US2335232A - Upwardly opening safe - Google Patents

Description

1943- I c. T. BOLZIGHTON ET AL 2,335,232

UPWARDLY OPENING SAFE Filed Jan. 10, 1942 7 Sheets-Sheet l Nov. 30, 1943. c. T. BOUGHTON ET AL 2,335,232

UPWARDLY OPENING SAFE Nov. 30, 1943. c. T. BOUGHTON ET AL. 2,335,232

Nov. 30, 1943.

c. 'r BOUGHTON ET AL UPWARDLY OPENING SAFE Filed Jan. 10. 1942 7 Sheets-Sheet 6 Patented Nov. 30, 1943 UPWARDLY OPENING SAFE Cecil T. Boughton, Canton,

North Canton, Ohio, assignors & Lock Company, Canton, Ohio,

of Ohio and Karl H. Miller, to Diebold Safe a corporation Application January 10, 1942, Serial No. 426,314

13 Claims.

The invention relates to upwardly opening safes, and more particularly to heat resisting safes including walls forming a compartment having an upwardly opening doorway, an upwardly opening door, and preferably elevator means actuated by the opening and closing of the door adapted for raising and lowering an article holder for valuables, usually documents such as record cards, record sheets, signature cards, and the like, from a position within the safe compartment when the door is closed to a position convenient for use above the safe compartment when the door is open, and for lowering the article holder and valuables back into the compartment upon closing the door.

Such a safe is set forth in United States Letters Patent No. 2,003,302 of William C. Miller and Albert L. Abbott for Safe structure, and the present invention includes improvements of the upwardly opening safe of said patent.

The door opening and closing means of said patent includes a fluid actuated vertically movable lift, the fluid actuating means for which includes a pair of hydraulic rams having cylinders mounting pistons whose upper ends are secured to the lift, a reservoir for the fluid, preferably oil, for operating the rams, a pump for drawing the oil from the reservoir and forcing the oil through conduits leading to the lower ends of the cylinders of the rams, an electric motor for operating the pump, and an electric circuit for operating the motor including a normally open starting switch, a normally open electro-magnetically controlled stick circuit switch, a normally closed stop switch, a normally closed limit switch, a normally open lock controlled switch, and when the safe contains file drawers, normally closed file drawer controlled switches.

In the safe of said patent, the electric motor drives the pump to pump the oil to the rams to cause the lift to elevate the door to the upper end of its movement in effecting either the opening or the closing of the door.

When the upper end of reached the circuit of the motor is automatically interrupted by the limit switch after which the door lowers itself by gravity either to a position at the rear of the compartment when the safe is opened or to the closed position in the doorway.

As the lift lowers, the oil is forced out of the lower ends of the cylinders of the rams back through a regulator valve into the reservoir, the regulator valve including a variable opening for the door movement is Ill) controlling the rate of lowering or settling of the door.

Also, in said patent the lock controlled switch or circuit breaker is normally held open by the bolt work of the door locking mechanism until the bolt work is released to permit the door to be opened.

'The normally open starting switch when momentarily closed, closes the circuit of the electromagnetically controlled stick circuit switch. The normally closed stop switch operates to stop the motor at any instant by opening the stop switch. When file drawers are contained in the safe compartment, the drawer controlled switches therefor must all be closed before the motor can operate.

The general construction and arrangement and the operating characteristics of the safe of said patent'have proven to be very satisfactory in use, but the fluid actuating means for the door lift are relatively difiicult and expensive to manufacture, and are subject to operating difiiculties usual with fluid actuated devices, such as clogging of the oil conduits by dust and dirt, excessive oil leakage past the pistons, unequal flow of oil to both rams with a consequent overloading of one ram, and the like.

The objects of the present invention include the provision of a safe having all the desirable characteristics of said U. S. Patent No. 2,003,302, and including electric motor driven mechanical actuating means for the vertically movable lift, the mechanical actuating means being of such nature as to enable more simplified and economical manufacture than the fluid actuating means for the. lift of said patent, and being adapted for more satisfactory operation.

