US3754227A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hotel signalling system
Assignee: Individual
•
Filing: 1971-12-27
•
Granted: 1973-08-21
•
Expires: 1991-12-27
Abstract
Abstract A system of multiple apparatuses for a signalling- and indicating function of a hotel, each apparatus embodying a transmitter possessing an indicator key, a receiver possessing a signal lamp and connection terminals for the infeed of power. According to important aspects of this invention, the transmitter possesses a coding mechanism controllable by the indicator key for simultaneously producing a control signal and at least two address signals, and wherein the receiver possesses a decoding mechanism for actuating a storage. At the output of the receiver there is connected the signal lamp.
Inventors
- 👤 S Andersson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:17
CPC Classifications
G; G08; G08C; G08C19/00; G08C19/30; G08C19/34; G08B; G08B5/00; G08B5/22; G08B5/36
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
219 words
A system for hotels for reporting and signalling, to at least one central monitoring location, the condition of each one of a plurality of individual rooms, wherein the system comprises: a plurality of modules, said modules each including means for transmitting coded signals and means for receiving coded signals, said means for transmitting coded signals including an indicator key means, a coding mechanism controllable by said indicator key means for simultaneously generating at least two address signals and at least one control signal, said means for receiving coded signals including a decoding mechanism, a storage mechanism actuated by said decoding mechanism, a signal lamp responsive to said storage means, a plurality of n address lines for interconnecting the rooms into said system where n is at least less than the number of rooms, said transmitter means and said receiving means each being interconnected to at least two of said address lines and one of said control signal lines, an individual one of said plurality of modules being located in each one of said plurality of rooms, connection means for the delivery of power to said modules, and wherein is provided a plurality of said modules at said central monitoring location, the modules being interconnected to ones of said address and control lines identified with the respective room located modules.
Claim 2
Independent Claim
219 words
A system for hotels for reporting and signalling, to at least one central monitoring location, the condition of each one of a plurality of individual rooms, wherein the system comprises: a plurality of modules, said modules each including means for transmitting coded signals and means for receiving coded signals, said means for transmitting coded signals including an indicator key means, a coding mechanism controllable by said indicator key means for simultaneously generating at least two address signals and at least one control signal, said means for receiving coded signals including a decoding mechanism, a storage mechanism actuated by said decoding mechanism, a signal lamp responsive to said storage means, a plurality of n address lines for interconnecting the rooms into said system where n is at least less than the number of rooms, said transmitter means and said receiving means each being interconnected to at least two of said address lines and one of said control signal lines, an individual one of said plurality of modules being located in each one of said plurality of rooms, connection means for the delivery of power to said modules, and wherein is provided a plurality of said modules at said central monitoring location, the modules being interconnected to ones of said address and control lines identified with the respective room located modules.
Claim 3
Dependent Claim
93 words
The system as defined in claim 1, wherein said coding mechanism embodies an amplifier means with at least three decoupled outputs, said decoding mechanism comprising at least two AND-gates, each of said AND-gates being provided with three respective inputs and a respective output, said storage comprising a binary storage means which is electrically coupled with the outputs of said AND-gates, a respective tWo inputs of each said AND-gate being parallely connected and serving to receive the address signals, and the remaining respective input of each said AND-gate serves to receive the control signal.
Claim 4
Dependent Claim
42 words
The system as defined in claim 1, further including a differentiation element arranged between said indicator key and said coding mechanism for producing control and address signals of brief duration which are independent of the duration of actuation of said indicator key.
Claim 5
Dependent Claim
60 words
The system as defined in claim 3, wherein said coding mechanism comprises a direct-current, single stage transistor amplifier having an input and an output, said transistor output being connected via diodes with three output terminals, said differentiation element comprising a capacitor for connecting said indicator key with said input of said transistor amplifier and a discharge resistor bridging said capacitor.
Claim 6
Dependent Claim
17 words
The system as defined in claim 2, wherein said binary storage means defines a two-stage flip-flop storage.
Claim 7
Dependent Claim
24 words
The system as defined in claim 2, wherein said binary storage means defines a two-stage storage in the form of a bistable polarized relay.
Claim 8
Dependent Claim
29 words
The system as defined in claim 1, further including a second coding mechanism, said indicator key comprising switch means having a contact means connected with said second coding mechanism.
Claim 9
Dependent Claim
75 words
The system as defined in claim 1, further including a substantially quadratic shaped housing for accommodating said apparatus, said indicator key and signal lamp being combined into a luminous key and at least partially arranged in an open end of said housing, the other end of said housing being provided with a multiple plug, an intermediate socket for selectively connecting connection terminals for the control and the address signals with corresponding control and address lines.
Claim 10
Dependent Claim
35 words
The system as defined in claim 7, means defining a multiple arrangement for supply-, control signal- and address lines, said intermediate plug possessing different length plug pins which can be inserted into said multiple arrangement.
Claim 11
Dependent Claim
18 words
The system of claim 1 wherein said n address lines are operative to connect at least n(n-1)/2 rooms.
References Cited (Backward Citations)
US3215998A
Cited
US3147385A
Cited
US3228020A
Cited
US3631536A
Cited
US3594774A
Cited
US3588868A
Cited
US3675204A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |