing tile as the sound exits the transmission aperture. A sound measuring device disposed outside the interior volume device can compare the first and second sound transmission properties.

An object is enclosed but moveable within a container. An interior surface of the container includes two or more distinct areal segments exhibiting corresponding surface characteristics. Movement of the object while in contact with each areal segment results in a corresponding sensory input to a user moving the container. The corresponding surface characteristic of each areal segment differs from the corresponding surface characteristic of at least one other areal segment, so that the corresponding sensory inputs to the user resulting from movement of the object while in contact with those areal segments differ from one another. The corresponding sensory inputs can include auditory inputs, tactile inputs, visual inputs, olfactory inputs, or sensor readouts. The article can be employed in methods wherein a user identifies the object, or characterizes the object or areal segments, based on the sensory inputs.

A ship model having an elongated ship body configured in such a way that the ship body is divided over its longitudinal extent (L) into a plurality of segments that can move relative to one another and can be lowered below a water surface.

A ship model having an elongated ship body configured in such a way that the ship body is divided over its longitudinal extent (L) into a plurality of segments that can move relative to one another and can be lowered below a water surface.

This invention involves a balance scale with a base, a balance arm support, a balance arm, a pointer, a counter-balance, a movable label plate containing descriptions and an optional parallel beam. The balance arm has a tray on each end, where one tray holds an article representing mankind with sin, and the other tray holds an article representing the redemptive work of Jesus Christ. The articles on each tray are of equal or approximately equal weight. The scale rotates when the weight of the articles are added to or removed from the trays, and the scale rotation will determine which description the pointer will point to. This invention can be used as a Christian teaching aid showing the benefit of choosing to accept the death of Christ as payment in full for our sins, along with showing the consequence of our refusal to accept the death of Christ as payment for our sins.

The present invention relates to a demonstration device enabling the contrast of mask filters comprising a cabinet wherein a dust cavity and a demonstration cavity with right opening are formed with a partition plate. On the partition plate is set a communication port to communicate the dust cavity with the demonstration cavity. On the upper part of the demonstration cavity, are set a dust collecting movable motor and a dust collecting movable screw which cooperate with each other, and on the said dust collecting movable screw, a dust collecting movable block is fixed by plug push cooperation. To the lower end of the dust collecting movable block, a dust collecting rotary motor is installed and under the dust collecting rotary motor, a dust collecting frame is installed. In the middle of the dust collecting frame, a dust collecting partition plate is installed. On the bottom of the dust collecting frame and on both sides of the dust collecting partition plates, dust collecting contrast blocks are installed. On either right and left sides of the dust collecting frame, a mask filter and contrast device which use masks to function which are both connected to the inner cavities are respectively installed. Both the mask filters and contrast devices are connected to the communication port. The present invention may directly present the dust-proof effects of the mask filters compared with common facial masks and achieve good teaching experience.

The present invention relates to a demonstration device enabling the contrast of mask filters comprising a cabinet wherein a dust cavity and a demonstration cavity with right opening are formed with a partition plate. On the partition plate is set a communication port to communicate the dust cavity with the demonstration cavity. On the upper part of the demonstration cavity, are set a dust collecting movable motor and a dust collecting movable screw which cooperate with each other, and on the said dust collecting movable screw, a dust collecting movable block is fixed by plug push cooperation. To the lower end of the dust collecting movable block, a dust collecting rotary motor is installed and under the dust collecting rotary motor, a dust collecting frame is installed. In the middle of the dust collecting frame, a dust collecting partition plate is installed. On the bottom of the dust collecting frame and on both sides of the dust collecting partition plates, dust collecting contrast blocks are installed. On either right and left sides of the dust collecting frame, a mask filter and contrast device which use masks to function which are both connected to the inner cavities are respectively installed. Both the mask filters and contrast devices are connected to the communication port. The present invention may directly present the dust-proof effects of the mask filters compared with common facial masks and achieve good teaching experience.