Further objects of theinvention include the provision of an electric motor driven mechanical lift including a pair of raising and lowering members arranged for simultaneous equally distributed power raising and lowering.

Further objects of the present invention include the provision of an improved electric motor driven mechanical lift including two simultaneously operating raising and lowering members, and which is simplified in construction and in the arrangement and cooperation of its parts, so that the lift may be manufactured and maintained with facility and economy, and so that at the same time the lift is capable of operating with ease and certainty.

lihe foregoing and other objects are attained by the upwardly opening safe, and electric motor driven mechanical lift therefor, apparatus, parts, improvements, combinations, and sub-combinations, which comprise the present invention, and the nature of which is set forth in the following general statement, and preferred embodiments of which together with their mode of use are set forth in the following description, and which are particularly and distinctly pointed out and set forth in the appended claims forming part hereof.

The nature of the present invention may be stated in general terms as including walls forming a safe body having an upwardly opening doorway, a door arranged for guided movement to and from a fitting and closing position in the doorway, and improved lift means preferably hinge connected with one edge of the door for effecting raising and lowering movement of the door, the lift means including a pair of spaced mechanical jack means, preferably screw jack means, each jack means including a raising and lowering member preferably a rotary jack screw, a bridge extending lengthwise between the spaced jack means, and the bridge having ends secured to the raising and lowering members of the jack means. Preferably reversing electric motor drive means are located on the bridge, and preferably sprocket wheel and endless chain belt means providing a power drive connection between the electric motor drive means and the preferred rotary screw jack raising and lowering members of the jack means.

The improved safe furthermore preferably includes an improved electric circuit for controlling the operation of the motor, and also includes further improved details of construction and arrangement set forth hereinafter, and also preferably includes other parts as set forth in said U. S. Patent No. 2,003,302.

Preferred embodiments of the improvements are illustrated, by way of example, in the accompanying drawings forming part hereof, in which Figure 1 is an isometric view of an upwardly opening safe including the improvements, with the hood removed of the improved electric motor driven mechanical lift, the lift being in its extreme lower position and the door hinge connected at its rear edge to the lift being in its closed position in the upwardly opening doorway;

Fig. 2, a similar isometric view, with the lift in an intermediate position between its extreme lower and upper positions and the door hinge connected to the lift in its concurrent intermediate position between its closed position and its extreme upper position;

Fig. 3, a top plan view of the safe, with its parts in. their relative positions when the door is closed, and withthe hood for the lift removed, as in Fig. 1;

Fig. l, a rear vertical sectional View thereof as on line 44, Fig. 3, with the hood for the lift in place;

Fig. 5, a transverse sectional view thereof as on line 5--5, Fig. 3, with portions broken away and shown in section;

Fig. 6, a fragmentary transverse sectional View similar to Fig. 5, but showing the parts in thei relative positions when the lift and the door are in intermediate positions, as shown in Fig. 2;

Fig. '7, a fragmentary view similar to Figs. 5 and 6, showing the parts in their relative positions when the lift and the door are in their extreme upper positions;

Fig. 3, a view similar to Figs. 5, 6, and 7, showing the parts in their relative positions when the lift and the door are in their extreme lower positions at the of the safe compartment, and

with the article holder in its extreme upper posi-.

tion, enabling access to and use of the articles contained in the article holder;

Fig. 9, a diagrammatic view illustrating the circuit of the electric motor driving the mechan ical lift; and

Fig. 10, a fragmentary front elevation view showing the preferred lever operated stop switch for the drive motor of the safe, and the mounting of the stop switch on the safe body.

Similar numerals refer to throughout several views.

The improved upwardly opening safe is indicated generally by l 8 and has an external appearance and many parts generally similar to or substantially the same as the safe illustrated in said U. S. Patent No. 2,003,302, and such parts will only be described briefly herein.

The illustrated safe it includes a composite safe body indicated generally by Hi and having an inner five-walled upwardly opening sheet metal compartment indicated generally by l l, and a five-walled monolithic heat and fire resisting shell indicated generally by i2 enclosing the inner compartment l I, the shell being provided with tension reinforcing means indicated generally by 43. and the compartment and shell being enclosed in an external five-walled interlocking sheet metal case indicated generally by M.

