Electric Dumbwaiters We are the Largest Manufacturers of Electric Dumbwaiters in the World Burdett-Rowntree Mfg. Co. CHICAGO :: NEW YORK Burdett-Rowntree Manufacturing Co. We are prepared to furnish Electric Dumbwaiters for any special purpose desired. We have electric dumbwaiters in operation for almost every im¬ aginable combination of loads and speeds from 600 pounds traveling at 50 feet per minute to 150 pounds traveling at 1,000 feet per minute. We have controls suited to al¬ most every possible condition. If none of our standard controls seem exactly suited to your needs, we will gladly devise for you a special arrangement to suit your particular needs. We can save you thousands of dollars annually by carrying your product from one floor to another in the most economical and quick¬ est way. 85 W. Jackson Blvd. Chicago 147 W. 26th Street New York Hotel St. Regis, New York City. Seven Electric Dumbwaiters. Hotel Astor, New York City. Nine Electric Dumbwaiters. 11 DFC 7 191/ Electric Dumbwaiters W E build and install a large number of different types of eleetric dumbwaiters, each type being designed especially to meet the requirements of some par¬ ticular line of business. The various combinations of these types enable us to furnish electric dumb¬ waiters adapted to almost any possible condition. We install them in hotels, res¬ taurants, cafes, libraries, whole¬ sale and retail houses, in hospitals and in private residences, and in fact in almost every building of any pretensions. As we have in¬ stalled a large majority of the electric dumbwaiters in use in the United States, we could not in this small catalogue give even a representative list of our installa¬ tions, but we mention below a few of some of the different types of buildings that are using our dumbwaiters in order to dem¬ onstrate that those who require the highest type of equipment are using our machines. Hotels. St. Regis, New York City. Auditorium Annex, Chicago. St. Francis, San Francisco. Grunewald, New Orleans. 7 Hotel Grunewald, New Orleans. Four Electric Dumbwaiters. Hotel St. Francis, San Francisco. Three Electric Dumbwaiters. Restaurants and Cafes. Cafe Martin, New York City. Bismarck, Chicago. Broad St. Station, Philadelphia. Chandler & Rudd, Cleveland. Clubs. New York, New York Citv. Chicago Athletic, Chicago. Crescent Athletic, Brooklyn. Racquet, Philadelphia. Libraries. All Carnegie Libraries, New York. Chicago Public Library, Chicago. Free Public Library, Louisville. Library of Congress, Washingt’n. Factories. Felt & Tarrant Mig. Co., Chi¬ cago. Duff Mfg. Co., Pittsburg. H. Sonneborn 8z Co., Baltimore. S. S. White Dental Co., Phila. y \ Marshall Field & Co., Chicago. Wholesale Store. Five Electric Dumbwaiters. \ ^ ^4 jJM. ^ , IS is-iia.iss n pan JtiLlHM M IS Marshall Field & Co., Chicago. Retail Store. Seven Electric Dumbwaiters. Wholesale Houses. Revillon Freres, New York. Marshall Field & Co., Chicago. A. Zellerbach & Sons, San Fran. Cluett, Peabody & Co., St. Louis. Retail Houses. B. Altman & Co., New York. Carson, Pirie, Scott & Co., Chi¬ cago. Scruggs, Vandervoort & Barney, St. Louis. Marshall Field & Co., Chicago. H. Jevne Co., Los Angeles. Hospitals. Presbyterian Hospital, Chicago. Women’s Hospital, New York. Hospital for Insane, Cherokee, la. Providence Retreat, Buffalo. Private Residences. Mrs. Bradley Martin, New York. Mr. Franklin MacVeagh, Chicago. Mrs. M. B. Caldwell, Louisville. Mr. W. A. Marburg, Baltimore. 12 Carson, Pirie, Scott & Co., Chicago. Retail Store. Two Electric Dumbwaiters. Wanamaker’s, New York. Six Electric Dumbwaiters. General Description W E design and build our ma¬ chines so that they are ex¬ tremely simple in their construc¬ tion. At the same time they are far more automatic in their opera¬ tion than other dumbwaiters of a similar type of control and will bear comparison with the best constructed electrical machines of any kind. Every part is put to¬ gether with the greatest mechan¬ ical accuracy. Our motors are built especially for this work and we use our special patented sys¬ tem of motor winding, thereby producing results that can not be obtained with ordinary motors. The number of switches and mov¬ ing parts has been reduced to a minimum and the machines are therefore very simple and have no parts liable to get out of order. By means of our patented sys¬ tem of automatically slowing down the car before it reaches the floor, we are able to run our auto¬ matic dumbwaiters at almost any speed desired and cause them to stop smoothly and accurately at any floor. We have now in daily operation an automatic dumbwaiter running one thousand feet per minute, where the automatic stops at the different floors never vary more than one and a half inches at any time regardless of the load. We build each machine spe¬ cially for the load, speed, length of travel and voltage, etc., of each particular installation. 