Pennwalt Corporation

Rtom Corporation

The Whitaker Corporation

Pharmacopeia Inc.

Atochem North America, Inc.

Gastgeb, Raymond F.

Rogers, Thomas P.

Raymond F Gastgeb

Thomas P Rogers

Edward Tom

Ilya Feygin

Kyung-Tae Park

Thomas John Rogers

Jeffrey Bruce Davidson

A practice drumhead assembly including a mesh membrane held in substantially fixed relation to an acoustic membrane. The assembly preferably includes an annular tensioning ring for tensioning the mesh membrane, and an engagement member for substantially fixing the mesh membrane relative to the acoustic membrane. The tensioning ring includes a cylindrical rod with a turnbuckle that is rotated to increase the diameter of the tensioning ring.

Practice drumhead assembly

A drumhead assembly comprising a drumhead membrane fixed within an annular ring and a tensioning ring for tensioning the membrane, located within the annular ring and against the drumhead membrane, comprising a cylindrical rod formed in a circular, flat configuration and a tensioning member for maintaining the tensioning ring in a pre-tensioned configuration. The tensioning member can be adjustable, as in the form of a turnbuckle, so as to vary the diameter of the tensioning ring, or fixed, as in the form of a spacer, so as to maintain the tensioning ring at a predetermined diameter.

Drumhead assembly

An agitator capable of generating complex mixing motions is described. In some embodiments, an agitator in accordance with the present teachings includes a movable assembly that is suspended, via several resilient supports, from a frame. The movable assembly receives a vessel containing a material(s) to be agitated. The movable assembly advantageously includes spaced upper and lower plates having a rotatably-supported member disposed therebetween. The mass of the rotatably-supported member is asymmetrically distributed about its rotational axis. A drive force, such as a directed air flow, which may be used in conjunction with a belt drive mechanism, causes the rotatably-supported member to rotate. Due to the asymmetric mass distribution of the rotatably-supported member, force is non-uniformly applied to resilient supports such that, at any given time, some of such resilient supports are subjected to a compressive force while other resilient supports are placed under tension. The particular resilient supports that are subjected to the compressive force change as a function of the rotation of the rotatably-supported member, thereby placing the movable assembly in orbital motion and agitating the material(s) within the vessel disposed thereon.

Agitator for orbital agitation

A device for determining which zone on a target has been struck by an object. The device is made of a frame, and a flexible support means which is mounted on the frame, and is disposed in the path of a moving object. A transducer made of piezoelectric film, coated with a conductive coating on each of its surfaces to form electrodes, is mounted on the flexible surface. Attached to the electrodes of the transducer are leads which transmit electrical pulses to a signal processing unit. An object striking the target produces an electrical pulse which is translated by the signal processing unit and which determines the zone on the target which was struck by the object.

Impact zone detection device

A piezo film switch comprises a cantilever with a pair of layers, including a piezo film layer and a flexible, backing layer laminated thereto. The piezo film layer produces a positive or negative output pulse, depending upon a direction of deflection of the cantilever. Interface circuitry coupled to the piezo film layer is powered by the output pulses and provides 'pseudo contact closures' which emulate the operation of a mechanical switch.

Dual direction switch

An amusement device is disclosed which contains a signal generator attached to a flexible member. When the flexible member is repeatedly waved, an oscillatory electrical signal is produced by the signal generator and supplied to a sound generator which produces sound which synchronously varies with the repeated flexure of the member caused by the waving action. The sound generator produces a first tone with respect to the oscillatory electrical signal and a second tone when the frequency of the oscillatory electrical signal exceeds a predetermined value.

Synchronized sound producing amusement device

A sensing device is disclosed which produces a response when the point of impact between an object and a member occurs at a preselected location on the member. When the member vibrates after being impacted by the object, an oscillatory electrical signal is produced by a piezoelectric sensor. Appropriate circuitry is provided for analyzing the oscillatory electrical signal and for producing a response if the object impacted the member at the preselected location. The sensing apparatus is particularly useful in athletics for determining whether a game object contacted the athletic instrument at its 'sweet spot'.

Vibration sensing apparatus

A structural member having a piezoelectric transmitter film and a piezoelectric receiver film adhered thereto. The transmitter film produces a vibration upon activation by a voltage controlled oscillator which forms part of a phase-lock loop circuit. The vibrations of the structural member generate electric signals on the receiver film, which feed into a phase comparator. The other input of the phase comparator is the output signal of the voltage controlled oscillator. The phase comparator will output a dc signal proportional to the difference in phase between the two signals. When the structural member becomes damped, the phase comparator will go into saturation, thereby producing a voltage which can activate an alarm signal or other device.

Growing community of inventors

Doylestown, PA, United States of America

Raymond F Gastgeb