Abstract: An optical sight is provided and may include an optics train having at least one prism with a first surface, a display associated with the first surface to selectively supply the first surface with an image, and a processor in communication with the display to provide the display with the image. An infrared camera may be in communication with the processor and may provide the processor with thermal-energy data for use by the processor in generating the image.

Abstract: An optical sight is provided and may include a housing having a base, a first post extending from the base, and a second post extending from the base. The optical sight may additionally include an optical element supported by the housing between the first post and the second post, a reticle displayed on the optical element, and an illumination system generating the reticle. A first actuation member may be disposed on one of the first post and the second post and may selectively control an intensity of the reticle by controlling an output of the illumination system.

Abstract: A sight is provided and may include a housing having a first end, a second end, and an opening extending along a longitudinal axis between the first end and the second end. The sight may also include an optical fiber supported by the housing and a sighting pin having an aiming point extending into the opening of the housing and receiving light from the optical fiber to illuminate the aiming point. The sighting pin may include a longitudinal axis disposed substantially perpendicular to the longitudinal axis of the opening.

Abstract: An optical sight is provided and may include an optical element and a reticle displayed on the optical element. A housing of the optical sight may include a base, a first post extending from the base, a second post extending from the base, and a cross member extending between the first post and the second post to define an opening receiving the optical element therein. The first post and the second post may extend above the opening and away from the base a greater distance than a top surface of the cross member.

Abstract: An optical sight is provided and may include a housing having a base, a first post extending from the base, and a second post extending from the base. The optical sight may additionally include an optical element supported by the housing between the first post and the second post, a reticle displayed on the optical element, and an illumination system generating the reticle. A first actuation member may be disposed on one of the first post and the second post and may selectively control an intensity of the reticle by controlling an output of the illumination system.

Abstract: An optical sight is provided and may include an optics train having at least one prism with a first surface, a display associated with the first surface to selectively supply the first surface with an image, and a processor in communication with the display to provide the display with the image. An infrared camera may be in communication with the processor and may provide the processor with thermal-energy data for use by the processor in generating the image.

Abstract: An optical sight is provided and may include an optical element, a reticle displayed on the optical element, and a housing. The housing may include a base, a first post extending from the base, a second post extending from the base, and a cross member extending between the first post and the second post to define an opening receiving the optical element therein. The first post and the second post may extend above the opening and away from the base a greater distance than a top surface of the cross member.

Abstract: An optical sight is provided and may include an optical element, a reticle selectively displayed on the optical element, and a housing. The housing may include a base, a first post extending from the base, a second post extending from the base, and a cross member extending between the first post and the second post to define an opening receiving the optical element therein. The cross member may include a first surface opposing the optical element and a second surface disposed on an opposite side of the cross member than the first surface, whereby the second surface has a substantially concave shape.

Abstract: A sight is provided and may include a housing having a first end, a second end, and an opening extending along a longitudinal axis between the first end and the second end. The sight may also include an optical fiber supported by the housing and a sighting pin having an aiming point extending into the opening of the housing and receiving light from the optical fiber to illuminate the aiming point. The sighting pin may include a longitudinal axis disposed substantially perpendicular to the longitudinal axis of the opening.

Abstract: An optical sight is provided and may include an optical element, a reticle displayed on the optical element, and a housing. The housing may include a base, a first post extending from the base, a second post extending from the base, and a cross member extending between the first post and the second post to define an opening receiving the optical element therein. The first post and the second post may extend above the opening and away from the base a greater distance than a top surface of the cross member.

Abstract: An optical sight is provided and may include an optical element, a reticle selectively displayed on the optical element, and a housing. The housing may include a base, a first post extending from the base, a second post extending from the base, and a cross member extending between the first post and the second post to define an opening receiving the optical element therein. The cross member may include a first surface opposing the optical element and a second surface disposed on an opposite side of the cross member than the first surface, whereby the second surface has a substantially concave shape.