Each of the five-walled structures preferably comprises five sides of a six-sided preferably rectangular polyhedron, the sixth upper side of which is open.

A door frame indicated generally by [5- connects the opening of the inner compartment II with the opening of the outer case I4 and forms a closure for the outer end of the monolithic shell 2 2. A door indicated generally by It forms a closure fitting the door frame, and the door and door frame are provided with usual interfitting tongues and grooves to form an effective flame and heat resisting joint between the door and the door frame when the door is in the closed position, and thus also providing a sealing closure for the upper sixth side of the composite safe body I0 and its compartment H and shell 52 and case M.

The door i6 as illustrated includes an outer shell it of formed metal sheets, the interior of which is filled with heat resisting material l9 which is provided with tension reinforcing means rill.

A tray or article holder indicated generally by 25 is arranged for being lowered into and raised from the compartment II of the safe body id, as shown by elevator means indicated generally by 22 operatively interposed between the article holder 2i and the safe body 50. The article holder 25 and the elevator means 22 and their relationship with each other and the compartment H are substantially identical with those set forth in said U. S. Patent No. 2,003,302.

For the purposes of the present improvements, it need only be stated that the article holder 2| has mounted at each end thereof a pair of laterally spaced upwardly and downwardly extended articulated racks each indicated generally by 23.

Interposed between each end of the article holder 25 and the opposite end wall of the compartment H, a horizontally extending shaft 24 has its forward end journalled in a suitable bearing 25 mounted in the front wall of the compartment l l, and the rear end of the shaft 24 extends through and is journalled in bearing means indicated generally by 26 extending similar parts through the rear walls of the compartment l I, the shell l2, and the case l4.

On the shaft 24 within the compartment H a pair of pinions 21 are secured, each of which meshes with one of the articulated racks 23.

The composite safe body It as shown is supported upon a base frame indicated generally by 28, and a lift housing indicated generally by 29 is located at the rear of the safe body l.

Within the lift housing 2% the rear end of each shaft 2-5 has secured thereon a sprocket wheel 30.

The base frame 28 includes a rear wall 3! alined with the rear wall of the case Hi, and preferably vertically below each sprocket wheel 30, a sprocket wheel 32 is journalled on a bearing post 33 secured on the base frame rear wall 3|.

An endless chain belt 54 extends about each set of vertically spaced sprocket wheels 32 and 3G, and a horizontally extending elevator bar 35 is located in the housing 29 at the rear of the chain belts 3 3, and at each end the bar 35 is secured by a bracket 36 with the outer vertical line of links of one of the chain belts 34. The elevator bar 35 as shown is an angle bar having an upper horizontal flange at opposite ends of which above the brackets 36 are secured striker blocks 3'! for contact with the lower edge of the door as it is being lowered into or raised from the housing 29, as hereinafter set forth in detail.

The article holder elevator means of the present improvements is generally similar to but differs from the elevator means of said U. S. Patent No. 2,003,302 in the use of two separate chain belts 34 for the two sets of sprocket wheels 39 and 32 which operate the parallel horizontal shafts 24, whereas in said patent, an endless chain and bar linkage having central crossing portions are extended around and operate the similar sprocket wheels.

The operation of the elevator means 22 of the present improvements is the same as the operation of the elevator means of said patent, that is when the elevator bar 35 is lowered, the shafts 24 are rotated simultaneously. Assuming the article holder 2! to be in its lowermost position in the'compartment ll, when the elevator bar 35 is lowered, the shafts 24 are rotated to raise the article holder 2!, and vice versa.

On the outer top border of each end wall of the safe body it), a forwardly and rearwardly extending track fill is located, each track 48 being spaced endwise from the adjacent end edge of the door. At each front corner of the door, a bracket ti mounts a cantilever stub shaft journaling a roller d2 rolling on the adjacent track (it. At each rear corner of the door It a hinge bracket d3 is secured.