14 Details of Electric Dumbwaiter Controls O N the following pages we give a brief description of each type of control and some of the purposes for which they are adapted. Following these types of control will be found a few pages containing information rela¬ tive to the load, speed and travel, etc., of each different type of dumbwaiter machine. We can furnish almost any form of control for automatic dumbwaiters that may be desired. The controls and types mentioned herein are our standard construc¬ tions and they can be modified to suit special requirements when necessary. We divide our electric controls into two heads—automatic and non-automatic. With the auto¬ matic control, the car stops auto- ically at any floor to which it is sent. With the non-automatic control, the car stops automat¬ ically at the limits of its travel and only stops at an intermediate point wheff|Stopped by an attend¬ ant either-to-uching a button, or pulling the cdutrol rope, as the case may be. We divide our automatic con¬ trols into five divisions and the non-automatic into three divisions as described on the following pages. Burdett-Rowntree Mfg. Co. 16 This is a View from Above of the Control Slate OF Our Automatic Dumbwaiters. Full Push Control ''T^HE car can be controlled ^ from any floor and can be brought to any floor or sent to any floor by simply pressing a button on any floor. If the car is in use or if any door is open, the car can not be started. We can furnish this control for any type of machine we build. We do not recommend it for any of our type A machines with a higher speed than 130 feet per minute, as the type'' A machines are not furnished with a slowing-up device and at a higher speed than 130 feet per minute, the stops would not be very accurate without the automatic slowing-up device. We can, however, if desired, furnish this control with type A machines up to 200 feet per min¬ ute if accurate stops are not de¬ sired. This full push control is espe¬ cially suited for private residences and for all purposes where it may be desired to control the dumb¬ waiter from different floors at dif¬ ferent times. 18 A W i i f Typical Control Box One Point with Signals T he car can be controlled from one floor only. It can be sent to any floor from any floor, when operated from the controlling floor. The control box indicates the last floor to which the car was sent. A signal lamp shows whether the car is in motion or at rest and whether any door is open. Signal devices are furnished so that pres¬ sing a button on any floor will signal to the operator that the car is desired at the floor from which the signal was sent. If the car is in use or if any door is open, the car can not be started. Sometimes with this control we also furnish where desired, signal devices operated from the car so that before the attendant closes the door, by touching one of a set of buttons in the car, he can signal to the operator the floor to which it is desired the car should go. Also where desired we install a bell on each floor and a set of but¬ tons on the control board, so that the operator can call up any floor where the car is unnecessarily de¬ tained. We can furnish this control for any of our types of machines, ex¬ cept types A. It is especially suited for all purposes where the largest possible benefit is desired from the use of the dumbwaiter. 20 One Point Control. Half Automatic Control T he car can be fully con¬ trolled from one floor only. When operated from that floor, usually the main floor, the car can be sent to any floor from any floor. When operated from any of the other floors, the car can only be sent to the main floor. If the car is in use or if any door is open, the car can not be started. We can furnish this control with any of our types of machines, but we do not recommend its use with our type A machines with a higher speed than 130 feet per minute, as no slowing-up device is furnished with the type A machines. It is especially suited for apart¬ ment houses, restaurants, hotels, clubs, libraries, etc. Call and Send Control HE car can be fully con- ^ trolled from one floor only, When operated from that floor, us¬ ually the main floor, the car can be sent to any floor from any floor. When operated from any of the other floors, the car can be called to that floor or can be sent to the main floor, but it can not be sent to any of the other floors. This control can be furnished with any of our types of machines, but we do not recommend its use with our type A machines with a higher speed than 130 feet per min¬ ute on account of the absence of slowing-up devices on this machine. It is especially suited for apart¬ ment houses, restaurants, libraries, etc. 23 Car Control T^HE car can be controlled only ^ from the floor at which the car is situated. A set of control but¬ tons is placed in the car. The car can be sent to any floor, but can not be brought to any floor. We can furnish this control with any of our types of machines. We do not recommend its use with type A with a speed of over 130 feet per minute or at a greater speed than 200 feet per minute in any case. It is especially suited for restau¬ rant service where not over three or four floors are to be served. Its special application is for use in restaurant service, as it is the only form of control that can be safely operated without any doors on the dumbwaiter hatchway. The elimination of the doors makes it possible for the waiters to load and unload the cars much more rapidly and in perfect safety, as the car can not be started from any other floor. 