Abstract: An alignment system for a golf putter, having a plurality of interchangeable top plates for a putter head, wherein each of the interchangeable top plates has differing alignment indicia.

Abstract: A faceplate for golf clubs, such as a putter, iron or driver designed to control the spin of a golf ball after impact. The volume immediately behind the striking face comprises a plurality of angled elements which may be holes, slots or objects such as pixels, bars, or pins. Compression and rebound of the faceplate upon impact imparts spin to a golf ball according to the choice and arrangement of the angled elements. The invention can be used to start a ball rolling at impact with a putter head, thus enhancing the accuracy of a putts. The invention may also apply corrective spin to off-center putter hits, increase backspin for greater loft and chipping control, or correct for hooking and slicing side-spin in off-center hits with iron or drivers.

Abstract: A method and apparatus to create billing records in a rating engine. The method comprising the steps of assembling one or more sets of subscriber information; assembling a rating plan; associating a rating procedure with a rating engine; calculating billing records with the rating engine through the rating procedure using the rating plan and the subscriber information. The method and apparatus are applicable to any service where a subscriber is billed by the usage of a service or where the subscriber is billed a periodic basis for the service.

Abstract: A security system comprises electronic means for generating a group of pulses of predetermined frequency, which group has a unique identity specified by the particular durations of its constituent pulses; means for transmitting that group of pulses; means for receiving that group of pulses; and means responsive to that received group of pulses only when it has said unique identity. Preferably the pulses are bursts of high frequency waves, and the means responsive to received pulses includes means for establishing tolerance intervals for the ends of corresponding pulses.

Abstract: In a follow-up servo system for the electrical control of a friction clutch of, say, a motor vehicle from the throttle control by way of an electro-mechanical actuator, with automatic take-up of the wear of the mating friction surfaces, whenever the clutch plate (i.e. the axially-movable part) is in its fully-engaged (FE) position with respect to the cooperating axially-fixed part a signal is repetitively derived to represent the corresponding just-touching (JT) position of the plate under the then conditions of wear. To this signal is added a signal from the throttle control within a range corresponding to the JT-FE range of the plate, thereby forming a demand signal corrected for wear. From a comparison of it with a measurement signal representing the actual position of the plate an error signal is derived for application to the actuator in the appropriate sense.