The lift housing 29 has an open upper end and has operatively mounted therein improved lift means indicated generally by M which includes at each end of the housing it screw jack means indicated generally by M and including an upright jack tube #5 whose lower end preferably fits and is secured in and supported by a base socket it which in turn as shown is supported upon and secured within the bottom wall of a base pan ll of the housing it, the base pan 41 in turn as shown being supported upon a horizontal base plate 43 forming part of the base frame 28.

The housing 29 extends a substantial distance above the top of the safe body it, and each jack tube 55 terminates between the top of the hous ing 29 and the top of the safe body It.

At the upper end of each preferably cylindric jack tube is secured a jack nut 49, and an elongated rotary jack screw is screwed in each jack nut 49.

Each jack screw 56 has an upper shaft end at extending beyond the upper end of the threads of the jack screw and is mounted by a double thrust and journal bearing means indicated generally by 52 in a bracket and housing unit indicated generally by 53.

Each bracket and housing unit 53 includes a hinge bracket 54 extending vertically at one side of one of the hinge brackets til at one of the rear corners of the door it, and each set of hinge brackets 43 and 5d are hinge connected with each other by a hinge pin 55 whose axis extends parallel with the rear longitudinal edge of the door it and is offset rearwardly therefrom in the usual manner.

Each bracket and housing unit '53 also includes a bridge bar connecting bracket 56 extending horizontally from the bottom of the one unit 53 towards the bracket 56 of the opposite unit 53 on the other jack screw 50.

A bridge bar 5'1 extends lengthwise between the bracket and housing units and the ends of the bridge bar 5i are secured to the brackets 55 of the units 53 as by bolt and nut means 58.

The upper shaft end 5! of each jack screw extends above its associated bracket and housing unit 53 within which it is bearing mounted, and above each unit 53 each jack screw shaft end 5! has a sprocket wheel 59 secured thereon.

As shown, centrally located on the bridge bar 5'! is mounted a reversing electric drive motor and reduction gear unit indicated generally by if? for the improved lift means 44.

The motor and reduction gear unit Ell includes a vertically extending drive shaft of having a pair of vertically spaced sprocket wheels 52 secured thereon, and each sprocket wheel 62 and one of the sprocket wheels 59 are operatively connected by an endless chain belt '53.

The improved lift means id furthermore in cludes a guide channel 64 located between each jack means A l and the adjacent end wall of the housing and the upper end of each guide channel 84 is secured to the bracket and housing unit 53 carried on the upper end of the screw of its associated jack means. The flanges of each guide channel 5- 5 extend about its associated jack means towards the flanges of the other guide channel E l At each end of the housing 29, walls form vertically extending slide guides 65 for each guide channel 84, and the improved lift means M is furthermore preferably reinforced by a rear plate 65 extending between and connected to the rear flanges of the guide channels 65.

Operatively associated with the safe body Iii and the lift housing 29, at each rear corner of the safe body It, track switch i is located including a forwardly opening groove track 68 having its front end alined with one of the upper tracks All on the safe body iii. I The groove track 58 communicates at it inner end with a vertical groove track fit! which also communicates with a rearwardly and downward-- 1y extending groove track it. A switch lever ll is operatively mounted between the groove tracks 63 and H3 at the lower end of the vertical groove track 69 for automatic actuation by the associated roller 42 on the front edge of the door.

The lower end of each track groove lil cornmunicates with the upper end of a channel track 70' located in the housing 29.

Each track switch Bl is similar in construction and operation to the track switches of said U. S. Patent No. 2,003,302, and one of the track switches 57 is arranged for automatically actuating a reversing switch indicated diagrammatically in Fig. 9 in a manner similar to the operation of the limit switch of said patent.

In the safe 50, the door is provided with bolt work controlled by a combination lock indicated generally by 12, and the bolt work may be and preferably is associated with a lock controlled switch, as in said patent.

Likewise the safe l may be provided with drawer controlled switches when its article holder 2i is provided with drawers, as in said patent.

