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US 5,487,320 AGranted
Drum and drum gauge
OwnerMarcus De Mowbrayinventor
Life of this patent
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OwnerMarcus De Mowbrayinventor
Estimating the term…
A drum and drum gauge have a head supported on a cylindrical shell which is open at its bottom and provided with tensioning bolts for tensioning the head to tune the drum. The drum shell is detachably connected to a stand. The stand can be easily folded to a closed position for ease of transport. The tuning part of the drum comprises a plurality of arms extending substantially horizontally and radially from a tension bolt at one end, through a bushing in the shell, to a central operating rod at the other. Upward movement of the central rod moves the tension bolts downwards, with a lever action, increasing the tension of the drum head. The lower end of the central rod is attached to a foot lever pivotable about a horizontal access and carrying a pedal for applying a brake. A gauge for indicating the drum's pitch has a fixed scale and a movable indicator coupled to the foot lever by a sheathed cable. Alternatively, the gauge has a fixed indicator and a scale pivotally fixed to the drum shell coupled to the foot lever by a rigid rod.
A timpano type drum having a head, a cylindrical shell attached to and extending downwardly from the head, the shell having an open bottom, a plurality of tension bolts attached to the head, the drum head and shell being symmetrical about a drum axis, a stand which is movable between a folded relatively flat condition and an erect three dimensional support position in which it is adapted to be connected to and support the shell and head with the drum axis substantially vertical, fastening means for attaching and detaching the stand to and from the shell, foot operated tuning means having an upper part fixed to the shell and to the tension bolts, and a lower part fixed to the stand, and coupling means for detachably coupling the upper and lower parts together in the erect condition of the stand with the head and shell supported thereon, such that movement of the lower part of the tuning means will adjust the tuning of the head via the tension bolts.
A drum having a head, a plurality of tension bolts connected to the head for tensioning the head, a shell connected to the head and extending downwardly therefrom and having an open bottom, the head and shell being symmetrical about a drum axis, a foot operating tuning means arranged for tuning the head via the tension bolts, in which the tuning means comprises a plurality of substantially horizontally and radially extending arms located within the depth of the shell, the arms having outer ends effectively connected to respective ones of the tension bolts and inner ends adjacent one another and arranged to be operated on by a common operating rod substantially on the drum axis, the arrangement being such that movement of this central rod upwards moves the tension bolts downwards by a lever action to increase the tension on the drum head, and foot operated means for moving the common operating rod.
In combination a drum having a moveable tuning means and a gauge for indicating how the drum is tuned comprising a scale member having a curved side with indicating members spaced therealong, pivotable mounting means mounting the scale member to the drum, so that the scale member can move against a fixed indicator substantially aligned with the pivotable mounting means, a rigid rod external of the drum, and a substantially universal connection joint at each end of the rod detachably connecting the rod between the tuning member and the scale member.
Dependencies are inferred from the claim text.