US2083816A - Electric delayed combination lock - Google Patents

Description

June 15, 1937. w. T. BENHAM 2,033,816

ELECTRIC DELAYED COMBINATION LOCK Filed April v, 1956 2 Sheets-Sheet 1 WIYI/ 'am IBM/mm W. T. BENHAM ELECTRIC DELAYED COMBINATION LOCK June 15, 1937.

Filed April 7; 1936 2 Sheets-Sheet 2 W/llfam 7T Bem mm Patented June 15, 1937 ilNi'iii ear 1;;

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ELECTRIC DELAYED COMBINATION LOCK Application April 7, 1936, Serial No. 73,134

13 Claims.

The present invention relates to looks for safe, money depositories, etc. and particularly to delayed opening locks.

An object of the invention is to provide a relatively inexpensive device comprising a combination lock having cooperative relation with a time delay mechanism which is operable according to prescribed operation of the combination lock so that authorized users may have a safe or the like under the control of a combination lock and at the same time selectively obtain the presently necessary anti-bandit protection and the well known time lock protection for long periods.

It is a further object of the invention to efiect a unitary combination of combination lock mechanism and electric time lock mechanism which will utilize a simple auxiliary means for converting the same at will into a device having the characteristics of the ordinary selective long delay interval time lock.

Another object of the invention is to provide an electric delay combination lock utilizing a constantly operating low voltage synchronous motor so that the device is at all times in condition to be locked either as an anti-bandit lock or as a normal time look without the necessity of attention to switches or other conditioning means.

Another object of the invention is to provide a very simple and compact locking mechanism that is under the direct control of a combination lock and which is under the automatic control of an electric time lock assuring a predetermined minimum of anti-bandit delayed opening and to provide an extremely simple adjunct mechanism whereby the automatic anti-bandit delayed opening is deferred or prolonged according to selected setting in order to provide the usual time lock protection over the night season or holiday season.

Another object is to provide an electric time lock requiring the setting up of a combination lock to its combination to one mark in order to 4.3 initiate actuation of the electric time delay mechanism and the Waiting for the lapse of the predetermined time interval, following which the same combination is required to be set up on the combination look but to a different mark in 51 order to throw the bolt, failing which the effect of the initial actuation is nullified.

These and other objects are attained by the means described herein and disclosed in the accompanying drawings, in which:

Fig. l is a rear elevational view of the lock with the anti-bandit time delay mechanism, parts, including the entire synchronous motor, being broken away.

Fig. 2 is a top plan view of the device of Fig. 1.

Fig. 3 is an elevational View taken from the left hand side of Fig. 2 but showing the motor in position. 7

Fig. l is a view taken on line i-4 of Fig. 2.

Fig. 5 is a fragmental view of a clutch wheel forming part of the invention.

Fig. 6 is a side elevational view of said clutch Wheel.

Fig. '7 is an enlarged fragmental view showing a control pawl forming part of the invention, in the position assumed upon initial operation of the combination lock.

Fig. 8 is a rear elevational View of the device of Fig. 1 having cooperatively associated therewith the mechanism whereby extended time delays are imparted to the operation of the device.

Fig. 9 is an enlarged rear elevational view of the selective delay interval mechanism, part being broken away.

Fig. 10 is a view taken on line lfl-lfi of Fig. 9.

Fig. 11 is a view taken on line i l-il of Fig. 10 showing the device of Fig. 9 operatively controlling the anti-bandit combination lock.

Fig. 12 is a view similar to Fig. ll but with the device in inoperative position.

The lock of the present invention includes a combination lock that is arranged to be set up to two different markings disposed on diametrically opposite sides of the dial and to require that the combination be set up to the first of these markings in order to clutch in on a continuously operating synchronous motor driven mechanism constituting part of an anti-bandit or short interval delay mechanism and to thereafter require the authorized operator to wait for the predetermined short interval before the combination can be again set up to the second marking for throwing the bolt. The invention further includes a simple accessory mechanism that is selectively set to nullify the initial short delay interval by extending or prolonging it by multiples thereof up to the largest time delay interval normally required of time locks of whatsoever description. The device of the invention is constituted essentially by a constantly operating synchronous electric motor, a means controlled by a combination lock to engage the clutch controlled delay interval mechanism with the motor, a bolt mechanism actuated by the combination look after conditioning and predetermined operation of the delay interval mechanism, and a simple ratchet type auxiliary mechanism for controlling the anti-bandit protection period up to any arbitrary maximum delay period. The latter auxiliary mechanism is of such nature that the device may be used without it and serve as a highly efficient combination lock control antibandit lock or said auxiliary mechanism may be associated therewith and quickly rendered inoperative or operative to selected delay intervals.

