US857985A - Watchman's time-detector. - Google Patents

Description

PATENTED JUNE 25, 1907.

G. B. PBSSENDEN. WATCHMANS TIME DETECTOR.

APPLIoATIoN FILED sBPT.27,19o5.

wi tu @ons NITED STATES PATENT OFFICE.l

GEORGE B. FESSENDEN, OF ALLSTON, MASSACHUSETTS, ASSIGNOR TO ECO MAGNETO CLOCK COMPANY, OF BOSTON, MASSACHUSETTS, A CORPORA- TION OF MAINE.

Specification of Letters Patent.

Patented June 25, 1907.

Application led September 27, 1905. Serial No. 280,383.

.T @ZZ whom it may concern:

Be it known that I, GEORGE B. FEssEN- DEN, of Allston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Vatchmens Time-Detectors, of which the following is a specification.

This invention relates to portable clocks, or watches, for watchmens use of that type which makes a punched record such as is disclosed in Letters-Patent N o. 156,532, granted November 3, 187 4 to J. E. Buerk.

One of the objects of the invention is to provide a device of the character described which can be actuated only by a key made for a proprietary lock, 'Which will prevent others from using it.

Another object is to provide a device of this character having means for positively retracting the recording punch or marker.

Another object is to provide such a device .having the barrel of the lock in a space between two arms of the punching member, or marker, so as to render it impossible to operate a marker by any means or operation other than the use of a proper key. A device operating upon this principle possesses the advantage that the key must be turned back in order to bring the marker back into normal position, the said marker being restored without spring action.

In carrying out the invention, I employ a lock and key of the "paracentricI type, although I do not limit myself to this specific form. By employing a lock and key of the HYale type, a watchman, even if he were able to secure ablank, would find it impossible to cut the longitudinal grooves in the blank without the special machinery which the manufacturers employ 5 and the slightest difference in the groove, or a bur resulting from the use of a file would make it impossible to turn the lock. In the detector, as shown in the accompanying drawings, there is no spring to get out of order, and the motion of restoring the markers is positive. The turning of the key allows the marker to punch the paper dial, and the turning back of the key restores the marker to its proper position. The key can not be removed from the lock until the marker is in its normal position, resulting in bringing the needles or the markers firmly back to place.

Of the accompanying drawings,-Figure 1 is a plan view of a device embodying my invention, part of the cover, or backing, being broken away. Fig. 2 is a fragmentary plan, the paper dial and guide, or holder, being removed. Fig. 3 represents an elevation from the left of Fig. 1. Fig. 4 represents a section on line 4 4 of Fig. 1. Fig. 5 is a view, similar to a part of Fig. 4, 'with the key turned to raise a marker. Fig. 6 represents a section on line 6 6 of Fig. 4. Fig. 7 is a view, similar to Fig. 6, showing one of the markers raised by the action of a key. Fig. 8 is a view showing a plurality or set of keys which are used for actuating the lock and the markers or recorders. I

Similar reference characters indicate the same or similar parts throughout the views.

The case 10, having a cover or back 11 hinged thereto, as at 12, contains the casing 13 of a watch or clock movement. These parts are, or may be, of any well-known or preferred type, it being 'understood that the watch or clock dial, (not shown) is at the opposite face of the case from the cover 11. Mounted on the winding stem 14 is a holder 15 adapted to engage the center of the usual paper dial 16, which dial is printed or marked in the usual way for devices of this character.

The barrel of the lock is represented at 17. I have not attempted to illustrate the tumbler mechanism, but it is to be understood that the usual divided pin tumblers are employed, which will prevent the rotation of the barrel 17, excepting when the proper key is inserted to its full extent. As indicated in Fig. 8, the key has longitudinal grooves in its sides, which result in the key having a cross-sectional shape that will prevent any but the properly shaped key being inserted in the key-hole, the shape of the latter being indicated in Fig. 3. This form of key and lock is well-known, and need not be described further.

Suitably secured in the casing 10, at one side of the watch movement casing 13, is the frame 1S for the markers, or recorders. Said frame 18 and its base 19 are secured in the casing in any suitable way, as by rivets,

IOO

bolts, or screws. A pin 20 extends across the 'frame` 18 and serves as the pivot Jfor the markers or recorders 21. Each marker has an upper arm 21a and a lower arm 2lb, and is provided with a needle, or perforating point 22, which is adapted to punch the paper dial in the manner that will be presentlyT described. Above the frame 18 is a top plate 23, 'formed with a slot 24. A guide or holder 25 is secured to the top plate by a screw 26, and extends over the slot 241, the end of said guide, or holder, serving also as an indicator. The paper dial is rotated by the clock mechanism, and extends between the plate 23 and the guide or holder 25, the latter being serrated or 'formed with notches or depressions in line with the needles 22 of the markers, so that the paper will be held by the ribs of the holder between the recess while a needle is pressing against the paper and punching through it.

