Patient care timer

• US 4,225,852 A
• Filed: 02/06/1978
• Issued: 09/30/1980
• Est. Priority Date: 02/06/1978
• Status: Expired due to Term

• Current Assignee: Long E. Shirley, Ronald L. Waters, Thomas F. Brown, Thomas J. Grady
• Original Assignee: Long E. Shirley, Ronald L. Waters, Thomas F. Brown, Thomas J. Grady
• Inventors: Brown, Thomas F., Waters, Ronald L., Long, E. Shirley, Grady, Thomas J.
• Primary Examiner(s): Pitts, Harold I.
• Application Number:
  US05/875,149
• Time in Patent Office: 967 Days
• Field of Search: 340/286 R, 340/327, 340/309.1
• US Class Current: 340/286.07
• CPC Class Codes: G08B 5/36 using visible light sources

Abstract

A resettable timer conformed as an interface assembly between a nurse call button and the wall jack therefor, including a D.C. power supply driving a timing circuit which closes a switch in parallel with the call button at the completion of a predetermined interval of time. The arrangement of this timing circuit into an interface stage received in the jack at the patients bedside requires that the nurse visit the patient in order to effect a reset. Thus the nurses call signal will remain on in an indistinguishable manner from an emergency signal, calling for response which can only be corrected by a visit to the patient'"'"'s room.

Claims

1. In a medical care facility including designated areas for the care of patients;

a monitoring station for receiving signals enabled by said patients and signal generating means deployed proximate each said patient, said signal generating means including a plurality of signal lines each extending from said monitoring station to a corresponding wall jack proximate said patients a corresponding plurality of manually operable call switches each adapted for manipulation by said patients, and a corresponding plurality of connectors deployed from the respective ones of said call buttons for insertion into said wall jacks, the improvement comprising;

a resettable timer assembly including a plug adapted for insertion into said wall jack and provided with a receptacle in circuit with said plug for receiving said connector, said timer assembly including exciting means for producing electrical excitation, timing means connected to said exciting means for producing a timing signal a predetermined period of time after the receipt of said electrical excitation, manually operable resetting means connected to said timing means for restarting said timing means after said timing signal is produced thereby and for disabling said timing signal for yet another said predetermined period of time, and switch means connected across said receptacle rendered closed by said timing signal.

2. Apparatus according to claim 1 wherein:

said timer assembly is conformed for deployment proximate said wall jack; and

said manually operable resetting means includes a pushbutton switch deployed on the exterior of said timer assembly.

3. Apparatus according to claim 2 wherein:

said switch means includes a normally open set of contacts connected across said receptacle and a winding connected to receive said timing signal for electromagnetically closing said set of contacts.

4. Apparatus according to claim 3 wherein:

said timing means includes an oscillator rendered operative by said electrical excitation, a counter connected to said oscillator for producing a series of count signals indicative of the accumulated count of the oscillations from said oscillator, said counter including a disable and hold segment connected to a preselected one of said count signals for disabling said counter, and an enable segment connected to said resetting means for resetting said disable and hold segment and said counter upon the manual operation of said resetting means.

5. Apparatus according to claim 4 wherein:

said switch means is arranged for parallel operation with said call button.

6. Apparatus according to claim 5 wherein:

said timing assembly is removeably deployed in said wall jack.