The device of the invention preferably employs a self-starting synchronous electric motor operating on low voltage, e. g., 24: volts, and supplied through a step-down transformer from ordinary house current supply means and it is considered within the scope of this invention that the electric supply to said motor be optionally made inaccessible so that if desired the actuating current can be shut off by a key-controlled electric switch remotely disposed.

Inasmuch as no signal or informing means are normally associated with the device of the invention, it is necessary, in order to open the safe or other structure controlled by this look mechanism, that the authorized operator shall know the combination which must be initially set up and he must also know and watch the time delay interval which permits actuation of the bolt upon the second setting up of the combination. The operator must also know the ensuing period during which the second combination may be set up to throw the bolt. This arrangement coupled with the auxiliary extended delay mechanism which is easily and feasibly set up and adjusted from the interior of the door affords a most cornplete protection throughout the day and night season.

Referring now to the drawings: The device comprises a back plate 211 having a shelf portion 2! extending therefrom, the back plate being adapted to be secured to the door 22 of a safe or money chest in any approved fashion. At one side of the back plate is a slotted frame 23 in which the lock bolt 24 is reciprocably mounted. The combination lock indicated generally at 25 is mounted on the slotted frame 23 and has the arbor 26 extending through the aperture 21 in the bolt 24. The bolt 24 is thrown by means of pivoted lever 28 engaging in the notch 29 and can be actuated when the tumbler slots in tumblers 3| are set up in alignment according to a predetermined combination to admit gate member 32 which has a pin 33 extending through an arcuate slot 34 and into the aperture 35 in the pivoted lever 28. With the combination thus properly set up the delay knob 36 can be turned to throw the bolt 24.

The bolt 24, however, has an extension 31 which is normally held against opening move ment by the periphery 38 of a check disc 39 having a cut-away portion bounded by the faces 40 and 4| so that the check disc must be moved to a position approximating that shown in Fig. 4 in order to effect opening movement of the bolt.

The check disc 39 is mounted. on a shaft 42 in side by side relation with a clutch disc 43, both of said discs being capable of remaining stationary while the shaft rotates. A spring 44 having its opposite ends anchored to the discs 39 and 43, respectively, permits of limited relative motion of said discs and serves to build up sufficient pressure, when the face 4| of the check disc is against the retracted extension 3'5 of the bolt, to move the aperture in the check disc beyond said extension 3'! whenever the bolt is moved from open to locked position.

The clutch disc 43 has a slot 45 in which is pivoted an arcuate clutch lever having a toothed segment 4? extending through the slot in the side thereof. The end 48 of the lever 46 normally projects outwardly adjacent the periphery of the clutch disc and is visible in the notch 49 in the clutch disc. Spring means 50 urge the clutch lever to the latter mentioned position as may be seen in Fig. l. From the foregoing, it will be seen that the toothed segment 4? of the clutch member is normally urged radially inwardly toward the shaft. This toothed extension 4? meshes with a toothed wheel 5i Which is secured to or integral with gear 52 which is driven through intermediate reversing gearing 53 by the motor pinion 54 which is carried by the shaft of the synchronous motor indicated generally at 55. Motor 55 is preferably of the low voltage type now available, e. g., 24 volt self-staring synchronous motor, and is supplied with current through a step-down transformer 56 which may be supplied from ordinary house current source with a remote key-controlled switch 5'! optionally in the circuit.

Under normal circumstances, the motor 55 operates continuously, thereby continuously driving the gear 52 and toothed wheel 5!. When the lever 46 is held in the inoperative position shown in Fig. 5, discs 39 and 43 remain at rest. A pawl 53 pivoted as at 59 has a finger 68 which enters the notch 49 in the clutch disc and depresses the end 48 of lever 46 thereby holding the toothed segment 4? out of engagement with toothed wheel 5i rendering the clutch disc inoperative.

