摘要:
Pawl mechanisms for showing or indicating measurements of various orders of magnitude (e.g. seconds, minutes and hours) for applications such as for example electric clocks. Two basic embodiments are disclosed, the first (FIGS. 1-11) comprising a shift pawl working in conjunction with notched wheels and having pawl lugs extending therefrom in a number equal to that of the notched wheels and being staggered in depth with respect to one another. The notched wheels have both standard and extra-deep notches along their periphery, the frequency of occurrence of the latter being related to the magnitude relationship of the next upper order of magnitude (e.g. every 60th notch in the seconds there being 60 seconds in a minute wheel). Thus, as the lug of the pawl used for one given order of magnitude engages into the extra-deep notch of the wheel in conjunction with which it works and moves lower, the lug on the pawl used for the next upper order of magnitude engages the notced wheel with which it operates in such a way as to move it forward by one division. In a second embodiment (FIGS. 12-18), use is made of a plurality of pawls in a number equal to that of the notched wheels in conjunction with which they work. Each of the notch wheels (except for the highest order magnitude wheel) is provided with a pawl engaging cam profile which is made as an auxiliary cylindrical surface concentrically formed with the periphery of the notched wheel and is provided with a number of depressions related to the jump to the next upper order of magnitude. When the pawl element engages a depression, and is thereby allowed to move further downward, the pawl element also then engages the notched wheel of the next upper order of magnitude, moving it forward one division. In a first design (FIGS. 14-16), the concentric cylindrical surface is raised above the notched surfaces of the wheel and the lugs are of equal length; while in a second version (FIGS. 17 and 18) the concentric cylindrical surface is below the notched surface and the lugs are staggered in length.
摘要:
The invention provides an indicating device such as a clock which can be mounted in different types of motor vehicles. The device comprises a standard member in the form of a housing to which different closure members can be fitted to enable the device to be fitted in different vehicles. Preferably the housing contains the means for operating the device, such as a clock mechanism, and one closure member forms a dial. The closure member may contain indicating means such as clockhands and may be covered by a transparent shield.
摘要:
A measuring or indicating instrument in which the parts forming the transmission means are arranged between first and second parallel support plates, the said parts being functionally mounted in the radial direction solely by support members connected to one or the other of the support plates, and in the axial direction by both plates.
摘要:
THE INVENTION RELATES TO AN ELECTROMAGNETIC ACTUATING APPARATUS IN WHICH AN ARMATURE IS ATTACHED BY AN ELECTROMAGNET WHEN CURRENT IS SWITCHED ON. THIS KIND OF APPARATUS IS EMPLOYED FOR ACTUATING ELECTRIC SWITCHES, SUCH AS CLOCKWORK WINDERS OR THE LIKE. THE ARMATURE ROLLS UPON THE POLE PIECE IN A MANNER SO AS TO REDUCE NOISE OF OPERATION AND THE ARMATURE COMPRISES AN OPERATIVE ELECTRICAL CIRCUIT FROM A BATTERY TO THE ELCTROMAGNET THROUGH AT LEAST A PORTION OF THE APPARATUS.
摘要:
A pulse generating circuit, operative to produce a comparatively low frequency train of pulses or a sine wave for driving an electromechanical timing mechanism, comprises at least two quartz crystal oscillators having comparatively high output frequencies which differ from one another. The differing frequency oscillator outputs are supplied as inputs to a gate which, in turn, produces an output pulse whenever coincident pulses are supplied to its input. A comparatively low frequency signal is accordingly produced at the output of the gate without the need of conventional frequency dividers.