US2742875A

US2742875A - Striking clock

Info

Publication number: US2742875A
Application number: US229672A
Authority: US
Inventors: Junghans Helmut; Jahn Paul
Original assignee: Individual
Current assignee: Individual
Priority date: 1950-06-05
Filing date: 1951-06-04
Publication date: 1956-04-24
Anticipated expiration: 1973-04-24

Description

April 1956 H. JUNGHANS ET AL STRIKING CLOCK Filed June 4, 1951 2,742,875 STRIKING CLOCK Helmut Junghans, schramberg sulgen, and Paul Jahn, Schramberg, Germany Application June 4, 1951, Serial No, 229,672. Claims priority, application Germany June 5,1950 5 Claims. (Cl. 116-169) The presentinvention relates to striking clocks.

striking clocks, the striking elements, for example, the

case, are substantially independent material composition.

chanical connection with the former. The diaphragm may cover an opening in a wall of the striker clock case, for example, in a side wall, but may be in any wall, or the top or bottom of the case. The reflection of sound by a diaphragm renders it possible for the striking clock striker clock casing.

For increasing the quality and intensity of the sound, it is possible to interpose, between the sound element and the diaphragm, means for increasing the amplitude, for example, a lever transmission.

In striker clocks having a tubular gong as the sound element, the gong block metallic material; finally, rubber bearings are also pos sible. As particularly advantageous for the purpose of an intensive and long-sounding pure tone-reproduction, the following arrangement may be used: The diaphragm 2,742,875 Patented Apr. 24, 1956 striker extends transversely, advantageously perpendicuor in the case of a coiled rod gong, normally and if of the diaphragm. In addition, bodiment of the invention, using a gong with straight gong rods, the gong block is suspended by means of a Further features and advantages of the invention will be apparent from the following description of one constructional example, from the drawing and the claims.

In the drawings,

Fig. 1 shows a front elevation of a gong arrangement with diaphragm in a wall clock,

I Fig. 2 is the arrangement according to Fig. I, seen from the side.

1 is the rear Wall and 2 is a side wall of a clock case, the remainder of which is not shown for the purpose of clarity. Secured to the rear wall 1, which may consist material and even of acoustically inert a point 5a where the two loops run together, is connected, by a rivet 6, with the securing angle plate 3, and at its ends 512, is connected by means of screws 7 to the gong block 4. Gong rods 8 are clamped in the gong block in known manner.

The striking hammer is indicated at 9 (Fig. 2), each of said gong rods 8 having a hammer associated there- With. The hammer shaft is represented at 10. The clock mechanism with the lifting arrangement for the hammers There is, of course, a hammer and its shaft for each gong rod.

The sound reflection is effected via a cone diaphragm 12, which is secured by the edge 12:: of the base thereof over the Wall opening 2a in the clock case wall. 12 is a rigid conical diaphragm which is known in connection with loud-speakers and made of compressed paper fibre or the like. By means of its point 121;, the diaphragm 12 is connected via a diaphragm rod 13 with an arm 40 of the gong block 4. The purpose of the arm 4a is to increase the amplitude of the diaphragm vibration.

It essentially adds to the reflection of the gong tones being effected with purity of tone and intensity in the embodiment illustrated if the diaphragm rod 13 is disposed perpendicular to the plane of the gong rods, and in the direction (11) of the striking of the hammers.

In order to prevent the diaphragm and the gong block suspension suffering damage during transport of the clock,

round bars or other sound elements, for example, bells, in conjunction with a sound-reflecting diaphragm. The use of the invention is not restricted to wall clocks with rectangular cases; it can also be employed with table clocks.

\Ve claim:

1. Sounding mechanism for striking clocks comprising a gong block carrying gong rods, a striking member for each gong rod, a lever arm rigidly secured to said gong block, a cone-shaped diaphragm, a rod connected to a top of the cone of the diaphragm and to the said lever arm, spring means for resiliently supporting the gong block with respect to the Wall of the casing of a clock, said spring means being shaped to allow vibrations of the gong striking member and additionally vibrations in a second direction.

2. Sounding mechanism for striking clocks comprising a gong block carrying gong rods, a striking member for each gong rod, a lever arm rigidly secured to said gong block, a cone-shaped diaphragm, a rod connected to a top of the cone of the diaphragm and to the said lever arm, spring means for resiliently supporting the gong block with respect to the wall of the casing of a clock, said spring means being shaped to allow vibrations of the gong block in the direction of the stroke of the striking member and additionally vibrations in a direction perpendicular thereto and to the gong rods.

3. Sounding mechanism for striking clocks according to claim 1, in which an angle plate is provided secured to block in the direction of the stroke of the a clock and in which the spring means comprises a pair of wire springs bent to loop form and secured to the angle plate and the gong block to suspend the block from the angle plate.

4. Sounding mechanism for striking clocks according to claim 1, in which an angle plate is provided secured to a clock and in which the spring means comprises a pair of wire springs bent to loop form and secured to the angle plate and the gong block to suspend the block from the angle plate, each wire spring forming a single loop in spiral configuration.

5. Sounding mechanism to claim 1, in which a case 18 in a wall thereof and the diaphragm is mounted adjacent the wall to cover the opening in the case.

for striking clocks according provided having an opening References Cited in the file of this patent UNITED STATES PATENTS