When the finger 63 on pawl 58 is removed from the notch 49, a segment 4? meshes with toothed wheel 5i and slowly rotates the clutch disc 43 and check disc 39 as a unit. The gear ratio in the drive mechanism is preferably arranged so that approximately fifteen minutes are required before the leading edge of the aperture in the check disc passes beyond the extension 3? on pawl 24. When this interval has elapsed and the aperture in the check disc is positioned as shown in Fig. 4, the bolt may be moved to open position. The clutch, however, remains engaged and the clutch disc and check disc continue to rotate until the trailing edge 4! of the aperture in the check disc abuts the retracted extension of the bolt whereupon the check disc is brought to rest while the clutch disc continues to rotate for a distance, loading the spring 44 until the finger 658 on bolt 58 which has meanwhile ridden on the uninterrupted portion of the periphery of the check disc enters notch 49 and presses the end 48 of lever 46, thereby disengaging the clutch and bringing the said discs to rest with spring 44 loaded.

As best illustrated in Figs. 1, 2, 3, and 7, the control pawl 58 has associated with its upper end a set and trip mechanism consisting essentially of a pivoted arm 6! urged by a spring 62 in a counter-clockwise direction and having projecting from the rear face thereof a pin 63 that engages the upper pointed end E4 of pawl 53 when the device is in inoperative position. Pawl 58 is urged by coil spring 65 to turn clockwise on its pivot, hence the function of the trip mechanism is to hold pawl 53 in such position that the finger 69 thereof normally enters notch 49 and holds the clutch lever out of engagement while the device is inoperative.

The function of members 58 and BI is to coniii.)

trolledly release the clutch to operative position and to again condition the disabling means to automatically assume a position for throwing out the clutch after predetermined operation.

In the position shown in Fig. '7, a pin 64 on arm BI assists in holding the finger 60 of pawl 58 in the notch 69 thereby disengaging the clutch disc and holding it in a position of rest. When this is tripped by bodily withdrawal of the finger 60, the arm iii is tripped and pin 63 is released to the position shown in Fig. 1 holding the pawl 58 out of contact with the clutch disc and the end of the clutch lever so that the check disc and clutch now rotate under the power of the constantly running motor and gearing. The pin 66 in the check disc is now moving in the path of the extension iii of arm 8| and after a short interval trips said arms so that the pin 6| is under the mild pressure of spring 82 and urges the pawl 58 in a clockwise direction and the finger 68 rides lightly on the uninterrupted periphery of the clutch disc, ready to enter notch 49 and engage the end 48 of the clutch lever after the predetermined time interval.

To initiate this action the combination lock is first set up to its prescribed combination at the mark 68 adjacent the dial. This allows gate 89 to drop into the aligned tumbler slots 30. When the dial is now urged to move tumblers 3i in a clockwise direction as viewed from. Fig. 1, a pin 'Iil engages a lug 'II on pawl 58 whereby the pawl is moved and the clutch 48 is released to operatively engage toothed wheel 5|.

After the check disc 38 has slowly turned for the anti-bandit delay interval of say fifteen minutes, the combination lock must be again set up to the second mark I2 which is preferably diametrically opposed to mark 68 at the periphery of the dial. This must be done within a relatively short period of say three minutes in order to be able to withdraw the bolt from its keeper into the aperture between the faces 48 and 4| of the check disc to unlock the door. If this short period elapses without the combination and bolt having been so operated, the check disc again presents its periphery to the end 3'! of the bolt 2t and the safe remains locked. In this event the finger 68 enters the notch 49 and throws out clutch 48 as previously described.

The wiring to transformer 46 is preferably concealed. The wiring from said transformer to motor 55 is by way of conductors I3 and I4 which may either pass through the inside of the vault or money chest with perfect safety or they may be entered from the exterior of the door if desired as is diagrammatically suggested in Fig. 2. It will be appreciated that severing the conductors or cutting the switch 51 makes it impossible to operate the lock.

