A centrally controlled telephone exchange installation having a plurality of subscriber stations authorized to accept calls for each other wherein a call from a calling repeater for one subscriber station is indicated to the other subscriber stations with an arrangement for the acceptance of a call for a subscriber station by another authorized subscriber station. A centrally arranged storage means is provided and assigned to all subscriber stations authorized for the reciprocal acceptance of ca...

A collection receptacle or vault for receiving valuables from a cash box. The cash box is of the type including a discharge opening and a movable wall normally covering the discharge opening. The receptacle includes a door providing access to an area receiving the cash box. A handle is located on the exterior of the door, and when the door is closed and the handle turned, the cash box is actuated for dumping the valuables through the discharge opening of the cash box into a vault area. Locking m...

A bill accepting device judges whether a deposited bill is a true bill or not and produces a true bill signal if it is a true bill. A device such as a vending machine utilizing this bill accepting device receives this true bill signal, counts the number of the deposited bill and, upon confirming that the counting has been properly made, produces a true bill confirmation signal. The bill accepting device receives the true bill confirmation signal and thereby confirms that the true bill signal has...

A coin acceptance construction and method for use with a predefined price vending system which includes coin analysis apparatus capable of producing coin analysis data for determining coin validity, a controllable mechanism operable to effect the acceptance or return of deposited coins, coin availability status monitors for determining coins available for payback, such monitors producing coin availability status data indicative of the status of coins available for payback, and vend control circu...

A token which cannot be easily counterfeited by inexpensive methods is disclosed, together with a simple token acceptance mechanism which will reject easily-made counterfeit tokens. The token is a disk-shaped object which has two sections along its axis. One section has a notched periphery and the second section has a smooth periphery. The notched section interacts with a pawl in the token acceptance mechanism and the smooth section interacts with an arm. The pawl and arm are interlocked so that...

An autofocusing motion picture camera having an adjustable focus zoom lens and having means for periodically determining the distance to subjects within the focusing range of said lens is provided with an object presence sensing transducer having an acceptance angle that encompasses the optical field of view angle of said lens whenever the telephoto lens position is selected.

A computerized delivery-acceptance system has a delivery container (1) with a computer-control input door (4) and an outlet door (18). The input door has a lock (5) that can be unlocked by computer-controlled recognition of access authorization for placing delivery items (2) in the delivery container. After the delivery items are placed in the delivery container, the input door is closed and locks automatically. Then the outlet can be opened separately for receiving the delivery items. Computeri...

Alloantigen is extracted from a cellular source, preferably blood cells, with a mild detergent, and partially purified by precipitation of potentially interfering components. The alloantigen preparation is then used in an assay to determine the presence and specificity of receptors specific for alloantigens. The detection of bound receptor is determined by ELISA or other suitable immunoassays.

A check verification system for providing customer-operated verification of checks at point-of-sale locations. The present system enables a customer to verify several possible kinds of checking functions, including verification of payroll or government checks as well as certain types of personal checks for cash, and sets limits on the number of times each checking function will be verified in a period of time. The system utilizes a number of local point-of-use terminals which are operated by the...

A vending machine provides a warning indication that insufficient change may be available if the total amount of available change is less than the value of the highest-denomination monetary unit which is not refundable. An insufficient change indication is also provided in response to inserting a coin or instructing a vending operation which would result in the amount of refundable change being less than the correct amount by a value which is greater than a predetermined, alterable overpay amoun...