Abstract: An optical sight is provided and may include a housing, an optical element supported by the housing, and a reticle. An illumination system may selectively display the reticle on the optical element and may include a switch supplying the optical element with light from one of a first light source and a second light source to generate the reticle.

Abstract: An optical sight is provided and may include an optical element and a reticle displayed on the optical element. A housing of the optical sight may include a base, a first post extending from the base, a second post extending from the base, and a cross member extending between the first post and the second post to define an opening receiving the optical element therein. The first post and the second post may extend above the opening and away from the base a greater distance than a top surface of the cross member.

Abstract: A pneumatic percussion hammer for attachment to a drill tube is coaxially constructed about an outflow tube which is mounted therein for axial removal and replacement when worn. A cylindrical piston moves axially between a top sub wherein a drill stem is screwed, and an anvil of a bit at the bottom. A casing and the piston are configured to valve the flow of pressurized air therethrough for reciprocating motion of the piston and an outflow that carries debris through the outflow tube and drill stem.

Abstract: A pneumatic percussion tool for rock breaking and other purposes having removably enclosed within an outer casing a pneumatic engine including a cylinder with a work head extending slidably from its lower end, a piston slidable in the cylinder impacting the work head on its downstroke. The piston serves also as a sliding valve into which compressed air is admitted through an air inlet tube fixed coaxially in the cylinder and on which the piston is slidable. The piston and cylinder are formed with such air ports and passages that the engine remains at rest until the work head applied with pressure to a work-piece is retracted into the cylinder displacing the piston valve which thereupon is reciprocated, causing the work head to deliver percussive blows while applied to the work-piece. At the final part of its upstroke, the piston enters a compression chamber or energy cell which thus decelerates the piston and commences its downstroke.

Abstract: A pneumatic percussion hammer casing (10), a top sub (23) connected to the outer tube of a double tube drill stem, an air feed pipe (19) extending from the top sub (23) co-axially into the casing and co-axially about an air outflow pipe (21) connected at its upper end to the inner drill stem tube, its lower end slidable in an air passage (38) through bit (31) the shank of which (32) is slidable in a driver sub (33) at the lower casing end and topped by an anvil (35), a passage (43) having ducts (39,44) extending to the exterior of the bit (31). A tubular piston (27), slidable in the casing (10) co-axially about the air outflow pipe (21) engages, when brought down onto the anvil (35), tube (37) rising from passage (38) through the bit, shank and anvil. Annular chambers (11, 12, 13) are formed within the casing (10) and the axial passage of the piston is divided into upper and lower passages (29,30).

Abstract: A rock drilling bit for a pneumatic percussion hammer has a bit head and an anvil extending up from the bit head and slidable in the bit drive sub of the hammer. So the bit will be rotated with the hammer without unduly stressing the anvil, the upper part of the bit head is of non-round cross-section and slidable in a socket of corresponding cross-section in the bit drive sub. If the anvil is not integral with the bit head, but is screwed into it, the lower part of the anvil is of matching non-round cross-section so torque applied by the rotating hammer is applied equally to anvil and bit head.

Abstract: A pneumatic percussion rock drilling hammer has a tubular housing for connection to a drill rod through which compressed air is introduced, the shank of a drill bit with an anvil at the top being slidable in the bottom of the housing, a piston being reciprocally slidable in the housing. Enlargements of the internal diameter of the housing define top, central and bottom pressure chambers. Air from the drill rod passes through a feed tube to an upper axial passage in the piston, and on the down-stroke of the piston a lower axial passage therein engages a sliding seal tube leading to an air passage through the bit. Pressure ports in the piston direct air from the piston's upper axial passage to the top pressure chamber when the piston is raised, and to the bottom pressure chamber when the piston is lowered, and exhaust ports in the piston conduct air between its lower axial passage and the central pressure chamber and from the central chamber to the top pressure chamber when the piston is lowered.