# US 5,343,724 A · Lock arrangement employing mechanically acting code card and key card

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- Number: US 5,343,724 A
- Document ID: US5343724A
- Status: Granted
- Kind: A
- Application number: 08/059,114
- Filed: 1993-05-07
- Granted: 1994-09-06
- Earliest claimed: 1993-05-07
- Assignees: TrioVing AS
- Inventors: Tor Sornes
- Web page: https://patentgrep.com/patent/US5343724A

## CPC

- E05B 35/007: {the key being a card, e.g. perforated, or the like (E05B47/0045 takes precedence)}
- E05B 27/0028: {Other locks than cylinder locks with tumbler pins or balls}
- Y10T 70/7463: Master- and change-key
- Y10T 70/7531: Transverse
- Y10T 70/7734: Automatically key set combinations
- Y10T 70/7751: With ball or roller
- E05B: LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

In a locking apparatus that utilizes bores and blocking pins along with key cards and code cards to unlock the lock, a master card key is employed with holes in all of the master card bores and balls are used instead of blocking pins.

## Claims

### Claim 1

In a lock apparatus having a lock housing and a locking member slidable in said lock housing between a locked and an unlocked position and a plurality of bores in both said lock housing and said locking member which are aligned when said lock apparatus is in a locked position, a plate-like code member having regions corresponding to said bores, at least one of said regions having a hole therein, a plate-like key member having regions corresponding to said bores, said regions having holes therein corresponding to said regions of said plate-like code member having no holes therein, the improvement comprising:
a bullet-shaped upper blocking member positioned in each of said bores in said lock housing;
each said bore having either a lower blocking pin or a lower ball therein, with at least one said bore having said lower blocking pin;
a spring means acting to push said lower blocking pin or said lower ball against the bottom of said bullet-shaped upper blocking pin;
a plate-like master member having regions corresponding to said bores, said regions having holes corresponding to said bores having lower balls and the same combination of holes or no holes as said plate-like code member for said bores having lower blocking pins.