摘要:
The drive hub for a vehicle, particularly for a bicycle, includes a hub axle 1, a hub shell 9 rotatable relative thereto, and a driver or actuator 13 mounted on the hub axle 1. The driver 13 drives the hub shell 9 over a ball friction gear 17, the ball carrier plates 25 and 27 of which form with the hub axle 1 a rigid gear housing the balls 35 of which, with a guide ring 33, a drive ring 51 and a driven ring 55, enter into a frictional connection which, by the swivelling of the axle pins 37 between drive ring 51 and driven ring 55, permits different rotational speeds. The pressure forces are produced by a thread 47 between driver 13 and drive sleeve 49 proportionally to the driving torque, the pressure spring 57 ensuring a dead-travel-free response of the ball friction gear 17. The infinitely variably adjustable transmission ratio of the ball friction gear 17 is controlled through a control device 79 consisting of rotational elements, through a solid cone 29 which sets in rotation a crank wheel 91, as a result of which the spiral-shaped guide grooves 95 move the ball projections 39 of the ball axles 37 radially outwards or inwards, depending upon the direction of rotation. The ball axles thus swivelled provide for an infinitely variably adjustable transmission ratio between drive ring and driven ring.
摘要:
An electrophotographic recording material comprises a dual photoconductive layer applied to an electrically conductive substrate. The lower layer disposed on the substrate is made of an amorphous system of selenium and arsenic containing 18 to 37 percent by weight arsenic. The layer thereabove is made of As.sub.2-x Bi.sub.x Se.sub.3 or As.sub.2 Se.sub.3-y Te.sub.y. The recording material is highly sensitive in the visible spectral range as well as in the IR range and can therefore also be used for recordings with solid state laser diode radiation. In cyclic operation, the material exhibits only slight fatigue.
摘要:
An electrophotographic recording material, composed of an electrically conductive substrate; a first layer provided on the electrically conductive substrate and composed of an amorphous selenium-tellurium alloy containing form 0.05 to 15 weight % tellurium; a second layer disposed on the first layer and composed of an amorphous selenium-tellurium alloy containing from 15 to 60 weight % tellurium; and a third layer provided on the second layer and composed of an amorphous alloy of selenium and from 0.05 to 5 weight % of one arsenic or tellurium. The electrophotographic recording material is particularly useful in an electrophotographic recording system which includes an infrared radiation means, such as an infrared solid state laser.
摘要:
The central locking installation for motor vehicle door locks blocks the locking element of the door lock by means of an additional, separately controllable blocking member. The locking element and the blocking member are driven by separate electrical drives which are connected into mutually parallel-connected current paths of one common drive current circuit. The drive direction of the two drives is controlled by common switches of a pole-changing circuit which reverses the current direction. Into the current path of the drives of the blocking member there is connected a control switch by way of which these drives can be switched on selectively. In the unlocking direction and the unblocking or releasing direction a time control system controllable by means of the door key in the unlocking of the door switches on the drives of the locking element and of the blocking member simultaneously. In the locking of the door lock only the drive of the locking element is switched on in its locking direction. The control switch which switches on the drive of the blocking member in the blocking direction is actuated when the key is turned beyond the locking position of the lock.