GB1319927A - Noise-producing devices for toy vehicles - Google Patents

Abstract

1319927 Toy vehicles W H MULLER [trading as SCHREYER & CO] 21 Dec 1971 [24 Dec 1970] 59258/71 Heading A6S [Also in Division G5] Noise making mechanism simulating engine noise in a toy vehicle comprises an electric motor for driving the mechanism, the circuit of the motor including a switch closed when a door of the vehicle is opened, and there being an adjuster to control the pitch of the noise produced. In the form shown, an electric motor 1 carries a driving friction wheel 3 engaged by a friction disk 8 at right angles to it, to rotate a holder 9 including clappers 11 engaged with a resonant surface 12. The motor 1 is energized by batteries 17 when a door of the toy vehicle is opened to close a switch 13. The motor 1 can be moved at right angles to the disk 8 to vary the gear ratio by a slider 4 moved against the biass of a spring 6: the slider 4 may simulate the accelerator pedal of the toy vehicle, varying the gear ratio changing the speed of rotation of the clapper holder 9 and thus the pitch of the emitted sound. In one modification, the variable ratio gear 3, 8 is omitted, and the motor 1 is instead powered from its batteries through an adjustable resistor (22, 23), Fig. 4 (not shown). In another modification, the door-operated switch is arranged with two contacts, one initially connecting the motor directly to the battery as the door is first opened and the other subsequently connecting the motor through a resistor as the door is further opened, Fig. 5 (not shown). Starting of the motor is thus facillitated. In yet another form, the motor drives the clapper holder at constant speed, and a resonant diaphragm having posts emitting sound of varying pitch is moved relatively to the clapper holder by a slide bar, Fig. 6 (not shown). In a further embodiment, a slide bar carries a contact which is successively engaged with contacts connected through a resistor to a single battery; directly to the single battery; and finally to two batteries in series, to vary the motor speed and hence the pitch of the emitted sound, Fig. 7 (not shown). In a final form, variation in pitch is provided by clappers (11), Fig. 8 (not shown) of two different sizes mounted in the holder, the distance between the clappers and the resonant surface being carried so that some or all of the clappers engage the surface.