The barrel 17 of the lock is formed with a forward extension 27 said extension being cut away on one side and of a length to equal the width of the frame 18. Secured to said cutaway part is a plate or 'llat projection 28 adapted to bear upon the arm 21b of any marker that has been raised so as to throw said marker positively down when the barrel is turned Afrom the position shown in Fig. 7 to the position shown in Fig. 6. To limit the oscillatory movement oi the barrel 17 and its extension, so that the plate 28 will not move far enough to engage an arm 21a of a marker, I employ a suitable stop or abutment, such as a screw 29 mounted in one wall of the frame 18, and having its end projecting into the circular orifice formed to permit of the turning of the barrel 17 and extension 27, the end of the screw projecting so that one surface or the other of the cutaway part will engage the end of the screw, as clearly indicated in Figs. 6 and 7.

The paracentric key 30 is formed with the usual serrated edge portion 31 to engage the usual divided tumbler pins so that their abutting portions may be brought into alinement, in the usual manner, to permit the barrel to be rotated by the key. The back of' the key is cut away so as to form a projection 32, leaving an end lug or projection 33. Of course, the position oi the ward 32, lengthwise of the recess from which is rises, will vary in different keys. The total width of the recess 'formed in the back of the key will equal the space between the two walls or plates forming the frame 18, so that when the parts are assembled as indicated in Fig. 5, the arms 212L of all of the markers 21 will just iill up the said recess when the key is turned. One marker, however, as the key is turned, will be raised by the ward 32 of the key employed. When the key has been turned to the position shown in Fig. 5, it can not be withdrawn because the end lug, or projection, 33 willbe inside of the innermost marker. This end lug is not an absolute necessity, however, because the usual tumblers of the lock will prevent the key from being withdrawn, excepting when in the position shown in Figs. 3 and 6. Of course, the number of keys may bc greatly varied. If there areI ten markers, there can be ten keys, each having but one projection 32, but this number can be greatly increased by adding other keys with two or more projections dii'lerently spaced.

As is usual with such devices, the clock case is provided with afresh paper dial, and is locked up and then the watchman carries it with him to the diiiierent stations at each of which one key is secured by the usual chain, or other means, so that it can not be carried away, and so that the watchman must carry the clock successively to the di'l'l'erent keys at the dii'lerent stations so as to use the key properly to actuate the markers. This method of use is well-known, and requires no further description.

It will be seen that by providing a structure in which the markers, or indicators,

must all be positively retracted to normal' position by the operation of the key, it is impossible to take thev clock away from the station until the key at that particular station has been properly turned back and withdrawn, and as long as there is no key in the lock, the markers, or indicators, are absolutely and iirmly locked against any sort of operation. This is because the plate or projection 28 holds all of the indicators down, and said plate 28 is carried by the lock barrel which can only be turned by the proper key, or keys, successively; and as keys to operate the lock can only be obtained from the manufacturers, an agreement with such manufacturers as to the 'furnishing of such locks and keys will absolutely guard against anypossibility-oi tampering with the device, or improperly operating it.

Having now described my invention, I claim 1. The combination with a watchmans time detector having a plurality of markers or recorders and a rotatable barrel having tumbler pins, of a plurality 0r set of keys, all of the keys being similarly irregular in cross section from end to end and having similar edge serrations to actuate said tumbler pins, and each key having an edge projection beyond the said serrations to actuate a marker or recorder, the projection of each key d iiilering from that or all of the other keys of the set in distance 'from the serrations.

2. A watchmans time detector comprising in its construction a plurality of markers or recorders, each having two arms,a barrel extending through the space between the arms of the markers, means for normally locking IOO IIO

said barrel against rotation, and means whereby the turning of the barrel in one direction will positively retract the markers.

3, A device of the character described comprising a plurality of pivoted markers or recorders, a barrel having an extension to engage said markers, means for normally lock ing said barrel against rotation, said eXtension being constructed to the depress the markers.

4. A device of the character described comprising a plurality of pivoted markers, each having two arms, a barrel having an extension projecting through the space between the arms of the markers, means for normally locking said barrel against rotation, means carried by said extension 'for positively depressing the markers, and a stop 'for limiting the rotation ol' the barrel.

5. A device of the character described comprising in its construction a plurality of recessed pivoted markers, a lock barrel having a cylindrical portion and formed with an extension which is cut away, said extension being located in the recesses of the markers, a plate secured to the cutaway portion ofthe lock barrel and projecting radially therefrom,

said plate being adapted to engage one side of the recesses of the markers to depress them, and a stop to limit rotation ofthe barrel.

6. In a watchmans time detector, the combination with a barrel having an eXtension, of a plurality of pivoted recorders actuated by said extension, and a key adapted to ht said barrel and project beyond the same, said key having a serrated edge portion to engage tumblers in said barrel and.

having another edge portion provided with a recorder-actuating projection.

7. lin a watchmans time detector, the combination with a plurality of markers or recorders, of a barrel having an extension to actuate said markers or recorders, said barrel having a slot for a key, and a key having one edge portion lformed to actuatev lock tumblers in said barrel and another edge portion to actuate one of the recorders.

In testimony whereof I have aliixed my signature, in presence of two witnesses.

A GEORGE B. FESSENDEN. l/Vitnesses:

A. W. HARRISON,

C. F. BROWN.

Images