A speed barrier includes a heavy lower barrier and a lighter upper gate. The barrier and gate may normally be positioned to allow or to restrict passing of vehicles. The barrier is configured to receive and survive the main impact of a vehicle attempting to ram through the speed barrier. The gate and barrier are coupled to allow an extension or a retraction of the gate and barrier in unison. The barrier and gate are supported by left and right columns, and an upper end of the gate is supported b...

Speed governor for automatic trains comprising a dynamo electric device having a plurality of stators, one for each of a plurality of different predetermined speeds, and a common rotor mounted on a shaft connected to an axle of the train and each stator having a primary winding connected across an a.c. supply and a secondary winding connected via a saturable transformer to the d.c. control winding of a transductor whose a.c. winding is connected in the a.c. supply circuit to the stator, a windin...

A speed sensor includes a magnetic pickup generating a cyclical output based upon passing teeth of a rotating gear. A counter counts the number of clock pulses that are generated during a measurement period of the cyclical output. The measurement period, in terms of cycles of the cyclical output, is varied based upon the number of pulses that were counted in a previous measurement period. Thus, at lower speeds, the number of clock pulses generated during fewer cycles is counted, while at higher ...

A speed reducer having a fixed first member, a second member opposed to the first member, a pressing member and for inclining the second member and making it bear against the first member. The pressing member also presses the second member so that the bearing portion thereof may describe a circular locus. Also provided are an output shaft and a connecting member connecting the second member and the output shaft together.

The invention relates to a speed filter for an internal combustion engine. Said filter contains a calculation rule (BV(i)), which is used to completely or partially eliminate a speed oscillation of the i-th order, thus improving the dynamics and the robustness of the speed control loop.

The present invention provides a speed governor (5) suitable for use in a fluid driven down-hole tool (3). The speed governor comprises an actuator (7) operatively coupled to a motive fluid flow control valve (6). The actuator is and arranged so as to be activatable, directly or indirectly, in response to the running speed of the tool (3), for opening of the control valve (6) with increasing rotational speed of the motor (3) above a predetermined speed limit thereby to limit the rotational speed...

A miniature-sized toy vehicle that is set in motion with a push along straight-ahead path of movement and which rides on a wheel bearing in depending relation from the vehicle chassis, the revolving mode of which wheel bearing contributes to an optimum length of travel, and wherein the vehicle chassis has a straight movement about the wheel bearing and during its travel will not turn aside and keep a proper position for travel along straight-ahead path of movement, to further increase the length...

A speed plate device that is bonded to a Bernoulli plate for juxtaposition to a rotating flexible magnetic disk so that the flexible disk is rendered substantially rigid by a vacuum formed by the air between the speed plate/Bernoulli plate surface and the disk being urged outwardly under the influence of centrifugal force is disclosed. The speed plate device provides a method and means for spinning flexible magnetic media at high spins without any associated signal loss or modulation normally ex...

The present invention provides a combination tool for use by an individual workman, without resorting to assistance by another workman, for laying out horizontal and plumb lines in a confined space, such as that found in a shower stall, bathtub enclosure, or fireplace. The invention has a body in the shape of an isosceles triangle. Centrally positioned referencing levels align with the centerlines of each leg of the triangle. The referencing levels are duplicated in order to provide better accur...

A speed wrench includes an open end having a through portion connected to a shank of the wrench and a first jaw and a second jaw respectively extend from the throat portion. The first jaw has a first flat surface defined in an inside thereof and the second jaw has a second flat surface defined in an inside thereof. A throat recess is defined in the throat portion ad a first recess is defined in the inside of the first jaw, and a second recess is defined in the inside of the second jaw. An end of...