The structure thus far described serves as a fool-proof anti-bandit combination lock which requires a knowledge on the part of the authorized user of the delay interval and the operating interval for opening the safe or money chest to which the lock is attached.

The hereinafter simple and inexpensive auxiliary mechanism may be added to the lock just described without altering its anti-bandit functionand at the same time it will enable the user to disable the clutch operating means for any desired delay interval such as would be required for night and holiday protection. After such operation the lock may at any time be operated, and. after waiting the lapse of the anti-bandit delay period, may be opened in the aforedescribed manner. This mechanism consists essentially of a lug I5 carried on the face of the gear 52 which engages and actuates a step by step toothed wheel and ratchet mechanism. once in aproximately twenty minutes and a means to set said ratchet mechanism so that after a predetermined delay interval the bar member 76 is withdrawn from a position in the aperture TI which is formed by the toothed portion 4? of the clutch lever and the slot 44 in the clutch disc.

Referring now to the drawings, Figs. 8 to 12, inclusive, the adjustable interval device comprises a back frame I8 adapted to be secured upon the inner face of the safe door with the edge I9 thereof in abutment with the edge 80 of the lock mechanism whereby the bar I8 projects through a suitable aperture in the adjacent side of the cover case BI of the lock mechanism and has its end disposed in such position that it can be projected into the space between the disengaged clutch segment 41 and the adjacent portion of the clutch wheel 43. Between the frame member I8 and front frame 82 a short shaft 83 is suitably journalled and carries fixedly or integral therewith a toothed wheel 84 and an elongated pinion 65. Intermediate pinion 86 meshes with pinion 85 and with the toothed periphery iii of a graduated indicator wheel 88. The indicator wheel 88 has a coil spring 89 which may be tensioned sufficiently to preclude slippage thereof through the pinion train just described relative to a pawl 98 which is spring urged by member 9! to seat between the teeth of toothed wheel 84. The bar I6 is reciprocable in guide 92 and has the pawl 98 pivoted thereon.

An independently reciprocable U-shaped yoke comprising arms 93 and 9% is slidably mounted in guides 95 and 96, the arm 94 carrying an anti-friction roller 91 which in the projected position of said yoke is adapted to be engaged by the lug E5 on gear wheel 52 in the look. This yoke has a notched pawl 98 pivoted thereto and urged by a spring 99 into engagement with the toothed wheel 84. The shaft 83 has an angular key I88 adapted to receive a socketed thumb piece IGI which is preferably made removable and whereby the shaft and its pivot wheel and pinion may be rotated in a clockwise direction whenever the notched pawl 98 is manually withdrawn therefrom as by means of hub I82 having a pin I83 to engage the' notch IM in said pawl. This movement is effected by a thumb piece Hi5 socketed to receive a key end I88 on said hub. The movement in a counter-clockwise direction can be manually effected by turning the thumb piece IOI without the necessity of depressing the notched pawl 98. It will furthermore be noted that whenever the yoke comprising arms 93 and 94 is reciprocated in one direction by engagement of roller 91 and lug 75 against the yielding resistance of a spring urged plunger Iii! the notched pawl 98 which is carried by said yoke will move the wheel 84 one notch in a counter-clockwise direction. The pinion 85 rotating with said wheel transmits a corresponding movement to the toothed indicator wheel or disc 88. The pawl 99 serves to arrest the toothed wheel 84 but does not preclude the desired movement thereof.

A lever I88 mounted behind dial wheel 82 has a spring thereon which urges the end I09 thereof away from the extension Iii on the yoke. A pin iI I on the back of the dial wheel is adapted to contact a projecting lug H2 on the member I88 as the dial wheel approaches Zero position, the impulses imparted to the dial wheel. there after causing the pin HI to move the member I 08 so that the end I39 retracts the yoke bodily for a distance suflicient to remove the roller 3? out of the path of lug l5 and at the same time 5 the bar l6 which has a pivotal connection with the member IDS is retracted and releases the clutch member il. A cover case I I 2 which houses this mechanism has a window l is therein which discloses a fragment of the dial on wheel 88 and 10 also the fixed indicator H4 which cooperates therewith to show the number of notches in terms of hours at which the mechanism is set at the moment.