In the operation of the improved safe, when the article holder 2| is in the compartment H and the door it is closed as in Figs. 1, 3, 4, and 5, closing the normally open starting or raising switch it: serves to operate the motor and reduction gear unit 60, and causes the sprocket wheels 62 and sprocket wheels 59 and their endless chain belt 63 to rotate the jack screws 50 in the stationary jack nuts 68 raising the jack screws and their bracket and housing units 53 hinge connected with the door it, thereby raising the door it through the intermediate position shown in Figs. 2 and 6 to the extreme upper position of the jack screws and door, shown in Fig. '7, at which the reversing switch 14 is automatically actuated by one of the track switches 61 to cause reverse rotation of the motor 60 and lowering of the door E6 to its extreme lower position 8, the lowering of the door serving to actuate the elevator means 22 to raise the article holder 21 to the position for use shown in Fig. 8.

In the preferred wiring as shown diagrammatically in Fig. 9, the electric power supply line for the motor 60 includes two main conductors 75 and 15. As illustrated the conductor 16 extends to the central terminal ll of the motor 60 through series connected switches, as follows: an overload circuit breaker switch 79, and a plurality of drawer switches 80, the article holder 2! usually being provided with a plurality of drawers, as in U. S. Patent No. 2,003,302. r I

The other main power supply line 75 has a branch 15-! which has series connected therein the starting or raising switch 73, the bolt work switch 8!, the coil of the magnetic reversing relay B2 and a return therefrom to the line of the conductor 76 at a junction 83 beyond the drawer controlled switches 80.

The branch 'l5l has a second branch 15-2 in which is series connected one set of contacts 84 of the relay 82, the reversing switch 74 and the lowering switch 85 terminating in a junction at 85 with the branch 15-4 between the raising switch 73 and the lowering switch 85.

The main conductor 15 has another branch 15-3 which itself has one branch l4 in which is series connected another set of contacts 8'! closed and opened simultaneously with the contacts 8 of the relay 82, the branch 75- 3 extending from the contacts 8? to one outer terminal 88 of the motor one of the motor windings being connected between the terminal 38 and the terminal ll.

Another branch l'5-5 the main conductor 15 therein the set of contacts which are opened and closed of the branch l5-3 of has series connected 189 of the relay 82 as shown in Fig.

18, an emergency stop reversely to the sets of contacts 84 and 81, and from which the branch 75-5 extends to the other outer terminal 99 of the motor 60 with a stop switch 9| series connected therein. I

In the diagram of Fig. 9, the various switches are shown in their positions when the door It is in closed position. Each of the drawer switches and the bolt work switch 3i are safety switches and must be closed to permit raising of the door. The drawer switches are closed when the drawers are closed, and the bolt work switch is closed when the bolt work is retracted.

The lowering switch S5 is normally closed, and the stop switch 9 l, located as shown on the upper right hand rear corner of the safe body as viewed from the front, is closed except when held open by the actuator 92 secured on the right hand door hinge bracket 43.

The stop switch 9i has a downwardly extending operating lever 93, and the actuator 92 has two actuating blades 9d and 95 at right angles to each other, one of which presses the lever 93 to hold open the stop switch 9i as and when the door [5 reaches either the fully closed or fully open position.

When the raising switch 73 is momentarily closed from its normally open position, the coil of the relay 82 is energized actuating its armature to close the sets of contacts 8 3 and 81 and to produce through contacts 8 3, and switches 74 and 85 another connection of one terminal of the relay coil with the main conductor 15, the other coil terminal being still connected to the main conductor 76, thereby continuing to energize the relay coil.

At the same time the conductor 75 is in a connected circuit through the relay contacts 87 with the motor terminal 88, and the main conductor 16 is in a connected circuit through the circuit breaker 73, the emergency stop switch 79, and the drawer switches 89 with the intermediate motor terminal Tl, and the motor operates to raise the jack screws and door.

When the door it reaches its extreme upper position, the track switch 67 operates through the plunger 96, as set forth in U. S. Patent No. 2,003,302, to open the reverse switch it, and deenergize the coil of the relay 82.

The relay armature returns to the position shown in Fig. 9, with the contacts 89 closed, and the stop switch 9| 'now being closed, the motor terminal 90 is connected with main conductor 75, and the motor terminal ll still being connected with the main conductor it, the motor reverses to lower the jack screws and door.

