Patents Assigned to Fred M. Schildwachter & Sons, Inc.
-
Patent number: 5748074Abstract: A circuit for actuating a door chime has a dc power source in series with a resistor and in shunt with a capacitor. A remote push button transmits a radio signal to the circuit, to connect a solenoid in series with the power source and the resistor and in shunt with the capacitor, which causes a relatively large pulse of current from the instantaneous combination of the power source current and the current from the charge of the capacitor to be applied to the solenoid which is arranged to strike a tone bar. The resistor in series with the capacitor has a time constant that charges the capacitor adequately between cycles of the operation of the push button and the resistance of the resistor limits the current flow from the power source.Type: GrantFiled: November 12, 1996Date of Patent: May 5, 1998Assignee: Fred M. Schildwachter & Sons, Inc.Inventor: Marc Chomet
-
Patent number: 5638047Abstract: A remote annunciator system in which the emission of an acoustic signal by a first annunciator is detected by an acoustic signal detector which causes a radio frequency transmitter to transmit a radio frequency signal. A radio frequency receiver which receives the signal operates a second annunciator which is remote from the first annunciator, to cause the second annunciator to emit an audible or visual signal. Preferably, the radio frequency signal is encoded and is decoded at the receiver, and if the first annunciator can emit two different accoustic signals, the transmitted signal is encoded dependent upon which acoustic signal is emitted and the receiver decoder causes the second annunciator to emit an audible signal or a visual signal which depends on the transmitted signal encoding.Type: GrantFiled: May 10, 1995Date of Patent: June 10, 1997Assignee: Fred M. Schildwachter & Sons, Inc.Inventors: Leslie M. Orloff, Gary Paley, David T. Waugh
-
Patent number: 5576690Abstract: Push button controlled wireless transmitters send digitally encoded signals to a plug-in receiver/signaling device. The receiver/signaling device has a microprocessor suitably programmed to respond to signals from a transmitter bearing the discrete address of the receiver, and to decode a transmitter identification code. Thereupon the microprocessor supplies an audio output circuit with signals to simulate selectively mechanical front or back door chimes, and supplies signals to energize a strobe lamp to emit bursts of multiple flashes, the number of flashes in a burst identifying the specific transmitter, whereby a person with a hearing deficiency is informed as to which transmitter is being actuated.Type: GrantFiled: August 7, 1995Date of Patent: November 19, 1996Assignee: Fred M. Schildwachter & Sons, Inc.Inventors: David Waugh, Leslie M. Orloff
-
Patent number: 5420564Abstract: Door chime assembly includes a chime base having a rear plate and at least one resonance chamber secured to said rear plate, a tone bar within the chamber and a striking means mounted on the plate for striking the tone bar. The chime base is molded in a single piece and employs at least one living hinge which permits folding of parts of the assembly to form the resonance chamber. The tone bar is mounted on dowels in the chamber of a length which prevents the tone bar from falling off the dowels during transit.Type: GrantFiled: July 14, 1993Date of Patent: May 30, 1995Assignee: Fred M. Schildwachter & Sons, Inc.Inventor: Duncan Remington
-
Patent number: 5392202Abstract: An illuminated electrical push button switch has a pair of spring contacts secured in a plug-like body on either side of a miniature bulb. A flat top, metallic cup-shape, push button overlies the contacts, insulated therefrom by a sheet of electrical insulating material. The push button has a plurality of circumferentially spaced radially projecting fingers. A cylindrical shell with a radially inwardly directed flange fits over the plug-like body with a snug fit with the flange overlying the fingers of the push button to secure the push button to the body. A plurality of circumferentially spaced notches in the flange of the shell provide openings through which light emanating from the lamp can escape. The entire assembly has a low profile and is mounted by means of an adhesive. The assembly can be mounted directly on the building structure or it can be mounted with a decorative plate or the like interposed between the building and push button assembly.Type: GrantFiled: May 13, 1994Date of Patent: February 21, 1995Assignee: Fred M. Schildwachter & Sons, Inc.Inventor: William L. Herron
-
Patent number: D380167Type: GrantFiled: July 26, 1996Date of Patent: June 24, 1997Assignee: Fred M. Schildwachter & Sons, Inc.Inventor: Thomas J. Ryan
-
Patent number: D381594Type: GrantFiled: July 26, 1996Date of Patent: July 29, 1997Assignee: Fred M. Schildwachter & Sons, Inc.Inventor: Thomas J. Ryan
-
Patent number: D382502Type: GrantFiled: July 26, 1996Date of Patent: August 19, 1997Assignee: Fred M. Schildwachter & Sons, Inc.Inventor: Thomas J. Ryan
-
Patent number: D391514Type: GrantFiled: July 14, 1997Date of Patent: March 3, 1998Assignee: Fred. M. Schildwachter & Sons, Inc.Inventor: Thomas J. Ryan
-
Patent number: D406110Type: GrantFiled: December 17, 1997Date of Patent: February 23, 1999Assignee: Fred M. Schildwachter & Sons Inc.Inventor: Thomas J. Ryan
-
Patent number: D410436Type: GrantFiled: March 30, 1998Date of Patent: June 1, 1999Assignee: Fred M. Schildwachter & Sons, Inc.Inventors: Thomas J. Ryan, David T. Waugh