With the electric delayed combination and the long interval delay mechanism operatively associated on the door as shown in Fig. l, the operation of the device to its various purposes is as follows. During the daytime when anti-bandit protection only is desired, the dial wheel 88 is left at zero or in the sub-zero interval provided on the dial, Assuming that the safe is open and the extension 31 of the bolt 2A is in the aperture in the check disc, the motor 55 is continuously run with the clutch held out of engagement by the finger 60 engaging in the notch 48 and depressing the end 48 of the clutch lever. If the custodian of the money chest or safe has any reason to become suspicious or fearful of a hold I up, he need merely turn the dial knob 36 which causes lever 28 to throw the bolt to a locked position. In so doing the safe or chest is conditioned so that it requires the following operation to again open it. First, the given combination W is set up to the mark 88 adjacent the dial whereupon gate 69 drops into tumbler slots 38 and the dial knob is then given a short movement to cause the extension on the gate to release the pawl 58 to throw in the clutch. The custodian must now wait the full anti-bandit delay period, 4.!) e. g., fifteen minutes, and, within the following approximately four minute interval, he must re-- set the combination against the mark '.'2 and throw the bolt into the aperture in the check disc, thereby unlocking the safe or money chest. In the hands of an unauthorized person most of the normal efiorts to forcibly or surreptitiously open the safe result in throwing out the clutch and thus increasing inadvertently the anti-bandit delay period. 5;) At closing time the custodian opens the door of the safe or money chest, and, after first depressing the finger lever H85 turns the thumb piece lill and causes the dial 88 to turn counterclockwise until the numeral representing the desired number of elapsed hours appears opposite the indicator finger H4. If he inadvertently throws the dial wheel too far, he may release the finger piece H15 and turn the dial back to the desired exact location using merely the member i ll 5. The safe or chest is then closed and the bolt shot whereupon the wheel 52 continues its rotation and each time the lug l5 thereon meets the now projected roller 91, the yoke is depressed and causes the notched pawl 98 to move wheel 8 F one notch. This motion is transmitted through the pinion train to the indicator wheel and the pin Ill on the said indicator wheel moves successively closer step by step to the lug M2 on member Hi8. During the last two or three move- 70 ments at approximately zero the pin is exerting force on the lug H2 and loading the spring associated with member I08. When end m9 of member iii? abuts the extension MB of the yoke, the bar i5 is withdrawn from its position, as shown in Fig. 11, to the position shown in Fig. 12, where upon the combination lock must be set and antibandit delay period m'ust elapse and the final combination can then be set up and the bolt withdrawn.

From the foregoing it will be understood that the arrangement substantially as shown provides in a combination lock of slightly modified form an anti-bandit type of lock control and a long delay interval time lock feature. The mechanism is simple and sure in its operation and cannot be improperly opened after it is set and the safe door is locked. The device is furthermore considerably less expensive to manufacture than the previously used time locks embodying delicate watch movements. It is to be understood furthermore that two or more of the locks of the invention may be utilized on large bank vaults if desired, this being a matter of custom to insure positive protection. A single electric delayed combination of the invention will be understood to afford ample and fool-proof protection over the night and holiday seasons. These locks have the added advantage over spring driven movements that they merely require setting instead of winding and setting hence'they eliminate the danger incident to incomplete winding.

What is claimed is:

1. In an electric delayed combination lock the combination with a continuously rotating synchronous motor, gear means continuously rotating therewith, a check disc, a clutch disc, a normally inoperative clutch adapted to engage said gear means whereby the clutch disc and check disc are rotated therewith, a combination lock having a pair of gates separately movable into the tumbler slots thereof, a slidable bolt normally checked by the check disc, one of said gates being operative to move the bolt, and means conditioned by the other of said gates upon proper actuation of the combination lock whereby the clutch mechanism is released to operative engagement with the constantly operating gear means for moving the check disc, after a predetermined interval of operation, into a position wherein said check disc permits operation of the bolt by said first mentioned gate.