If the relay contacts should stick, the plunger 96 would continue downwardly and open the emergency stop switch 79, stopping the motor.

If during any raising movement of the screw acks, it is desired to reverse the motor manually door nears and reaches the fully open position the actuating blade Sid opens and holds open the stop switch ti, and when the door reaches thefully closed position the actuating blade opens and holds open the stop switch 95.

The use of the lever operated stop switch 9! alternately actuated by the blades iiiand 95 of the actuator $2 secured to the right hand door hinge bracket 23, permits the single stop switch 9! to be used for stopping the motor iii as and when the door reaches both the fully open and fully closed position, and also provides for coasting the motor since the blades 94' and 95 slide over the lever 93 of the stop switch 9| after having actuated the lever to open the stop switch 9 I.

When the door has reached its fully open position, and it i desired to close the door, the normally open starting or raising switch 13 is closed momentarily, and the door is automatically raised and lowered to the closing position, it being noted that for both opening the door and closing the door, the screw jacks first raise and then lower after the automatic actuation of the reverse switch 14 by the track switch 61.

The embodiments of the present improvements illustrated and described herein are by way of example, and the scope of the present invention is not limited to the same or to the particular details thereof, but is commensurate with any and all novel subject matter contained herein which may at any time properly under the United States patent laws be set forth in the claims hereof, or originating herein, and the elements of any such claims are intended to include their reasonable, functional and structural equivalents.

We claim:

1. In a safe and the like, a body having an inner compartment and. an upwardly opening doorway for the compartment, a door arranged for guided movement to and from a closing position in the doorway, lift means having an operative connection with the door for effecting the guided movement of the door, the lift means including spaced mechanical jack means having raising and lowering members included in the operative connection of the lift means with the door, and electric motor drive means carried by the raising and lowering members for operating the jack means for simultaneously moving the raising and lowering members.

2. In a safe and the like, a body having an inner compartment and an upwardly opening doorway for the compartment, a door arranged for guided movement to and from a closing position in the doorway, lift means and hinge means operatively connecting the lift means with the door for effecting the guided movement of the door, the lift means including spaced mechanical jack means having raising and lowering members included in the hinge connection of the lift means with the door, and electric motor drive means carried by the raising and lowering members for operating the jack means for simultaneously moving the raising and lowering members.

3. In a safe and the like, a body having an inner compartment and an upwardly opening doorway for the compartment, a door arranged for guided movement to and from a closing position in the doorway, lift means having an operative connection with the door for effecting the guided movement of the door, the lift means including spaced mechanical jack means, each jack means including a raising and lowering member, a bridge extending lengthwise between the spaced jack means, the bridge having ends secured to the raising and lowering members of the jack means, an electric motor on the bridge, and power drive connecting means between the electric motor and the jack means for operating the jack means for simultaneously moving the raising and lowering members.

4. In a safe and the like, a body having an inner compartment and an upwardly opening doorway for the compartment, a door arranged for guided movement to and from a closing position in the doorway, lift means and hinge connecting means between the lift means and the door for effecting the guided movement of the door, the lift means including spaced mechanical jack means, each jack means including a raising and lowering member, a bridge extending lengthwise between the spaced jack means, the bridge having ends secured to the raising and lowering members of the jack means, an electric motor on the bridge, and power drive connecting means between the electric motor and the jack means for operating the jack means for simultaneously moving the raising and lowering members.

5. In a safe and the like, a body having an inner compartment and an upwardly opening doorway for the compartment, a door arranged for guided movement to and from a closing position in the doorway, lift means having an operative connection with the door for effecting the guided movement of the door, the lift means including spaced screw jack means, each jack means including a raising and lowering rotary jack screw, each screw having journalled thereon a member included in the operative connection of the lift means with the door, and electric motor drive means carried by the journalled members for simultaneously rotating the jack screws.

6. In a safe and the like, a body having an inner compartment and an upwardly opening doorway for the compartment, a door arranged for guided movement to and from a closing position in the doorway, lift means and hinge connecting means between the lift means and the door for effecting the guided movement of the door, the lift means including spaced screw jack means, each jack means including a raising and lowering rotary jack screw, each screw having journalled thereon a member included in the hinge connecting means between the lift means and the door, and electric motor drive means carried by the journalled members for simultaneously rotating the jack screws.

