Abstract: A magwell adapter is provided for use with a firearm. The firearm can include a firearm frame having a barrel section and a grip section. The grip section of the firearm can include a sear spring alignment plate, a magazine well, a sear spring, and a main spring cavity. The magwell adapter can be slidably coupled to the bottom end of the grip section of the firearm or coupled in another manner. The magwell adapter can include an aperture for receiving a tab of and holding the sear spring in place within the grip section. The magwell adapter can also include one or more pin receiving apertures adjacent to a rear end of the adapter. The pin receiving apertures can be configured to receive a mainspring housing pin to couple the mainspring housing to the magwell adapter when the mainspring housing is inserted into the grip section of the firearm.

Abstract: A sight mounting system can include an accessory mounting plate that can be removably coupled to the firearm. The accessory mounting plate can include a mounting slot along a bottom side and an accessory mounting surface along the top side for receiving a removable sight thereon. The accessory mounting surface can include one or more projections that extend up from the mounting surface and one or more threaded apertures extending into the mounting surface for coupling a sight to the plate. The plate can also include an alignment pin cavity extending from one side to the other of the plate and another threaded aperture extending into the top side of the plate. The threaded aperture and the pin cavity can both be in fluid communication with the mounting slot. A pin can be inserted into the pin cavity and pushed into place by a screw through the threaded aperture.

Abstract: Example methods and apparatus independently control the seating force in a rotary valve. An example apparatus includes a rotary valve having a flow control member and a dual-acting actuator operatively coupled to the rotary valve. The actuator has first and second ports to receive a pressurized control fluid to change a position of the actuator. The example apparatus further includes a valve controller operatively coupled to the actuator to control the pressurized control fluid in response to a position of the rotary valve. The example apparatus further includes a pressure limiter operatively coupled to the valve controller and fluidly coupled to the first port of the actuator. The pressure limiter is to reduce a pressure of the pressurized fluid provided to the first port of the actuator to reduce a seating force of the flow control member when the rotary valve is in a closed position.

Abstract: Example methods and apparatus for independently controlling the seating force in a rotary valve are described herein. An example apparatus includes a rotary valve having a flow control member and a dual-acting actuator operatively coupled to the rotary valve. The actuator has first and second ports to receive a pressurized control fluid to change a position of the actuator. The example apparatus further includes a valve controller operatively coupled to the actuator to control the pressurized control fluid in response to a position of the rotary valve. The example apparatus further includes a pressure limiter operatively coupled to the valve controller and fluidly coupled to the first port of the actuator. The pressure limiter is to reduce a pressure of the pressurized fluid provided to the first port of the actuator to reduce a seating force of the flow control member when the rotary valve is in a closed position.

Abstract: A threaded connection is secured against loosening/unscrewing for columns of carbon and/or graphite electrodes. The electrodes are connected in columns with threaded connection elements, i.e., carbon connecting pins. At least one part has a wedge ramp on the root of the thread winding. When the components of the threaded connection are screwed together, the crests of the thread windings of one part abut with the wedge ramps of the other threaded connection component. A contact line is created, possibly multiple sections of a contact line. When the parts are screwed together, all forces are transferred from one part to the other only via the contact line. In a special case, the contour of the thread winding along whose root the wedge ramp is running is reduced e.g. to a connecting line between two wedge ramps located one above the other in the cross-section.

Abstract: A burial crypt arrangement comprises precast concrete cells (1) arranged in rows, with the cells (1) in each row being spaced apart and staggered relative to the cells (1) in adjacent rows. The corners (3) of cells (1) in a row are juxtaposed with the diagonally opposite corners of cells in adjacent rows. In this manner, both the spaces within cells, and the spaces between cells, can be used as burial chambers. Each cell (1) is formed by a continuous wall (2) of rectangular shape. Cells may be stacked vertically. The thickness of the wall (2) is tapered, being thicker at the top than the bottom, so that a ledge (9) is formed at the junction of stacked cells. An intermediate lid (10) can be supported in each burial chamber by the ledges (9). Each burial chamber is closed by a top lid (12). A trailer (17) can be used to raise and transport the lids (12).