For the purpose of this article, the terms used herein shall be defined as follows:
A device which shall indicate thereon the length of time during which a vehicle may be parked in a particular place, which shall have as a part thereof a receptacle for receiving and storing coins of United States money, a slot or place in which such coins may be deposited, a timing mechanism which shall indicate the period of time during which parking is permissible and which shall display an appropriate signal when such period of time shall have elapsed and also brief instructions as to the operation of such device.