'7. In a safe and the like, a body having an inner compartment and an upwardly opening doorway for the compartment, a door arranged for guided movement to and from a closing position in the doorway, lift means having anoperative connection with the door for effecting the guided movement of the door, the lift means including spaced screw jack means, each jack means including a raising and lowering rotary jack screw, each screw having journalled thereon a member included in the operative connection of the lift means with the door, a bridge extending lengthwise between the journalled members, the bridge having ends secured to the journalled members, an electric motor on the bridge, and power drive connecting means between the electric motor and the jack means for simultaneously rotating the jack screws.

8. In a safe and the like, a body having an inner compartment and an upwardly opening doorway for the compartment, a door arranged for guided movement to and from a closing position in the doorway, lift means and hinge connecting means between the lift means and the door for effecting the guided movement of the door, the lift means including spaced screw jack means, each jack means including a raising and lowering rotary jack screw, each screw having journalled thereon a member included in the hinge connecting means between the lift means and the door, a bridge extending lengthwise between the an electric motor journalled members, the bridge having ends secured to the journalled members, an electric motor on the bridge, and power drive connecting means between the electric motor and the jack means for simultaneously rotating the jack screws.

9. In a safe and the like, a body having an inner compartment and an upwardly opening doorway for the compartment, a door arranged for guided movement to and from a closing position in the doorway, lift means having an operative connection with the door for efiecting the guided movement of the door, the lift means including spaced screw jack means, each jack means including a raising and lowering rotary jack screw, each screw having journalled thereon a member included in the operative connection of the lift means with the door, a bridge extending lengthwise between the journalled members, the bridge having ends secured to the journalled members, on the bridge, and sprocket wheel and endless chain belt power drive connecting means between the electric motor and the jack means for simultaneously rotating the jack screws.

'10. In a safe and the like, a body having an inner compartment and an upwardly opening doorway for the compartment, a door arranged for guided movement to and from a closing position in the doorway, lift means and hinge connecting means between the lift means and the door for effecting the guided movement of the door, the lift means including spaced screw jack means, each jack means including a raising and lowering rotary jack screw, each screw having journalled thereon a member included in the hinge connecting means between the lift means and the door, a bridge extending lengthwise between the journalled members, the bridge having ends secured to the journalled members, an electric motor on the bridge, and sprocket wheel and endless chain belt power drive connecting means between the electric motor and the jack means for simultaneously rotating the jack screws. Y

11. In a safe and the like, a body having an inner compartment and an upwardly opening doorway for the compartment, a door arranged for guided movement to'and from a closing position in the doorway, lift means having an operative connection with the door for effecting the guided movement of the door, the lift means including spaced mechanical jack means, each jack means including a raising and lowering member, a bridge extending lengthwise between'the spaced jack means, the bridge having ends secured to the raising and lowering members of the jack means, an electric motor on the bridge, and power drive connecting means between the electric mo tor and the jack means for operating the jack means for simultaneously moving the raising and lowering members, and slide guide means for the jack means, each slide guide means including a movable slide member secured to one of the raising and lowering members and an adjacent stationary guide member.

12. In a lift adapted for moving a guided door and the like to and from a closing position in an upwardly opening doorway of a compartment body and the like, spaced screw jack means, each jack means including a raising and lowering rotary jack screw, each screw having journalled thereon a member adapted for operative connection with the door and the like to'be moved, and electric motor drive means carried by the journalled members for simultaneously rotating the jack screws.

13. In a lift adapted for moving a guided door and the like to and from a closing position in an upwardly opening doorway of a compartment body and the like, spaced screw jack means, each jack means including a raising and lowering rotary jack screw, each screw having journalled thereon a member adapted for operative connection with the door and the like to be moved, a bridge extending lengthwise and having ends secured to the journalled members, an electric motor on the bridge, and power drive connecting means between the electric motor and the jack means for simultaneously rotating the jack screws.

CECIL T. BOUGHTON. KARL H. MILLER.

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