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US 4,237,549 AGranted
Metronome
AssigneeRudolf Wittner GmbH u. Co.
InventorFriedrich Harle
Life of this patent
Estimating the term…
Abstract
A metronome is disclosed including a casing accommodating a driving device for a pendulum, the casing having an elongate trough-like body covered by a cover plate. The driving device is mounted on the inside of the cover plate. An imprinted scale plate associated with the pendulum is mounted on the outside of the cover plate. The pendulum is fixed on a shaft mounted in a bridge on the cover plate and driven by the driving device. Two screws fix both the bridge and a frame of the driving device to the cover plate. Holders integrally formed on the inside of the cover plate, at a location spaced above the fixing screws, engage with and retain the frame of the driving device. The scale plate can thus present a wide uninterrupted surface on which tempi and beat rates can be imprinted and related to each other.
Claims18
A metronome, comprising
- (a) an elongate trough-like casing (10) including three side walls, a bottom wall and a top wall, said walls being arranged to define a chamber;
- (b) a front cover plate (12) connected with said casing for closing said chamber;
- (c) pendulum driving means (16,26) arranged within said chamber;
- (d) a horizontal U-shaped pendulum bridge (30) extending transversely across said cover plate adjacent the front surface thereof;
- (e) a pair of spaced threaded devices (68) for simultaneously connecting both said bridge and said pendulum driving means in contiguous engagement with the front and rear surfaces of said cover plate, respectively;
- (f) a horizontal pendulum shaft (22) rotatably supported at one end by said bridge, said pendulum shaft extending rearwardly through an opening (28) contained in said cover plate and being rotatably supported at its outer end, said pendulum shaft being connected for driven movement by said driving means;
- (g) a vertical pendulum (24) non-rotatably mounted intermediate its ends on said shaft between said bridge and said cover plate;
- (h) a vertical imprinted scale plate (92) mounted on the outer surface of said cover plate adjacent said pendulum;
- and
- (i) holder means (74, 76) on the inside surface of said cover plate for engaging an edge portion of said pendulum driving means, said holder means cooperating with said pair of threaded devices to securely retain said driving means against the rear surface of said cover plate.
7 more elements
A metronome, comprising
- (a) an elongate trough-like casing (10) including three side walls, a bottom wall and a top wall, said walls being arranged to define a chamber;
- (b) a front cover plate (12) connected with said casing for closing said chamber;
- (c) pendulum driving means arranged within said chamber, said driving means including
- (1) a generally U-shaped frame (26) including a horizontal transverse portion parallel with and spaced from the rear surface of said cover plate, and a pair of horizontal limb portions (50,52) extending forwardly toward said cover plate, said limb portions terminating at their free ends in crank edge portions (54,56) adjacent the rear surface of said cover plate;
- and
- (2) pendulum drive motor means (16) mounted on said frame;
- (d) a horizontal U-shaped pendulum bridge (30) extending transversely across said cover plate adjacent the front surface thereof;
- (e) at least two threaded devices (68) for rigidly connecting said bridge and said pendulum driving means in contiguous engagement with the front and rear surfaces of said cover plate, respectively, said threaded devices extending through aligned openings contained in said bridge, said cover plate and said crank edge portions, respectively, the openings in said crank edge portions being threaded for engagement by said threaded devices, respectively;
- (f) a horizontal pendulum shaft (22) rotatably supported at one end by said bridge, said pendulum shaft extending rearwardly through an opening (28) contained in said cover plate and being rotatably supported at its other end, said pendulum shaft being connected for driven movement by said drive motor means;
- (g) a vertical pendulum (24) non-rotatably mounted intermediate its ends on said shaft between said bridge and said cover plate;
- (h) a vertical imprinted scale plate (92) mounted on the outer surface of said cover plate adjacent said pendulum;
- and
- (i) holder means (74) arranged on the inside of said cover plate at a location spaced from and threaded devices for cooperating with said threaded devices to connect said frame with the rear surface of said cover plate.
10 more elements
A metronome, comprising
- (a) an elongate trough-like casing (10) including three side walls, a bottom wall and a top wall, said walls being arranged to define a chamber;
- (b) a front cover plate (12) connected with said casing for closing said chamber, said cover plate including a recess (108);
- (c) pendulum driving means (16,26) arranged within said chamber;
- (d) a horizontal U-shaped pendulum bridge (30) extending transversely across said cover plate adjacent the front surface thereof, said bridge including projection feet (64, 66) which positively engage said cover plate recess, said bridge further including a bearing bore (110) conically enlarged at the front edge thereof, said bridge terminating at a spacing from the front end of said conically enlarged bearing bore;
- (e) a pair of spaced threaded devices (68) for simultaneously connecting both said bridge and said pendulum driving means in contiguous engagement with the front and rear surfaces of said cover plate, respectively;
- (f) a horizontal pendulum shaft (22) rotatably mounted at one end in said bridge bearing bore, said pendulum shaft extending rearwardly through an opening (28) contained in said cover plate and being rotatably supported at its other end, said pendulum shaft being connected for driven movement by said driving means;
- (g) a vertical pendulum (24) non-rotatably mounted intermediate its ends on said shaft between said bridge and said cover plate;
- (h) a vertical imprinted scale plate (92) mounted on the outer surface of said cover plate adjacent said pendulum;
- and
- (i) holder means (74, 76) on the inside surface of said cover plate for engaging an edge portion of said pendulum driving means, said holder means cooperating with said pair of threaded devices to securely retain said driving means against the rear surface of said cover plate.
7 more elements
Dependencies are inferred from the claim text.