Check-actuated control mechanisms – Including means to test validity of check – By testing material composition
Patent
1987-03-25
1989-04-11
Bartuska, F. J.
Check-actuated control mechanisms
Including means to test validity of check
By testing material composition
194330, G07D 508
Patent
active
048197807
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a device for verifying coins, with at least one self-induction coil excited by high frequency and serving as an inductive probe, which coil can be influenced by the coin to be checked for generating a signal depending on the type of coin.
It is known, for example, to design and arrange two such probes so that the signal of one probe depends essentially on the coin diameter and the signal of the other depends essentially on the alloy characteristics of the coin governing for the influence, in order to verify whether the coin has these two properties of an acceptable coin (FR-A-No. 2 212 589).
However, an important distinguishing feature of differing coins is the stamped pattern, i.e. the indication of a number and of the currency on one side, and the representation of a coin design, for example a coat of arms, on the other side of the coin. Coins of approximately identical dimensions and alloy differ solely by the stamped design. In conventional devices for coin verifying, the stamped pattern, however, is not taken into consideration.
Although it is conventional to check also the depth of the impress (U.S. Pat. No. 4,108,296), this does not yield information regarding the impress design. Different coins can quite definitely be stamped to the same depth.
The invention is to provide a remedy in this respect. The invention, as characterized in claim 1, solves the problem of providing a device for coin verification which yields a coincidence signal in case the impress design of the coin to be checked coincides with the impress design of one of several, specific, acceptable coins. In the dependent claims, special embodiments of this invention are set forth.
The advantages attained by the invention are to be seen essentially in that the impress design of one coin side is generally already sufficient for distinguishing the coin from coins of all other kinds, and optionally correlating the coin with a specific one of several coin types denoted to be acceptable. Since several coin types of the same currency frequently exhibit the same coin design in differing sizes, it is important that the device of this invention also distinguishes among such coins. Additional advantages of the invention and their embodiments can be seen from the following description.
The invention will be described in greater detail below with reference to drawings depicting merely one possibility for practising the invention. In the drawings:
FIGS. 1 and 2 are a lateral view and a cross section of a coin guide,
FIGS. 3 and 4 illustrate a process during which an inductive measuring probe scans a track on a coin rolling past this probe in front of the latter,
FIG. 5 shows a block circuit diagram of a device for coin verification, and
FIG. 6 is a signal diagram.
The coin guide, of which FIG. 1 shows a lateral view and FIG. 2 a cross section along line II--II in FIG. 1, comprises a roll track surface 1 for the coin 2 to be checked and a steep guide surface 3 along which latter the coin 2, rolling on the roll track surface 1, slides with its obverse side or reverse side contacting.
An inductive probe 5 is arranged behind the guide surface 3, this probe extending up to, or almost up to, the guide surface 3. The diameter of the probe 5 is substantially smaller than the diameter of the smallest acceptable coin, and the spacing of the probe 5 from the roll track surface 1 is larger than the radius and smaller than the diameter of that of the coins to be accepted which has the smallest diameter. The objective thus attained is that the probe 5 scans a track along coins of the denoted diameter range rolling past the probe which is of adequate length for the present purposes described in greater detail below.
FIG. 3 shows the coin 2 with a scanning track, and FIG. 4 shows three phases of the scanning operation. In FIG. 4, the coin reaches the probe 5 in its position 2a, whereupon the site 7 of the coin edge passes by the probe 5. At 2b, the coin 2 is in a central position with respect to the probe 5, the site 8 passing by the probe
REFERENCES:
patent: 3918565 (1975-11-01), Fougere et al.
patent: 3921003 (1975-11-01), Greene
patent: 4124111 (1978-11-01), Hayashi
patent: 4601380 (1986-07-01), Dean et al.
Luder Stefan
Trummer Bernhard
Autelca AG.
Bartuska F. J.
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