Nippon Gakki Seizo Kabushiki Kaisha

Takashi Onoda

Minoru Shimauchi

Yuji Fujiwara

Yoshihiro Umeda

Seiji Inano

Kenjiro Dokan

Shinichi Kamo

Yoshiyuki Hiramatsu

A method of manufacturing a wire harness with nipped connectors uses a work table having connector holding tools and wiring/nipping tools in a predetermined pattern thereon and a robot with a hand which can be freely moved on the work table. The hand can selectively hold at least a connector holding head for loading connectors in the connector holding tools and a wiring/nipping head for performing wiring between the connectors to prepare a wire harness.

Method of manufacturing wire harness by using nipped connector and

A method and an apparatus for adjusting the vibration frequency of vibrating objects such as piano strings, by stepwise adjustment of the vibration frequency of a vibrating object. The amount of the required adjusting operation in each of the adjustment steps is calculated by the equation:

Method and apparatus for adjusting vibration frequency of vibrating

A system for measuring the vibration frequency of a vibrating object useful for the adjustment of the vibration frequency of a piano string or like vibrating objects. In this system, the vibration of the vibrating object is converted to an electric signal, based on which signal is sought the difference between the vibration frequencies of any two adjacent harmonics of the vibrating object, i.e. the fundamental vibration frequency of the vibrating object is sought. The electric signal is led to a counter via a voltage-controlled variable band-pass filter. The middle frequency of the pass-band of this filter is controlled by a sweeper and varies continuously. For each agreement of this middle frequency of the pass-band with any one of the harmonics, the output of the filter presents a peak. The frequency corresponding to each peak is detected by a counter. The fundamental frequency is calculated from the difference between the frequencies corresponding to any adjacent peaks of the outputs of the filter. In another aspect of the system, the electric signal of vibration discussed above is inputted respectively, to a pair of band-pass filters whose respective middle frequencies are selected so as to agree with the frequencies of any adjacent two harmonics, and the outputs are multiplied by a multiplier. From the multiplied signal is derived, through a low-pass filter, a lower frequency component which now has the aimed fundamental vibration frequency.

System for measuring vibration frequency of vibrating object

Growing community of inventors

Hamakita, Japan

Takashi Onoda