2. In an electric delayed combination lock the combination with a continuously rotating synchronous motor, gear means continuously rotating therewith, a check disc, a clutch disc, a normally inoperative clutch adapted to engage said gear means whereby the clutch disc and check disc are rotated therewith, a combination lock having a pair of gates separately movable into th tumbler slots thereof, a slidable bolt normally checked by the check disc, one of said gates being operative to move the bolt, means conditioned by the other of said gates upon proper actuation of the combination lock whereby the clutch mechanism is released to operative engagement with the constantly operating gear means for moving the check disc, after a predetermined interval of operation, into a position wherein said check disc permits operation of the bolt by said first mentioned gate, and means comprising a bar and an adjustable step by step toothed wheel mechanism operable by the gear means for prolonging the delay interval by selected multiples of the normal delay interval.

3. An electric delayed combination lock comprising a combination lock, a first gate operable thereby, a second gate operable by said combination look, a lock bolt operable by said second gate, a slotted bolt check member controlling the bolt, a continuously driven member, a normally inoperative clutch adapted in its engaged position to efiect a driving connection between the bolt check member and said continuously driven member and means operable by the first mentioned gate for releasing the clutch to operative position whereby the check member is moved by said continuously driven member to a position permitting retraction of the bolt by said second mentioned gate.

4. An electric delayed combination lock comprising a combination lock, a first gate operable thereby, a second gate operable by said combination look, a lock bolt operable by said second gate, a slotted bolt check member controlling the bolt, a continuously driven member, a normally inoperative clutch adapted in its engaged position to effect a driving connection between the bolt check member and said continuously driven member, means operable by the first mentioned gate for releasing the clutch to operative position whereby the check member is moved by said continuously driven member to a position permitting retraction of the bolt by said second mentioned gate, a lug on said continuously driven member, a reciprocable bar member yieldably urged to a position for rendering the clutch inoperative, a reciprocable yoke, a step by step ratchet mechanism, a toothed dial wheel geared for movement therewith, means on the dial wheel for retracting the bar when said wheel reaches a predetermined position, means to manually rotate the toothed wheel whereby the means on the dial wheel is moved away from said bar member and means to periodically engage the lug on said continuously driven member whereby the toothed wheel and dial wheel are retracted step by step until the bar is released from said clutch.

5. In an electric delayed combination lock, the combination with a continuously operating synchronous motor, a lock bolt, a bolt check member movably mounted and having an aperture therein to receive the bolt in unlocked position, means whereby said motor may move said check member to dispose the aperture in position to receive said bolt, a clutch yieldably urged to operative position, yieldably urged means to automatically render the clutch inoperative, a combination lock comprising tumblers having slots adapted to be aligned, and a pair of gates severally movable into the aligned slots, one of said gates being operative by said tumblers to release said yieldably urged means, the other of said serving, upon subsequent positioning of the check means, to enable movement of the bolt into the aperture in the check means.

6. In an electric delayed combination lock the combination of a continuously power driven member, a check disc, a clutch means yieldably urged to operatively connect the check disc with the driven member, yieldable means to hold the clutch in an inoperative position, a combination tumbler lock having an associated gate member operative to release said clutch holding means, a lock bolt and a second gate for the tumbler lock operatively connected to move the lock bolt as permitted by said check disc.

'7. In an electric delayed combination lock the combination of a continuously power driven member, a check disc, a clutch means yieldably urged to operatively connect the check disc with the driven member, yieldable means to hold the clutch in an inoperative position, a combination tumbler lock having an associated gate member operative to release said clutch holding means, a lock bolt, a second gate for the tumbler lock operatively connected to move the lock bolt as permitted by said check disc, a reciprocable bar adapted to also hold the clutch in an inoperative position, an adjustable step by step toothed ratchet mechanism, means to manually rotate said ratchet mechanism in one direction to selected positions, means intermittently actuated by the continuously power driven means to intermittently rotate said ratchet mechanism step by step in the opposite direction and cooperating means associated with said bar and ratchet mechanism to retract the bar after full retraction of the ratchet mechanism from its selected manual setting whereby the check disc is placed under the control of the yieldable clutch holding means and said combination lock.