24 4 . » The Burdett-Rowntree Meg. Co. Automatic Electric High-Speed Dumbwaiter Engine, WITH Push-Button Control. Non-Automatic Control — Two-Button T^HIS control is to be used only ^ on two-stop machines, that is machines with top and bottom stop only. For two-floor use it is the exact equivalent of the full push control, except that we do not ad¬ vise its use at a greater speed than 130 feet per minute if accurate stops are desired. At a higher speed than 130 feet per minute we recommend the use of the full push control. It can be used on any of our types of machines and is applicable for any purpose where top and bot¬ tom stops only are desired. If the car is in use or if any door is open, the car can not be started. 26 Traction Sheave Machine, WITH Full Push Control. Three-Button Control T he car can be started in either the np or down direction by touching the up or down button on any floor. It can be stopped at any time by touching the “stop” button on any floor. If not stopped in this way, it will automatically stop at the limit of its travel. If the car is in use or any door is open, the car can not be started. We can furnish this control on any of our types of machines, but we do not recommend its use with a higher speed than 130 feet per minute, as with higher speeds the difficulty of making good intermedi¬ ate stops would probably result in the operator making poor stops and then correcting them by endeavor¬ ing to move the car a few inches at a time, thereby placing an excessive amount of wear and tear on the operating switches. It is especially suited for installa¬ tions where an attendant will al¬ ways be at the floor to which the car is sent, so that he can stop the car upon its arrival. 28 Traction Sheave Machine, with Three-Button Control, Rope Control I HE car is operated by means ^ of a rope in the dumbwaiter hatchway in a similar manner to the control of an ordinary rope control freight elevator. This control has no automatic features, except that the car stops automatically at the top and bottom at the limit of its travel. We can furnish this control with any of our types of machines, but we do not recommend its use, as it is always open to the possibility of the car being started by the attend¬ ant on another floor at the moment it is being loaded or unloaded, and so the danger of accident is always more or less present with any rope control dumbwaiter. 30 View from above of Two-Button Control FOR Type A Machine. Traction Sheave Machine, Type A, WITHOUT Control. ELECTRIC DUMBWAITERS DRUM MACHINES Direct or Alternating Current DUTY TABLES Type Load Speed B. 100 lbs. 150 F. P. M. 150 “ 100 U B. O. 100 lbs. 225 F. P. M. 150 “ 200 ii 200 “ 150 (C 250 “ 100 a B. A. 200 lbs. 200 F. P. M. 250 “ 150 ii 400 ‘‘ 100 a 500 ‘‘ 75 a B. B. 250 lbs. 200 F. P. M. 300 “ 150 C. 100 lbs. 500 F. P. M. 200 “ 300 n 300 200 (i 400 “ 150 a 500 “ 100 u D. 200 lbs. 500 F. P. M. 300 “ 400 400 “ 300 a 500 “ 200 If desired, Counterweight can be omitted on speeds 100 F. P. M. and 150 F. P. M. in type B. and B. O. by adding in weight of car in figuring duty. Slack Cable Device on car. Alternating machines car speed limited to 200 F. P. M. Two and Three Button Controls car speed limited to 200 F. P. M. Rope Control machines car speed limited to 130 F. P. M. If travel over 100 feet, allow for weight of cables in figuring duty. ELECTRIC DUMBWAITERS TRACTION SHEAVE MACHINES Direct Current only DUTY TABLES Type Load Speed A. 40 60 80 100 lbs. ii iC (( 200 F. P. 130 100 75 M. A. O. 100 lbs. 200 F. P. M. 130 150 150 n 130 (C 200 (( 100 250 (( 75 A. A. 200 lbs. 200 F. P. M. 250 (i 150 (( 300 ii 130 6( 350 u 100 a A. B. 400 : lbs. 100 F. P. M. 500 75 (( Counterweight necessary. No slack cable device. No slowing up device. Do not use, if accurate stop is desired, at higher speed than 130 F. P. M. AUTOMATIC Limit of travel, 100 feet. STOP Limit of No. of stops, 10. 2 or 3 No limit of stops. BUTTON If travel over 100 ft,, allow for weight of cables in figuring duty. ROPE Limit of speed, 130 F. P. M. If travel over 100 feet, al¬ low for weight of cables in figuring duty. Hatchway Dimensions \* /. / 'V. .V- J - “S H. Seiden ■ .'(< f*’ ^ . I > S- >* ' ^ Y H / \ 'A • ^ ^ ' •*►. •i - j V n AVERY LfERARY COLUMBIA UNlVCRilTY' ' i