The invention relates to a device for the relative adjustment of an envelope and a cap of a filament lamp by means of an optical system with which a reproduction of the filament of the lamp is projected on photoelectric cells. According to the invention the optical system comprises a number of bundles of light conductors which with their one end communicate with the photoelectric cells and with their other end debouch into a screen on which the filament is reproduced.

A device which will releasably secure a closure to an opening in a walled structure with the opening adjacent to one of the walls thereof. The device is comprised of a rotatable crank journaled through the wall adjacent to the opening. A handle is attached to the portion of the crank extending externally of the structure for the purpose of rotating the crank, and receiving means are affixed to the inner surface of the closure for the purpose of releasably engaging the portion of the crank extend...

A safety device for machine tools including a transmitter for delivering a signal of sonic frequency to a selected area of the tool, a receiver arranged in a predetermined relation to the selected area and operable to provide an output signal when an emitter signal of predetermined magnitude is received and a control responsive to the output signal from the receiver for enabling the machine operation in response to an output signal.

A safety device for lowering persons or loads from high elevations, such device featuring a revolving cylinder which is selectively coupled to a rope drum or wheel when the velocity of the drum is sufficiently great. The cylinder is mounted on a single shaft and encloses a centrally located or middle piston which is pinned to the cylinder and serves as a partition to divide the inner chamber into two portions. The middle piston is movable rotationally with the cylinder but is immovable axially. ...

The invention disclosed relates to a sealing device which is applied between two elements, movable in relation to each other and intended to prevent leakage of high pressure fluids or other media between a high pressure side and one of low pressure. The device disclosed comprises a ring assembly having a number of circular sealing rings compressed against a surface of revolution of at least one element. The rings are pressed against each other by a compression force and each has an open slit for...

A display device including a back panel mounted on a generally upstanding support, magnet means to secure a sheet of visual material for display therebetween and a transparent bubble member enclosing the back panel, the sheet of visual material and the magnetic means to provide a weathertight assembly.

For use with the throttle valve shaft of a carburetor or the like, the present invention provides a resetting device that normally opposes the displacement of the actuating element for the throttle valve shaft. The present invention is particularly characterized by a second, prestressed spring for resetting the actuating element should the first spring become inoperative. Means are provided for normally restraining the second spring so that it does not function unless the first spring becomes in...

A portable sanitation device for collecting fecal matter particularly from dogs, including a short annular member having an upstanding rim over which may be folded the outer edge portion of a disposable bag, the main part of which bag extends within the annular member, releasable clip means being provided for retaining the edge portion of the bag. The device also includes a hinged lid which normally closes the top of the bag, and a long handle allowing a person standing upright to hold the annul...

A fastener attachable to a workpiece which is accessible from only one side. The device will include an elongated body carrying a pivotable toggle member retained therein. Slots in the body member will receive bosses fixed to the toggle allowing the toggle to rotate and be selectively axially located. The slots will include a plurality of axially spaced means to retain the toggle in a position transverse the body and will also include means to initially retain the toggle in a position longitudin...

A cutting device particularly suitable for forestry application. The device has two cutting discs coaxially mounted for rotation about a common axis. The discs are spaced apart along the common axis and each has a plurality of radially outwardly directed cutting tools mounted around its periphery. Located between the two cutting discs is a cutting chain having outwardly directed cutting tools. The chain moves along a guideway describing a circular sector about the common axis of the discs and in...