8. The combination with a continuously rotating member and a clutch yieldably urged to engaged relation thereto, of a reciprocable bar mechanism spring urged to a position for holding the clutch in inoperative position, a toothed dial wheel means on said wheel to retract the bar when the wheel is in predetermined position and means including a toothed ratchet wheel adapted to be intermittently actuated by said continuously rotating member for step by step movement of said dial wheel to said predetermined position wherein the bar mechanism is retracted, the retraction of said bar serving also to render the intermittently actuated means inoperative.

9. In an electric delayed combination lock mechanism, a combination lock comprising tumblers having slots therein, a pair of gates dispose-d at substantially diametrically opposite sides of said tumblers for separate cooperation with the aligned slots in said tumblers, a continuously driven toothed wheel, a clutch disc adjacent thereto, a clutch lever pivoted on the clutch disc and having a toothed segment yieldably urged to engaging position with said toothed wheel, said clutch disc having a notch therein into which the end of said clutch lever projects when the clutch is in engaged position, a pawl having a finger thereon adapted to enter the notch in the clutch disc and to engage the end of the clutch lever for disengaging the segment from said toothed wheel, an extension on one of said gates adapted to engage said pawl for moving the finger out of the notch in the clutch disc, a slotted check disc having a yieldable connection with the clutch disc whereby said discs normally move together but are capable of limited relative movement, a lock bolt having an extension receivable in the slot in the check disc, means actuated by the other gate for moving the lock bolt and a trip mechanism normally holding the pawl in position to disen gage the clutch lever and adapted to be rendered temporarily inoperative by actuation of the first mentioned gate and to subsequently be conditioned for operative engagement by the continued rotation of the discs.

10. In combination a toothed ratchet wheel, a toothed dial wheel and means associated with said whee-ls whereby rotation of either wheel effects rotation of the other wheel, a slidable yoke, a notched pawl carried by said yoke and adapted upon movement of the yoke in one direction to advance the toothed ratchet wheel in one direction, means to manually remove said notched pawl from engagement with the toothed ratchet wheel, means to manually rotate the toothed ratchet wheel in the opposite direction when said notched pawl is withheld from engagement therefrom, a spring projected bar, and means associated with said bar and said dial wheel whereby movement of the dial wheel to a predetermined initial position by said notched pawl retracts the spring projected bar.

11. The combination with an electric delayed combination lock comprising a continuously operating member and a clutch, of aprolonged delay auxiliary mechanism comprising a toothed dial wheel and a cooperating ratchet wheel, a reciprocably mounted bar spring urged to projected position wherein the clutch of said delayed electric combination lock is held in inoperative position, a reciprocably mounted yoke adapted in projected position to be intermittently reciprocated by the continuously operating means and a notched pawl associated with said yoke and movable thereby to rotate the toothed ratchet wheel step by step in one direction for effecting ultimate retraction of the bar by the dial wheel, said notched pawl being manually retractable from. operative engagement with the toothed ratchet wheel permitting manual rotation of the toothed ratchet wheel and toothed dial wheel in either direction for efiecting predetermined set ting of said dial wheel.

12. In combination a continuously driven member having a lug thereon, a combination look, a pair of gates associated with said combination lock and separately cooperabletherewith as the lock is set up to its combination adjacent said gates, a lock bolt operable by the combination lock and one of said pair of gates, a clutch disc normally precluding movement of the lock bolt, a clutch member to effect driving connection between the continuously driven member and the clutch disc, clutch control mechanism including an automatic trip and set means, adapted, upon actuation of the other of said pair of gates by said combination lock, to release the clutch member to engage the continuously driven member whereby the check disc is rotated through a single revolution and the clutch is then automatically disengaged by said trip and set means, the check disc being apertured to permit actuation of the bolt by its associated gate during a limited operation of said single revolution of the check disc, a finger adapted to disable operation of the trip and seat means, and adjustable means for rendering said combination lock inoperative for selected multiple periods of time required for a revolution of the continuously operating member.

13. The combination with an anti-bandit electric time lock comprising a continuously rotating member, of a lug on said continuously rotating member, a step by step toothed wheel and ratchet mechanism, means controlled by said mechanism for precluding operation of said antibandit time lock, and means operable by the lug on the continuously rotating member whereby the toothed wheel and ratchet mechanism is retracted stepby step at each revolution of the continuously rotating member.

WILLIAM T. BENHAM.

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